CdTe/CdS共敏化TiO2电极材料的制备与光电性能  

Preparation and Photoelectric Performance of CdTe/CdS Co-sensitized TiO_2 Electrode Materials

作　　者：汪婕[1] 计亚军[1] 邓亚磊 周路巍 

机构地区：[1]f上海理工大学理学院,上海200093

出　　处：《无机化学学报》2018年第2期255-262,共8页Chinese Journal of Inorganic Chemistry

基　　金：国家自然科学基金(No.32.15-341-007)、绿色催化四川省高校重点实验室2017年度开放课题(N0.LZJ1703)项目资助.

摘　　要：将电沉积法和化学浴沉积法结合,分别将CdTe和CdS量子点纳米晶材料引入到TiO_2纳米管阵列上制备CdTe/CdS量子点共敏化TiO_2光电极。利用扫描电镜、X射线衍射和X射线能量色散光谱等测试手段对所得样品的形貌、晶型和组分进行表征。在模拟太阳光照射条件下,通过电化学工作站测试其光电化学性能。研究结果表明,相对于单一量子点敏化CdS/TiO_2和CdTe/TiO_2光电极而言,共敏化CdTe/CdS/TiO_2光电极表现出更好的光电转化性能,短路电流密度和光电转换效率分别可以达到3.1 m A·cm^(-2)和1.85%。此外,采用电化学阻抗测试技术对材料性能提升的原因进行深入的探究。The CdTe and CdS nanocrystals were deposited on the TiO2 nanotube arrays by electrodeposition and chemical bath deposition method to obtain CdTe/CdS nanocrystals co-sensitized TiO2 photoelectrodes. The morphology, crystallinity and composition of samples were characterized by SEM, XRD and EDS. Under standard solar light irradiation, the photoelectrochemical performance of resulted photoelectrodes were investigated by means of electrochemical work station. The results show that the photoelectric conversion performance of co-sensitized CdTe/CdS/TiO2 photoelectrodes exhibit more excellent performance than that of single-sensitized CdS/TiO2 and CdTe/TiO2 based photoelectrodes. The short circuit photocurrent density and photoelectric conversion efficiency of CdTe/CdS/TiO2 could reach up to 3.1 mA·cm-2 and 1.85%, respectively. Meanwhile, the electrochemical impedance test has also been applied to further investigate the principle of enhanced performance.

关 键 词：TIO2纳米管阵列 电沉积法 化学浴沉积法 CdTe/CdS量子点共敏化 光电化学性能 

分 类 号：TM914[电气工程—电力电子与电力传动]