Enhanced separation efficiency of photoinduced charges for antimony-doped tin oxide (Sb-SnO2)/TiO2 heterojunction semiconductors with varied Sb doping concentration
Enhanced separation efficiency of photoinduced charges for antimony-doped tin oxide (Sb-SnO2)/TiO2 heterojunction semiconductors with varied Sb doping concentration
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不同 Sb 掺杂浓度的锑掺杂氧化锡 (Sb-SnO2)/TiO2 异质结半导体的光生电荷分离效率提高
DOI：
10.1063/1.4894615
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发表时间：
2014-09
影响因子：
3.2
通讯作者：
Wenhai Ma, Yanli Mao*
中科院分区：
文献类型：
--
作者：
Zhenlong Zhang;Wenhai Ma, Yanli Mao*
本文合成了不同Sb掺杂浓度的掺锑氧化锡（Sb-SnO 2）纳米粒子，并将其与TiO 2复合制备了Sb-SnO 2/TiO 2异质结半导体。利用表面光电压（SPV）技术表征了光生电荷的分离效率。与Sb-SnO 2和TiO 2相比，Sb-SnO 2/TiO 2具有更高的光生电荷分离效率，由Sb-SnO 2组成的Sb-SnO 2/TiO 2的SPV增强估计为1.40、1.43和1.99，Sb掺杂浓度分别为5%、10%和15%。为了理解增强，确定异质结半导体中Sb-SnO 2和TiO 2的能带结构，并且对于由Sb掺杂浓度为5%、10%和15%的Sb-SnO 2组成的Sb-SnO 2/TiO 2，估计Sb-SnO 2和TiO 2之间的导带偏移（CBO）分别为0.56、0.64和0.98 eV。这些结果表明，分离效率的提高是由于能级匹配的结果，而分离效率的提高是由于CBO的增加。
In this paper, antimony-doped tin oxide (Sb-SnO2) nanoparticles were synthesized with varied Sb doping concentration, and the Sb-SnO2/TiO2 heterojunction semiconductors were prepared with Sb-SnO2 and TiO2. The separation efficiency of photoinduced charges was characterized with surface photovoltage (SPV) technique. Compared with Sb-SnO2 and TiO2, Sb-SnO2/TiO2 presents an enhanced separation efficiency of photoinduced charges, and the SPV enhancements were estimated to be 1.40, 1.43, and 1.99 for Sb-SnO2/TiO2 composed of Sb-SnO2 with the Sb doping concentration of 5%, 10%, and 15%, respectively. To understand the enhancement, the band structure of Sb-SnO2 and TiO2 in the heterojunction semiconductor was determined, and the conduction band offsets (CBO) between Sb-SnO2 and TiO2 were estimated to be 0.56, 0.64, and 0.98 eV for Sb-SnO2/TiO2 composed of Sb-SnO2 with the Sb doping concentration of 5%, 10%, and 15%, respectively. These results indicate that the separation efficiency enhancement is resulting from the energy level matching, and the increase of enhancement is due to the rising of CBO.
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影响因子：
3.9
作者：
Sher Bahadur Rawal;A. Chakraborty;Yong Joo Kim;H. Kim;W. Lee
通讯作者：
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DOI：
10.1088/1755-1315/128/1/012086
发表时间：
2018-03
期刊：
IOP Conference Series: Earth and Environmental Science
影响因子：
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影响因子：
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作者：
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影响因子：
3.3
作者：
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通讯作者：
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DOI：
10.1007/s10854-005-6453-4
发表时间：
2005-02
期刊：
Journal of Materials Science: Materials in Electronics
影响因子：
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作者：
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