Understanding the Halogenation Effects in Diketopyrrolopyrrole-Based Small Molecule Photovoltaics

Shi-Xin Sun; Yong Huo; Miao-Miao Li; Xiaowen Hu; Hai-Jun Zhang; You-Wen Zhang; You-Dan Zhang; Xiao-Long Chen; Zi-Fa Shi; Xiong Gong; Yongsheng Chen; Hao-Li Zhang

doi:10.1021/acsami.5b03488

Understanding the Halogenation Effects in Diketopyrrolopyrrole-Based Small Molecule Photovoltaics

ACS Appl Mater Interfaces. 2015 Sep 16;7(36):19914-22. doi: 10.1021/acsami.5b03488. Epub 2015 Aug 31.

Authors

Affiliations

¹ State Key Laboratory of Applied Organic Chemistry (SKLAOC), Key Laboratory of Special Function Materials and Structure Design (MOE), College of Chemistry and Chemical Engineering, Lanzhou University , Lanzhou, 730000, P. R. China.
² Institute of Polymer Chemistry and Collaborative Innovation Center of Chemical Science and Engineering, College of Chemistry, Nankai University , Tianjin, 300071, P. R. China.
³ Department of Polymer Engineering, College of Polymer Science and Engneering and Department of Polymer Engineering, College of Polymer Science and Engineering, The University of Akron , Akron, Ohio 44236, United States.

PMID: 26261995
DOI: 10.1021/acsami.5b03488

Abstract

Two molecules containing a central diketopyrrolopyrrole and two oligothiophene units have been designed and synthesized. Comparisons between the molecules containing terminal F (FDPP) and Cl (CDPP) atoms allowed us to evaluate the effects of halogenation on the photovoltaic properties of the small molecule organic solar cells (OSCs). The OSCs devices employing FDPP:PC71BM films showed power conversion efficiencies up to 4.32%, suggesting that fluorination is an efficient method for constructing small molecules for OSCs.

Keywords: device optimization; diketopyrrolopyrrole; halogenation effect; organic solar cells; solution-processed small molecules.

Publication types

Research Support, Non-U.S. Gov't