Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/141282
Title: Two-photon optical properties in individual organic-inorganic perovskite microplates
Authors: Wei, Qi
Du, Bin
Wu, Bo
Guo, Jia
Li, Mingjie
Fu, Jianhui
Zhang, Zhipeng
Yu, Jianwei
Hou, Tianyu
Xing, Guichuan
Sum, Tze Chien
Huang, Wei
Keywords: Science::Physics::Optics and light
Issue Date: 2017
Source: Wei, Q., Du, B., Wu, B., Guo, J., Li, M., Fu, J., ... Huang, W. (2017). Two-photon optical properties in individual organic-inorganic perovskite microplates. Advanced Optical Materials, 5(24), 1700809-. doi:10.1002/adom.201700809
Journal: Advanced Optical Materials
Abstract: Metal-halide perovskites are recently extensively investigated as light absorbing material in solar cells. The outstanding optoelectronic properties and tunable light emission of the perovskites also make them promising candidates for light emitting diodes and lasers. However, understanding the relevant mechanisms and processes of the dependence of perovskite light emission on temperature and crystal size is still challenging. Herein, the CH3NH3PbBr3 monocrystals of different sizes are uniformly excited by two-photon absorption at 800 nm (100 fs, 1 KHz). In contrast to the reported relative large exciton binding energy (≈76 meV) and spectrum clearly resolved excitonic absorption, the light emission origin in CH3NH3PbBr3 microcrystals at room temperature is unambiguously determined to be dominated by free electron–hole bimolecular recombination. The coherent light emission threshold of CH3NH3PbBr3 microcrystal increases with temperature, which is closely related to the temperature induced transition from exciton gas to free charge carriers. In addition, the coherent light emission threshold is found to decrease with the microcrystal size, which could be well interpreted by the interaction between the optical confinement, defect density, and cavity quantum electrodynamics effect. These results presented here may facilitate the development of perovskite light emitting diodes and lasers.
URI: https://hdl.handle.net/10356/141282
ISSN: 2195-1071
DOI: 10.1002/adom.201700809
Rights: This is the peer reviewed version of the following article: Wei, Q., Du, B., Wu, B., Guo, J., Li, M., Fu, J., ... Huang, W. (2017). Two-photon optical properties in individual organic-inorganic perovskite microplates. Advanced Optical Materials, 5(24), 1700809-. doi:10.1002/adom.201700809, which has been published in final form at 10.1002/adom.201700809. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Journal Articles

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