期刊
ADVANCED OPTICAL MATERIALS
卷 8, 期 15, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adom.202000370
关键词
flexible photodetector arrays; heterostructures; light imaging; sequential printing
资金
- National Key R&D Program of China [2018YFA0208501, 2018YFA0703200]
- National Natural Science Foundation of China [51803217, 51773206, 91963212, 51961145102]
- Youth Innovation Promotion Association CAS [2020032]
- K. C. Wong Education Foundation
- Beijing National Laboratory for Molecular Sciences [BNLMS-CXXM-202005]
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 x 10(12) Jones, R = 12.9 A W-1). Moreover, the printed pixel interval can be decreased to 10 mu m (10(6) pixels cm(-2); resolution: 2.5 x 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.
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