Hierarchical TiO2 Flower-spheres with Large Surface Area and High Scattering Ability: an Excellent Candidate for High Efficiency Dye Sensitized Solar Cells

doi:10.1007/s40242-015-5037-y

Chemical Research in Chinese Universities ›› 2015, Vol. 31 ›› Issue (5): 841-845.doi: 10.1007/s40242-015-5037-y

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Hierarchical TiO₂ Flower-spheres with Large Surface Area and High Scattering Ability: an Excellent Candidate for High Efficiency Dye Sensitized Solar Cells

MA Jian¹, YAO Shiting¹, CHENG Pengfei², DU Sisi¹, SUN Yanfeng¹, LIU Fengmin¹, LU Geyu¹

1. College of Electronic Science and Engineering, Jilin University, Changchun 130012, P. R. China;
2. School of Aerospace Science and Technology, Xidian University, Xi'an 710126, P. R China

Received:2015-01-27 Revised:2015-05-25 Online:2015-10-01 Published:2015-07-22
Contact: CHENG Pengfei, E-mail: pfcheng@xidian.edu.cn; LIU Fengmin, E-mail: fmliu@jlu.edu.cn E-mail:pfcheng@xidian.edu.cn;fmliu@jlu.edu.cn
Supported by:
Supported by the National Natural Science Foundation of China(Nos.61374218, 61134010, 61327804), the Program for Changjiang Scholars and Innovative Research Teams in University, China(No.IRT13018), the National High-Tech Research and Development Program of China(Nos.2013AA030902, 2014AA06A505), the Fundamental Research Funds for the Central Universities, China(Nos.JB151304, XJS14070) and the China Postdoctoral Science Foundation Funded Project(No. 2015M572525).

Abstract

Abstract:

Hierarchical TiO₂ flower-spheres assembled from porous nanosheets-stacked of nanoparticles were synthesized by a simple hydrothermal method with one-step. The as-prepared TiO₂ flower-spheres showed a diameter range from 200 nm to 550 nm and a large surface area of 188 m²/g. A double layer photoanode made of P25 nanoparticles and as-prepared TiO₂ flower-spheres was fabricated for the dye sensitized solar cells(DSSCs). The efficient light scattering and dye absorption of the photoanode can be attributed to the top-layer of hierarchical TiO₂ flower-spheres. DSSCs based on the double layers photoanode exhibit a higher energy conversion efficiency of 8.11% with a short-circuit photocurrent density of 17.87 mA/cm², indicating that there is an increase of 38% in the conversion efficiency compared to those based on electrode P25(5.91%, 14.09 mA/cm²).

Key words: Dye sensitized solar cell, TiO₂, Double layered photoanode, High specific surface area, Inhomogeneous size

MA Jian, YAO Shiting, CHENG Pengfei, DU Sisi, SUN Yanfeng, LIU Fengmin, LU Geyu. Hierarchical TiO₂ Flower-spheres with Large Surface Area and High Scattering Ability: an Excellent Candidate for High Efficiency Dye Sensitized Solar Cells[J]. Chemical Research in Chinese Universities, 2015, 31(5): 841-845.

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Hierarchical TiO₂ Flower-spheres with Large Surface Area and High Scattering Ability: an Excellent Candidate for High Efficiency Dye Sensitized Solar Cells

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