Effects of the Thickness and Dopant on the Photoelectro- chemical Conversion in the Polycrystalline <TEX>$TiO_2$</TEX> Electrodes

,; ,; ,; ,

J. Korean Ceram. Soc. > Volume 21(3); 1984 > Article

Journal of the Korean Ceramic Society 1984;21(3): 266.

광전기 화학변환에 미치는 $TiO_2$ 전극의 두께와 첨가제의 영향

윤기현, 강동헌

연세대학교 요업공학과

Effects of the Thickness and Dopant on the Photoelectro- chemical Conversion in the Polycrystalline $TiO_2$ Electrodes

ABSTRACT

The photoelectrochemical properties of the reduced $TiO_2$ceramic electrodes are investigated varying the thickness of the electrodes and the amounts of $Sb_2O_3$ as dopant. As the thickness of the undoped. $TiO_2$ceramic electrode increases the photocurrent tends to decrease. However for the R-F sputtered $TiO_2$ thin film electrodes the photocurrent tends to increase to about 1$mutextrm{m}$ thick and then decreases with increasing thickness. For the $TiO_2$ ceramic electrodes doped with $Sb_2O_3$ the photocurrent decreases with inreasing the amounts of dopant and in the case of rapid cooling in air without reduction treatment the photocurrent shows lower value. Also visible light excitation is observed at 500~550(nm) wavelength for the $TiO_2$ ceramic electrodes doped with $Sb_2O_3$comparing wtih the $TiO_2$ ceramic electrodes (~420nm)