Volume 36, Issue 5 pp. 411-416
Concise Report

Polymer Electron Acceptors Based on Fluorinated Isoindigo Unit for Polymer Solar Cells

Junhui Miao

Junhui Miao

State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022 China

University of Science and Technology of China, Hefei, Anhui, 230026 China

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Han Xu

Han Xu

State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022 China

Center for Advanced Optoelectronic Functional Materials Research, Northeast Normal University, Changchun, Jilin 130024 China

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Bin Meng

Corresponding Author

Bin Meng

State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022 China

E-mail: [email protected] (B.M.); [email protected] (J.L.)Search for more papers by this author
Jun Liu

Corresponding Author

Jun Liu

State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022 China

E-mail: [email protected] (B.M.); [email protected] (J.L.)Search for more papers by this author
Lixiang Wang

Lixiang Wang

State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022 China

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First published: 12 February 2018
Citations: 10
Dedicated to the Special Issue of “Polymer Solar Cells”.

Abstract

Most of efficient polymer electron acceptors for polymer solar cells (PSCs) are based on naphthalene diimide or perylene diimide as the electron deficient building block. In this paper, for the first time, we report polymer electron acceptors based on fluorinated isoindigo (F-IID) as the electron deficient building block. We synthesized two polymer electron acceptors consisting of alternating F-IID unit and thiophene/selenophen unit. They show low-lying LUMO/HOMO energy levels of –3.69/–5.69 eV, high electron mobilities of 1.31×10–5 cm2·V–1·s–1 and broad absorption spectra with the optical bandgap of 1.61 eV. PSC devices using the two F-IID-based polymers as polymer electron acceptors show encouraging power conversion efficiencies (PCEs) of up to 1.50% with an open-circuit voltage (VOC) of 0.97 V, a short-circuit current density (JSC) of 2.91 mA·cm–2, and a fill factor (FF) of 53.2%. This work suggests a new kind of polymer electron acceptors based on F-IID unit.

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