Modulation of Band Gaps of Codoping GaN: A First Principles Study

Abstract:

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To improve the solar energy conversion of GaN for photocatalytic, the band gap of GaN should be tailored to match with visible light absorption, we calculated that Cr/C codoping effectively narrows the band gap of GaN by using first-principles calculations. Cr/C codoping can split the band gap with the formation of an intermediate band. Positive defect pair binding energy indicates that the defect pairs are stable with respect to the isolate impurity in the sample. The band gap narrowing can be optimized to shift light absorption into the peak of the visible spectral region , which enable maximal utilization of sunlight and thus offer immense potential for applications in solar energy conversion.

Info:

Periodical:

Advanced Materials Research (Volumes 287-290)

Edited by:

Jinglong Bu, Pengcheng Wang, Liqun Ai, Xiaoming Sang, Yungang Li

Pages:

306-312

DOI:

10.4028/www.scientific.net/AMR.287-290.306

Citation:

J. Wang et al., "Modulation of Band Gaps of Codoping GaN: A First Principles Study", Advanced Materials Research, Vols. 287-290, pp. 306-312, 2011

Online since:

July 2011

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Price:

$35.00

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