High Performance All-Polymer Photodetector Comprising a Donor-Acceptor-Acceptor Structured Indacenodithiophene-Bithieno[3,4- c]Pyrroletetrone Copolymer

Petri Murto; Zewdneh Genene; Cindy Montenegro Benavides; Xiaofeng Xu; Anirudh Sharma; Xun Pan; Oliver Schmidt; Christoph J Brabec; Mats R Andersson; Sandro F Tedde; Wendimagegn Mammo; Ergang Wang

doi:10.1021/acsmacrolett.8b00009

High Performance All-Polymer Photodetector Comprising a Donor-Acceptor-Acceptor Structured Indacenodithiophene-Bithieno[3,4- c]Pyrroletetrone Copolymer

ACS Macro Lett. 2018 Apr 17;7(4):395-400. doi: 10.1021/acsmacrolett.8b00009. Epub 2018 Mar 14.

Authors

Petri Murto¹, Zewdneh Genene^{1

2

3}, Cindy Montenegro Benavides^{4

5}, Xiaofeng Xu¹, Anirudh Sharma^{6

7}, Xun Pan⁶, Oliver Schmidt⁴, Christoph J Brabec^{5

8}, Mats R Andersson⁶, Sandro F Tedde⁴, Wendimagegn Mammo², Ergang Wang¹

Affiliations

¹ Department of Chemistry and Chemical Engineering/Applied Chemistry, Chalmers University of Technology, SE-412 96 Gothenburg, Sweden.
² Department of Chemistry, Addis Ababa University, P.O. Box 33658, Addis Ababa, Ethiopia.
³ Department of Chemistry, Ambo University, P.O. Box 19, Ambo, Ethiopia.
⁴ Siemens Healthineers, Technology Center, Günther-Scharowsky-Str. 1, 91058 Erlangen, Germany.
⁵ Friedrich-Alexander Universität Erlangen-Nürnberg, Department für Material Science, i-MEET, Martensstrasse 7, 91058 Erlangen, Germany.
⁶ Flinders Centre for Nanoscale Science and Technology, Flinders University, Sturt Road, Bedford Park, Adelaide, SA 5042, Australia.
⁷ University of Bordeaux, Laboratoire de Chimie des Polymères Organiques (LCPO), UMR 5629, B8 allée Geoffroy Saint Hilaire, 33615 Pessac Cedex, France.
⁸ ZAE Bayern, Renewable Energies, Immerwahrstrasse 2, 91058 Erlangen, Germany.

PMID: 35619351
DOI: 10.1021/acsmacrolett.8b00009

Abstract

The synthesis of an acceptor polymer PIDT-2TPD, comprising indacenodithiophene (IDT) as the electron-rich unit and an interconnected bithieno[3,4-c]pyrrole-4,4',6,6'-tetrone (2TPD) as the electron-deficient unit, and its application for all-polymer photodetectors is reported. The optical, electrochemical, charge transport, and device properties of a blend of poly(3-hexylthiophene) and PIDT-2TPD are studied. The blend shows strong complementary absorption and balanced electron and hole mobility, which are desired properties for a photoactive layer. The device exhibits dark current density in the order of 10^-5 mA/cm², external quantum efficiency broadly above 30%, and nearly planar detectivity over the entire visible spectral range (maximum of 1.1 × 10¹² Jones at 610 nm) under -5 V bias. These results indicate that PIDT-2TPD is a highly functional new type of acceptor and further motivate the use of 2TPD as a building block for other n-type materials.