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Fabrication of ZnO based type-II core/shell nanowires for photovoltaic applications

Abstract

近来,由于持续增长的能源危机和环境保护意识,光伏器件已成为一个热门的课题。许多研究都集中在如何提升这类使用氧化物半导体,如ZnO,TiO2,的太阳能电池和光电化学电池(PEC)的效率上。这些氧化物半导体有这大且固定的带隙,使得它们都不能有效地吸收太阳光的可见光区域,从而导致电池效率低下。一个可选的策略是在纳米线外包裹一层窄带隙半导体,例如ZnSe,CdSe,CdS,PbSe和ZnCdSe,应用这个方法已经把材料的吸收拓展至可见光区域。由于光俘获范围有限以及光激发电子注入效率低等原因,大部分的这种核壳结构的光电转化效率(PCE)都较低。相比起二元材料,通过控制组分,三元合金ZnCdSe具有带隙可...Recently, photovoltaic devices have been a subject of great interest due to the growing awareness of energy crisis and environmental protection. Many studies have been focused on increasing the efficiency of solar cells or photo-electrochemical (PEC) cells using oxide semiconductors, such as ZnO, TiO2. These oxide semiconductors have large and fixed bandgaps, which individually can’t efficiently a...学位:理学博士院系专业:物理与机电工程学院_凝聚态物理学号:1982011015419

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