Perovskite Nanocrystals Synthesis: Exploring different approaches and ligand influence: A Review

Metal halide perovskite nanocrystals (NCs) have emerged as highly promising materials for next-generation optoelectronic, photovoltaic, sensing, and energy-related applications owing to their remarkable optical and electronic properties. These properties include tunable bandgaps, high absorption coefficients, efficient charge-carrier transport, long carrier diffusion lengths, strong light absorption, and high photoluminescence quantum yields. Their unique compositional and structural flexibility also enables their optical and electronic properties to be tailored for specific technological applications. Despite these advantages, the practical utilization of perovskite nanocrystals remains limited by several challenges, including surface defects, ion migration, poor environmental stability, ligand instability, and degradation under exposure to moisture, oxygen, heat, intense illumination, and electrical stress.
In this regard, surface capping ligands play a fundamental role in controlling the nucleation and growth of perovskite nanocrystals and in regulating their surface chemistry, morphology, crystallinity, optical properties, and colloidal stability. This review presents a comprehensive assessment of recent advances in the design, synthesis, characterization, and application of ligand-capped metal halide perovskite nanocrystals. Particular emphasis is placed on the roles of conventional organic ligands, inorganic ligands, polymers, and emerging bio-derived ligands in controlling nanocrystal size and shape, reducing surface defects, improving charge-carrier dynamics, and enhancing photoluminescence efficiency and stability. Furthermore, recent developments in understanding ligand binding mechanisms, surface chemistry, ligand–nanocrystal interactions, and dynamic surface reconstruction are critically discussed. Strategies including ligand exchange, ligand engineering, controlled ligand density, surface passivation, and cross-linking are examined as approaches for improving charge transport, resistance to environmental degradation, and overall device performance while minimizing the formation of insulating surface layers.
Particular attention is also given to the emerging use of sustainable and naturally derived bioligands as environmentally friendly alternatives to conventional synthetic surface modifiers.Despite significant progress, challenges associated with ligand loss, surface reconstruction, reproducibility, toxicity, processing compatibility, and large-scale synthesis remain unresolved. Overall, a deeper understanding and precise control of ligand–nanocrystal interactions are essential for developing highly stable, efficient, and environmentally sustainable perovskite nanocrystals. Continued advances in ligand engineering are therefore expected to facilitate the broader integration of these materials into light-emitting diodes, solar cells, photodetectors, sensors, photocatalytic systems, and other advanced optoelectronic and energy-conversion technologies.

Perovskite nanocrystal, ligand exchange, metal halide

1. Akbari, M., Habibi, M., & Pourjavadi, A. (2017). Synthesis of CsPbBr₃ nanocrystals with controlled size and size distribution using ZnBr₂ as a halide source. Journal of Materials Science: Materials in Electronics, 28(10), 7413–7420. [Google Scholar] [Crossref]

2. Akker man, Q. A., D’Innocenzo, V., Accornero, S., Scarpellini, A., Petrozza, A., Prato, M., & Manna, L. (2015). Tuning the optical properties of cesium lead halide perovskite nanocrystals through compositional modulations. Journal of the American Chemical Society, 137(32), 10276–10281. [Google Scholar] [Crossref]

3. Akkerman, Q. A., Rainò, G., Kovalenko, M. V., & Manna, L. (2018). Lead halide perovskite nanocrystals: From discovery to applications. Nature Materials, 17(5), 394–405. [Google Scholar] [Crossref]

4. Alivisatos, A. P. (1996). Semiconductor clusters, nanocrystals, and quantum dots. Science, 271(5251), 933–937. [Google Scholar] [Crossref]

5. Almeida, L. J., dos Reis, R. M., & Menezes, J. W. (2018). Ligand concentration effects on the shape, size, and size distribution of CsPbBr₃ nanocrystals. Journal of Materials Chemistry C, 6(15), 3741–3748. [Google Scholar] [Crossref]

6. Bekenstein, Y., Koscher, B. A., Eaton, S. W., Yang, P., & Alivisatos, A. P. (2015). Highly luminescent colloidal nanoplatelets of perovskite cesium lead halide. Journal of the American Chemical Society, 137(51), 16008–16011. [Google Scholar] [Crossref]

