Singlet Fission of Non-polycyclic Aromatic Molecules in Organic Photovoltaics

So Kawata; Yong-Jin Pu; Ayaka Saito; Yuki Kurashige; Teruo Beppu; Hiroshi Katagiri; Masaki Hada; Junji Kido

doi:10.1002/adma.201504281

Singlet Fission of Non-polycyclic Aromatic Molecules in Organic Photovoltaics

Adv Mater. 2016 Feb 24;28(8):1585-90. doi: 10.1002/adma.201504281. Epub 2015 Dec 14.

Authors

So Kawata¹, Yong-Jin Pu^{1

2}, Ayaka Saito¹, Yuki Kurashige^{2

3}, Teruo Beppu⁴, Hiroshi Katagiri⁴, Masaki Hada^{2

5}, Junji Kido¹

Affiliations

¹ Department of Organic Device Engineering, Yamagata University, Yonezawa, Yamagata, 992-8510, Japan.
² JST-PRESTO, Kawaguchi, Saitama, 332-0012, Japan.
³ Department of Theoretical and Computational Molecular Science, Institute for Molecular Science, Okazaki, Aichi, 444-8585, Japan.
⁴ Department of Chemistry and Chemical Engineering, Yamagata University, Yonezawa, Yamagata, 992-8510, Japan.
⁵ Materials and Structures Laboratory, Tokyo Institute of Technology, Yokohama, Kanagawa, 226-8503, Japan.

PMID: 26663207
DOI: 10.1002/adma.201504281

Abstract

Singlet fission of thienoquinoid compounds in organic photovoltaics is demonstrated. The escalation of the thienoquinoid length of the compounds realizes a suitable packing structure and energy levels for singlet fission. The magnetic-field dependence of the photocurrent and the external quantum efficiency of the devices reveal singlet fission of the compounds and dissociation of triplet excitons into charges.

Keywords: multiple carrier generation; organic photovoltaics; singlet fission; thienoquinoidal compounds.