Light emitting semiconductor devices with getter layer
Light emitting semiconductor devices with getter layer
复制标题
具有吸气层的发光半导体器件
DOI:
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发表时间:
2015
期刊:
影响因子:
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通讯作者:
M.F.C.谢曼恩
中科院分区:
文献类型:
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作者:
U.维奇曼恩;J.S.科布;A.P.恩格哈德特;H.梅恩奇;M.F.C.谢曼恩
The invention describes a light emitting semiconductor device (100) comprising a substrate (120), a light emitting layer structure (155) and an AlGaAs getter layer (190) for reducing an impurity in the light emitting layer structure (155), the light emitting layer structure (155) comprising an active layer (140) and layers of varying Aluminum content, wherein the growth conditions of the layers of the light emitting layer structure (155) comprising Aluminum are different in comparison to the growth conditions of the AlGaAs getter layer (190). The AlGaAs getter layer (190) enables a reduction of the concentration of impurities like Sulfur etc. in the gas phase of a deposition equipment or growth reactor. The reduction of such impurities reduces the probability of incorporation of the impurities in the light emitting layer structure (155) which may affect the lifetime of the light emitting semiconductor device (100). The growth conditions are chosen out of the group Arsenic partial pressure, Oxygen partial pressure, deposition temperature, total deposition pressure and deposition rate of Aluminum. The invention further relates to a corresponding method of manufacturing such a light emitting semiconductor device (100).