Preparation of Spray Pyrolyzed Bismuth Oxide and its Application in Inhibition of Ultraviolet from Light-Emitting Diode (LED)

Chen Chin Yi; Jui Chung Weng; Jing Heng Chen; Shih Hsin Ma; Tzyy Leng Horng; Jerry J. Wu; Chien Yie Tsay

doi:10.4028/www.scientific.net/AMR.509.147

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 509Preparation of Spray Pyrolyzed Bismuth Oxide and...

Preparation of Spray Pyrolyzed Bismuth Oxide and its Application in Inhibition of Ultraviolet from Light-Emitting Diode (LED)

Abstract:

In the present study, bismuth oxide (Bi₂O₃) powders were prepared from bismuth nitrate at various temperatures by spray pyrolysis (SP). The Bi₂O₃ powder can convert from a monoclinic α phase to a tetragonal β phase at a pyrolysis temperature of > 600° C. The crystallinity of the SP powder increased with the increase of pyrolysis temperature. The resulting SP powders were then mixed with organics and screen-printed onto the surface of LED for the evaluation of ultraviolet (UV) inhibition. The β-type bismuth oxide powder pyrolyzed at 700°C exhibited a fine crystal structure. This caused the efficiency of UV inhibition to be 97.71% when the powder concentration was as low as 9.04 wt%.

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Periodical:

Advanced Materials Research (Volume 509)

Pages:

147-149

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.509.147

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Online since:

April 2012

Authors:

Chen Chin Yi, Jui Chung Weng, Jing Heng Chen, Shih Hsin Ma, Tzyy Leng Horng, Jerry J. Wu, Chien Yie Tsay

Keywords:

Bismuth Oxide, Light Emitting Diode (LED), Spray Pyrolysis, Ultraviolet

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References

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