A Simple Building Block with Noncovalently Conformational Locks towards Constructing Low-Cost and High-Performance Nonfused Ring Electron Acceptors

Xiao-Bin Gu; Jin-Hua Gao; Zi-Yang Han; Yu-Hao Shi; Ya-Nan Wei; Yin-Cheng Zhang; Qian Peng; Zhi-Xiang Wei; Xin Zhang; Hui Huang

doi:10.1007/s10118-022-2888-9

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A Simple Building Block with Noncovalently Conformational Locks towards Constructing Low-Cost and High-Performance Nonfused Ring Electron Acceptors

RESEARCH ARTICLE | Updated：2023-03-07

- A Simple Building Block with Noncovalently Conformational Locks towards Constructing Low-Cost and High-Performance Nonfused Ring Electron Acceptors
- Chinese Journal of Polymer Science Vol. 41, Issue 4, Pages: 556-563(2023)
- Affiliations：
  
  a.College of Materials Science and Opto-Electronic Technology, Center of Materials Science and Optoelectronics Engineering, CAS Center for Excellence in Topological Quantum Computation, CAS Key Laboratory of Vacuum Physics, University of Chinese Academy of Sciences, Beijing 100049, China
  b.School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
  c.CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, China
- Author bio：
  
  zhangxin2019@ucas.ac.cn (X.Z.)
  huihuang@ucas.ac.cn (H.H.)
- Funds：
- DOI：10.1007/s10118-022-2888-9
  CLC：
- Received：07 September 2022，
  
  Revised：2022-10-10，
  
  Accepted：17 October 2022，
  
  Online First：03 November 2022，
  
  Published：01 April 2023
- Accepted：
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Gu, X. B.; Gao, J. H.; Han, Z. Y.; Shi, Y. H.; Wei, Y. N.; Zhang, Y. C.; Peng, Q.; Wei, Z. X.; Zhang, X.; Huang, H. A simple building block with noncovalently conformational locks towards constructing low-cost and high-performance nonfused ring electron acceptors. Chinese J. Polym. Sci. 2023, 41, 556–563

Xiao-Bin Gu, Jin-Hua Gao, Zi-Yang Han, et al. A Simple Building Block with Noncovalently Conformational Locks towards Constructing Low-Cost and High-Performance Nonfused Ring Electron Acceptors[J]. Chinese Journal of Polymer Science, 2023, 41(4): 556-563.
Gu, X. B.; Gao, J. H.; Han, Z. Y.; Shi, Y. H.; Wei, Y. N.; Zhang, Y. C.; Peng, Q.; Wei, Z. X.; Zhang, X.; Huang, H. A simple building block with noncovalently conformational locks towards constructing low-cost and high-performance nonfused ring electron acceptors. Chinese J. Polym. Sci. 2023, 41, 556–563 DOI： 10.1007/s10118-022-2888-9.

Xiao-Bin Gu, Jin-Hua Gao, Zi-Yang Han, et al. A Simple Building Block with Noncovalently Conformational Locks towards Constructing Low-Cost and High-Performance Nonfused Ring Electron Acceptors[J]. Chinese Journal of Polymer Science, 2023, 41(4): 556-563. DOI： 10.1007/s10118-022-2888-9.

摘要

In this work

a simple building block (POBT) based on bithiophene was designed and synthesized

which could be regarded as tailoring from the fused-ring CPT unit. Two novel NFREAs based on CPT and POBT were developed

and PBDB-T:TT-POBT based PSC devices showed a much better PCE than the TT-CPT counterpart.

Abstract

Nonfused ring electron acceptors (NFREAs) have attracted much attention due to their concise synthetic routes and low cost. However

developing high-performance NFREAs with simple structure remains a great challenge. In this work

a simple building block (POBT) with noncovalently conformational locks (NoCLs) was designed and synthesized. Single-crystal X-ray study indicated the presence of S···O NOCLs in POBT

thus enabling it to possess a coplanar conformation comparable to that of fused-ring CPT. Two novel NFREAs based on CPT and POBT were developed

namely

TT-CPT

and

TT-POBT

respectively. Besides

TT-POBT

possessed a smaller Stokes shift and a reduced reorganization energy compared with

TT-CPT

indicating the introduction of S···O NoCLs can enhance the molecular rigidity even if simplifying the molecular structure. As a result

the

TT-POBT

-based PSC device afforded an impressive power conversion efficiency of 11.15%

much higher than that of

TT-CPT

counterpart (7.03%)

mainly resulting from the tighter

stacking

improved and balanced charge transport

and more favorable film morphology. This work demonstrates the potential of the simple building block POBT with NoCLs towards constructing low-cost and high-performance NFREAs.

关键词

Keywords

references

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