Fine Optimization of Morphology Evolution Kinetics with Binary Additives for Efficient Non‐Fullerene Organic Solar Cells

Chen, Jianya; Bi, Zhaozhao; Xu, Xianbin; Zhang, Qianqian; Yang, Shengchun; Guo, Shengwei; Yan, Hongping; You, Wei; Ma, Wei

doi:10.1002/advs.201801560

Title: Fine Optimization of Morphology Evolution Kinetics with Binary Additives for Efficient Non‐Fullerene Organic Solar Cells

Journal Article · Mon Jan 28 00:00:00 EST 2019 · Advanced Science

DOI:https://doi.org/10.1002/advs.201801560· OSTI ID:1492484

Chen, Jianya ^[1]; Bi, Zhaozhao ^[2]; Xu, Xianbin ^[2]; Zhang, Qianqian ^[3]; Yang, Shengchun ^[1]; Guo, Shengwei ^[4]; Yan, Hongping ^[5]; You, Wei ^[3];

^[6]

State Key Laboratory for Mechanical Behavior of MaterialsXi'an Jiaotong University Xi'an 710049 China, School of ScienceMOE Key Laboratory for Non‐equilibrium Synthesis and Modulation of Condensed MatterXi'an Jiaotong University Xi'an 710049 China
State Key Laboratory for Mechanical Behavior of MaterialsXi'an Jiaotong University Xi'an 710049 China
Department of ChemistryUniversity of North Carolina at Chapel Hill Chapel Hill NC 27599 USA
College of Materials Science and EngineeringNorth Minzu University Yinchuan 750021 China
SLAC National Accelerator Laboratory Menlo Park CA 94025 USA
State Key Laboratory for Mechanical Behavior of MaterialsXi'an Jiaotong University Xi'an 710049 China, State Key Laboratory of Luminescent Materials and DevicesSouth China University of Technology Guangzhou 510640 China

The power conversion efficiency of polymer solar cells (PSCs) is strongly affected by active layer morphology. Here, two solvent additives (ODT: octance-1,8-dithiol; DIO: 1,8-diiodooctane) are used to optimize the bulk heterojunction morphology of FTAZ:ITIC-Th based PSCs and ≈11% efficiency is obtained, which is 10% higher than the untreated device. Based on the morphological characterizations, the influence of binary solvent additives on manipulating molecular packing and phase separation of blend films is successfully revealed. More importantly, in situ grazing incidence wide-angle X-ray scattering characterization is adopted to explore the crucial role played by these two solvent additives at different stages of the film-forming process, that is, ODT influences the initial stage of the film-forming process, while DIO later establishes the ultimate photoactive film formation. Due to the impacts of two additives at different film processing stages, an optimal ratio of ODT:DIO (0.375%:0.125%) is obtained, which helps in realizing the optimized morphology.

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Research Organization:: SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES); Natural Science foundation of Ningxia; Ministry Of Science and Technology

Grant/Contract Number:: AC02‐05CH11231; AC02-76SF00515; 2016YFA0200700; 21875182; 21534003; 51320105014; 2017‐skllmd‐06; NZ16084; DE‐AC02‐05CH11231

OSTI ID:: 1492484

Alternate ID(s):: OSTI ID: 1492486; OSTI ID: 1528784

Journal Information:: Advanced Science, Journal Name: Advanced Science Vol. 6 Journal Issue: 6; ISSN 2198-3844

Publisher:: WileyCopyright Statement

Country of Publication:: Germany

Language:: English

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Cited by: 22 works

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14 SOLAR ENERGY
binary solvent additives
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morphology
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Title: Fine Optimization of Morphology Evolution Kinetics with Binary Additives for Efficient Non‐Fullerene Organic Solar Cells

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