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thegarfield

铁杆木虫 (著名写手)

[求助] 半导体中掺杂元素的binding energy和PL中谱峰位置有什么关系?或者说复合机理

关于半导体中的PL和掺杂元素的binding energy的关系!
看文献时发现,对于半导体中参杂元素
If we assume a bound exciton binding energy of - 3 meV then the 0.795 eV peak would be separated from the band edge by 6 meV. The effective mass donor binding energy in In0.53 Ga.0.47 As is 3 meV; however, from luminescence measurements a binding energy of -7 meV is deduced.  We therefore assign the 0.795 eV peak to a donor-to-valence band transition.?
之前也有文献中谈到过C、Zn等掺杂元素的binding energy,但是一直没搞清楚binding energy和PL谱有什么关系,PL中峰位是怎么确定出来的?

求大神指导呀!!!不甚感激!!!
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