Three-dimensional Flower-like Rutile TiO2 Microsphere Composed of Nanorods: a Potential Material as Light Scattering Layer for DSSCs

doi:10.1007/s40242-017-6363-z

Chemical Research in Chinese Universities ›› 2017, Vol. 33 ›› Issue (2): 298-304.doi: 10.1007/s40242-017-6363-z

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Three-dimensional Flower-like Rutile TiO₂ Microsphere Composed of Nanorods: a Potential Material as Light Scattering Layer for DSSCs

SHI Yan¹, YANG Yulin¹, DONG Guohua^1,2, JIANG Yanxia¹, WEI Liguo³, SU Ting¹, FAN Ruiqing¹

1. MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, P. R. China;
2. College of Chemistry and Chemical Engineering, Qiqihar University, Qiqihar 161006, P. R. China;
3. College of Environmental and Chemical Engineering, Heilongjiang University of Science and Technology, Harbin 150022, P. R. China

Received:2016-09-01 Revised:2016-12-27 Online:2017-04-01 Published:2017-01-12
Contact: YANG Yulin,E-mail:ylyang@hit.edu.cn;FAN Ruiqing,E-mail:fanruiqing@hit.edu.cn E-mail:ylyang@hit.edu.cn;fanruiqing@hit.edu.cn
Supported by:
Supported by the National Natural Science Foundation of China(Nos.21571042, 21371040) and the National Key Basic Research Program of China(No.2013CB632900).

Abstract

Abstract:

The low spectrum utilization and the recombination of photo-generated electrons are the main challenges for improving the performance of dye sensitized solar cells(DSSCs). In this article, a three-dimensional flower-like rutile titanium dioxide(TDF-TiO₂) was successfully synthesized via a simple sol-thermal process. X-Ray diffraction patterns(XRD) and scan electron microscopy(SEM) images exhibit that the TDF-TiO₂ are the rutile TiO₂ microsphere composed of lots of regular cuboid nanorods. Applying this TDF-TiO₂ as light scattering layer on the photoanode of DSSCs, the devices present an excellent photovoltage performance, yielding a power conversion efficiency(PCE) of 7.69%, which can be mainly attributed to the enhanced light utilization and the reduced recombination of photo-generated electrons upon a combined analysis of electrochemical impedance spectroscopy(EIS), open-circuit voltage decay(OCVD), and intensity-modulated photocurrent spectroscopy and intensity-modulated photovoltage spectroscopy(IMPS/IMVS), etc. As a conclusion, TDF-TiO₂ is a potential material as light scattering layer and optical transition medium to improve the performance of DSSCs, and this work further demonstrated that regulating the morphology and particle size of TiO₂ is an efficient approach for enhancing the performance of DSSCs by optimizing the utilization of light and the transporting behaviors of photo-generated electrons.

Key words: Dye sensitized solar cell, Photoanode, Three-dimensional flower-like rutile TiO₂, Light scattering layer

SHI Yan, YANG Yulin, DONG Guohua, JIANG Yanxia, WEI Liguo, SU Ting, FAN Ruiqing. Three-dimensional Flower-like Rutile TiO₂ Microsphere Composed of Nanorods: a Potential Material as Light Scattering Layer for DSSCs[J]. Chemical Research in Chinese Universities, 2017, 33(2): 298-304.

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Three-dimensional Flower-like Rutile TiO₂ Microsphere Composed of Nanorods: a Potential Material as Light Scattering Layer for DSSCs

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