Temperature-dependent photoluminescence on organic-inorganic metal halide perovskite CH_3NH_3PbI_(3-x)Cl_x prepared on ZnO/FTO substrates using a two-step method |
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| Affiliation: | State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, China |
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| Abstract: | Temperature-dependent photoluminescence characteristics of organic-inorganic halide perovskite CH3NH3PbI3-xClx films prepared using a two-step method on ZnO/FTO substrates were investigated. Surface morphology and absorption characteristics of the films were also studied. Scanning electron microscopy revealed large crystals and substrate coverage. The orthorhombic-to-tetragonal phase transition temperature was ~140 K. The films' exciton binding energy was 77.6±10.9 meV and the energy of optical phonons was 38.8±2.5 meV. These results suggest that perovskite CH3NH3PbI3-xClx films have excellent optoelectronic characteristics which further suggests their potential usage in perovskitebased optoelectronic devices. |
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| Keywords: | perovskite temperature-dependent photoluminescence two-step method ZnO |
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