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Issue 34, 2017
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Ultrafast photoresponse organic phototransistors based on pyrimido[4,5-g]quinazoline-4,9-dione polymer

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Abstract

We report the photoresponse characteristics of a pyrimido[4,5-g]quinazoline-4,9-dione (PQ) based polymer, PPQ2T-BT-24, which served as an active channel layer in organic phototransistors (OPTs). OPTs using this polymer showed very short rise time of 3 ms and fall time of 59 ms, photoresponsivity (R) of 0.24 and external quantum efficiency (EQE) of 50%. When PC61BM was incorporated into PPQ2T-BT-24, a significantly shortened fall time of 8 ms along with a much-improved rise time of 1 ms were realized. These response times are among the best values reported for OPTs. The R and EQE of the devices using this polymer blend also increased to 0.88 A W−1 and 189%, respectively.

Graphical abstract: Ultrafast photoresponse organic phototransistors based on pyrimido[4,5-g]quinazoline-4,9-dione polymer

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Supplementary files

Article information


Submitted
06 Jul 2017
Accepted
08 Aug 2017
First published
08 Aug 2017

J. Mater. Chem. C, 2017,5, 8742-8748
Article type
Paper

Ultrafast photoresponse organic phototransistors based on pyrimido[4,5-g]quinazoline-4,9-dione polymer

J. T. E. Quinn, F. Haider, H. Patel, D. A. Khan, Z. Y. Wang and Y. Li, J. Mater. Chem. C, 2017, 5, 8742
DOI: 10.1039/C7TC03023A

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