Identification of a blue photoluminescent composite material from a combinatorial library

A quaternary combinatorial masking strategy was used in conjunction with photolithography to generate compositionally diverse thin-film phosphor libraries containing 1024 different compositions on substrates 2.5 centimeters square. A parallel imaging system and scanning spectrophotometer were used t...

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Bibliographic Details
Published in:Science (American Association for the Advancement of Science) 1998-03, Vol.270 (5357), p.1712
Main Authors: Wang, Jinsong, Yoo, Young, Takeuchi, Ichiro, Change, Hauyee, Xiang, X.-D, Schultz, Peter G
Format: Article
Language:English
Subjects:
Observations
Photoluminescence
Online Access:Get full text
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Summary:A quaternary combinatorial masking strategy was used in conjunction with photolithography to generate compositionally diverse thin-film phosphor libraries containing 1024 different compositions on substrates 2.5 centimeters square. A parallel imaging system and scanning spectrophotometer were used to identify and characterize compositions in the library with interesting luminescent behavior. Optimal compositions were identified with the use of gradient libraries, in which the stoichiometry of a material was varied continuously. This process led to the identification of an efficient blue photoluminescent composite material, [Gd.sub.3][Ga.sub.5][O.sub.12]/Si[O.sub.2]. Experimental evidence suggests that luminescence in this material may arise from interfacial effects between Si[O.sub.2] and [Gd.sub.3] [Ga.sub.5] [O.sub.12].
ISSN:0036-8075
1095-9203