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- W4313397101 abstract "Abstract Due to thermal carriers generated by a narrow mid-infrared energy gap, cooling is always necessary to achieve ideal photodetection. In quantum dot (QD), the electron thermal generation should be reduced with quantum confinement in all three dimensions. As a result, there would be a great potential to realize high-operating-temperature (HOT) QD mid-IR photodetectors, though not yet achieved. Taking the advantages of colloidal nanocrystals’ solution processability and precise doping control by surface dipoles, this work demonstrates a HOT mid-infrared photodetector with a QD gradient homojunction. The detector achieves background-limited performance with D * = 2.7 × 10 11 Jones on 4.2 μm at 80 K, above 10 11 Jones until 200 K, above 10 10 Jones until 280 K, and 7.6 × 10 9 Jones on 3.5 μm at 300 K. The external quantum efficiency also achieves more than 77% with responsivity 2.7 A/W at zero bias. The applications such as spectrometers, chemical sensors, and thermal cameras, are also approved, which motivate interest in low-cost, solution-processed and high-performance mid-infrared photodetection beyond epitaxial growth bulk photodetectors." @default.
- W4313397101 created "2023-01-06" @default.
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- W4313397101 date "2023-01-01" @default.
- W4313397101 modified "2023-10-13" @default.
- W4313397101 title "High-operating-temperature mid-infrared photodetectors via quantum dot gradient homojunction" @default.
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- W4313397101 doi "https://doi.org/10.1038/s41377-022-01014-0" @default.
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