期刊
ADVANCED MATERIALS
卷 32, 期 12, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.201908258
关键词
color selectivity; nonfullerene acceptors; organic photodiodes; printedelectronics; visible-light communication
类别
资金
- German Ministry for Education and Research (BMBF) [FKZ: 03INT606AG]
- Ministry of Science, Research and the Arts Baden-Wurttemberg, through the HEiKA materials research center FunTECH-3D (MWK) [33-753-30-20/3/3]
- German Research Foundation (DFG) [INST 35/1314-1 FUGG]
- European Commission [675867]
- Swiss National Science Foundation [200020_184819]
- DFG [2082/1 - 390761711]
- University of Bern
- Swiss National Science Foundation (SNF) [200020_184819] Funding Source: Swiss National Science Foundation (SNF)
Future lightweight, flexible, and wearable electronics will employ visible-light-communication schemes to interact within indoor environments. Organic photodiodes are particularly well suited for such technologies as they enable chemically tailored optoelectronic performance and fabrication by printing techniques on thin and flexible substrates. However, previous methods have failed to address versatile functionality regarding wavelength selectivity without increasing fabrication complexity. This work introduces a general solution for printing wavelength-selective bulk-heterojunction photodetectors through engineering of the ink formulation. Nonfullerene acceptors are incorporated in a transparent polymer donor matrix to narrow and tune the response in the visible range without optical filters or light-management techniques. This approach effectively decouples the optical response from the viscoelastic ink properties, simplifying process development. A thorough morphological and spectroscopic investigation finds excellent charge-carrier dynamics enabling state-of-the-art responsivities >10(2) mA W-1 and cutoff frequencies >1.5 MHz. Finally, the color selectivity and high performance are demonstrated in a filterless visible-light-communication system capable of demultiplexing intermixed optical signals.
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