Chemical Research in Chinese Universities ›› 2024, Vol. 40 ›› Issue (5): 894-900.doi: 10.1007/s40242-024-4139-9

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Filterless Photosensors with Intrinsic Color Perception and Flexibility

ZHOU Hongtao1, XU Beihang1, ZHENG Xinjia1, GONG Jinchao1, ZHANG Kaitong2, HE Yonglin1   

  1. 1. Key Laboratory of Advanced Light Conversion Materials and Biophotonics, School of Chemistry and Life Resources, Renmin University of China, Beijing 100872, P. R. China;
    2. School of Mathematics, Renmin University of China, Beijing 100872, P. R. China
  • Received:2024-05-30 Online:2024-10-01 Published:2024-09-26
  • Contact: HE Yonglin,heman@ruc.edu.cn E-mail:heman@ruc.edu.cn
  • Supported by:
    This work was supported by the Beijing Natural Science Foundation,China (No.2242037) and the National Natural Science Foundation of China (No.22005336).

Abstract: Sensing materials possessing intrinsic color perception are indispensable prerequisites for the development of filterless photosensors, which could eliminate the need for complex device designs and avoid color distortion in post-processing. Traditional materials are constrained by complex processing methods and limited stability. Herein, a color-photosensitive array based on ionic liquid with selective photothermal conversion (ILSPC) has been developed for intrinsic color perception. Relying on the selective absorption, photothermal conversion, and thermosensitivity of ILSPC, a photo-thermo-electric sensing system has been constructed. Besides, the versatility of the two algorithms has been validated in color reconstruction and electrical signal prediction. As an exploration, the photosensitive array showcases promising color recognition capabilities, potentially propelling the evolution of flexible photosensors.

Key words: Ionic liquid, Filterless, Intrinsic color perception, Selective photothermal conversion, Photosensitive array