藍寶石基B0.375GaN/B0.45GaN量子阱結構的激光二極管中n-p電極對于p型電導率的影響 The effect of n-p electrodes upon the p-type conductivity of B0.375GaN/B0.45GaN QW/QB edge emitting laser diode grown over sapphire substrateMussaab I. NIASS鄭州大學 Mussaab I. NIASSZhengzhou University