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Printed High‐Density and Flexible Photodetector Arrays via Size‐matched Heterogeneous Micro‐/Nanostructure
Author(s) -
Pan Qi,
Chen Sisi,
Su Meng,
Li Pengwei,
Zhang Zeying,
Hu Xiaotian,
Chen Gangshu,
Huang Zhandong,
Chen Bingda,
Chen Shuoran,
Song Yanlin
Publication year - 2020
Publication title -
advanced optical materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.89
H-Index - 91
ISSN - 2195-1071
DOI - 10.1002/adom.202000370
Subject(s) - materials science , photodetector , heterojunction , optoelectronics , transfer printing , fabrication , photoelectric effect , nanostructure , semiconductor , photonics , nanotechnology , medicine , alternative medicine , pathology , composite material
Semiconductor/metal binary systems constitute the core components in electronic/photonic devices. The domain size of the heterostructure should be comparable to the charge diffusion length for superior photoelectric response. However, the fabrication of size‐matched heterostructures is still a challenge, especially for printed devices. Here, a high‐density photodetector array with lateral semiconductor/metal heterostructure is achieved via the template‐assisted sequentially printing strategy. The Ag/PBDB‐T:ITIC/Ag based lateral heterojunction that matches the charge diffusion length in the charge transfer process provides high light response sensitivity ( D * = 3.41 × 10 12 Jones, R = 12.9 A W −1 ). Moreover, the printed pixel interval can be decreased to 10 µm (10 6 pixels cm −2 ; resolution: 2.5 × 10 3 dpi). As the printing strategy can be implemented on soft substrates, the photodetector arrays are endowed with the flexibility. This work demonstrates a simple and effective strategy for chip‐scale fabrication of flexible high‐performance photodetectors, which validates the potential of printed heterogeneous micro‐/nanostructures for integrated active electronics and optics.