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Broadband Ultraviolet Self-Powered Photodetector Constructed on Exfoliated β-Ga2O3/CuI Core–Shell Microwire Heterojunction with Superior Reliability
The Journal of Physical Chemistry Letters ( IF 4.8 ) Pub Date : 2020-12-27 , DOI: 10.1021/acs.jpclett.0c03382 Shan Li 1 , Yusong Zhi 1 , Chao Lu 2 , Chao Wu 3 , Zuyong Yan 1 , Zeng Liu 1 , Jian Yang 2 , Xulong Chu 1, 4 , Daoyou Guo 3 , Peigang Li 1 , Zhenping Wu 1 , Weihua Tang 1
The Journal of Physical Chemistry Letters ( IF 4.8 ) Pub Date : 2020-12-27 , DOI: 10.1021/acs.jpclett.0c03382 Shan Li 1 , Yusong Zhi 1 , Chao Lu 2 , Chao Wu 3 , Zuyong Yan 1 , Zeng Liu 1 , Jian Yang 2 , Xulong Chu 1, 4 , Daoyou Guo 3 , Peigang Li 1 , Zhenping Wu 1 , Weihua Tang 1
Affiliation
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A heterojunction is an essential strategy for multispectral energy-conservation photodetection for its ability to separate photogenerated electron–hole pairs and tune the absorption edge by selecting semiconductors with appropriate bandgaps. A broadband ultraviolet (200–410 nm) self-powered photodetector is constructed on the exfoliated β-Ga2O3/CuI core–shell microwire heterostructure. Benefiting from the photovoltaic and photoconductive effects, our device performs an excellent ultraviolet (UV) discriminability with a UVC/visible rejection ratio (R225/R600) of 8.8 × 103 and a UVA/visible rejection ratio (R400/R600) of 2.7 × 102, and a self-powered photodetection with a responsivity of 8.46 mA/W, a detectivity of 7.75 × 1011 Jones, an on/off switching ratio of 4.0 × 103, and a raise/decay speed of 97.8/28.9 ms under UVC light. Even without encapsulation, the photodetector keeps a superior stability over ten months. The intrinsically physical insights of the device behaviors are investigated via energy band diagrams, and the charge carrier transfer characteristics of the β-Ga2O3/CuI interface are predicted by first principle calculation.
中文翻译：
宽带紫外线自供电光电探测器构造在剥离型β-镓2 ö 3 /碘化亚铜核壳异质微丝与卓越的可靠性
异质结是通过选择具有适当带隙的半导体来分离光生电子-空穴对和调整吸收边的能力，是多光谱节能光电检测的重要策略。宽带紫外线（200-410纳米）自供电光检测器被构造上剥离β-嘎2 ö 3 /碘化亚铜核壳微丝异质结构。受益于光伏效应和光电导效应，我们的设备具有出色的紫外线（UV）判别能力，其UVC /可见排斥比（R 225 / R 600）为8.8×10 3，UVA /可见排斥比（R 400 /[R 600）的2.7×10 2，并用8.46毫安/ W，7.75×10个的探测灵敏度的响应自供电光检测11个琼斯，4.0×10的开/关切换率3，和一个升/衰减在UVC光照下的最高速度为97.8 / 28.9 ms。即使没有封装，光电探测器也可以在十个月内保持出色的稳定性。该装置行为的固有物理见解通过能带图的调查，和的电荷载流子传输特性的β-嘎2 ö 3 /接口的CuI通过第一原理计算预测。
更新日期：2021-01-14
中文翻译：
宽带紫外线自供电光电探测器构造在剥离型β-镓2 ö 3 /碘化亚铜核壳异质微丝与卓越的可靠性
异质结是通过选择具有适当带隙的半导体来分离光生电子-空穴对和调整吸收边的能力，是多光谱节能光电检测的重要策略。宽带紫外线（200-410纳米）自供电光检测器被构造上剥离β-嘎2 ö 3 /碘化亚铜核壳微丝异质结构。受益于光伏效应和光电导效应，我们的设备具有出色的紫外线（UV）判别能力，其UVC /可见排斥比（R 225 / R 600）为8.8×10 3，UVA /可见排斥比（R 400 /[R 600）的2.7×10 2，并用8.46毫安/ W，7.75×10个的探测灵敏度的响应自供电光检测11个琼斯，4.0×10的开/关切换率3，和一个升/衰减在UVC光照下的最高速度为97.8 / 28.9 ms。即使没有封装，光电探测器也可以在十个月内保持出色的稳定性。该装置行为的固有物理见解通过能带图的调查，和的电荷载流子传输特性的β-嘎2 ö 3 /接口的CuI通过第一原理计算预测。
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