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首页> 外文期刊>Microelectronic Engineering >Blue-green light-emitting diode with patterned electrode: Spectral analysis
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Blue-green light-emitting diode with patterned electrode: Spectral analysis

机译：带有图案电极的蓝绿色发光二极管：光谱分析

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摘要

Two step decomposition procedure was developed and implemented to analyze experimentally measured EL-spectra of light-emitting diode (LED) with mesh-like top electrode and two sets of InGaN/GaN quantum wells (QWs) for blue and green emissions. At a first step EL-spectra were decomposed into basic Gaussian functions (GFs) for blue, green, and violet emission lines. Then each of the basic GFs was decomposed into the secondary GFs which give reasonable ground to relate broadening of EL-spectrum to the position dependent compensation of quantum-confined Stark effect (QCSE) in the InGaN/GaN QWs. Metal strips prevent from extraction a portion of light not only with larger intensity but also with shorter wavelength comparing to those for the light extracted from the uncovered active region. Such a "cut-off" manifests itself in longer central peak wavelengths of the basic blue and green GFs obtained by EL-spectrum decomposition comparing to the emission spectra of blue and green QWs. Analysis of basic GFs allowed to evaluate quantitatively splitting of the injected charge carriers between blue and green QWs and the third source of violet emission. This can be useful in optimization-oriented modeling of the LED's performance.
机译：开发并实施了两步分解程序，以分析实验测量的带有网状顶部电极和两组InGaN / GaN量子阱（QW）的发光二极管（LED）的蓝光和绿光。第一步，EL光谱被分解为蓝色，绿色和紫色发射线的基本高斯函数（GF）。然后将每个基本GF分解为第二个GF，这为将EL光谱的扩展与InGaN / GaN QW中量子限制斯塔克效应（QCSE）的位置相关补偿相关提供了合理的依据。与从未覆盖的有源区域提取的光相比，金属条不仅防止提取出一部分强度更高，而且波长更短的光。与蓝色和绿色QW的发射光谱相比，这种“截止”表现在通过EL光谱分解获得的基本蓝色和绿色GF的更长的中心峰值波长中。基本GF的分析可以评估在蓝色和绿色QW和第三种紫光发射源之间注入的电荷载流子的定量分配。这对于以优化为导向的LED性能建模很有用。

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