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

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.

Authors:
 [1];  [1];  [1];  [2];  [1];  [3];  [4];  [2]; ORCiD logo [5]
  1. Xi’an Jiaotong Univ., Xi’an (China)
  2. Univ. of North Carolina, Chapel Hill, NC (United States)
  3. North Minzu Univ., Yinchuan (Chin)
  4. SLAC National Accelerator Lab., Menlo Park, CA (United States)
  5. Xi’an Jiaotong Univ., Xi’an (China); South China Univ. of Technology, Guangzhou (China)
Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); Natural Science foundation of Ningxia; Ministry Of Science and Technology
OSTI Identifier:
1492484
Alternate Identifier(s):
OSTI ID: 1492486; OSTI ID: 1528784
Grant/Contract Number:  
AC02-76SF00515; 2016YFA0200700; 21875182; 21534003; 51320105014; 2017‐skllmd‐06; NZ16084; DE‐AC02‐05CH11231; AC02‐05CH11231
Resource Type:
Published Article
Journal Name:
Advanced Science
Additional Journal Information:
Journal Volume: 6; Journal Issue: 6; Journal ID: ISSN 2198-3844
Publisher:
Wiley
Country of Publication:
United States
Language:
English
Subject:
14 SOLAR ENERGY; binary solvent additives; in situ characterization; kinetics; morphology; polymer solar cells

Citation Formats

Chen, Jianya, Bi, Zhaozhao, Xu, Xianbin, Zhang, Qianqian, Yang, Shengchun, Guo, Shengwei, Yan, Hongping, You, Wei, and Ma, Wei. Fine Optimization of Morphology Evolution Kinetics with Binary Additives for Efficient Non-Fullerene Organic Solar Cells. United States: N. p., 2019. Web. doi:10.1002/advs.201801560.
Chen, Jianya, Bi, Zhaozhao, Xu, Xianbin, Zhang, Qianqian, Yang, Shengchun, Guo, Shengwei, Yan, Hongping, You, Wei, & Ma, Wei. Fine Optimization of Morphology Evolution Kinetics with Binary Additives for Efficient Non-Fullerene Organic Solar Cells. United States. doi:10.1002/advs.201801560.
Chen, Jianya, Bi, Zhaozhao, Xu, Xianbin, Zhang, Qianqian, Yang, Shengchun, Guo, Shengwei, Yan, Hongping, You, Wei, and Ma, Wei. Mon . "Fine Optimization of Morphology Evolution Kinetics with Binary Additives for Efficient Non-Fullerene Organic Solar Cells". United States. doi:10.1002/advs.201801560.
@article{osti_1492484,
title = {Fine Optimization of Morphology Evolution Kinetics with Binary Additives for Efficient Non-Fullerene Organic Solar Cells},
author = {Chen, Jianya and Bi, Zhaozhao and Xu, Xianbin and Zhang, Qianqian and Yang, Shengchun and Guo, Shengwei and Yan, Hongping and You, Wei and Ma, Wei},
abstractNote = {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.},
doi = {10.1002/advs.201801560},
journal = {Advanced Science},
number = 6,
volume = 6,
place = {United States},
year = {2019},
month = {1}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1002/advs.201801560

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Cited by: 2 works
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Works referenced in this record:

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Polymer Photovoltaic Cells: Enhanced Efficiencies via a Network of Internal Donor-Acceptor Heterojunctions
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Efficiency enhancement in low-bandgap polymer solar cells by processing with alkane dithiols
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