期刊
JOURNAL OF APPLIED PHYSICS
卷 128, 期 13, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/5.0022549
关键词
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资金
- Semiconductor Research Corporation
- Foundation at NJIT
- National Science Foundation [ECCS-1809112]
We show that photoluminescence properties of PbS nanocrystal thin films are directly related to film morphology and nanocrystal density. In densely packed PbS nanocrystal films, low-temperature donor-to-acceptor energy transfer is mainly responsible for the photoluminescence spectra narrowing and shift toward longer wavelengths. At elevated temperatures, back energy transfer is proposed to be responsible for an unusual photoluminescence intensity temperature dependence. In thin films with a low PbS nanocrystal density, the energy transfer is suppressed, and the effect is dramatically reduced.
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