Ga-doped ZnO transparent electrodes with TiO2 blocking layer/nanoparticles for dye-sensitized solar cells.
Ga-doped ZnO [GZO] thin films were employed for the transparent electrodes in dye-sensitized solar cells [DSSCs]. The electrical property of the deposited GZO films was as good as that of commercially used fluorine-doped tin oxide [FTO]. In order to protect the GZO and enhance the photovoltaic properties, a TiO2 blocking layer was deposited on the GZO surface. Then, TiO2 nanoparticles were coated on the blocking layer, and dye was attached for the fabrication of DSSCs. The fabricated DSSCs with the GZO/TiO2 glasses showed an enhanced conversion efficiency of 4.02% compared to the devices with the normal GZO glasses (3.36%). Furthermore, they showed better characteristics even than those using the FTO glasses, which can be attributed to the reduced charge recombination and series resistance.
Department of Electrical Engineering, Korea University, 5-1 Anam-dong, Seongbuk-gu, Seoul, 136-713, South Korea. byungmoo@korea.ac.kr.
Ji-Hong
JH
Kim
Kyung-Ju
KJ
Lee
Ji-Hyung
JH
Roh
Sang-Woo
SW
Song
Jae-Ho
JH
Park
In-Hyung
IH
Yer
Byung-Moo
BM
Moon