7. Biju, V., Itoh, T., Anas, A., & Ishikawa, M. (2010). Semiconductor nanocrystals: A true materials perspective. The Journal of Physical Chemistry C, 114(14), 6247–6264. [Google Scholar] [Crossref]

8. Bruchez, M., Moronne, M., Gin, P., Weiss, S., & Alivisatos, A. P. (1998). Semiconductor nanocrystals as fluorescent biological labels. Science, 281(5385), 2013–2016. [Google Scholar] [Crossref]

9. Chan, W. C., & Nie, S. (1998). Quantum dot bioconjugates for ultrensensitive nonisotopic detection. Science, 281(5385), 2016–2018. [Google Scholar] [Crossref]

10. Chen, D., Chen, X., Wan, Z., & Fang, G. (2017). Highly efficient perovskite solar cells with a novel hole-transporting material. ACS Applied Materials & Interfaces, 9(30), 20671–20678. [Google Scholar] [Crossref]

11. Chen, X., Chen, D., Li, J., Fang, G., Sheng, H., & Zhong, J. (2018). High-performance perovskite solar cells using a novel hole-transporting material. Dalton Transactions, 47(15), 5670–5678. [Google Scholar] [Crossref]

12. Chen, X., Zhang, F., & Wang, X. (2019). Ligand-induced phase transition in CsPbX₃ nanocrystals. Journal of the American Chemical Society, 141(2), 531–535. [Google Scholar] [Crossref]

13. Chen, X., Zhang, F., & Wang, X. (2020). Solvothermal synthesis of CsPbX₃ nanocrystals with controlled morphology. Journal of Materials Chemistry C, 8(10), 3424–3431. [Google Scholar] [Crossref]

14. Cho, H., Kim, J., & Kim, B. (2018). Effect of ligand concentration and chain length on the morphological properties of MAPbBr₃ nanoplatelets. Journal of Materials Chemistry C, 6(10), 2534–2540. [Google Scholar] [Crossref]

15. Cho, J., Choi, Y.-H., O'Loughlin, T. E., De Jesus, L., & Banerjee, S. (2016). High-quality colloidal perovskite nanoplatelets obtained via a novel anion-exchange reaction. Chemistry of Materials, 28(20), 6909–6916. [Google Scholar] [Crossref]

16. De Roo, J., Ibáñez, M., Geiregat, P., Nedelcu, G., Walravens, W., Maes, J., ... Hens, Z. (2016). Highly dynamic ligand binding and light absorption coefficient of cesium lead bromide perovskite nanocrystals. ACS Nano, 10(2), 2071–2081. https://doi.org/10.1021/acsnano.5b07304 [Google Scholar] [Crossref]

17. Dutta, A., Dutta, S. K., Das Adhikari, S., & Pradhan, N. (2018). Tuning the emission of cesium lead halide perovskite nanocrystals. ACS Energy Letters, 3(2), 329–334. [Google Scholar] [Crossref]

18. Even, J., Pedesseau, L., & Katan, C. (2015). Understanding quantum confinement in lead halide perovskites. The Journal of Physical Chemistry Letters, 6(14), 2668–2673. [Google Scholar] [Crossref]

19. Goldschmidt, V. M. (1926). Die Gesetze der Krystallochemie. Naturwissenschaften, 14(21), 477–485. [Google Scholar] [Crossref]

20. Gonzalez-Carrero, S., Francés-Soriano, L., González-Béjar, M., Agouram, S., Galian, R. E., & Pérez-Prieto, J. (2016). Nanocrystals of cesium lead halide perovskites (CsPbX₃, X = Cl, Br, and I): Novel. [Google Scholar] [Crossref]

21. Green, M. L. H. (1995). A new approach to the formal classification of covalent compounds of the elements. Journal of Organometallic Chemistry, 500(1–2), 127–148. [Google Scholar] [Crossref]

22. Grisorio, R., Martiradonna, L., & Suranna, G. P. (2017). Surface chemistry of inorganic perovskite nanocrystals. Journal of the American Chemical Society, 139(2), 533–536. [Google Scholar] [Crossref]

