Isomeric Effects of Solution Processed Ladder‐Type Non‐Fullerene Electron Acceptors

Li, Yongxi; Zhong, Lian; Lin, Jiu‐Dong; Wu, Fu‐Peng; Bin, Hai‐Jun; Zhang, Zhanjun; Xu, Lai; Jiang, Zuo‐Quan; Zhang, Zhi‐Guo; Liu, Feng; Russell, Thomas P.; Li, Yongfang; Liao, Liang‐Sheng; Forrest, Stephen R.

doi:10.1002/solr.201700107

Isomeric Effects of Solution Processed Ladder‐Type Non‐Fullerene Electron Acceptors

Journal Article · Mon Sep 11 00:00:00 EDT 2017 · Solar RRL

DOI:https://doi.org/10.1002/solr.201700107· OSTI ID:1389094

Li, Yongxi ^[1]; Zhong, Lian ^[2]; Lin, Jiu‐Dong ^[3]; Wu, Fu‐Peng ^[3]; Bin, Hai‐Jun ^[4]; Zhang, Zhanjun ^[5]; Xu, Lai ^[6]; Jiang, Zuo‐Quan ^[6]; Zhang, Zhi‐Guo ^[4]; Liu, Feng ^[7]; Russell, Thomas P. ^[8]; Li, Yongfang ^[2]; Liao, Liang‐Sheng ^[3]; Forrest, Stephen R. ^[9]

Jiangsu Key Laboratory for Carbon‐Based Functional Materials &, Devices, Institute of Functional Nano &, Soft Materials (FUNSOM), Soochow University Suzhou Jiangsu 215123 China, Department of Electrical Engineering and Computer Science, University of Michigan Ann Arbor Michigan 48109 USA
Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences Beijing 100190 China, University of Chinese Academy of Sciences Beijing 100049 China
Jiangsu Key Laboratory for Carbon‐Based Functional Materials &, Devices, Institute of Functional Nano &, Soft Materials (FUNSOM), Soochow University Suzhou Jiangsu 215123 China
Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences Beijing 100190 China
University of Chinese Academy of Sciences Beijing 100049 China
Jiangsu Key Laboratory for Carbon‐Based Functional Materials &, Devices, Institute of Functional Nano &, Soft Materials (FUNSOM), Soochow University Suzhou Jiangsu 215123 China, Institute of Functional Nano &, Soft Materials (FUNSOM) Soochow University Suzhou Jiangsu 215123 China
Department of Physics and Astronomy, and Collaborative Innovation Center of IFSA (CICIFSA), Shanghai Jiaotong University Shanghai 200240 P. R. China, Department of Polymer Science and Engineering, University of Massachusetts Amherst MA 01003 USA
Department of Polymer Science and Engineering, University of Massachusetts Amherst MA 01003 USA
Department of Electrical Engineering and Computer Science, University of Michigan Ann Arbor Michigan 48109 USA

The role of electronic structure and thin film morphology is investigated in determining charge transfer and electron coupling due to orbital interactions in two isomeric non‐fullerene acceptors with the structure of acceptor‐donor‐acceptor. Differences are found in the distribution of electron density of the highest occupied molecular and lowest unoccupied molecular orbitals, whose bonding interactions result in improved intermolecular interactions and hence, molecular stacking. When combined with a large band gap polymer donor, solution‐processed organic photovoltaic cells are demonstrated with power conversion efficiencies as high as 10.5 ± 0.4%, and with absorption extending to wavelengths of 800 nm. Due to strong internal organization driven by the planar molecular structure and strong intermolecular interactions, no post‐deposition processing such as solvent vapor or thermal annealing is required. To our knowledge, these are the highest efficiencies for as‐cast solution‐based devices employing non‐fullerene acceptors.

View Accepted Manuscript (Publisher)

Sponsoring Organization:: USDOE

Grant/Contract Number:: EE0006708

OSTI ID:: 1389094

Journal Information:: Solar RRL, Journal Name: Solar RRL Journal Issue: 10 Vol. 1; ISSN 2367-198X

Publisher:: Wiley Blackwell (John Wiley & Sons)Copyright Statement

Country of Publication:: Germany

Language:: English

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