Reversible Electrochemical Control over Photoexcited Luminescence of Core/Shell CdSe/ZnS Quantum Dot Film
作者: Bo LiMeilin LuWeilong LiuXiaojun ZhuXing HeYanqiang YangQingxin Yang
作者单位: 1Harbin Institute of Technology
刊名: Nanoscale Research Letters, 2017, Vol.12 (1)
来源数据库: Springer Journal
DOI: 10.1186/s11671-017-2398-9
关键词: Core/shell CdSe/ZnS quantum dotPhotoluminescenceElectrochemical controlCore emissionSurface emission
英文摘要: Semiconductor quantum dots (QDs) are widely used in light-emitting diodes and solar cells. Electrochemical modulation is a good way to understand the electrical and optical properties of QDs. In this work, the effects of electrochemical control on photoluminescence (PL) spectra in core/shell CdSe/ZnS QD films are studied. The results show different spectral responses for surface emission and core emission when a negative electrochemical potential is applied: the core emission is redshifted while the surface emission is blueshifted. The former is attributed to the electrostatic expansion of the excitonic wave function, due to the asymmetric distribution of adsorbed cations on the surface of the dots. The latter is attributed to the occupation of lower surface states by the injected...
原始语种摘要: Semiconductor quantum dots (QDs) are widely used in light-emitting diodes and solar cells. Electrochemical modulation is a good way to understand the electrical and optical properties of QDs. In this work, the effects of electrochemical control on photoluminescence (PL) spectra in core/shell CdSe/ZnS QD films are studied. The results show different spectral responses for surface emission and core emission when a negative electrochemical potential is applied: the core emission is redshifted while the surface emission is blueshifted. The former is attributed to the electrostatic expansion of the excitonic wave function, due to the asymmetric distribution of adsorbed cations on the surface of the dots. The latter is attributed to the occupation of lower surface states by the injected...
全文获取路径: Springer  (合作)
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来源刊物:
影响因子:2.524 (2012)

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关键词翻译
关键词翻译
  • photoexcited 光激发的
  • attributed 属性
  • surface 
  • shell 贝壳
  • emission 发射
  • spectral 谱的
  • electrostatic 静电的
  • core 岩心
  • trapped 捕集了的
  • understand 理解