Using mixed solvent and changing spin-coating parameters to increase the efficiency and lifetime of organic solar cells.
The derivative of C60, i.e., PCBM, and P3HT (3-hexylthiophene) were dissolved in chloroform:dichlorobenzene mixed solvent, then spin-coated as the active layer for organic solar cells (OSC). The experimental parameters were studied carefully to obtain the optimum power conversion efficiency (PCE), including the solvent mixing ratio, spin-coating speed, annealing conditions for the active layer, etc. The OSC devices were packaged with glass and a newly developed UV-glue to improve the lifetime and PCE. Dichlorobenzene solvent has great effect upon the PCE. Changing the spin-coating speed and increasing the number of steps increased the PCE apparently to 1.4%.
Tsai
Yu Sheng
YS
Institute of Electro-Optical and Materials Science, National Formosa University, Huwei, Yunlin 63208, Taiwan.
Chu
Wei-Ping
WP
Tang
Rong-Ming
RM
Juang
Fuh-Shyang
FS
Chang
Ming-Hua
MH
Liu
Mark O
MO
Hsieh
Tsung-Eong
TE