Improving the efficiency of cadmium sulfide-sensitized titanium dioxide/indium tin oxide glass photoelectrodes using silver sulfide as an energy barrier layer and a light absorber.
Improving the efficiency of cadmium sulfide-sensitized titanium dioxide/indium tin oxide glass photoelectrodes using silver sulfide as an energy barrier layer and a light absorber.
复制标题
使用硫化银作为能量阻挡层和光吸收剂提高硫化镉敏化二氧化钛/氧化铟锡玻璃光电极的效率
DOI：
10.1186/1556-276x-9-605
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发表时间：
2014
影响因子：
--
通讯作者：
Li F
中科院分区：
文献类型：
--
作者：
Chen C;Zhai Y;Li C;Li F
采用分子前驱体分解法在ITO（铟锡氧化物）衬底上制备了CdS和银S纳米晶，并在TiO 2纳米晶薄膜上沉积了CdS/Ag 2 S/TiO 2/ITO光电极。Ag 2S作为能量阻挡层和光吸收剂插入在TiO 2SiO 2薄膜和CdS纳米晶体之间。因此，CdS/Ag 2S/TiO 2/ITO电极的能量转换效率显著提高。在AM 1.5G太阳光照射下，CdS（4）/Ag 2S/TiO 2/ITO电极的最大效率为3.46%，与不含Ag 2S层的CdS（4）/TiO 2/ITO电极相比，提高了约150%。我们的实验结果表明，提高的效率主要是由于形成的Ag 2S层，可以增加光吸收和减少光生电子与电解质的氧化还原离子的复合。
Cadmium sulfide (CdS) and silver sulfide (Ag2S) nanocrystals are deposited on the titanium dioxide (TiO2) nanocrystalline film on indium tin oxide (ITO) substrate to prepare CdS/Ag2S/TiO2/ITO photoelectrodes through a new method known as the molecular precursor decomposition method. The Ag2S is interposed between the TiO2nanocrystal film and CdS nanocrystals as an energy barrier layer and a light absorber. As a consequence, the energy conversion efficiency of the CdS/Ag2S/TiO2/ITO electrodes is significantly improved. Under AM 1.5 G sunlight irradiation, the maximum efficiency achieved for the CdS(4)/Ag2S/TiO2/ITO electrode is 3.46%, corresponding to an increase of about 150% as compared to the CdS(4)/TiO2/ITO electrode without the Ag2S layer. Our experimental results show that the improved efficiency is mainly due to the formation of Ag2S layer that may increase the light absorbance and reduce the recombination of photogenerated electrons with redox ions from the electrolyte.