Ma Yao, Shan Leting, Ying Yiran, Shen Liang, Fu Yufeng, Fei Linfeng, Lei Yusheng, Yue Nailin, Zhang Wei, Zhang Hong, Huang Haitao, Yao Kai, Chu Junhao
State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, International Center of Future Science, Jilin University, Changchun, China.
Institute of Photovoltaics, School of Physics and Materials Science, Nanchang University, Nanchang, China.
Nat Commun. 2024 Aug 30;15(1):7516. doi: 10.1038/s41467-024-51762-3.
Day-Night imaging technology that obtains full-color and infrared images has great market demands for security monitoring and autonomous driving. The current mainstream solution relies on wide-spectrum silicon photodetectors combined with Infrared Cutfilter Removal, which increases complexity and failure rate. Here, we address these challenges by employing a perovskite photodetector based on Pb-Sn alloyed single crystal with a vertical bandgap-graded structure that presents variable-spectrum responses at different biases and extends the infrared detection range close to 1100 nm. Taking advantage of the Pb-Sn gradients in mobility and built-in field, the perovskite photodetector shows a large linear dynamic range of 177 dB. In addition, the optoelectronic characteristics feature long-term operational stability over a year. We further develop an imaging module prototype without Infrared Cutfilter Removal that exhibits excellent color fidelity with RGB color differences ranging from 0.48 to 2.46 under infrared interference and provides over 26-bit grayscale resolution in infrared imaging.
可获取全彩和红外图像的日夜成像技术在安全监控和自动驾驶领域有着巨大的市场需求。当前的主流解决方案依赖于结合了红外截止滤光片去除技术的宽光谱硅光电探测器，这增加了复杂性和故障率。在此，我们通过采用基于具有垂直带隙梯度结构的Pb-Sn合金单晶的钙钛矿光电探测器来应对这些挑战，该探测器在不同偏压下呈现可变光谱响应，并将红外探测范围扩展至接近1100纳米。利用Pb-Sn在迁移率和内建电场方面的梯度，该钙钛矿光电探测器展现出177分贝的大线性动态范围。此外，其光电特性具有超过一年的长期运行稳定性。我们进一步开发了一个无需去除红外截止滤光片的成像模块原型，该原型在红外干扰下表现出出色的色彩保真度，RGB色差范围为0.48至2.46，并在红外成像中提供超过26位的灰度分辨率。
