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Title: Effects of rare earth substitution on the optical properties of Bi{sub 2}MoO{sub 6} for coloring applications

Highlights: • New class of colored compounds BiREMoO{sub 6} (RE = Pr, Nd, Sm, Tb, Yb) was synthesized. • The substitution of RE gently red shifts the absorption edge to low energy side. • The differences in band gap depend on the position of the RE f bands. • The yellow colored compounds demonstrated good coloration to plastics. - Abstract: A new class of colored inorganic compounds, BiREMoO{sub 6} (RE = Pr, Nd, Sm, Tb and Yb) has been synthesized by a solid state route. The substitution of different rare earths for Bi{sup 3+} in Bi{sub 2}MoO{sub 6} produces visible light responsive compounds by gently red shifting the absorption edge to low energy side. The visible light absorption is based on the charge transfer transitions from O{sub 2p} valence band to conduction band made of primary Mo{sub 4d} and secondary Bi{sub 6p}. The substitution of RE{sup 3+} introduces partially occupied 4f electronic levels in between the band gap and the position of 4f level depend on the number of f electrons which allows tuning the band gap. Thus the rare earth substitution provides an opportunity to tailor the band gap of Bi{sub 2}MoO{sub 6} from 2.99 eV to 2.19 eV.more » The developed compounds exhibited different shades of yellow hue and demonstrated good coloration to plastics.« less
Authors:
 [1] ;  [2] ; ; ;  [2]
  1. Department of Optoelectronics, University of Kerala, Thiruvananthapuram 695 581 (India)
  2. Materials Science and Technology Division, National Institute for Interdisciplinary Science and Technology, Thiruvananthapuram 695 019 (India)
Publication Date:
OSTI Identifier:
22475892
Resource Type:
Journal Article
Resource Relation:
Journal Name: Materials Research Bulletin; Journal Volume: 70; Other Information: Copyright (c) 2015 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ABSORPTION; BISMUTH COMPOUNDS; COLOR; COLORATION; ELECTRONIC STRUCTURE; MOLYBDATES; NEODYMIUM ADDITIONS; OXIDES; PRASEODYMIUM ADDITIONS; RARE EARTH ADDITIONS; RED SHIFT; SAMARIUM COMPOUNDS; SOLIDS; TERBIUM ADDITIONS; VALENCE; VISIBLE RADIATION; YTTERBIUM ADDITIONS