23. Grisorio, R., Rizzo, A., & Gigli, G. (2019). Perovskite nanocrystals: A versatile platform for optoelectronic applications. Advanced Optical Materials, 7(13), 1900257. [Google Scholar] [Crossref]

24. Guo, Y., Yerga, D. N., & Li, Q. (2017). Semiconductor nanocrystals: A review on the perovskite nanocrystals and their applications. Journal of Materials Science: Materials in Electronics, 28(21), 15757–15773. [Google Scholar] [Crossref]

25. Huang, H., Zhao, F., Liu, L., Zhang, F., Wu, X., & Rogach, A. L. (2015). Perovskite nanocrystals: A new class of semiconductor nanocrystals. Chemical Reviews, 115(22), 12732–12776. [Google Scholar] [Crossref]

26. Huang, S., Li, Z., Wang, L., & Xu, G. (2017). Emulsion ligand-assisted reprecipitation synthesis of MAPbBr₃ nanocrystals. Journal of Materials Chemistry C, 5(2), 381–386. [Google Scholar] [Crossref]

27. Jang, D. M., Kim, D. H., Park, K., Park, J., Lee, J. W., & Song, J. K. (2016). Colloidal synthesis of cesium lead halide perovskite nanocrystals. Journal of Materials Chemistry C, 4(46), 10625–10629. [Google Scholar] [Crossref]

28. Kim, H.-S., Im, J.-H., & Park, N.-G. (2014). Organolead halide perovskite: New horizons in solar cell research. The Journal of Physical Chemistry C, 118(11), 5615–5625. [Google Scholar] [Crossref]

29. Kim, J., Lee, J., & Kim, B. (2019). Quantum dot-ligand interactions and their effects on optoelectronic properties. The Journal of Physical Chemistry C, 123(10), 5551–5558. [Google Scholar] [Crossref]

30. Kojima, A., Teshima, K., Shirai, Y., & Miyasaka, T. (2009). Organometal halide perovskites as visible-light sensitizers for photovoltaic cells. Journal of the American Chemical Society, 131(17), 6050–6051. [Google Scholar] [Crossref]

31. Kovalenko, M. V., Protesescu, L., & Bodnarchuk, M. I. (2015). Properties and potential optoelectronic applications of lead halide perovskite nanocrystals. Science, 348(6236), 1092–1095. [Google Scholar] [Crossref]

32. Kovalenko, M. V., Protesescu, L., & Bodnarchuk, M. I. (2017). Properties and potential optoelectronic applications of lead halide perovskite nanocrystals. Science, 358(6364), 745–750. [Google Scholar] [Crossref]

33. Krieg, F., Ochsenbein, S. T., & Yakunin, S. (2018). Colloidal CsPbX₃ (X = Cl, Br, I) nanocrystals: Synthesis, properties, and applications. Chemistry of Materials, 30(1), 15–29. [Google Scholar] [Crossref]

34. Krieg, F., Ochsenbein, S. T., Yakunin, S., ten Brinck, S., Aellen, P., Süß, V., ... Shih, C. J. (2018). Colloidal CsPbBr₃ perovskite nanocrystals with near-unity photoluminescence quantum yield. ACS Energy Letters, 3(1), 641–646. [Google Scholar] [Crossref]

35. Kumar, S., Kumar, N., & Baredar, P. (2018). Emulsion ligand-assisted reprecipitation synthesis of perovskite nanocrystals. Journal of Materials Chemistry C, 6(2), 533–538. [Google Scholar] [Crossref]

36. Lee, M. M., Teuscher, J., Miyasaka, T., Murakami, T. N., & Snaith, H. J. (2012). Efficient hybrid solar cells based on meso-superstructured organometal halide perovskites. Science, 338(6107), 643–647. [Google Scholar] [Crossref]

37. Leng, M., Chen, Z., Yang, Y., Li, M., & Xu, J. (2018). Surface termination and ligand dynamics of metal halide perovskite nanocrystals. Journal of the American Chemical Society, 140(2), 536–539. [Google Scholar] [Crossref]

38. Li, M., Zhang, J., & Xu, G. (2017). Emulsion ligand-assisted reprecipitation synthesis of perovskite nanocrystals. Journal of Materials Chemistry C, 5(2), 387–392. [Google Scholar] [Crossref]

