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A Solution‐Processable Small Molecule Based on Benzodithiophene and Diketopyrrolopyrrole for High‐Performance Organic Solar Cells
Author(s) -
Lin Yuze,
Ma Lanchao,
Li Yongfang,
Liu Yunqi,
Zhu Daoben,
Zhan Xiaowei
Publication year - 2013
Publication title -
advanced energy materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.08
H-Index - 220
eISSN - 1614-6840
pISSN - 1614-6832
DOI - 10.1002/aenm.201300181
Subject(s) - materials science , small molecule , organic solar cell , band gap , energy conversion efficiency , molecule , absorption (acoustics) , matching (statistics) , nanotechnology , combinatorial chemistry , optoelectronics , polymer , organic chemistry , chemistry , biochemistry , statistics , mathematics , composite material
A linear solution‐processable small molecule (BDT‐2DPP) based on 5‐alkylthiophene‐2‐yl‐substituted benzodithiophene and diketopyrrolopyrrole is designed and synthesized. BDT‐2DPP exhibits strong and broad absorption with low band gap, low lying energy levels matching with PC 61 BM and high hole mobility. Solution‐processed organic solar cells based on BDT‐2DPP:PC 61 BM blend showed power conversion efficiencies as high as 5.79%.