Premium
Development of New Two‐Dimensional Small Molecules Based on Benzodifuran for Efficient Organic Solar Cells
Author(s) -
Du Zhengkun,
Chen Yanhua,
Chen Weichao,
Qiao Shanlin,
Wen Shuguang,
Liu Qian,
Zhu Dangqiang,
Sun Mingliang,
Yang Renqiang
Publication year - 2014
Publication title -
chemistry – an asian journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.18
H-Index - 106
eISSN - 1861-471X
pISSN - 1861-4728
DOI - 10.1002/asia.201402467
Subject(s) - chlorobenzene , organic solar cell , moiety , energy conversion efficiency , crystallinity , solubility , thermal decomposition , materials science , thermal stability , molecule , absorption (acoustics) , decomposition , toluene , polymer solar cell , chemical engineering , small molecule , chemistry , organic chemistry , polymer , optoelectronics , catalysis , biochemistry , composite material , engineering
A new organic small molecule, DCA3TBDF, with a 2D benzo[1,2‐ b :4,5‐ b ′]difuran (BDF) moiety as the central core and octyl cyanoacetate units as the end‐capped blocks, was designed and synthesized for solution‐processed bulk heterojunction solar cells. DCA3TBDF possesses good solubility in common organic solvents such as toluene, CH 2 Cl 2 , chlorobenzene, and CHCl 3 and good thermal stability with an onset decomposition temperature with 5 % weight‐loss occurring at 361 °C. The DCA3TBDF thin film showed a broad absorption at λ =320–700 nm and high crystallinity. Small‐molecule organic solar cells based on DCA3TBDF and [6,6]‐phenyl‐C 61 ‐butyric acid methyl ester demonstrated promising power conversion efficiency with a high fill factor under the illumination of AM 1.5G (100 mW cm −2 ).