Tandem organic photodetectors with tunable, broadband response

S. Matthew Menke; Richa Pandey; Russell J. Holmes

doi:10.1063/1.4768807

Tandem organic photodetectors with tunable, broadband response

S. Matthew Menke, Richa Pandey, Russell J. Holmes

Chemical Engineering and Materials Science

Research output: Contribution to journal › Article › peer-review

38 Scopus citations

Abstract

Broadband photodetection is achieved by integrating three electron donor materials with complementary absorption into an organic photodetector (OPD). While a single donor-acceptor heterojunction can show broadband response, the spectral tunability is intrinsically limited to the absorption profiles of the active materials. Here, we demonstrate broadband OPDs consisting of multiple bulk heterojunctions arranged in tandem. These OPDs show high responsivity under moderate reverse bias from the ultraviolet to the near-infrared. By combining materials with complementary absorption in a tandem OPD, we demonstrate that the response from each band can be separately tuned with manipulation of the heterojunction thicknesses or composition.

Original language	English (US)
Article number	223301
Journal	Applied Physics Letters
Volume	101
Issue number	22
DOIs	https://doi.org/10.1063/1.4768807
State	Published - Nov 26 2012

Bibliographical note

Funding Information:
This work was supported primarily by Raytheon Vision Systems. Partial support was also received from the University of Minnesota NSF Materials Research Science and Engineering Center (DMR-0819885). The authors would like to thank Sigma-Aldrich Corporation (New Products R&D) for providing SnNcCl. 2

Copyright:
Copyright 2012 Elsevier B.V., All rights reserved.

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abstract = "Broadband photodetection is achieved by integrating three electron donor materials with complementary absorption into an organic photodetector (OPD). While a single donor-acceptor heterojunction can show broadband response, the spectral tunability is intrinsically limited to the absorption profiles of the active materials. Here, we demonstrate broadband OPDs consisting of multiple bulk heterojunctions arranged in tandem. These OPDs show high responsivity under moderate reverse bias from the ultraviolet to the near-infrared. By combining materials with complementary absorption in a tandem OPD, we demonstrate that the response from each band can be separately tuned with manipulation of the heterojunction thicknesses or composition.",

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Tandem organic photodetectors with tunable, broadband response

Abstract

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