Water/Alcohol-Soluble Conjugated Polymers Based on Cyclopentadithiophene and Fluorene as Cathode Interlayers Elevate the Stability and Efficiency in Organic Solar Cells

In high-performance bulk heterojunction organic solar cells (BHJ OSCs), cathode interlayers (CILs) have been effective in enhancing the device stability and photovoltaic performance by reducing the electron traps of ZnO layers. In this work, three water/alcohol-soluble conjugated polyelectrolytes (C...

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Bibliographic Details
Published inACS applied energy materials Vol. 5; no. 8; pp. 9495 - 9502
Main Authors Nie, Hebing, Huang, Sheng-Ci, Lai, Cheng-Yao, Busireddy, Manohar Reddy, Su, Yi-Jia, Chen, Tsung-Wei, Kuo, Pei-Jung, Chen, Jiun-Tai, Hsu, Chain-Shu
Format Journal Article
LanguageEnglish
Published American Chemical Society 22.08.2022
Subjects
cathode interfacial layer
inverted device architecture
non-fullerene acceptors
conjugated polymer electrolytes
BHJ OSCs
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Summary:In high-performance bulk heterojunction organic solar cells (BHJ OSCs), cathode interlayers (CILs) have been effective in enhancing the device stability and photovoltaic performance by reducing the electron traps of ZnO layers. In this work, three water/alcohol-soluble conjugated polyelectrolytes (CPEs), P2T-CDTNa, PC-CDTNa, and PNDIT-FNa, as cathode interlayers (CILs) are reported. The effect of these three CPEs is validated by using PBDB-T:ITIC and PM6:Y6 as photoactive blends. Compared with ZnO-only devices, all three ZnO/CPE-based devices demonstrate enhanced photovoltaic performances. Especially, the ZnO/P2T-CDTNa-based devices show impressive power conversion efficiencies (PCEs) of 9.93% (V OC = 0.87 V, J SC = 16.56 mA/cm2, and FF = 69.04%) and 16.15% (V OC = 0.84 V, J SC = 27.71 mA/cm2, and FF = 69.60%) for PBDB-T:ITIC and PM6:Y6 BHJ photoactive blends, respectively.
ISSN:2574-0962
2574-0962
DOI:10.1021/acsaem.2c01107