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dc.contributor.author徐瑋澤en_US
dc.contributor.authorWei-Tse Hsuen_US
dc.contributor.author謝文峰en_US
dc.contributor.authorWen-Feng Hsiehen_US
dc.date.accessioned2014-12-12T01:16:57Z-
dc.date.available2014-12-12T01:16:57Z-
dc.date.issued2007en_US
dc.identifier.urihttp://140.113.39.130/cdrfb3/record/nctu/#GT009524504en_US
dc.identifier.urihttp://hdl.handle.net/11536/38883-
dc.description.abstract利用量測由溶膠-凝膠製成不同晶粒大小的氧化鋅及不同鎂含量(0<x<0.05)氧化鎂鋅粉末(MgxZn1−xO)的變溫螢光光譜,可以得到激子-縱模光聲子(LO-phonon)之間耦合的關係。在氧化鋅量子點系統中不明顯激子的縱模光聲子映稱(LO-phonon replicas),以及較小的13 K至 300 K激子能量差顯示激子-縱模光聲子耦合強度的降低。從氧化鋅量子點系統及氧化鎂鋅粉末激子游離能的變大可得知激子波耳半徑的變小。這個結果將導致激子結構極性降低,以致於當氧化鋅量子點縮小及氧化鎂鋅中鎂含量增加,激子-縱模光聲子的交互作用將隨之減弱。zh_TW
dc.description.abstractThe coupling between exciton and longitudinal optical (LO) phonon was investigated by using of the temperature-dependent photoluminescence from various sizes of ZnO grain and MgxZn1−xO powders in the range of 0<x<0.05 prepared by sol-gel synthesis. The unapparent LO-phonon replicas of free exciton emission in ZnO quantum dots (QDs) system and the smaller free exciton energy difference between 13 K and 300 K reveal decreasing weighting of exciton□LO phonon coupling strength. From ZnO QDs system and MgxZn1-xO powders, the increase of the exciton binding energy resulting from the decrease of the exciton Bohr radius makes the exciton less polar that is responsible for reducing the coupling strength of exciton-LO phonon as shrinking ZnO QDs size and increasing Mg content.en_US
dc.language.isoen_USen_US
dc.subject溶膠-凝膠zh_TW
dc.subject氧化鋅zh_TW
dc.subject氧化鎂鋅zh_TW
dc.subject激子縱模光聲子zh_TW
dc.subjectSol-gelen_US
dc.subjectZnOen_US
dc.subjectMgZnOen_US
dc.subjectexciton-LO phononen_US
dc.title氧化鋅晶粒大小及氧化鎂鋅之鎂含量對激子-縱模光聲子作用的影響zh_TW
dc.titleEffect of grain size and Mg content of MgxZn1-xO on the exciton-longitudinal optical phonon interactionen_US
dc.typeThesisen_US
dc.contributor.department光電工程學系zh_TW
Appears in Collections:Thesis


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