Asymmetrical squaraines for high-performance small-molecule organic solar cells with a short circuit current of over 12 mA cm(-2).
An asymmetrical squaraine dye (Py-3) with its two electron-donating aryl groups directly linked to the electron-withdrawing squaric acid core possesses an ideal bandgap of 1.33 eV, together with an intense and broad absorption band in the range 550-950 nm. Hence, the resulting solution-processed solar cells display an impressive Jsc of 12.03 mA cm(-2) and a PCE of 4.35%.
Key Laboratory of Green Chemistry and Technology (Ministry of Education), College of Chemistry, Sichuan University, Chengdu 610064, P. R. China. huangyan@scu.edu.cn luzhiyun@scu.edu.cn.
Yao
Y
Chen
Youqin
Y
Zhu
Daobin
D
Yang
Qian
Q
Luo
Lin
L
Yang
Yan
Y
Huang
Suling
S
Zhao
Zhiyun
Z
Lu