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3 October 2022 Gigantic suppression of recombination rate in 3D Lead-Halide Perovskites for enhanced photodetector performance (Conference Presentation)
Mohamed El Kabbash, Chunlei Guo, Kwangjin Li
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Proceedings Volume PC12195, Metamaterials, Metadevices, and Metasystems 2022; PC121950P (2022) https://doi.org/10.1117/12.2638185
Event: SPIE Nanoscience + Engineering, 2022, San Diego, California, United States
Abstract
We show that the recombination rate from excitons in Lead Halide Perovskite (LHP) polycrystalline thin films is suppressed, rather than enhanced, when they are placed on hyperbolic metamaterials and a plasmonic substrate by 30% and 50%, respectively. We reveal that these LHP films enjoy a dominant in-plane transition dipole, which is responsible for the decrease in the recombination rate. In triple cation LHPs we observe a 10-fold decrease in the recombination rate, comparable to recombination rate suppression obtained by Photonic Crystal cavities. By controlling the recombination rate of LHPs, we demonstrate a 250% increase in photoresponsivity of LHP-based photodetectors.
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Mohamed El Kabbash, Chunlei Guo, and Kwangjin Li "Gigantic suppression of recombination rate in 3D Lead-Halide Perovskites for enhanced photodetector performance (Conference Presentation)", Proc. SPIE PC12195, Metamaterials, Metadevices, and Metasystems 2022, PC121950P (3 October 2022); https://doi.org/10.1117/12.2638185
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KEYWORDS
Perovskite
Photodetectors
Thin films
Luminescence
Metamaterials
Mirrors
Optoelectronics
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