Fluorescence spectral shift of QD films with electron injection: Dependence on counterion proximity
作者: Meilin LuBo LiYaxin ZhangWeilong LiuYanqiang YangYuxiao WangQingxin Yang
作者单位: 1Department of Physics, Harbin Institute of Technology, Harbin, 150001, China
刊名: Chemical Physics Letters, 2017, Vol.675
来源数据库: Elsevier Journal
DOI: 10.1016/j.cplett.2017.03.015
关键词: Spectral shiftElectrochemical chargingQD filmsCounterion proximity
英文摘要: Abstract(#br)Due to the promising application of quantum dot (QD) films in solar cells, LEDs and environmental detectors, the fluorescence of charged QD films has achieved much attention during recent years. In this work, we observe the spectral shift of photoluminescence (PL) in charged CdSe/ZnS QD films controlled by electrochemical potential. The spectral center under negative bias changes from red-shift to blue-shift while introducing smaller inorganic counterions (potassium ions) into the electrolyte. This repeatable effect is attributed to the enhanced electron injection with smaller cations and the electronic perturbations of QD luminescence by these excess charges.
全文获取路径: Elsevier  (合作)
影响因子:2.145 (2012)

  • counterion 平衡离子
  • injection 贯入
  • films 薄膜
  • proximity 邻近
  • shift 变位
  • spectral 谱的
  • charging 充电
  • Fluorescence 荧光
  • electron 电子