期刊文献+
共找到2篇文章
< 1 >
每页显示 20 50 100
激发功率密度和阱层厚度对极化InGaN/GaN多量子阱光致发光性能的影响 被引量:2
1
作者 张正宜 梁将 武维 《人工晶体学报》 EI CAS CSCD 北大核心 2017年第2期385-392,共8页
用MOCVD技术在c面蓝宝石衬底上生长了具有不同阱层厚度的InGaN/GaN多量子阱结构,研究了阱层厚度和激发功率密度对多量子阱光致发光(PL)性能的影响。结果表明,随着激发功率密度的增加,PL的峰值波长会出现不同程度的蓝移,且阱层越厚,蓝移... 用MOCVD技术在c面蓝宝石衬底上生长了具有不同阱层厚度的InGaN/GaN多量子阱结构,研究了阱层厚度和激发功率密度对多量子阱光致发光(PL)性能的影响。结果表明,随着激发功率密度的增加,PL的峰值波长会出现不同程度的蓝移,且阱层越厚,蓝移的越明显。PL的峰值波长随着激发功率密度和阱厚的变化关系可以用光生载流子对极化场的屏蔽效应和带隙填充效应来解释。阱最薄的样品(1.8 nm)由于其极化效应最弱,电致发光谱具有最高的发光强度,但其发光波长较短仅有430 nm。 展开更多
关键词 阱厚 激发功率密度 峰值波长 极化效应 带隙填充
下载PDF
A study of the operating parameters and barrier thickness of Al_(0.08)In_(0.08)Ga_(0.84)N/Al_xIn_yGa_(1-x-y)N double quantum well laser diodes
2
作者 A.J.GHAZAI S.M.THAHAB +1 位作者 H.ABU HASSAN Z.HASSAN 《Science China(Technological Sciences)》 SCIE EI CAS 2011年第1期47-51,共5页
The operating parameters such as the internal quantum efficiency (η), internal loss (α) and transparent threshold current density (J0) of double quantum well laser diodes were investigated and identified using... The operating parameters such as the internal quantum efficiency (η), internal loss (α) and transparent threshold current density (J0) of double quantum well laser diodes were investigated and identified using the program, Integrated System Engineering-Technical Computer Aided Design (ISE-TCAD). Various thicknesses (6, 7, 8, 10, 12 rim) of AlxInyGa1-x-yN barriers with (3 nm) Al0.08In0.08Ga0.84N wells as an active region were studied. The lowest threshold current (lth), and the highest output power (Pop) were 116 mA and 196 mW respectively, at barriers thickness of 6 nm, Al mole fraction of 10% and In mole fraction of 1%, at an emission wavelength of 359.6 nm. 展开更多
关键词 AIInGaN QUATERNARY UV laser diode quantum well barrier thickness
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部