4.2 Article

Symmetry-Induced Orderly Assembly Achieving High-Performance Perylene Diimide-Based Nonfullerene Organic Solar Cells

Journal

CCS CHEMISTRY
Volume 3, Issue 8, Pages 78-84

Publisher

CHINESE CHEMICAL SOC
DOI: 10.31635/ccschem.020.202000538

Keywords

perylene diimide; small molecule acceptors; organic solar cells; molecule assembly

Funding

  1. National Natural Science Foundation of China (NSFC) [21734009, 21790361]
  2. Shen Zhen Technology and Innovation Commission [JCYJ20170413173814007, JCYJ20170818113905024]
  3. Hong Kong Research Grants Council [R6021-18, 16305915, 16322416, 606012, 16303917]
  4. Guangdong Major Project of Basic and Applied Basic Research [2019B 030302007]
  5. Hong Kong Innovation and Technology Commission [ITC-CNERC14SC01, ITS/471/18]

Ask authors/readers for more resources

Controllable assembly of organic semiconductors has led to a significant improvement in performance, with isomeric CRP acceptors displaying different assembly framework structures and achieving high efficiency. This study highlights the importance of designing high-performance organic semiconductors with symmetric orderly assembly.
Controllable assembly of organic semiconductors has opened an avenue for an in-depth perception of their structure-property relationships; however, a detailed investigation of their molecular controllability remains challenging. Discerning the assembly of organic semiconductors could enable the attainment of a significant improvement of performance. Here, we report the fabrication of efficient nonfullerene organic solar cells (OSCs) based on two isomeric perylene diimide (PDI)-fused corannulene acceptors, namely, corannurylene pentapetalae (CRP). A single-crystal analysis demonstrated that differentially symmetric isomers such as CRP-1 and CRP-2 display various assembly framework structures. Both isomeric CRP acceptor-based solar cells showed excellent power conversion efficiencies matching a medium bandgap polymer donor (P3TEA). Compared with CRP-2, a high symmetry-induced orderly assembly endowed CRP-1 with a higher efficiency of 11.2%, which is the maximum performance of PDI-based OSCs reported to date. This study sheds light on designing high-performance organic semiconductors allowing for symmetric orderly assembly. [GRAPHICS] .

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