教師資料查詢 | 類別: 期刊論文 | 教師: 鄭振益 JEN, JEN-YI (瀏覽個人網頁)

標題:Investigation of lateral exciton transfer of coexistent quantum dot systems
學年97
學期1
出版(發表)日期2008/10/01
作品名稱Investigation of lateral exciton transfer of coexistent quantum dot systems
作品名稱(其他語言)
著者Lee, Jia-ren; Lu, Chien-rong; Jen, Jen-yi
單位淡江大學物理學系
出版者College Park: American Institute of Physics
著錄名稱、卷期、頁數Journal of Applied Physics 104(7), pp.073523(4 pages)
摘要The optical characterization of the ZnCdSe/ZnSe quantum dot (QDs) system is studied by photoluminescence (PL) spectrum measured at temperatures from 22 to 300 K. The distinct quenching rates of spectral integrated intensity demonstrate that there are divergent lateral exciton transfer modes between two types of coexistent QDs with different sizes and densities. The smaller and denser QD assemblies are advantageous to trigger lateral migration of thermally activated excitons due to their shallower localization and more coupling channels. However, the carrier repopulation-induced redistribution of excitonic emission energy is contrarily observed in the deepest localized case. The extra redshift of transition energy with increasing temperature is attributed to the incompletely three-dimensional excitonic confinement induced by the morphological features. In contrast with scanning probe techniques, using PL as spectral probe is a nondestructive way to explore inner morphology of capped multiple quantum structure.
關鍵字cadmium compounds; excitons; II-VI semiconductors; photoluminescence; radiation quenching; red shift; scanning probe microscopy; semiconductor quantum dots; zinc compounds
語言英文
ISSN0021-8979;1089-7550
期刊性質國內
收錄於SCI;EI
產學合作
通訊作者Lee, Jia-ren
審稿制度
國別美國
公開徵稿
出版型式紙本;電子版
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