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Science 13 March 1998:
Vol. 279. no. 5357, pp. 1712 - 1714
DOI: 10.1126/science.279.5357.1712
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Reports

Identification of a Blue Photoluminescent Composite Material from a Combinatorial Library

Jingsong Wang, Young Yoo, Chen Gao, Ichiro Takeuchi, Xiaodong Sun, Hauyee Chang, X.-D. Xiang, * Peter G. Schultz *

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, Gd3Ga5O12/SiO2. Experimental evidence suggests that luminescence in this material may arise from interfacial effects between SiO2 and Gd3Ga5O12.

J. Wang, C. Gao, I. Takeuchi, X.-D. Xiang, Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.
Y. Yoo, Department of Physics, University of California, Berkeley, CA 94720, USA.
X. Sun and H. Chang, Department of Chemistry, University of California, Berkeley, CA 94720, USA.
P. G. Schultz, Materials Sciences Division, Lawrence Berkeley National Laboratory, and Howard Hughes Medical Institute, Department of Chemistry, University of California, Berkeley, CA 94720, USA.
*   To whom correspondence should be addressed. E-mail: xdxiang{at}lbl.gov (X.-D.X.) or PGSchultz{at}lbl.gov (P.G.S.).

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THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Combinatorial approach for ferroelectric material libraries prepared by liquid source misted chemical deposition method.
K. W. Kim, M. K. Jeon, K. S. Oh, T. S. Kim, Y. S. Kim, and S. I. Woo (2007)
PNAS 104, 1134-1139
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