三元有序合金GaxIn1-xP(x=0.52)的时间分辨谱
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Published:2002
Issue:1
Volume:51
Page:174
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ISSN:1000-3290
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Container-title:Acta Physica Sinica
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language:
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Short-container-title:Acta Phys. Sin.
Author:
Gao Yu-Lin ,Lu Yi-Jun ,Zheng Jian-Sheng ,Chai Zhi-Gang ,Sang Hai-Yu ,Zeng Xue-Ran ,
Abstract
Thetime resolvedphotoluminescence (TRPL)spectraoforderedGa0 .5In0 . 5Palloysgrownbymetalorganicvaporphaseepitaxywereinvestigated .Theleast squarefittingoftheluminescencedecayspectrashowsthatthereexisttwoexponentialprocesses:forthequickprocessthelifetimeτ1 isabout1 2 8ps— 2 50psand 1 86ps— 546psatroomtemperatureand77K ,respectively;andfortheslowprocessthelifetimeτ2 is,about3 0 8ps— 1 83 2ps,atroomtemperatureandat77K ,aslongasnanosecondandevenmorethan 2 8ns.Theshortlifetimeprocessbelongstotherecombinationofcarriersintheordereddomains,correspondingtothehigh energypeakinthePLspectra.Thelonglifetimeprocesscorrespondstothelow energypeakinthePLspectra.Thestrongexcitationintensitydependenceofτ2 atafixedenergyindicatesthatthelonglifetimeprocesscouldnotbeexplainedintermsofdonor acceptorpair(DAP) .Weattributetheemissiontotherecombinationbetweenthespatiallyseparatedcentersoftheelectronsinordereddomainsandtheholesindisorderedregions.TheTRPLspectraat77Kexhibitablue shiftwithtimedelay ,indicatingthatthecarrierstransferfromdisorderedregionstoordereddomains.
Publisher
Acta Physica Sinica, Chinese Physical Society and Institute of Physics, Chinese Academy of Sciences
Subject
General Physics and Astronomy
Cited by
3 articles.
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