A Near-Infrared Polymer Acceptor Enables over 15% Efficiency for All-Polymer Solar Cells

Tao Wang; Rui Sun; Xin-Rong Yang; Yao Wu; Wei Wang; Qian Li; Chun-Feng Zhang; Jie Min

doi:10.1007/s10118-022-2697-1

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A Near-Infrared Polymer Acceptor Enables over 15% Efficiency for All-Polymer Solar Cells

RESEARCH ARTICLE | Updated：2022-07-21

- A Near-Infrared Polymer Acceptor Enables over 15% Efficiency for All-Polymer Solar Cells
- A Near-Infrared Polymer Acceptor Enables over 15% Efficiency for All-Polymer Solar Cells
- Chinese Journal of Polymer Science 2022年40卷第8期页码：877-888
- Affiliations：
  
  a.The Institute for Advanced Studies, Wuhan University, Wuhan 430072, China
  b.National Laboratory of Solid State Microstructures, School of Physics, and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China
  c.Beijing National Laboratory for Molecular Sciences, Beijing 100190, China
  d.Key Laboratory of Materials Processing and Mold (Zhengzhou University), Ministry of Education, Zhengzhou 450002, China
- Author bio：
  
  min.jie@whu.edu.cn
- Funds：
  
  This work was financially supported by the National Natural Science Foundation of China (Nos. 21702154 and 51773157). We also thank the support of the opening project of Key Laboratory of Materials Processing and Mold and Beijing National Laboratory for Molecular Sciences (No. BNLMS201905).
- DOI：10.1007/s10118-022-2697-1
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Tao Wang, Rui Sun, Xin-Rong Yang, 等. A Near-Infrared Polymer Acceptor Enables over 15% Efficiency for All-Polymer Solar Cells[J]. Chinese Journal of Polymer Science, 2022,40(8):877-888.

Tao Wang, Rui Sun, Xin-Rong Yang, et al. A Near-Infrared Polymer Acceptor Enables over 15% Efficiency for All-Polymer Solar Cells[J]. Chinese Journal of Polymer Science, 2022,40(8):877-888.
Tao Wang, Rui Sun, Xin-Rong Yang, 等. A Near-Infrared Polymer Acceptor Enables over 15% Efficiency for All-Polymer Solar Cells[J]. Chinese Journal of Polymer Science, 2022,40(8):877-888. DOI： 10.1007/s10118-022-2697-1.

Tao Wang, Rui Sun, Xin-Rong Yang, et al. A Near-Infrared Polymer Acceptor Enables over 15% Efficiency for All-Polymer Solar Cells[J]. Chinese Journal of Polymer Science, 2022,40(8):877-888. DOI： 10.1007/s10118-022-2697-1.

摘要

We synthesized a new PA PYT-Tz with fused-ring benzotriazole (BTz)-based A’-DAD-A’ structure as electron-deficient-core, n-nonane as alkyl-side-chain and thiophene as π-bridge. PYT-Tz showed significantly red-shifted absorption and up-shifted LUMO level compared with PYT due to the less electron-deficient property of BTz unit, leading to a high PCE of 15.10%.

Abstract

Finding effective molecular design strategies to enable efficient charge generation, high charge transport, and small energy loss is a longstanding challenge for developing high-performance all-polymer solar cells (all-PSCs). Here, we designed and synthesized a fused-aromatic-ring-constructed near-infrared (NIR) polymer acceptor (P,A,) PYT-Tz with fused-ring benzotriazole (BTz)-based A’-DAD-A’ structure as electron-deficient-core,n,-nonane as alkyl-side-chain and thiophene as ,π,-bridge, and achieved a power conversion efficiency (PCE) of 15.10% for the all-PSCs with PYT-Tz as acceptor and a wide-bandgap PBDB-T as donor. A control P,A, PYT reported by our lab recently was introduced for investigating the synergistic effect of the electron-deficient-core and alkyl-side-chain on the optoelectronic properties and photovoltaic performance of the ,n,-type P,A,s. Compared with PYT, the designed PYT-Tz exhibits intense and red-shifted absorption, upshifted energy levels, high electron mobility and ordered molecular packing in the active layers, and, blended with PBDB-T, yields the efficient hole injection, ultrafast charge generation, and the decreased non-radiative recombination loss of 0.17 eV. Of note is that the PCE of 15.10% is one of the highest PCE values for an all-PSC reported to date. Our results indicate BTz-based fused-aromatic-ring-constructed P,A,s are promising NIR acceptors in the all-PSCs.

关键词

Keywords

Benzotriazole-based A’-DAD-A’ structureNear-infrared polymer acceptorHigh-performance all-polymer solar cells

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