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Highly stable and spectrum-selective ultraviolet photodetectors based on lead-free copper-based perovskites
Materials Horizons ( IF 12.2 ) Pub Date : 2019/10/17 , DOI: 10.1039/c9mh01371g Ying Li 1, 2, 3, 4, 5 , Zhifeng Shi 1, 2, 3, 4, 5 , Wenqing Liang 1, 2, 3, 4, 5 , Lintao Wang 1, 2, 3, 4, 5 , Sen Li 1, 2, 3, 4, 5 , Fei Zhang 1, 2, 3, 4, 5 , Zhuangzhuang Ma 1, 2, 3, 4, 5 , Yue Wang 1, 2, 3, 4, 5 , Yongzhi Tian 1, 2, 3, 4, 5 , Di Wu 1, 2, 3, 4, 5 , Xinjian Li 1, 2, 3, 4, 5 , Yuantao Zhang 5, 6, 7, 8, 9 , Chongxin Shan 1, 2, 3, 4, 5 , Xiaosheng Fang 5, 10, 11, 12
Materials Horizons ( IF 12.2 ) Pub Date : 2019/10/17 , DOI: 10.1039/c9mh01371g Ying Li 1, 2, 3, 4, 5 , Zhifeng Shi 1, 2, 3, 4, 5 , Wenqing Liang 1, 2, 3, 4, 5 , Lintao Wang 1, 2, 3, 4, 5 , Sen Li 1, 2, 3, 4, 5 , Fei Zhang 1, 2, 3, 4, 5 , Zhuangzhuang Ma 1, 2, 3, 4, 5 , Yue Wang 1, 2, 3, 4, 5 , Yongzhi Tian 1, 2, 3, 4, 5 , Di Wu 1, 2, 3, 4, 5 , Xinjian Li 1, 2, 3, 4, 5 , Yuantao Zhang 5, 6, 7, 8, 9 , Chongxin Shan 1, 2, 3, 4, 5 , Xiaosheng Fang 5, 10, 11, 12
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Ultraviolet (UV) photodetectors with high spectrum selectivity are highly desired for certain special applications, like selected-wavelength imaging and UV-phototherapy. Here, for the first time, a highly stable and spectrum-selective self-powered UV photodetector based on lead-free Cs3Cu2I5 films was demonstrated. By designing the Cs3Cu2I5/GaN heterojunction, a narrow spectral response “window” of 300–370 nm was realized, and the working mechanism was investigated through the dependence of the spectral response on the absorber thickness and bias voltage. Because of the high material integrity of the Cs3Cu2I5 films and competent interfacial charge transfer from Cs3Cu2I5 to GaN, the proposed device exhibits a remarkable photodetection capability. Moreover, the proposed photodetector without encapsulation exhibits excellent working stability in ambient air, and typically it can operate continuously for more than 12 h under a high operation temperature of 373 K, indicating a high temperature tolerance and desired performance for practical applications under harsh environments. In addition, the device was used as the sensing pixels in a UV imaging system, and high-resolution imaging patterns were achieved. The results highlight the great potential of such lead-free Cs3Cu2I5 as environment-friendly alternatives for stable and spectrum-selective UV photodetection without band-pass filters that can be employed in imaging.
中文翻译：
基于无铅铜基钙钛矿的高稳定性和光谱选择性紫外光电探测器
对于某些特殊应用，例如选定波长成像和UV光疗，非常需要具有高光谱选择性的紫外线（UV）光电探测器。在此，首次展示了基于无铅Cs 3 Cu 2 I 5膜的高稳定性和光谱选择性自供电紫外光电探测器。通过设计Cs 3 Cu 2 I 5 / GaN异质结，实现了300-370 nm的窄光谱响应“窗口”，并通过光谱响应对吸收体厚度和偏置电压的依赖性研究了工作机理。由于Cs 3 Cu 2 I 5的高材料完整性薄膜和从Cs 3 Cu 2 I 5到GaN的有效界面电荷转移，所提出的器件表现出显着的光电检测能力。此外，所提出的不带封装的光电探测器在环境空气中表现出出色的工作稳定性，通常在373 K的高工作温度下可以连续工作12小时以上，这表明它具有较高的温度承受能力和在恶劣环境下的实际应用所需的性能。此外，该设备被用作UV成像系统中的感测像素，并获得了高分辨率的成像图案。结果突出表明了这种无铅Cs 3 Cu 2 I 5的巨大潜力。 作为稳定的和光谱选择性的紫外线光电检测的环保替代品，而无需在成像中使用带通滤光片。
更新日期：2020-02-13
中文翻译：
基于无铅铜基钙钛矿的高稳定性和光谱选择性紫外光电探测器
对于某些特殊应用，例如选定波长成像和UV光疗，非常需要具有高光谱选择性的紫外线（UV）光电探测器。在此，首次展示了基于无铅Cs 3 Cu 2 I 5膜的高稳定性和光谱选择性自供电紫外光电探测器。通过设计Cs 3 Cu 2 I 5 / GaN异质结，实现了300-370 nm的窄光谱响应“窗口”，并通过光谱响应对吸收体厚度和偏置电压的依赖性研究了工作机理。由于Cs 3 Cu 2 I 5的高材料完整性薄膜和从Cs 3 Cu 2 I 5到GaN的有效界面电荷转移，所提出的器件表现出显着的光电检测能力。此外，所提出的不带封装的光电探测器在环境空气中表现出出色的工作稳定性，通常在373 K的高工作温度下可以连续工作12小时以上，这表明它具有较高的温度承受能力和在恶劣环境下的实际应用所需的性能。此外，该设备被用作UV成像系统中的感测像素，并获得了高分辨率的成像图案。结果突出表明了这种无铅Cs 3 Cu 2 I 5的巨大潜力。 作为稳定的和光谱选择性的紫外线光电检测的环保替代品，而无需在成像中使用带通滤光片。
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