期刊
CHINESE OPTICS LETTERS
卷 19, 期 10, 页码 -出版社
Optica Publishing Group
DOI: 10.3788/COL202119.103001
关键词
self-trapped excitons; 2D perovskite; Raman spectrum; excited states
类别
资金
- National Key Research and Development Program of China [2018YFA0704403]
- National Natural Science Foundation of China (NSFC) [62074064]
- Key Laboratory of Nanodevices and Applications, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences [19ZS03]
- China Postdoctoral Science Foundation [2020M682399]
- Postdoctoral Innovation Fund of Hubei Province
- Innovation Fund of WNLO
In this study, the existence of self-trapped excitons in 2D perovskites was identified using Raman spectroscopy in both excited and non-excited states, providing an alternative simple method for studying self-trapped excitons in this material.
Two-dimensional (2D) perovskites exhibit broadband emission due to strong exciton-phonon coupling-induced self-trapped excitons and thus would find important applications in the field of white-light emitting devices. However, the available identifying methods for self-trapped excitons are currently rather limited and complex. Here, we identify the existence of self-trapped excitons by Raman spectroscopy in both excited and non-excited states. Under excited states, the shifting of the Raman peak indicates the presence of the lattice distortion, which together with the extra Raman scattering peak reveals the presence of self-trapped excitons. Our work provides an alternative simple method to study self-trapped excitons in 2D perovskites.
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