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Effect of the Molecular Configuration of Perylene Diimide Acceptors on Charge Transfer and Device Performance

Journal Article · · ACS Applied Energy Materials
 [1];  [1];  [1];  [1];  [2];  [1];  [3];  [1]
  1. Southern Univ. of Science and Technology, Shenzhen (People's Republic of China)
  2. Department of Chemistry, Southern University of Science and Technology, Shenzhen 518055, P. R. China
  3. Argonne National Lab. (ANL), Lemont, IL (United States); The Univ. of Chicago, Chicago, IL (United States)

Three perylene diimides (PDI)-based small molecules, T2-SePDI2, T3B-SePDI3, and T4B-SePDI4, with different molecular configurations are synthesized. Due to a large steric hindrance, the molecular configuration of T3B-SePDI3 is the most distorted, followed by T4BSePDI4, while T2-SePDI2 shows the smallest steric hindrance. Inverted bulk heterojunction solar cells based on T3B-SePDI3 and PBDB-T show the highest power conversion efficiency (PCE) of 5.82% with an open-circuit voltage of 0.98 V, a high short-circuit current density of 10.52 mA/cm2, and a fill factor of 56.31%. The PCEs of the T2-SePDI2- and T4B-SePDI4- based devices are 4.10% and 5.10%, respectively. Furthermore, the results demonstrate that the molecular configuration of the PDI-based small molecule acceptor is critical and that increasing the steric hindrance is helpful in suppressing aggregation and improving device performance.

Research Organization:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division; National Natural Science Foundation of China
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1440754
Journal Information:
ACS Applied Energy Materials, Journal Name: ACS Applied Energy Materials Journal Issue: 2 Vol. 1; ISSN 2574-0962
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English

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Cited By (4)

Self-assembly behaviors of perylene- and naphthalene-crown macrocycle conjugates in aqueous medium journal January 2019
Isomeric Effect on Optoelectronic Properties and Photovoltaic Performance of Anthraquinone‐Core Perylene Diimide (PDI) and Helical PDI dimers journal August 2019
π-Extension improves the photovoltaic performance: a helical perylene diimide oligomer based three-dimensional non-fullerene acceptor journal January 2019
Ring fusion attenuates the device performance: star-shaped long helical perylene diimide based non-fullerene acceptors journal January 2019

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