Lewis Acid Doping Induced Synergistic Effects on Electronic and Morphological Structure for Donor and Acceptor in Polymer Solar Cells

Yan, Han; Chen, Jianya; Zhou, Ke; Tang, Yabing; Meng, Xiangyi; Xu, Xianbin; Ma, Wei

doi:10.1002/aenm.201703672

Title: Lewis Acid Doping Induced Synergistic Effects on Electronic and Morphological Structure for Donor and Acceptor in Polymer Solar Cells

Journal Article · Thu Mar 29 00:00:00 EDT 2018 · Advanced Energy Materials

DOI:https://doi.org/10.1002/aenm.201703672· OSTI ID:1430555

Yan, Han ^[1]; Chen, Jianya ^[1]; Zhou, Ke ^[2]; Tang, Yabing ^[1]; Meng, Xiangyi ^[1]; Xu, Xianbin ^[1];

^[1]

State Key Laboratory for Mechanical Behavior of Materials Xi'an Jiaotong University Xi'an 710049 P. R. China
State Key Laboratory for Mechanical Behavior of Materials Xi'an Jiaotong University Xi'an 710049 P. R. China, Biomolecular and Organic Electronics IFM Linköping University SE‐581 83 Linköping Sweden

Abstract Due to the attraction of optimizing the electronic structure beyond chemical synthesis, molecular doping has recently aroused wide interest in the field of organic solar cells. However, the selection of limited dopants confines its successful application. Inspired by the Lewis base characteristics of the photovoltaic materials, the Lewis acid as novel dopant is introduced in organic solar cells. In both fullerene and nonfullerene based blends, Lewis acid doping leads to increased photovoltaic performance. Detailed experiments reveal that Lewis acid doping has a synergistic effect on modifying the polymer's electronic properties and the acceptor's nanostructure even at low doping concentration, and these are simultaneously responsible for the device improvements. Based on the mechanism studies, it is proposed that the Lewis acid‐doped polymers anions produce induced dipole on the acceptor, this increases the intermolecular interaction and facilitates the morphology optimization. It is believed that the synergistic effect by Lewis acid doping greatly expands the application of doped organic solar cells, in concert with other existing methods to yield higher efficiency values.

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Sponsoring Organization:: USDOE

Grant/Contract Number:: DE‐AC02‐05CH11231

OSTI ID:: 1430555

Journal Information:: Advanced Energy Materials, Journal Name: Advanced Energy Materials Vol. 8 Journal Issue: 19; ISSN 1614-6832

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

Country of Publication:: Germany

Language:: English

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Cited by: 56 works

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