High-efficiency polymer solar cells enhanced by solvent treatment.
A significant enhancement of efficiency in thieno[3,4-b]-thiophene/benzodithiophene:[6,6]-phenyl C71-butyric acid methyl ester (PTB7:PC70 BM) solar cells can be achieved by methanol treatment. The effects of methanol treatment are shown in an improvement of built-in voltage, a decrease in series resistance, an enhanced charge-transport property, an accelerated and enlarged charge extraction, and a reduced charge recombination, which induce a simultaneous enhancement in open-circuit voltage (Voc), short-circuit current (Jsc), and fill factor (FF) in the devices.
Center for Polymers and Organic Solids, University of California, Santa Barbara, Santa Barbara, CA 93106, USA.
Huiqiong
H
Zhou
Yuan
Y
Zhang
Jason
J
Seifter
Samuel D
SD
Collins
Chan
C
Luo
Guillermo C
GC
Bazan
Thuc-Quyen
TQ
Nguyen
Alan J
AJ
Heeger
D011211:Electric Power Supplies; D037741:Fullerenes / Q000737:chemistry; D011108:Polymers / Q000737:chemistry*; D012993:Solar Energy; D012997:Solvents / Q000737:chemistry*
C539575:(6,6)-phenyl C61-butyric acid methyl ester; D037741:Fullerenes; D011108:Polymers; D012997:Solvents