Brilliant yellow color and enhanced NIR reflectance of monoclinic BiVO4 through distortion in VO43− tetrahedra

Bright yellow coloration and enhanced NIR reflectance of monoclinic bismuth vanadate are obtained by the substitution of Ta/P into the vanadium sites of BiVO4. Pentavalent metal ion substitution in bismuth vanadate blue shifted the absorption edge leading to bright yellow coloration and the color pr...

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Bibliographic Details
Published in:Solar energy materials and solar cells 2013-05, Vol.112, p.134-143
Main Authors: Sandhya Kumari, L., Prabhakar Rao, P., Narayana Pillai Radhakrishnan, A., James, Vineetha, Sameera, S., Koshy, Peter
Format: Article
Language:English
Subjects:
Bismuth
Bismuth vanadate
Color
Crystallites
Distortion
NIR reflectance
Optical properties
Reflectance
Reflectivity
Vanadates
Yellow pigments
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Summary:Bright yellow coloration and enhanced NIR reflectance of monoclinic bismuth vanadate are obtained by the substitution of Ta/P into the vanadium sites of BiVO4. Pentavalent metal ion substitution in bismuth vanadate blue shifted the absorption edge leading to bright yellow coloration and the color properties are comparable to that of commercially used praseodymium yellow. Lattice distortion and reduced crystallite size imposed by pentavalent metal ion substitution are responsible for the special optical properties. The synthesized pigments with improved yellow coloration exhibits good NIR reflectance making them potential candidate for cool colorants to reduce the heat build-up. [Display omitted] ► New yellow pigments, BiV1−xMxO4 (M=Ta and P) with enhanced NIR reflectance have been prepared. ► Pentavalent metal ion substitution in bismuth vanadate exhibits brilliant yellow coloration. ► The lattice distortion and reduced crystallite size are ascribed to enhanced NIR reflectance. ► Coating studies of the pigments demonstrate their potential for cool colorants.
ISSN:0927-0248
1879-3398
DOI:10.1016/j.solmat.2013.01.022