摘要
纳米TiO_(2)半导体材料具有较高的禁带宽度和良好的耐光腐蚀性,被认为是最具有发展潜力的太阳能电池的光阳极材料,但二氧化钛存在禁带宽度大且激发波长短、光生电子容易复合等问题,在很大程度上阻碍了人们对提高染料敏化太阳能电池光电效率的研究。适当的金属和非金属掺杂剂可改善二氧化钛的内部结构,引入杂质能级和缺陷位置或替代晶格阵点上的氧原子,导致材料的表面结构和电子态发生变化,进一步促进了光生电子和空穴的分离,抑制了它们的复合,从而拓宽了可见光谱的响应范围并提高了光电性能。从掺杂剂种类入手,分别从金属掺杂、非金属掺杂和金属非金属共掺杂3个方面对掺杂机理进行梳理总结,并对未来研究方向进行展望。
Nano TiO_(2)semiconductor material possesses a large band gap width and excellent resistance to photo⁃corrosion,thus being considered as the most promising photoanode material for solar cell.However,titanium dioxide shows some problems such as wide band gap,short excitation wavelength as well as the easily recombined photogenerated electrons,which greatly hinders research on improving the photoelectrical efficiency of dye⁃sensitized solar cell.Appropriate metals and non⁃metal dopants can improve the internal structure of titanium dioxide,inserting impurity energy levels and defect positions,or substituting oxygen atoms on the lattice sites,leading to changes in the material's surface structure and electronic states.This further promotes the separation of photogenerated electrons and holes,suppresses their recombination,thereby broadening the response range of the visible light spectrum and enhancing the photoelectrical performance.This article systematically summarizes the doping mechanism from the perspective of dopant types,namely,metals doping,non⁃metals doping,and co⁃doping of metal and non⁃metal,and proposes prospects for future research directions.
作者
王锐
朵永超
张曙林
牛家嵘
金欣
王闻宇
WANG Rui;DUO Yong-chao;ZHANG Shu-lin;NIU Jia-rong;JIN Xin;WANG Wen-yu(School of Textile Science and Engineering,Tiangong University,Tianjin 300387,China;School of Material Science and Engineering,Tiangong University,Tianjin 300387,China)
出处
《现代化工》
CAS
CSCD
北大核心
2024年第S01期87-94,共8页
Modern Chemical Industry
关键词
染料敏化
太阳能电池
光阳极
掺杂
光电性能
二氧化钛
dye sensitized
solar cell
photoanode
doping
optoelectronic performance
TiO_(2)
