supported by the National Key Basic R&D Project of China(TG2011CB301900 and TG2012CB619304);the project of National High Technology of China(2011AA03A103);the National Natural Science Foundation of China(61076012 and60876063);the Beijing Municipal Science & Technology Commission(D111100001711002)
In order to solve the problems of GaN heteroepitaxy on sapphire substrate,some techniques were explored.Freestanding GaN substrates have been made by hydride vapor phase epitaxy(HVPE),laser lift-off(LLO),and chemical ...
financially supported by the National Basic Research Program of China (Nos. 2012CB619303 and 2012CB619304);the National Natural Science Foundation of China (Nos. 11023003, 10990102, 11174008 and 61076012);the National High Technology Research & Development Project of China (No. 2011AA03A103)
The growth and properties of N-polar Ga N layers by metal organic chemical vapor deposition(MOCVD) were reported. It is found that N-polar Ga N grown on normal sapphire substrate shows hexagonal hillock surface morp...
Project supported by the National Natural Science Foundation of China (Grant Nos. 61076012,61076013,and 51102003);the National High Technology Research and Development Program of China (Grant No. 2007AA03Z403);the Specialized Research Fund for the Doctoral Program of Higher Education,China (Grant No. 20100001120014);the National Basic Research Program of China (Grant No. 2012CB619304)
We investigate the mechanism for the improvement of p-type doping efficiency in Mg-Al0.14Ga0.86N/GaN super- lattices (SLs). It is shown that the hole concentration of SLs increases by nearly an order of magnitude, f...