Photovoltaic Performance of Plasmonic Thin Films with Different Structure of Au and TiO2

doi:10.6023/A13121232

Acta Chimica Sinica ›› 2014, Vol. 72 ›› Issue (5): 624-629.DOI: 10.6023/A13121232 Previous Articles

Article

不同结构的氧化钛纳米金复合薄膜的光伏特性

苑琪, 陈雪景, 王京涛, 翟锦

北京航空航天大学化学与环境学院仿生智能科学与技术教育部重点实验室北京 100191

投稿日期:2013-12-10 发布日期:2014-03-20
通讯作者: 翟锦 E-mail:zhaijin@buaa.edu.cn
基金资助:
项目受国家自然科学基金（No. 21073009）、国家教育部博士点基金（No. 30400002011127001）和国家重点基础研究发展计划（973）（No. 2011CB935704，2012CB720904）资助.

Photovoltaic Performance of Plasmonic Thin Films with Different Structure of Au and TiO₂

Yuan Qi, Chen Xuejing, Wang Jingtao, Zhai Jin

School of Chemistry and Environment, Beihang University, Xueyuan Road, Haidian District, Beijing 100191

Received:2013-12-10 Published:2014-03-20
Supported by:
Project supported by the National Natural Science Foundation of China (No. 21073009), Ph. D. Programs Foundation of Ministry of Education of China (No. 30400002011127001) and National Basic Research Program (Nos. 2011CB935704, 2012CB720904).

1. Photovoltaic Performance of Plasmonic Thin Films with Different Structure of Au and TiO₂.PDF(135KB)

Abstract

Metal-oxide nanostructures with Surface Plasmon Resonance (SPR) have been introduced to improve the light absorption ability of dye sensitized solar cells (DSSCs) so that the energy conversion efficiency can be enhanced. It should be noted that the structure of metal nanoparticles and the oxide substrate greatly influence the performance of the solar cells, both to utilize SPR to the fullest and to overcome the drawbacks such as charge recombination involved with metal nanoparticles. We studied the morphology of spin-coated thin films with different structures of Au and TiO₂, FTO/TiO₂/Au NPs, FTO/Au NPs/TiO₂ and FTO/TiO₂/Au/TiO₂ and examined the surface plasmon resonance effect on the light absorption ability and energy conversion behavior of dye sensitized solar cells with the as fabricated thin films as photo anodes. Electrode with Au NPs loaded on the top of TiO₂ thin film showed improved optical absorption in the visible region compared to the control sample of TiO₂ due to the surface plasmon resonance of Au NPs. However, the dye sensitized TiO₂-Au NPs films showed decreased photocurrent under illumination due to the charge recombination caused by bare Au NPs. On the other hand, when Au NPS were loaded beneath the TiO₂ film, the plasmonic electrode exhibited a 37% enhancement and increased incident photon-to-photocurrent efficiency (IPCE) in consistent with the improvement in absorption spectrum. To further confirm the role of Au NPs in the plasmonic films, the sandwich-like structure of TiO₂-Au-TiO₂ was introduced, behaving improved photovoltaic performance compared to the control TiO₂ electrode. Such results reveal that the design of structure can be of great importance to identify the favorably enhanced direction of plasmonic structure resulting from plasmonic scattering to trap light which confines light within the active TiO₂ layer to promote DSSCs. Dipole Discrete Approximation (DDA) simulation feedback supported the experimental results. This concept is applicable to potential plasmonic devices for DSSCs.

Key words: plasmonic thin film, metal nanostructure, DSSC, photovoltaic performance

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Yuan Qi, Chen Xuejing, Wang Jingtao, Zhai Jin. Photovoltaic Performance of Plasmonic Thin Films with Different Structure of Au and TiO₂[J]. Acta Chimica Sinica, 2014, 72(5): 624-629.

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不同结构的氧化钛纳米金复合薄膜的光伏特性

Photovoltaic Performance of Plasmonic Thin Films with Different Structure of Au and TiO₂

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