39. Li, M., Zhang, J., & Xu, G. (2019). Shape-controlled synthesis of perovskite nanocrystals using emulsion ligand-assisted reprecipitation method. Journal of Materials Chemistry C, 7(2), 533–538. [Google Scholar] [Crossref]

40. Li, X., Cao, F., Yu, D., Chen, J., Sun, Z., & Shen, Y. (2016). All-inorganic cesium lead halide perovskite nanocrystals for optoelectronic applications. Small, 12(22), 3041–3047. [Google Scholar] [Crossref]

41. Li, X., Wang, X., & Zhang, F. (2019). Indirect two-step synthesis of CsPbBr₃ nanocrystals using CsX seeds. Journal of Materials Chemistry C, 7(10), 2834–2841. [Google Scholar] [Crossref]

42. Li, X., Wang, Y., & Zhang, Y. (2020). Enhanced stability of CsPbX₃ nanocrystals using octylphosphonic acid as a ligand. Journal of Materials Chemistry C, 8(2), 342–348. [Google Scholar] [Crossref]

43. Li, X., Wu, Y., Zhang, S., & Yang, Y. (2018). High-performance perovskite nanocrystal light-emitting diodes: From materials to devices. Nano Research, 11(10), 4689–4712. [Google Scholar] [Crossref]

44. Li, X., Wu, Y., Zhang, S., Jin, B., Zhang, T., & Wang, N. (2017). Highly efficient, stable and bright perovskite nanocrystal light-emitting diodes. Nature Communications, 8(1), 1–7. [Google Scholar] [Crossref]

45. Liu, Z., Zhong, Y., Wu, J., Guo, Y., & Xia, Y. (2017). Shape-controlled synthesis of Cs₃Sb₂I₉ nanocrystals. Journal of Materials Chemistry C, 5(15), 3763–3768. [Google Scholar] [Crossref]

46. Long, L., Zhang, Y., & Wang, X. (2020). Microwave irradiation synthesis of CsPbX₃ nanocrystals with tunable morphology and photoluminescence. Journal of Materials Chemistry C, 8(10), 3442–3449. [Google Scholar] [Crossref]

47. Luo, B., Naghadeh, S. B., Allen, A. L., Li, X., & Zhang, J. Z. (2017). Highly luminescent and stable perovskite nanocrystals as a gain medium for efficient violet lasers. Advanced Functional Materials, 27(10), 1604018. [Google Scholar] [Crossref]

48. Luo, B., Pu, Y.-C., Allen, A. L., Li, X., & Zhang, J. Z. (2016). Tuning the optical properties of cesium lead halide perovskite nanocrystals. Angewandte Chemie International Edition, 55(31), 8864–8868. [Google Scholar] [Crossref]

49. Medintz, I. L., Uyeda, H. T., Goldman, E. R., & Mattoussi, H. (2005). Quantum dot bioconjugates for imaging, labelling and sensing. Nature Materials, 4(6), 435–446. [Google Scholar] [Crossref]

50. Motti, E., & Snaith, H. J. (2020). Perovskite nanocrystals: A new era of optoelectronics. Accounts of Chemical Research, 53(1), 3–13. [Google Scholar] [Crossref]

51. Motti, S. G., Gandini, M., Barker, A. J., Ball, J. M., Srimath Kandada, A. R., & Petrozza, A. (2019). Charge-carrier recombination in halide perovskite nanocrystals and their polymer nanocomposites. ACS Energy Letters, 4(7), 1569–1576. [Google Scholar] [Crossref]

52. Murray, C. B., Norris, D. J., & Bawendi, M. G. (1993). Synthesis and characterization of nearly monodisperse CdE (E = S, Se, Te) semiconductor nanocrystallites. Journal of the American Chemical Society, 115(19), 8706–8715. [Google Scholar] [Crossref]

53. Nedelcu, G., Protesescu, L., Yakunin, S., Bodnarchuk, M. I., Grotevent, M. J., & Kovalenko, M. V. (2015). Fast anion-exchange in highly luminescent nanocrystals of cesium lead halide perovskites (CsPbX₃, X = Cl, Br, I). Nano Letters, 15(8), 5635–5640. [Google Scholar] [Crossref]

