Study of CsPbBr₃ Nanocrystals and Their Agglomerates by Combined Scanning Probe Microscopy and Optical Spectrometry
초록
The electric, piezoelectric, and optical properties of colloidally synthesized CsPbBr₃ nanocrystals (NCs) are studied by combined scanning probe microscopy and optical spectrometry. It is found that the CsPbBr₃ NCs have a cubic shape with an edge length of 10 nm. When deposited on a substrate, these NCs gather into faceted agglomerates up to several hundred nanometers in size. It is shown that the photoluminescence spectra contain, in addition to the main narrow edge-luminescence line (2.47 eV), two additional broad defect lines lying 40 and 200 meV lower than the main line. The NC agglomerates have a low surface potential (~20–30 mV) and contain a small amount of charges. It is shown that piezoelectric modulus d33 of CsPbBr₃ NC agglomerates does not exceed 1 pm/V.
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인용 방법
@article{opt-spectroscopy-cspbbr3-2018,
author = {Dement’ev, P. A. and Dunaevskii, M. S. and Matyushkin, L. B. and Nezhdanov, A. V. and Smirnov, A. N. and Filatov, D. O.},
title = {Study of CsPbBr₃ Nanocrystals and Their Agglomerates by Combined Scanning Probe Microscopy and Optical Spectrometry},
journal = {Optics and Spectroscopy},
volume = {125},
number = {6},
pages = {858--863},
year = {2018},
doi = {10.1134/s0030400x18120044}
}