Stable Core/Shell CdTe/Mn-CdS Quantum Dots Sensitized Three-Dimensional, Macroporous ZnO Nanosheet Photoelectrode and Their Photoelectrochemical Properties
Stable Core/Shell CdTe/Mn-CdS Quantum Dots Sensitized Three-Dimensional, Macroporous ZnO Nanosheet Photoelectrode and Their Photoelectrochemical Properties
复制标题
稳定核/壳CdTe/Mn-CdS量子点敏化三维大孔ZnO纳米片光电极及其光电化学性能
DOI：
10.1021/am502151m
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发表时间：
2014-08-13
影响因子：
9.5
通讯作者：
Cai, Qingyun
中科院分区：
文献类型：
--
作者：
Li, Weili;Sheng, Pengtao;Cai, Qingyun
采用电沉积-连续离子层吸附反应（SILAR）法制备了ZnS/CdTe/Mn-CdS/ZnS敏化三维大孔ZnO纳米片（NS）光电极。通过将CdTe/Mn-CdS核壳量子点与ZnO NS偶联，并引入ZnS层作为势垒，可显著提高光电极的性能。在AM 1.5G模拟太阳光照射下，光电流密度从ZnO NS（0.45 mA/cm ~ 2）、CdTe/Mn-CdS/ZnO NS（4.98 mA/cm ~ 2）到ZnS/CdTe/Mn-CdS/ZnS/ZnO（6.23 mA/cm ~ 2）依次增加。更重要的是，ZnS/CdTe/Mn-CdS/ZnS敏化的ZnO NS光电极在-0.39VvsAg/AgCl处提供了4.20%的显著光电化学电池效率。
A novel photoelectrode based on ZnS/CdTe/Mn-CdS/ZnS-sensitized three-dimensional macroporous ZnO nanosheet (NS) has been prepared by electrodeposition and successive ion layer adsorption and reaction (SILAR) method. The photoelectrode performances were significantly improved through the coupling of the core/shell CdTe/Mn-CdS quantum dots (QDs) with ZnO NS, and the introduction of the ZnS layer as a potential barrier. The photocurrent density systematically increases from ZnO NS (0.45 mA/cm(2)), CdTe/Mn-CdS/ZnO NS (4.98 mA/cm(2)), to ZnS/CdTe/Mn-CdS/ZnS/ZnO (6.23 mA/cm(2)) under the irradiation of AM 1.5G simulated sunlight. More important, the ZnS/CdTe/Mn-CdS/ZnS-sensitized ZnO NS photoelectrode provides a remarkable photoelectrochernical cell efficiency of 4.20% at -0.39 V vs Ag/AgCl.