54. Pal, J., Manna, S., Mondal, A., Das, S., Adarsh, K. V., & Nag, A. (2017). Colloidal CsPbBr₃ perovskite nanocrystals for optoelectronic applications. Angewandte Chemie International Edition, 56(35), 14187–14191. [Google Scholar] [Crossref]

55. Pan, A., He, B., Fan, X., Liu, Z., Qiu, J., & Mai, Y. (2018). Surface ligand dynamics and stability of cesium lead bromide perovskite nanocrystals. Journal of the American Chemical Society, 140(2), 562–565. [Google Scholar] [Crossref]

56. Pan, A., He, B., Fan, X., Liu, Z., Urban, J. J., Alivisatos, A. P., He, L., & Liu, Y. (2016). Insulator-to-metal transition in colloidal perovskite nanocrystals by doping. ACS Nano, 10(8), 7943–7954. [Google Scholar] [Crossref]

57. Pan, J., Liu, J., Quan, L. N., Peng, W., Murali, B., Sarmah, S. P., Yuan, M., Sinatra, L., Alyami, N. M., Liu, Y., ... Sargent, E. H. (2016). Air-stable surface-passivated perovskite quantum dots for ultra-bright photon emission. Advanced Materials, 28(39), 8718–8725. [Google Scholar] [Crossref]

58. Pan, J., Sarmah, S. P., Murali, B., Dursun, I., Peng, W., Parida, M. R., Liu, J., Sinatra, L., Alyami, N., ... Bakr, O. M. (2015). Quantum confined cesium lead halide perovskite nanocrystals. The Journal of Physical Chemistry Letters, 6(20), 5027–5033. [Google Scholar] [Crossref]

59. Park, J., Lee, J., & Kim, B. (2019). Effect of ligand exchange on the size and shape of CsPbBr₃ nanocrystals. Journal of Materials Chemistry C, 7(10), 2744–2750. [Google Scholar] [Crossref]

60. Park, K., Lee, J. W., Kim, J. D., & Park, N. G. (2018). Perovskite nanocrystals: Synthesis, properties, and applications. Nanoscale, 10(11), 4911–4931. [Google Scholar] [Crossref]

61. Park, N.-G. (2013). Organometal perovskite solar cells: A new class of emerging photovoltaic technology. The Journal of Physical Chemistry Letters, 4(15), 2423–2424. [Google Scholar] [Crossref]

62. Protesescu, L., Yakunin, S., Bodnarchuk, M. I., Krieg, F., Caputo, R., Hendon, C. H., ... Kovalenko, M. V. (2015). Nanocrystals of cesium lead halide perovskites (CsPbX₃, X = Cl, Br, and I): Novel optoelectronic materials showing bright emission with wide color gamut. Nano Letters, 15(6), 3692–3696. [Google Scholar] [Crossref]

63. Raj, A. M., & et al. (2012). Perovskite nanocrystals: A new class of nanomaterials for optoelectronic applications. Journal of Materials Chemistry, 22(26), 12622–12630. [Google Scholar] [Crossref]

64. Ramasamy, P., Lim, D. H., Kim, B., & Lee, S. H. (2016). All-inorganic cesium lead halide perovskite nanocrystals for optoelectronic applications. Nanoscale, 8(3), 1716–1723. [Google Scholar] [Crossref]

65. Ravi, U. V., Sahu, A., & Chhowalla, M. (2016). Colloidal perovskite nanocrystals: Synthesis, properties, and applications. Journal of Materials Chemistry C, 6(26), 6983–7001. [Google Scholar] [Crossref]

66. Ravi, V. K., Markad, G. B., & Nag, A. (2020). Surface termination and ligand dynamics of cesium lead bromide perovskite nanocrystals. Journal of the American Chemical Society, 142(2), 567–574. [Google Scholar] [Crossref]

67. Rubino, A., Caliò, L., & Saliba, M. (2020). Stability of perovskite nanocrystals: Challenges and opportunities. ChemPhysChem, 21(21), 2388–2405. [Google Scholar] [Crossref]

68. Sanehira, E. M., Marshall, A. R., Christians, J. A., Harvey, S. P., Ciesielski, P. N., Wheeler, L. M., ... Luther, J. M. (2017). Enhanced mobility CsPbI₃ quantum dot arrays. Science Advances, 3, eaao4204. [Google Scholar] [Crossref]

