Affiliation:
1. School of Materials and Chemistry University of Shanghai for Science and Technology Shanghai 200093 P. R. China
2. State Key Laboratory of High Performance Ceramics Microstructure Shanghai Institute of Ceramics Chinese Academy of Sciences Shanghai 201899 P. R. China
3. School of Materials Science and Engineering University of Jinan Shandong 250022 P. R. China
4. Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences Beijing 100049 P. R. China
5. State Key Laboratory of Crystal Materials Shandong University Jinan 250100 P. R. China
Abstract
AbstractCentimeter‐sized monoclinic BiVO4 (BVO) crystals are successfully grown by Bridgman method, and the physical and chemical properties of their exposed crystal surfaces have been studied. It is found that the atomic alignment and atomic density on different types of crystal facets of BiVO4 are different, which results in significant differences in its bandgap, charge lifetime, Raman scattering, and thermal diffusivity. Compared with other exposed crystal surfaces, the (010) oriented BiVO4 crystal has the lowest bandgap and the longest charge lifetime, with corresponding values of 2.26 eV and 11.44 ns, respectively. Besides, the (010) oriented BiVO4 crystal has a good thermal stability. This result indicates that the (010) oriented BiVO4 crystal has a wider optical absorption range, higher photogenerated charge mobility and stability, which is very important for understanding the influence of crystal orientation on electrode properties and the preparation of high‐efficiency photoelectrochemical photoanode.
Funder
National Natural Science Foundation of China
Science and Technology Commission of Shanghai Municipality
Subject
Condensed Matter Physics,General Materials Science,General Chemistry
Cited by
1 articles.
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