DataVXAdvanced SciencePaper
journal article·2019-03Open access

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

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

Advanced Science· Volume 6· Issue 6
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Source abstract

Abstract

Abstract 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 context

Polymers

OpenAlex topics: Organic Electronics and Photovoltaics · Conducting polymers and applications · Thin-Film Transistor Technologies

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

State Key Laboratory for Mechanical Behavior of Materials Xi'an Jiaotong University Xi'an 710049 China

School of Science MOE Key Laboratory for Non‐equilibrium Synthesis and Modulation of Condensed Matter Xi'an Jiaotong University Xi'an 710049 China

Department of Chemistry University of North Carolina at Chapel Hill Chapel Hill NC 27599 USA

College of Materials Science and Engineering North Minzu University Yinchuan 750021 China

SLAC National Accelerator Laboratory Menlo Park CA 94025 USA

State Key Laboratory of Luminescent Materials and Devices South China University of Technology Guangzhou 510640 China

Funding

Ministry of Science and Technology · National Natural Science Foundation of China · State Key Laboratory of Luminescent Materials and Devices · Natural Science Foundation of Ningxia Province · U.S. Department of Energy

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