Nonfullerene acceptors based on extended fused rings flanked with benzothiadiazolylmethylenemalononitrile for polymer solar cells

Autor:	Wei Ma, Xiaowei Zhan, Yao Wu, Yifan Wang, Jiayu Wang, Rong Li, Mingyu Zhang, Huitao Bai, Pei Cheng, Yang Wu
Rok vydání:	2015
Předmět:	chemistry.chemical_classification Renewable Energy Sustainability and the Environment Chemistry General Chemistry Polymer Electron acceptor Photochemistry Acceptor Polymer solar cell chemistry.chemical_compound Molecule General Materials Science Absorption (chemistry) HOMO/LUMO Malononitrile
Zdroj:	Journal of Materials Chemistry A. 3:20758-20766
ISSN:	2050-7496 2050-7488
Popis:	Two novel A–D–A type molecules IDT–2BM and IDTT–2BM with extended fused-ring indacenodithiophene (IDT) or indacenodithienothiophene (IDTT) units as cores and strong electron-withdrawing unit 2-(benzo[c][1,2,5]thiadiazol-4-ylmethylene)malononitrile (BM) as the end-capping group were synthesized and investigated as electron acceptors in solution-processed polymer solar cells (PSCs). IDT–2BM and IDTT–2BM exhibited strong and broad absorption from 300 to 800 nm, and appropriate LUMO (−3.8 eV) and HOMO (−5.5 to −5.6 eV) levels matching with the classical polymer donor PBDTTT-C-T. IDT–2BM and IDTT–2BM films exhibited intrinsic electron mobilities of about 3.7 × 10−6 and 1.0 × 10−5 cm2 V−1 s−1, respectively. Fullerene-free PSCs employing PBDTTT-C-T as the donor and IDT–2BM or IDTT–2BM as the acceptor afforded power conversion efficiencies of 4.26% and 4.81%, respectively.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::6965069861a216bc94ca020bd717dbf0 https://doi.org/10.1039/c5ta05901a Zobrazit plný text záznamu