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Infrared Photodetectors and Image Arrays Made with Organic Semiconductors

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Abstract

Combining the strategies of introducing larger heteroatom, regio-regular backbone and extended branching position of side-chain, we developed polymer semiconductors (PPCPD) with narrow band-gap to construct the photosensing layer of thin-film photodiodes and image arrays. The spectral response of the resulting organic photodiodes spans from the near ultra-violet to short-wavelength infrared region. The performance of these short-wavelength infrared photodiodes in 900–1200 nm range achieved a level competitive with that of indium gallium arsenide-based inorganic crystalline detectors, exhibiting a specific detectivity of 5.55×1012 Jones at 1.15 µm. High photodetectivity and quantum efficiency in photodiode with amorphous/nanocrystalline thin-films of 100–200 nm thickness enabled high pixel-density image arrays without pixel-level-patterning in the sensing layer. 1 × 256 linear diode arrays with 25 µm × 25 µm pixel pitch were achieved, enabling high pixel-density short-wavelength infrared imaging at room temperature.

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Acknowledgments

This work was financially supported by the National Natural Science Foundation of China (Nos. U21A6002 and 51933003) and the Basic and Applied Basic Research Major Program of Guangdong Province (No. 2019B030302007).

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  1. These authors contributed equally to this work.

Authors and Affiliations

  1. Institute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou, 510640, China

    Zhi-Ming Zhong, Feng Peng, Lei Ying, Zhen-Qiang Huang, Wen-Kai Zhong, Gang Yu, Yong Cao & Fei Huang

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  1. Zhi-Ming Zhong
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  2. Feng Peng
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  3. Lei Ying
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Correspondence to Lei Ying, Gang Yu or Fei Huang.

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Zhong, ZM., Peng, F., Ying, L. et al. Infrared Photodetectors and Image Arrays Made with Organic Semiconductors. Chin J Polym Sci 41, 1629–1637 (2023). https://doi.org/10.1007/s10118-023-2973-8

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  • DOI: https://doi.org/10.1007/s10118-023-2973-8

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