Radially oriented mesoporous TiO2 microspheres with single-crystal-like anatase walls for high-efficiency optoelectronic devices

Yong Liu, Renchao Che, Gang Chen, Jianwei Fan, Zhenkun Sun, Zhangxiong Wu, Minghong Wang, Bin Li, Jing Wei, Yong Wei, Geng Wang, Guozhen Guan, Ahmed A. Elzatahry, Abdulaziz A. Bagabas, Abdullah M. Al-Enizi, Yonghui Deng, Huisheng Peng, Dongyuan Zhao

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104 Citations (Scopus)

Abstract

Highly crystalline mesoporous materials with oriented configurations are in demand for high-performance energy conversion devices. We report a simple evaporation-driven oriented assembly method to synthesize three-dimensional open mesoporous TiO 2 microspheres with a diameter of ∼800 nm, well-controlled radially oriented hexagonal mesochannels, and crystalline anatase walls. The mesoporous TiO 2 spheres have a large accessible surface area (112 m 2 /g), a large pore volume (0.164 cm 3 /g), and highly single-crystal-like anatase walls with dominant (101) exposed facets, making them ideal for conducting mesoscopic photoanode films. Dye-sensitized solar cells (DSSCs) based on the mesoporous TiO 2 microspheres and commercial dye N719 have a photoelectric conversion efficiency of up to 12.1%. This evaporation-driven approach can create opportunities for tailoring the orientation of inorganic building blocks in the assembly of various mesoporous materials.
Original languageEnglish
Article numbere1500166
Number of pages8
JournalScience Advances
Volume1
Issue number4
DOIs
Publication statusPublished - 8 May 2015
Externally publishedYes

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