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Your search keyword '"Li-E. Cai"' showing total 2 results
Start Over Author "Li-E. Cai" Journal physica e: low-dimensional systems and nanostructures
2 results on '"Li-E. Cai"'

1. Improvement of efficiency droop of GaN-based light-emitting devices by a rear nitride reflector

Author

Xiao-Long Hu, Qiming Wang, Li-E Cai, Jiang-Yong Zhang, Ming Chen, Chao-Min Wu, Fang Jiang, and Baoping Zhang

Subjects
Materials science, business.industry, Technology research, Reflector (antenna), Nitride, Condensed Matter Physics, Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials, law.invention, law, Optoelectronics, Voltage droop, Spontaneous emission, business, Science, technology and society, Light-emitting diode, Diode
Abstract

National High Technology Research and Development Program of China [2006AA03Z409]; National Science Foundation of China [60876007, 10974165]; Xiamen Municipal Science and Technology Bureau [2006AA03Z110]

Published
2010
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2. Formation of high reflective Ni/Ag/Ti/Au contact on p-GaN

Author

Baoping Zhang, Fang Jiang, Li-E Cai, and Jiang-Yong Zhang

Subjects
Auger electron spectroscopy, Materials science, Diffusion barrier, business.industry, Annealing (metallurgy), High reflectivity, Analytical chemistry, Condensed Matter Physics, Reflectivity, Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials, law.invention, Optics, law, Metallizing, business, Ohmic contact, Light-emitting diode
Abstract

A metallization scheme of Ni/Ag/Ti/Au has been developed for obtaining high reflective contacts on p-type GaN. In order to find optimal conditions to get a high reflectivity, we studied samples with various Ni thicknesses, annealing temperatures and annealing times. By annealing at 500 degrees C for 5 min in an O-2 ambient, a reflectivity as high as 94% was obtained from Ni/Ag/Ti/Au (1/120/120/50 nm). The effects of Ti layers on the suppression of Ag agglomeration were investigated by using Auger electron spectroscopy (AES). From AES depth profiles, it is clear that Ti acts as a diffusion barrier to prevent Au atoms from diffusing into the Ag layer, which is important in the formation of high reflectivity.

Published
2010
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