Blue or red photoluminescence emission in α-Bi2 O3 needles: Effect of synthesis method

Monoclinic bismuth oxide (α-Bi2 O3 ) has attractive optical properties and, therefore, its photoluminescence (PL) behavior has been increasingly explored. Besides this fact, the influence of synthesis methods on PL properties of α-Bi2 O3 still requires research. This paper describes the influence of...

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Published inLuminescence (Chichester, England) Vol. 33; no. 7; pp. 1281 - 1287
Main Authors Schmidt, Samara, Kubaski, Evaldo T, Li, Máximo Siu, Bezzon, Vinicius D N, Sequinel, Thiago, Tebcherani, Sergio M
Format Journal Article
LanguageEnglish
Published 01.11.2018
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Summary:Monoclinic bismuth oxide (α-Bi2 O3 ) has attractive optical properties and, therefore, its photoluminescence (PL) behavior has been increasingly explored. Besides this fact, the influence of synthesis methods on PL properties of α-Bi2 O3 still requires research. This paper describes the influence of precipitation (PPT) and microwave-assisted hydrothermal (MAH) methods on PL properties of acicular α-Bi2 O3 microcrystals. The synthesis method promoted structural modifications on α-Bi2 O3 , in particular PPT increased the density of oxygen vacancies significantly. As a result, the PL properties of samples were different depending on the method of synthesis. PPT samples presented their maximum PL emission at 1.91 eV (red), while MAH samples had their maximum at 2.61 eV (blue). These results indicate the possibility of controlling PL properties of α-Bi2 O3 by simply choosing the adequate synthesis method.
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ISSN:1522-7243
DOI:10.1002/bio.3547