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Title: A 3D nonfullerene electron acceptor with a 9,9'-bicarbazole backbone for high-efficiency organic solar cells

Abstract

One-dimensional ladder-type nonfullerene electron acceptors (NFAs) with large fused ring cores have been typically used in highly efficient organic solar cells (OSCs). Prior studies have demonstrated that small molecule acceptors with three-dimensional (3D) structures may exhibit low energy loss, and hence can lead to improved OSC performance. In this study, a new 3D NFA (99CZ-8F) with a 9,9'-bicarbazole backbone was designed, synthesized, and characterized, where two linear A-D-A architectures were linked by a single N–N bond. 99CZ-8F showed strong absorption in the range of 500–800 nm in the solid state, which is complementary to the absorption of the donor material PM6. After regulating the morphology of the active layer via binary solvent mixture, the optimized device exhibited a maximum power conversion efficiency (PCE) of 6.6 ± 0.1%, which is among the best reported values for 3D nonfullerene electron acceptor based OSCs

Authors:
 [1]; ORCiD logo [2];  [1];  [2]; ORCiD logo [3];  [4];  [5]; ORCiD logo [2];  [1]
  1. Soochow Univ. (China)
  2. Univ. of Michigan, Ann Arbor, MI (United States)
  3. Tianjin Univ. (China)
  4. Tianjin Univ. (China); North Carolina State Univ., Raleigh, NC (United States)
  5. North Carolina State Univ., Raleigh, NC (United States)
Publication Date:
Research Org.:
Univ. of Michigan, Ann Arbor, MI (United States); Univ. of California, Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Solar Energy Technologies Office; National Key Research and Development Program of China; National Natural Science Foundation of China (NSFC); US Department of the Navy, Office of Naval Research (ONR)
OSTI Identifier:
1630435
Alternate Identifier(s):
OSTI ID: 1694217
Grant/Contract Number:  
EE0008561; N00014-17-1-2211; AC02-05CH11231
Resource Type:
Accepted Manuscript
Journal Name:
Organic Electronics
Additional Journal Information:
Journal Volume: 84; Journal Issue: C; Journal ID: ISSN 1566-1199
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
14 SOLAR ENERGY; Organic solar cells; nonfullerene electron acceptor; 3D molecular structure; bicarbazole; end-capped groups

Citation Formats

Chao, Jiang, Huang, Xinjing, Sun, Bangjin, Li, Yongxi, Gao, Mengyuan, Ye, Long, Ade, Harald, Forrest, Stephen, and Fan, Jian. A 3D nonfullerene electron acceptor with a 9,9'-bicarbazole backbone for high-efficiency organic solar cells. United States: N. p., 2020. Web. doi:10.1016/j.orgel.2020.105784.
Chao, Jiang, Huang, Xinjing, Sun, Bangjin, Li, Yongxi, Gao, Mengyuan, Ye, Long, Ade, Harald, Forrest, Stephen, & Fan, Jian. A 3D nonfullerene electron acceptor with a 9,9'-bicarbazole backbone for high-efficiency organic solar cells. United States. https://doi.org/10.1016/j.orgel.2020.105784
Chao, Jiang, Huang, Xinjing, Sun, Bangjin, Li, Yongxi, Gao, Mengyuan, Ye, Long, Ade, Harald, Forrest, Stephen, and Fan, Jian. Tue . "A 3D nonfullerene electron acceptor with a 9,9'-bicarbazole backbone for high-efficiency organic solar cells". United States. https://doi.org/10.1016/j.orgel.2020.105784. https://www.osti.gov/servlets/purl/1630435.
@article{osti_1630435,
title = {A 3D nonfullerene electron acceptor with a 9,9'-bicarbazole backbone for high-efficiency organic solar cells},
author = {Chao, Jiang and Huang, Xinjing and Sun, Bangjin and Li, Yongxi and Gao, Mengyuan and Ye, Long and Ade, Harald and Forrest, Stephen and Fan, Jian},
abstractNote = {One-dimensional ladder-type nonfullerene electron acceptors (NFAs) with large fused ring cores have been typically used in highly efficient organic solar cells (OSCs). Prior studies have demonstrated that small molecule acceptors with three-dimensional (3D) structures may exhibit low energy loss, and hence can lead to improved OSC performance. In this study, a new 3D NFA (99CZ-8F) with a 9,9'-bicarbazole backbone was designed, synthesized, and characterized, where two linear A-D-A architectures were linked by a single N–N bond. 99CZ-8F showed strong absorption in the range of 500–800 nm in the solid state, which is complementary to the absorption of the donor material PM6. After regulating the morphology of the active layer via binary solvent mixture, the optimized device exhibited a maximum power conversion efficiency (PCE) of 6.6 ± 0.1%, which is among the best reported values for 3D nonfullerene electron acceptor based OSCs},
doi = {10.1016/j.orgel.2020.105784},
journal = {Organic Electronics},
number = C,
volume = 84,
place = {United States},
year = {Tue Apr 21 00:00:00 EDT 2020},
month = {Tue Apr 21 00:00:00 EDT 2020}
}

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