Bipolar dual-broadband photodetectors based on perovskite heterojunctions
In: Nano Futures, Jg. 6 (2022-06-01), S. 025006-25006
Online
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Zugriff:
The development of efficient photodetectors for color recognition is of great importance for many applications. In this paper, we report a novel bipolar dual-broadband photodetector equipped with a perovskite heterojunction, with bidirectional broadband responses in the short-wavelength and long-wavelength regions at zero bias voltage, enabled by a charge separation reversion mechanism. The unique aerosol–liquid–solid technique allowed the perovskite heterojunction to be fabricated by successively depositing wide-bandgap perovskite (WBP) and narrow-bandgap perovskite (NBP) layers directly on the transparent substrate. For photodetectors based on the perovskite heterojunctions, the short-wavelength photons were depleted by the bottom WBP layer and generated negative responses, while the long-wavelength photons were absorbed by the top NBP layer and generated positive responses. Moreover, the demarcation wavelength between the bipolar responses and the cut-off wavelength can be easily tuned by adjusting the bandgaps (or compositions) of the bottom and top perovskite layers.
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Bipolar dual-broadband photodetectors based on perovskite heterojunctions
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Autor/in / Beteiligte Person: | Li, Yu ; Guo, Fumin ; Yu, Shanshan ; Wang, Jian ; Yang, Shihe |
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Zeitschrift: | Nano Futures, Jg. 6 (2022-06-01), S. 025006-25006 |
Veröffentlichung: | IOP Publishing, 2022 |
Medientyp: | unknown |
ISSN: | 2399-1984 (print) |
DOI: | 10.1088/2399-1984/ac7099 |
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