Journal
LASER & PHOTONICS REVIEWS
Volume 12, Issue 1, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/lpor.201700209
Keywords
inorganic perovskites; photodetectors; perovskite nanocrystals; CsPbI3; perovskite photodiodes
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Funding
- Space Core Technology Development Program through the National Research Foundation of Korea (NRF) - Ministry of Education [NRF-2014M1A3A3A02034707, NRF-2015R1C1A1A02037219]
- Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Education [NRF-2014M1A3A3A02034707, NRF-2015R1C1A1A02037219]
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High-performance and high-reliability photodiodes are demonstrated by using -CsPbI3 perovskite nanocrystals (NCs) phase-stabilized with a low-temperature solution-treated active layer. In addition to the high charge mobility, the high absorption coefficient, and IR-blind characteristics of the perovskite material, the defect-tolerant nature of -CsPbI3 perovskite NCs are combined to realize hysteresis-free and high detectivity photodiodes. To further minimize interface defects originating from multi-layer photodiode construction, a poly(3-hexylthiophene) layer is strategically introduced as a passivation and electron blocking layer, resulting in a low diode ideality factor of 1.5 and a noise equivalent power of 1.6 x 10(-13) W Hz(-0.5). As a result, high detectivity of 1.8 x 10(12) Jones is demonstrated with near-zero hysteresis. Furthermore, the optimized photodiode exhibits excellent stability under high humidity conditions owing to the intrinsic nature of the defect-tolerant -CsPbI3 perovskite NCs.
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