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Atomically Thin Oxyhalide Solar-Blind Photodetectors.
Small ( IF 13.0 ) Pub Date : 2020-04-29 , DOI: 10.1002/smll.202000228
Wei Han 1 , Chen Li 2 , Sanjun Yang 1 , Peng Luo 1 , Fakun Wang 1 , Xin Feng 1 , Kailang Liu 1 , Ke Pei 1 , Yuan Li 1 , Huiqiao Li 1 , Luying Li 2 , Yihua Gao 3 , Tianyou Zhai 1
Affiliation  

2D wide‐bandgap semiconductors demonstrate great potential in fabricating solar‐blind ultraviolet (SBUV) photodetectors. However, the low responsivity of 2D solar‐blind photodetectors still limits their practical applications. Here, high‐responsivity solar‐blind photodetectors are achieved based on 2D bismuth oxychloride (BiOCl) flakes. The 2D BiOCl photodetectors exhibit a responsivity up to 35.7 A W−1 and a specific detectivity of 2.2 × 1010 Jones under 250 nm illumination with 17.8 µW cm−2 power density. In particular, the enhanced photodetective performances are demonstrated in BiOCl photodetectors with increasing ambient temperature. Surprisingly, their responsivity can reach 2060 A W−1 at 450 K under solar‐blind light illumination, maybe owing to the formation of defective BiOCl grains evidenced by in situ transmission electron microscopy. The high responsivity throughout the solar‐blind range indicates that 2D BiOCl is a promising candidate for SBUV detection.

中文翻译:

原子薄的卤氧化物日盲光电探测器。

二维宽带隙半导体在制造太阳盲紫外线(SBUV)光电探测器方面显示出巨大潜力。但是,二维太阳盲光探测器的低响应性仍然限制了它们的实际应用。在此,基于二维氯氧化铋(BiOCl)薄片实现了高响应度的太阳盲光电探测器。二维BiOCl光电探测器在250 nm照明下以17.8 µW cm -2的功率密度显示出高达35.7 AW -1的响应度和2.2×10 10 Jones的比检测率。特别地,随着环境温度的升高,在BiOCl光电检测器中表现出增强的光电检测性能。令人惊讶的是,它们的响应度可以达到2060 AW -1太阳盲光照射下在450 K时的温度,可能是由于原位透射电子显微镜证明有缺陷的BiOCl晶粒的形成。在整个太阳盲范围内的高响应性表明2D BiOCl是SBUV检测的有希望的候选者。
更新日期:2020-04-29
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