Photocurrent enhancement of the CdS/TiO2/ITO photoelectrodes achieved by controlling the deposition amount of Ag2S nanocrystals
Photocurrent enhancement of the CdS/TiO2/ITO photoelectrodes achieved by controlling the deposition amount of Ag2S nanocrystals
复制标题
通过控制Ag2S纳米晶的沉积量实现CdS/TiO2/ITO光电极的光电流增强
DOI：
10.1016/j.apsusc.2015.08.134
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发表时间：
2015-11-30
影响因子：
6.7
通讯作者：
Ling, Lanyu
中科院分区：
文献类型：
--
作者：
Chen, Chong;Zhai, Yong;Ling, Lanyu
将具有互补吸收光谱的硫化银（Ag 2 S）纳米晶作为共敏化剂沉积在二氧化钛（TiO 2）纳米晶/ITO光电极表面，以提高硫化镉（CdS）敏化TiO 2/ITO光电极的光电流密度。采用分子前驱体分解法直接合成了Ag_2S和CdS。研究了沉积Ag_2S对CdS/Ag_2S/TiO_2/ITO光电极光电化学性能的影响。与不含Ag 2S的CdS/TiO 2/ITO电极相比，沉积的Ag 2S纳米晶显著增加了CdS/Ag 2S/TiO 2/ITO电极的光吸收。此外，CdS/Ag 2S/TiO 2/ITO电极的光吸收增加，电荷复合减少，从而提高了光电流密度。但Ag 2S沉积量过多不利于CdS/TiO 2/ITO电极光电流密度的进一步提高。(C)2015 Elsevier B. V.版权所有。
Silver sulfide (Ag2S) nanocrystals as a co-sensitizer with complementary absorption spectra are deposited on the surface of titanium dioxide (TiO2) nanocrystalline/ITO photoelectrodes to improve the photocurrent densities of cadmium sulfide (CdS) sensitized TiO2/ITO photoelectrodes. Both Ag2S and CdS are directly synthesized using a newly developed molecular precursor decomposition method. The effect of deposited Ag2S on the photoelectrochemical properties of the CdS/Ag2S/TiO2/ITO photoelectrodes has been investigated. Compared to the CdS/TiO2/ITO electrode without Ag2S, the deposited Ag2S nanocrystals significantly increase the light absorption of the CdS/Ag2S/TiO2/ITO electrode. Moreover, the photocurrent density of the CdS/Ag2S/TiO2/ITO electrode can be improved due to the increased light absorption and reduced charge recombination. However, excessive deposition amount of Ag2S is not conducive to the further increase of photocurrent density of the CdS/TiO2/ITO electrode. (C) 2015 Elsevier B.V. All rights reserved.