La modified TiO2 photoanode and its effect on DSSC performance: A comparative study of doping and surface treatment on deep and surface charge trapping
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- 作者：Rajour Tanyi Akoa ; Piyasiri Ekanayakea ; b ; piyasiri.ekanayake@ubd.edu.bn" class="auth_mail" title="E-mail the corresponding author ; Ai Ling Tana ; David James Younga ; c ; d
- 关键词：Surface properties ; Electronic characterization ; Defects ; Photoelectron spectroscopy ; Optical materials
- 刊名：Materials Chemistry & Physics
- 出版年：2016
- 出版时间：1 April 2016
- 年：2016
- 卷：172
- 期：Complete
- 页码：105-112
- 全文大小：794 K
文摘
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DSSC performance is investigated using photoanodes of doped and La3+ surface treated TiO2.
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TiO2 and Mg–TiO2 treated with La3+ absorbed less visible light.
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A high concentration of absorbed oxygen on surface treated oxides reduced band bending.
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Increased surface free energy in the modified DSSC anodes is caused more by Mg2+ at Ti4+ than by La3+ at the surfaces.
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Near surface charge traps due to La3+ treatment promotes e–h recombination.