A strategy of designing near-infrared porphyrin-based non-fullerene acceptors for panchromatic organic solar cells

Wei Chih Wang, You Wei Lin, Shih Hao Peng, Chih Ting Chuang, Chia-Chih Chang, Chain-Shu Hsu*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

Two porphyrin-based non-fullerene acceptors (NFAs), PORTIC and PORTFIC, were synthesized to enable panchromatic absorption for high performance organic solar cells (OSCs). An inverted organic solar cell architecture of ITO/ZnO/PTB7-Th:Porphyrin-based NFAs/MoO3/Ag is used. With pyridine as an additive of which further affords optimum morphology for charge separation transport, the power conversion efficiency (PCE) was improved by 40.4% and 67.8% for PORTIC and PORTFIC, respectively, relative to devices fabricated without pyridine. Two-dimensional (2D) grazing-incidence wide-angle X-ray scattering (GIWAXS) shows that the optimized active layer exhibits face-on orientation. Moreover, the photoluminescence quenching experiments reveal that more effective charge transfer between the donor and acceptor is achieved upon addition of pyridine. PTB7-Th:PORTFIC device affords a VOC of 0.74 V, a JSC of 11.27 mA cm−2, a FF of 51.29% and highest PCE of 4.28%.

Original languageEnglish
Article number105899
JournalOrganic Electronics
Volume86
DOIs
StatePublished - Nov 2020

Keywords

  • Non-fullerene acceptors
  • Organic solar cells
  • Panchromatic absorption and binary bulk heterojunctions
  • Porphyrins

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