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首页> 外文期刊>Journal of Crystal Growth >Memory Effect Of Ge In Ⅲ-Ⅴ Semiconductors
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Memory Effect Of Ge In Ⅲ-Ⅴ Semiconductors

机译:Ge在Ⅲ-Ⅴ族半导体中的记忆效应

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摘要

Epitaxial growth of germanium is attractive for Ge/Ⅲ-Ⅴ hetero devices such as multi-junction solar cells. We investigated the growth of Ge with iso-butyl germane (IBGe) as germanium source and found a strong memory effect in our A1X2600-G3 metalorganic vapor phase epitaxy (MOVPE) reactor. The germanium background led to a higher n-type doping of i-GaAs and strongly reduced the photoluminescence (PL) intensity of Al_(0.3)Ga_(0.7)As and Ga_(0.5)In_(0.5)P. With secondary ion mass spectroscopy (SIMS) the quantity of Ge in Al_(0.3)Ga_(0.7)As could be determined to be in the range of 2 × 10~(17)cm~(-3), whereas a Ge-atom concentration in Ga_(0.5)In_(0.5)P of up to 2 ×10~(18)cm~(-3) was measured. The memory effect could be eliminated by changing all contaminated parts inside the MOVPE reactor.
机译:锗的外延生长对Ge /Ⅲ-Ⅴ异质器件(如多结太阳能电池)具有吸引力。我们研究了异丁基锗烷(IBGe)作为锗源的Ge的生长,并在我们的A1X2600-G3金属有机气相外延(MOVPE)反应器中发现了强大的记忆效应。锗背景导致i-GaAs的n型掺杂更高,并大大降低了Al_(0.3)Ga_(0.7)As和Ga_(0.5)In_(0.5)P的光致发光(PL)强度。通过二次离子质谱(SIMS),可以确定Al_(0.3)Ga_(0.7)As中的Ge量在2×10〜(17)cm〜(-3)范围内,而Ge原子测量了Ga_(0.5)In_(0.5)P中的浓度最高为2×10〜(18)cm〜(-3)。可以通过更换MOVPE反应器内的所有污染部件来消除记忆效应。

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