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2025 Vol.13, Issue 1 Preview Page
Organic Solar Cells Based on Asymmetric Octacyclic Fused Non-Fullerene Acceptors
Sabeen Zahra12
,
Du Hyeon Ryu13
,
Muhammad Haris12
,
Chang Eun Song12
,
Hang Ken Lee12
,
Sang Kyu Lee12
,
Seungjin Lee1*
,
Won Suk Shin12**
1Photoenergy Research Center, Korea Research Institute of Chemical Technology (KRICT), Daejeon, 34114, Korea
2Advanced Materials and Chemical Engineering, University of Science and Technology (UST), Daejeon, 34113, Korea
3Department of Chemical and Biological Engineering, Korea University, Seoul, 02855, Korea
*Corresponding Author
**Corresponding Author
31 March 2025. pp. 16-24
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Abstract

Y6-based non-fullerene acceptors (NFAs) have garnered significant attention. Nevertheless, the effects of asymmetric modification on their photovoltaic properties remain poorly understood. In this study, we employed skeleton modification tactics to optimize the asymmetric OCPDTBT, a Y6-based NFA. In this study, we develop a novel series of asymmetric A-DA'D-A type octacyclic NFAs featuring a cyclopentadithiophene (CPDT) donor core, fused benzothiadiazole (BT), and IC-2F end groups. These molecular modifications result in red-shifted and broader absorption, extending the absorption onset to ~988 nm. Furthermore, side-chain modifications were made to optimize the electronic and structural properties of these NFAs. Our study reveals that blending a PM6 polymer donor with one of the modified NFAs, namely OCPDTBT-HD, achieved an impressive PCE of 13.47%, a short-circuit current density (JSC) of 24.17 mA cm-2, and a fill factor (FF) of 71%. The study highlights the potential of CPDT-based NFAs for advancing OSC performance, particularly in environmentally friendly processing. Furthermore, this work underscores the importance of structural optimization in developing next-generation solar materials designed to absorb near-infrared wavelengths.

Keywords
Organic solar cell
Non-fullerene acceptors
Cyclopentadithiophene (CPDT)
Alky chain modifications
Environmentally friendly processing
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Information
  • Publisher :Korea Photovoltaic Society
  • Publisher(Ko) :한국태양광발전학회
  • Journal Title :Current Photovoltaic Research
  • Volume : 13
  • No :1
  • Pages :16-24
  • Received Date : 2024-12-12
  • Accepted Date : 2025-01-17
  • DOI :https://doi.org/10.21218/CPR.2025.13.1.016
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