Low band-gap conjugated polymers with strong interchain aggregation and very high hole mobility towards highly efficient thick-film polymer solar cells.
Absorption spectra of polymer FBT-Th4 (1,4) (M n = 46.4 Kg/mol, E g = 1.62 eV, and HOMO = -5.36 eV) indicate strong interchain aggregation ability. High hole mobilities up to 1.92 cm(2) (V s)(-1) are demonstrated in OFETs fabricated under mild conditions. Inverted solar cells with active layer thicknesses ranging from 100 to 440 nm display PCEs exceeding 6.5%, with the highest efficiency of 7.64% achieved with a 230 nm thick active layer.
Institute of Polymer Optoelectronic, Materials & Devices, State Key Laboratory of Luminescent Materials & Devices, South China University of Technology, Guangzhou, 510640, P. R. China.
Zhenhui
Z
Chen
Ping
P
Cai
Junwu
J
Chen
Xuncheng
X
Liu
Lianjie
L
Zhang
Linfeng
L
Lan
Junbiao
J
Peng
Yuguang
Y
Ma
Yong
Y
Cao
fluorinated conjugated polymers; interchain aggregation; inverted polymer solar cells; organic field-effect transistors