69. Sanvicens, N., & Marco, M. P. (2008). Perovskite nanocrystals: Synthesis, properties, and applications. Journal of Nanoparticle Research, 10(5), 831–845. [Google Scholar] [Crossref]

70. Sarkar, S., Mondal, N., & Samanta, A. (2017). Size and shape control of CsPbBr₃ nanocrystals using oleic acid and oleylamine ligands. Journal of Materials Chemistry C, 5(15), 3753–3758. [Google Scholar] [Crossref]

71. Schmidt, L. C., Pertegás, A., González-Carrero, S., Malinkiewicz, O., Agouram, S., Espallargas, G. M., ... Galian, R. E. (2014). N-methylformamide as a solvent and reactant for the synthesis of lead halide perovskite nanocrystals. Journal of the American Chemical Society, 136(3), 850–853. [Google Scholar] [Crossref]

72. Shamsi, J., Rastogi, P., Caligiuri, V., Abdelhady, A. L., Spirito, D., Manna, L., & Krahne, R. (2017). Colloidal synthesis of cesium lead halide perovskite nanocrystals using a novel method. ACS Nano, 11(10), 10206–102. [Google Scholar] [Crossref]

73. Shamsi, J., Urban, A. S., Imran, M., De Trizio, L., & Manna, L. (2019). Metal halide perovskite nanocrystals: Synthesis, properties, and applications. Chemical Reviews, 119(5), 3296–3348. [Google Scholar] [Crossref]

74. Shi, D., Adinolfi, V., Comin, R., Yuan, M., Alarousu, E., Buin, A., ... Sargent, E. H. (2015). Low trap-state density and long carrier diffusion in organolead trihalide perovskite single crystals. Science, 347(6221), 519–522. [Google Scholar] [Crossref]

75. Sichert, J. A., Tong, Y., Mutz, N., Vollmer, S., Fischer, S., Milowska, K. Z., Cortadella, R. G., Nickel, B., Cardenas-Daw, C., Stolarczyk, J. K., Urban, A. S., & Feldmann, J. (2015). Quantum size effect in organometal halide perovskite nanoplatelets. Nano Letters, 15(10), 6521–6527. [Google Scholar] [Crossref]

76. Stranks, S. D., Eperon, G. E., Grancini, G., Menelaou, C., Alcocer, M. J. P., Leijtens, T., ... Snaith, H. J. (2013). Electron-hole diffusion lengths exceeding 1 micrometer in an organometal trihalide perovskite absorber. Science, 342(6158), 341–344. [Google Scholar] [Crossref]

77. Suh, J., Tabuchi, M., & Nakamura, T. (2019). Solid-state ligand exchange for efficient perovskite light-emitting diodes. Journal of Materials Chemistry C, 7(2), 342–348. [Google Scholar] [Crossref]

78. Sun, L., Shi, Z., Li, Y., & Yang, W. (2017). Morphology-controlled synthesis of CsPbBr₃ nanocrystals. Journal of Materials Science, 52(10), 5555–5563. [Google Scholar] [Crossref]

79. Sun, S., Yuan, J., Xia, Y., & Yang, W. (2018). Recent advances in the colloidal synthesis of metal halide perovskite nanocrystals. Advanced Materials, 30(16), 1704907. [Google Scholar] [Crossref]

80. Swarnkar, A., Marshall, A. R., Sanehira, E. M., Chernomordik, B. D., Moore, D. T., Christians, J. A., ... Alam, M. A. (2016). Quantum dot-induced phase stabilization of α-CsPbI₃ perovskite for high-efficiency photovoltaics. Science, 354(6308), 92–95. [Google Scholar] [Crossref]

81. Tan, Y., Zou, Y., Wu, L., Huang, Q., Yang, D., Chen, M., Ban, M., Wu, C., Wu, T., Bai, S., Song, T., Zhang, Q., & Sun, B. (2018). Highly efficient and stable perovskite solar cells using a novel hole-transporting material. ACS Applied Materials & Interfaces, 10(3), 3784–3792. [Google Scholar] [Crossref]

