Effects on Organic Photovoltaics Using Femtosecond-Laser-Treated Indium Tin Oxides.
The effects of femtosecond-laser-induced periodic surface structures (LIPSS) on an indium tin oxide (ITO) surface applied to an organic photovoltaic (OPV) system were investigated. The modifications of ITO induced by LIPPS in OPV devices result in more than 14% increase in power conversion efficiency (PCE) and short-circuit current density relative to those of the standard device. The basic mechanisms for the enhanced short-circuit current density are attributed to better light harvesting, increased scattering effects, and more efficient charge collection between the ITO and photoactive layers. Results show that higher PCEs would be achieved by laser-pulse-treated electrodes.
Department of Optoelectronic Engineering, National Dong Hwa University , Hualien 974, Taiwan.
Mei-Hsin
MH
Chen
Department of Electrophysics, National Chiao Tung University , Hsinchu 300 Taiwan.
Ya-Hsin
YH
Tseng
Department of Optoelectronic Engineering, National Dong Hwa University , Hualien 974, Taiwan.
Yi-Ping
YP
Chao
Department of Electrophysics, National Chiao Tung University , Hsinchu 300 Taiwan.
Sheng-Yang
SY
Tseng
Department of Optoelectronic Engineering, National Dong Hwa University , Hualien 974, Taiwan.
Zong-Rong
ZR
Lin
Department of Electrophysics, National Chiao Tung University , Hsinchu 300 Taiwan.
Hui-Hsin
HH
Chu
Graduate Institute of Photonics and Optoelectronics, National Taiwan University , Taipei 106, Taiwan.
Jan-Kai
JK
Chang
Department of Electrophysics, National Chiao Tung University , Hsinchu 300 Taiwan.
Chih-Wei
CW
Luo
P3HT:PCBM; femtosecond lasers pulses; laser-treated ITO; organic photovoltaics; scattering effect; ultraviolet photoemission spectroscopy