Wenzhou Key Laboratory of Micro-nano Optoelectronic Devices, College of Electrical and Electronic Engineering, Wenzhou University, Wenzhou, Zhejiang 325035, China.
Engineering Research Center of Optical Instrument and System, the Ministry of Education, Shanghai Key Laboratory of Modern Optical System, University of Shanghai for Science and Technology, Shanghai 200093, China.
ACS Appl Mater Interfaces. 2022 Jan 26;14(3):4767-4774. doi: 10.1021/acsami.1c22501. Epub 2022 Jan 11.
Natural compound eyes endow arthropods with wide-field high-performance light-harvesting capability that enables them to capture prey and avoid natural enemies in dim light. Inspired by natural compound eyes, a curved artificial-compound-eye (cACE) photodetector for diffused light harvesting is proposed and fabricated, and its light-harvesting capability is systematically investigated. The cACE photodetector is fabricated by introducing a cACE as a light-harvesting layer on the surface of a silicon-based photodetector, with the cACE being prepared via planar artificial-compound-eye (pACE) template deformation. The distinctive geometric morphology of the as-prepared cACE effectively reduces its surface reflection and the dependence of the projected area on the incident light direction, thereby significantly improving the light-harvesting ability and output photocurrent of the silicon-based photodetector. Furthermore, the performances of cACE, pACE, and bare polydimethylsiloxane (PDMS)-attached photodetectors as diffused light detectors are investigated under different luminances. The cACE-photodetector output photocurrent is 1.395 and 1.29 times those of the bare PDMS-attached and pACE photodetectors, respectively. Moreover, this photodetector has a desirable geometric shape. Thus, the proposed cACE photodetector will facilitate development of high-performance photodetectors for luminance sensing.
天然复眼使节肢动物具有宽视场、高性能的光捕获能力，使它们能够在暗光下捕捉猎物和躲避天敌。受天然复眼启发，提出并制备了用于漫散光收集的曲面人工复眼（cACE）光电探测器，并对其光捕获能力进行了系统研究。该 cACE 光电探测器通过在硅基光电探测器表面引入 cACE 作为光收集层来制备，cACE 通过平面人工复眼（pACE）模板变形来制备。所制备的 cACE 的独特几何形态有效降低了其表面反射率和投影面积对入射光方向的依赖性，从而显著提高了硅基光电探测器的光捕获能力和输出光电流。此外，还研究了不同亮度下 cACE、pACE 和裸聚二甲基硅氧烷（PDMS）附着光电探测器作为漫散光探测器的性能。cACE 光电探测器的输出光电流分别是裸 PDMS 附着光电探测器和 pACE 光电探测器的 1.395 和 1.29 倍。此外，这种光电探测器具有理想的几何形状。因此，所提出的 cACE 光电探测器将有助于开发用于亮度感应的高性能光电探测器。
