Synthesis and Optical Properties of Neodymium- Doped Perovskite Quantum Dots

   Colloidal quantum dots of the mixed-halide perovskite CsPb_0.8Nd_0.2BrCl₂ containing Nd³⁺ ions were synthesized and characterized. The nanocrystals were obtained by hot injection, followed by purification and transfer to a stable organic dispersion, which ensured the reproducible formation of Nd-containing particles and preserved colloidal stability. A comprehensive set of spectral and morphological studies revealed that the samples exhibit intense blue photoluminescence peaking at 457–458 nm and a narrow emission band. According to excitation-emission mapping, the position of the luminescence band remains virtually unchanged with varying excitation wavelength, indicating the relative homogeneity of the emitting states. The decay kinetics is described predominantly by a monoexponential dependence with a characteristic time of approximately 6.7 ns, and the photoluminescence quantum yield indicates a fairly high proportion of radiative recombination. Morphological analysis, DLS, and EDX mapping confirm the formation of nanoscale particles containing the main elements of the initial composition, including neodymium. It is shown that combined chloride substitution and the introduction of Nd³⁺ ions is an effective approach to obtaining blue-emitting perovskite nanocrystals, which are promising for optoelectronics, photonics, and scintillation applications.

1. Y. Zhou, J. Chen, O. M. Bakr, H.-T. Sun. Chem. Mater., 30 (2018) 6589—6613, doi: 10.1021/acs.chemmater.8b02989

2. W. Duan, L. Hu, W. Zhao, X. Zhang. J. Mater. Sci.: Mater. Electron., 33 (2022) 19019—19025, doi: 10.1007/s10854-022-08737-1

3. T. Chiba, J. Sato, S. Ishikawa, Y. Takahashi, H. Ebe, S. Sumikoshi, S. Ohisa, J. Kido. ACS Appl. Mater. Interfaces, 12 (2020) 53891—53898, doi: 10.1021/acsami.0c11736

4. Y. Pan, Y. Zhang, W. Kang, N. Deng, Z. Yan, W. Sun, X. Kang, J. Ni. Mater. Adv., 3 (2022) 4053—4068, doi: 10.1039/D2MA00100D

5. J. K. Ahn, S. Chebotaryov, J. H. Choi, S. Choi, W. Choi, Y. Choi, H. I. Jang, J. S. Jang, E. J. Jeon, I. S. Jeong, K. K. Joo, B. R. Kim, B. C. Kim, H. S. Kim, J. Y. Kim, S. B. Kim, S. H. Kim, S. Y. Kim, W. Kim, Y. D. Kim, J. Lee, J. K. Lee, I. T. Lim, K. J. Ma, M. Y. Pac, I. G. Park, J. S. Park, K. S. Park, J. W. Shin, K. Siyeon, B. S. Yang, I. S. Yeo, S. H. Yi, and I. Yu. Phys. Rev. Lett., 108 (2012) 191802, doi: 10.1103/PhysRevLett.108.191802

6. T. S. Bizyaeva, E. S. Nikolaeva, A. M. Pundikov. The Works VIAM, 10 (2023) 86—97, doi: 10.18577/2307-6046-2023-0-10-86-97.

7. J. Shamsi, A.S. Urban, M. Imran, L. De Trizio, L. Manna. Chem. Rev., 119 (2019) 3296—3348, doi: 10.1021/acs.chemrev.8b00644

8. K. Wang, L. Zheng, T. Zhu, X. Yao, C. Yi, X. Zhang, Y. Cao, L. Liu, W. Hu, X. Gong. Nano Energy, 61 (2019) 352—360, doi: 10.1016/j.nanoen.2019.04.073

9. Y. Chen, S. Liu, N. Zhou, N. Li, H. Zhou, L.D. Sun, C.H. Yan. Progress Mater. Sci., 120 (2021) 100737, doi: 10.1016/j.pmatsci.2020.100737

10. C. Collantes, W. Teixeira, V. Gonzalez-Pedro, M. J. Bañuls, Á. Maquieira. Appl. Mater. Today, 31 (2023) 101775, doi: 10.1016/j.apmt.2023.101775

11. F. P. An, J. Z. Bai, A. B. Balantekin, H. R. Band, D. Beavis, et al. Phys. Rev. Lett., 108 (2012) 171803, doi: 10.1103/PhysRevLett.108.171803

12. E. S. Ivanchikhina, A. M. Pundikov. Cond. Media and Interfacial Boundaries, 25 (2023) 519—528, doi: 10.17308/kcmf.2023.25/11623