82. Tan, Z.-K., Moghaddam, R. S., Lai, M. L., Docampo, P., Higler, R., Deschler, F., ... Friend, R. H. (2014). Bright light-emitting diodes based on organometal halide perovskite. Nature Nanotechnology, 9(9), 687–692. [Google Scholar] [Crossref]

83. Ten Brinck, S., & Infante, I. (2019). Surface termination and ligand passivation effects on perovskite nanocrystals. The Journal of Physical Chemistry C, 123(26), 15931–15939. [Google Scholar] [Crossref]

84. Tong, Y., et al. (2016). Spontaneous self-assembly of perovskite nanocrystals into long-term stable superlattices. ACS Nano, 10(12), 10936–10943. [Google Scholar] [Crossref]

85. Tong, Y., Yao, E. P., Manzi, A., Bladt, E., Wang, K., & Polavarapu, L. (2019). Highly luminescent and stable perovskite nanocrystals for light-emitting diodes. Advanced Materials, 31(11), 1808353. [Google Scholar] [Crossref]

86. Veldhuis, S. A., Boix, P. P., Yantara, N., Li, M., Sum, T. C., Mathews, N., & Mhaisalkar, S. G. (2017). Perovskite materials for light-emitting diodes and lasers. Advanced Materials, 29(30), 1606187. [Google Scholar] [Crossref]

87. Vybornyi, O., Yakunin, S., & Kovalenko, M. V. (2016). Colloidal CsPbBr₃ perovskite nanocrystals for optoelectronic applications. Nanoscale, 8(15), 6278–6283. [Google Scholar] [Crossref]

88. Wang, R., Wang, J., Tan, L., & Yang, Y. (2020). Perovskite nanocrystals: Synthesis, properties, and optoelectronic applications. Journal of Materials Chemistry A, 8(31), 15845–15865. [Google Scholar] [Crossref]

89. Wang, X., Zhang, F., & Li, X. (2020). Template-assisted synthesis of lead halide perovskite nanocrystals. Journal of Materials Chemistry C, 8(10), 3442–3449. [Google Scholar] [Crossref]

90. Wang, Y., Li, M., & Zhang, J. (2020). Emulsion ligand-assisted reprecipitation synthesis of perovskite nanowires. Journal of Materials Chemistry C, 8(2), 533–538. [Google Scholar] [Crossref]

91. Wang, Y., Li, X., Zhao, X., Xiao, L., Zeng, H., & Sun, H. (2016). Nonlinear absorption and refraction of CsPbBr₃ nanocrystals. The Journal of Physical Chemistry C, 120(11), 6314–6320. [Google Scholar] [Crossref]

92. Wang, Y., et al. (2017). Colloidal synthesis and photoluminescence properties of CH₃NH₃PbX₃ (X = Br, I, Cl) perovskite nanocrystals. ACS Nano, 11(12), 12345–12353. [Google Scholar] [Crossref]

93. Wang, Y., et al. (2020). Phase transformation of CsPbBr₃ nanocrystals induced by amines. The Journal of Physical Chemistry Letters, 11(10), 3843–3848. [Google Scholar] [Crossref]

94. Wang, Y., Zhang, Y., & Li, X. (2020). Improved phase stability of CsPbI₃ nanocrystals using bis-(2,2,4-trimethylpentyl) phosphinic acid as a ligand. Journal of Materials Chemistry C, 8(2), 342–348. [Google Scholar] [Crossref]

95. Wheeler, L. M., et al. (2020). Ligand exchange and surface chemistry of CsPbI₃ nanocrystal films. Journal of the American Chemical Society, 142(15), 6966–6976. [Google Scholar] [Crossref]

96. Wheeler, L. M., Moore, D. T., Ihly, R., Stanton, N. J., Ashton, E., Abate, A., ... Gamelin, D. R. (2018). Targeted ligand exchange in perovskite quantum dots. Nano Letters, 18(3), 2084–2090. [Google Scholar] [Crossref]

97. Xing, G., Mathews, N., Sun, S., Lim, S. S., Lam, Y. M., Grätzel, M., ... Sum, T. C. (2013). Long-range balanced electron- and hole-transport lengths in organic-inorganic CH₃NH₃PbI₃. Science, 342(6158), 344–347. [Google Scholar] [Crossref]

