Proceedings of nanoGe Fall Meeting 2021 (NFM21)
DOI: https://doi.org/10.29363/nanoge.nfm.2021.031
Publication date: 23rd September 2021
The excellent optoelectronic properties of metal halide perovskites, such as strong light absorption, slow charge recombination, defect tolerance, and large carrier mobility, make them good candidates not only for solar cells but also for photodetectors. Their tunable bandgap allows light detection of near-infrared and visible light, which can be extended with combination of low-bandgap organic light absorbers. High-performance photodetectors with sensitivity superior to silicon ones have been quickly demonstrated with the capability to resolve weak light of sub-picowatt per square centimeter and short response speed of sub-nanosecond. In addition, new functionalities, such as wavelength selectivity, can easily be achieved without using a filter. In this talk, I will present the progress in understanding the noise, gain, sensitivity and color selectivity of perovskite photodetectors. The challenges, particularly stability, will be briefed as well, for applications such as X-ray imaging.
We thank the financially support from the Department of the Defense, Defense Threat Reduction Agency under award HDTRA1-20-2-0002. The content of the information does not necessarily reflect the position or the policy of the federal government, and no official endorsement should be inferred.
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