Effective Photocurrent Enhancement in Nanostructured CuO by Organic Dye Sensitization: Studies on Charge Transfer Kinetics

被引：17
作者：
Marathey, Priyanka [1 ]
Pati, Ranjan K. [1 ]
Mukhopadhyay, Indrajit [1 ]
Ray, Abhijit [1 ]
机构：
[1] Pandit Deendayal Petr Univ, Dept Solar Energy, Solar Res & Dev Ctr, Gandhinagar 382007, Gujarat, India
来源：
JOURNAL OF PHYSICAL CHEMISTRY C | 2018年 / 122卷 / 07期
关键词：
CONSTANT PHASE ELEMENT; SOLAR-CELLS; SEMICONDUCTOR ELECTRODES; TIO2; ELECTRODES; DOPED TIO2; CONVERSION; OXIDE; LIGHT; WATER; PHOTOCATHODE;
D O I：
10.1021/acs.jpcc.7b10024
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Mercurochrome-sensitized nanostructured CuO grown directly on Cu has been used as efficient photocathode in photoelectrochemical cell. The photocurrent density of the sensitized electrode is found to enhance from-1 mA/cm(2) (unsensitized) to -2.2 mA/cm(2) (dye sensitized for 24 h) at 0 V vs RHE under AM1.5G artificial solar illumination in aqueous 0.5 M Na2SO4 solution. The photoluminescence spectra demonstrated a strong absorption at 465 nm by the mercurochrome. Subsequent transfer of the photoexcited electrons to CuO conduction band enhances the photocurrent density. An incident photon-to-current conversion efficiency (IPCE) of 8% has been observed in the visible region. This is so far the highest reported value in p-type CuO based organic dye-sensitized photocathode. The dye sensitized CuO has thus the potential of photoreduction with higher Faradaic efficiency for various redox species due to additional carrier injection.
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收藏
页码：3690 / 3699
页数：10
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