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

被引：16

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.

引用

页码：3690 / 3699

页数：10

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