Dresden 2014 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 12: Energy materials: Water splitting, batteries, and supercapacitors (with CPP/MM)

HL 12.2: Vortrag

Montag, 31. März 2014, 11:00–11:15, POT 081

Three-dimensional Ordered Macro-mesoporous Mo:BiVO4 Photoelectrode toward Efficient Photoelectrochemical Water Splitting — •Min Zhou1,2, Yang Xu1, Chengliang Wang1, Liaoyong Wen1, Yong Lei1, and Yi Xie21Ilmenau University of Technology, Institute of Physics & IMN MacroNano (ZIK) Prof. Schmidt-Str. 26, 98693 Ilmenau, Germany — 2University of Science & Technology of China, Hefei, China

In view of the worldwide energy challenge in the 21st century, the technology of semiconductor-based photoelectrochemical (PEC) water splitting has received considerable attention as an alternative approach for solar energy harvesting and storage.BiVO4 has been regarded as a promising material for PEC water splitting, but it suffers from a major challenge on charge migration. In order to meet this challenge, for the first time, we design a three-dimensional(3D) ordered macro-mesoporous architecture of Mo:BiVO4 through a controllable colloidal crystal template method. Within expectation, a superior photocurrent density is achieved in return for this design. This enhancement originates primarily from effective charge migration according to the analysis of electrochemical impedance spectroscopy. All the results highlight the great significance of the 3D ordered macro-mesoporous architecture as a promising photoelectrode model for the application in solar conversion. The cooperating amplification effects of nanoenegineering from composition regulation and morphology innovation provide new opportunities for creating more purpose-designed photoelectrodes with highly efficient performance.

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