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- W2888104857 abstract "We fabricate photodetectors based on solution-processed single CH3NH3PbBr3 microcrystals (MCs) and map the two-photon absorption (TPA) excited photocurrent (PC) with spatial resolution of 1 μm. We find that the charge carrier transport length in the MCs depends on the applied electric field, and increases from 5.7 μm for 0.02 V bias (dominated by carrier diffusion) to 23.2 μm for 2 V bias (dominated by carrier drift). Furthermore, PC shows strong spatial variations. Combining the PC mapping results with time-resolved photoluminescence microscopy, we demonstrate that the spatial distribution of PC mainly originates from the inhomogeneous distribution of trap-states across perovskite MCs. This suggests that there is still large margin for improvement of perovskite single crystal devices by better controlling of the traps." @default.
- W2888104857 created "2018-08-31" @default.
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- W2888104857 date "2018-08-20" @default.
- W2888104857 modified "2023-10-18" @default.
- W2888104857 title "High Resolution Mapping of Two-Photon Excited Photocurrent in Perovskite Microplate Photodetector" @default.
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- W2888104857 doi "https://doi.org/10.1021/acs.jpclett.8b02250" @default.
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