Visible and Near-Infrared Imaging with Nonfullerene-Based Photodetectors

Gasparini N, Gregori A, Salvador M, Biele M, Wadsworth A, Tedde S, Baran D, Mcculloch I, Brabec C (2018)

Publication Language: English

Publication Status: Published

Publication Type: Journal article

Publication year: 2018

Journal

Advanced Materials Technologies Wiley

Publisher: WILEY

Book Volume: 3

Journal Issue: 7

DOI: 10.1002/admt.201800104

Abstract

The solution-processed organic photodetectors underpin an emerging technology with inherent implications in the biological sensors and imaging displays. Conventional organic photodiodes, the core element of an organic photodetector, rely mainly on fullerene-based acceptors, which in combination with high and middle bandgap donors, limit the spectral photosensitivity to the visible range. Even in the case of low bandgap polymers the oscillator strength and thus the extinction coefficient are usually limited in the NIR due to the nature of molecular orbital hybridization. Instead, it is showed that pairing prototypical poly(3-hexylthiophene) (P3 HT) with rhodanine-benzothiadiazolecoupled indacenodithiophene (IDTBR), a nonfullerene electron acceptor absorbing beyond 750 nm, as the photoactive material of a simple photodiode results in a highly efficient organic photodetector with a record responsivity of 0.42 A W-1 and external quantum efficiency (EQE) of 69% in the NIR (755 nm) Nonfullerene-based photodiodes are processed on amorphous silicon active matrix backplanes to realize large area flat panel photodetector imagers able to detect objects under visible and NIR light conditions with an exceptional combination of responsivity, dynamic response and image crosstalk.

Authors with CRIS profile

Christoph Brabec Institute Materials for Electronics and Energy Technology (i-MEET)

Involved external institutions

King Abdullah University of Science and Technology (KAUST) / جامعة الملك عبد الله للعلوم و التقنية SA Saudi Arabia (SA) Siemens AG, Healthcare Sector DE Germany (DE) Imperial College London / The Imperial College of Science, Technology and Medicine GB United Kingdom (GB) Bayerisches Zentrum für Angewandte Energieforschung e.V. (ZAE Bayern) DE Germany (DE)

How to cite

APA:

Gasparini, N., Gregori, A., Salvador, M., Biele, M., Wadsworth, A., Tedde, S.,... Brabec, C. (2018). Visible and Near-Infrared Imaging with Nonfullerene-Based Photodetectors. Advanced Materials Technologies, 3(7). https://dx.doi.org/10.1002/admt.201800104

MLA:

Gasparini, Nicola, et al. "Visible and Near-Infrared Imaging with Nonfullerene-Based Photodetectors." Advanced Materials Technologies 3.7 (2018).

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