The influence of polarity of electrodeposited Cu2O thin films on the photoelectrochemical performance

被引：0

作者：

Kim, Misung ^{[1
,2
]}

Yoon, Sanghwa ^{[3
]}

Jung, Hyunsung ^{[4
]}

Lee, Kun-Jae ^{[5
]}

Lim, Dong-Chan ^{[1
]}

Kim, In-Soo ^{[2
]}

Yoo, Bongyoung ^{[3
]}

Lim, Jae-Hong ^{[1
]}

机构：

[1] Korea Inst Mat Sci, Surface Technol Div, Elect Res Grp, Chang Won 641831, South Korea

[2] Dong A Univ, Dept Met Engn, Pusan 426791, South Korea

[3] Hanyang Univ, Dept Mat Engn, Ansan 604714, Gyeonggi, South Korea

[4] Korea Inst Ceram Engn & Technol, Adv Mat Convergence Div, Seoul 153801, South Korea

[5] Inst Adv Engn, Adv Mat Proc Ctr, Yongin 449863, Gyeonggi, South Korea

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS | 2014年 / 53卷 / 08期

基金：

新加坡国家研究基金会;

关键词：

CUPROUS-OXIDE; SHAPE CONTROL; SOLAR-CELL; REDUCTION;

D O I：

10.7567/JJAP.53.08NJ01

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Both polar and non-polar Cu2O thin films were electrodeposited in electrolytes of different pH, and their photoelectrochemical activities in water were analyzed. The surface morphology of these tailored-polarity Cu2O films was analyzed by field emission scanning electron microscope (FE-SEM) and X-ray diffraction (XRD), and their photoactivity was characterized through photoluminescence and Mott-Schottky measurement of the defect structure, diffusion length, carrier concentration, and charge separation. Through this, the tetrahedral surface morphology of a polar Cu2O thin film was found to exhibit a higher photocurrent in the visible spectrum than the pyramidal surface morphology of a non-polar Cu2O film. Furthermore, the higher flat-band potential and carrier concentration identified in the polar Cu2O by Mott-Schottky analysis was found to result in a higher charge separation. (C) 2014 The Japan Society of Applied Physics

引用

页数：4

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