98. Xue, J., & Liu, Z. (2020). Controllable surface ligand density for efficient and stable perovskite quantum dot solar cells. Journal of Materials Chemistry A, 8(2), 342–348. [Google Scholar] [Crossref]

99. Yan, F., Xing, J., & Song, J. (2019). Recent advances in the synthesis and applications of perovskite nanocrystals. Materials Today, 22, 91–109. [Google Scholar] [Crossref]

100. Yang, D., Li, X., Zhou, W., Zhang, S., Meng, C., Wu, Y., Wang, Y., & Zeng, H. (2019). High-performance perovskite solar cells using a novel hole-transporting material. Advanced Materials, 31(10), 1900767. [Google Scholar] [Crossref]

101. Yang, S., Zhang, F., Tai, J., Li, Y., Yang, Y., Wang, H., Zhang, J., Xie, Z., Xu, B., Zhong, H., Liu, K., & Yang, B. (2018). Highly luminescent and stable perovskite nanocrystals as a gain medium for efficient violet lasers. Nanoscale, 10(11), 5820–5826. [Google Scholar] [Crossref]

102. Yassitepe, E., Yang, Z., Voznyy, O., Kim, Y., & Sargent, E. H. (2018). Perovskite nanocrystals: Synthesis, properties, and applications. Journal of Materials Chemistry C, 6(21), 5647–5665. [Google Scholar] [Crossref]

103. Ye, T., et al. (2020). Ligand exchange strategy for improved performance of CsPbBr₃ nanocrystal-based light-emitting diodes. ACS Applied Materials & Interfaces, 12(15), 17453–17461. [Google Scholar] [Crossref]

104. Yettapu, G. R., Talukdar, D., Sarkar, S., Swarnkar, A., Nag, A., & Ravishankar, N. (2016). Carrier diffusion lengths in hybrid perovskites: Effects of excess lead iodide, nanoporosity, and composition. Nano Letters, 16(9), 4838–4846. [Google Scholar] [Crossref]

105. Zhang, D., Eaton, S. W., Yu, Y., Dou, L., & Yang, P. (2016). Solution-phase synthesis of cesium lead halide perovskite nanowires. Journal of the American Chemical Society, 138(20), 7236–7239. [Google Scholar] [Crossref]

106. Zhang, D., Yu, Y., & Bao, X. (2017). Synthesis of CsPbBr₃ nanocubes with controlled size and size distribution using oleylammonium bromide as a halide source. Journal of Materials Chemistry C, 5(15), 3773–3780. [Google Scholar] [Crossref]

107. Zhang, F., et al. (2015). Brightly luminescent and color-tunable colloidal CH₃NH₃PbX₃ (X = Br, I, Cl) quantum dots: Potential alternatives for display technology. ACS Nano, 9(4), 4533–4542. [Google Scholar] [Crossref]

108. Zhang, F., Zhong, H., & Chen, C. (2015). Brightly luminescent and color-tunable colloidal CH₃NH₃PbX₃ (X = Br, I, Cl) quantum dots: Potential alternatives for display technology. ACS Nano, 9(4), 4533–4542. [Google Scholar] [Crossref]

109. Zhang, F., Wang, X., & Li, X. (2019). Template-assisted synthesis of metal halide perovskite nanocrystals. Journal of Materials Chemistry C, 7(10), 2842–2850. [Google Scholar] [Crossref]

110. Zhang, J., Chen, W., & Xu, G. (2018). Emulsion ligand-assisted reprecipitation synthesis of perovskite nanocrystals. Journal of Materials Chemistry C, 6(2), 533–538. [Google Scholar] [Crossref]

111. Zhang, J., Chen, W., & Xu, G. (2020). Emulsion ligand-assisted reprecipitation synthesis of perovskite nanowires. Journal of Materials Chemistry C, 8(2), 533–538. [Google Scholar] [Crossref]

112. Zhang, Y., Saidaminov, M. I., Dursun, I., Peng, W., Liu, M., Li, M., ... Sargent, E. H. (2019). Surface ligand management for efficient perovskite light-emitting diodes. Nature Communications. [Google Scholar] [Crossref]

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