首页> 外文期刊>Electrochimica Acta >High performance of TiO2 based solar cells sensitized with copper-indium sulfide colloids prepared in water: Roles of surface modifications with indium sulfide and zinc sulfide by SILAR methods
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High performance of TiO2 based solar cells sensitized with copper-indium sulfide colloids prepared in water: Roles of surface modifications with indium sulfide and zinc sulfide by SILAR methods

机译:水中制备的铜-铟-硫胶体敏化的TiO2基太阳能电池的高性能:通过SILAR方法用铟和硫化锌进行表面改性的作用

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摘要

The copper-indium-sulfide (CIS) ternary colloids capped with thioglycolic acid were directly prepared in water, and these hydrophilic colloids were strongly adsorbed on the TiO2 to form CIS TiO2 photoelectrodes without ligand-exchange. Furthermore, the photoelectrodes were modified with indium sulfide and/or zinc sulfide phases via successive ionic layer adsorption and reaction (SILAR). The preferable CIS TiO2 photoelectrode exhibited the photo-conversion efficiency (PCE) yielding with 4.39%, which is the highest value among the solar cell employing CIS colloids prepared in water at room temperature. The origin of high solar cell performance is attributed to the post surface modifications: the SILAR treatment by In3+/S2- ions improves light absorption of CIS and cathodic shift of the Fermi level due to the reduction of vacancies, while that by Zn2+/S2- ions forms passivation layers for blocking the back electron transfer at the interface between the electrode and electrolyte for retarding charge recombination. The synergetic effects by surface modifications of the CIS-TiO2 thus improved the PCE of the solar cell. (C) 2016 Elsevier Ltd. All rights reserved.
机译:直接在水中制备了巯基乙酸封端的铜-铟-硫(CIS)三元胶体,这些亲水性胶体强烈吸附在TiO2上,形成了没有配体交换的CIS TiO2光电极。此外,通过连续的离子层吸附和反应(SILAR),用硫化铟和/或硫化锌相修饰了光电极。优选的CIS TiO 2光电极表现出4.39%的光转换效率(PCE),这是在室温下使用水中制备的使用CIS胶体的太阳能电池中的最高值。高太阳能电池性能的根源在于表面修饰:In3 + / S2-离子的SILAR处理可提高CIS的光吸收和费米能级的阴极位移,这是由于空位的减少所致;而Zn2 + / S2-离子在电极和电解质之间的界面处形成钝化层,以阻止反电子转移,从而延迟电荷复合。 CIS-TiO2的表面改性产生的协同效应因此改善了太阳能电池的PCE。 (C)2016 Elsevier Ltd.保留所有权利。

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