Extremely Slow Spontaneous Electron Trapping in Photodoped n-Type CdSe Nanocrystals.
Extremely Slow Spontaneous Electron Trapping in Photodoped n-Type CdSe Nanocrystals.
复制标题
光电掺杂 n 型 CdSe 纳米晶体中极慢的自发电子捕获。
DOI:
10.1021/acs.chemmater.7b00839
复制
发表时间:
2017
期刊:
影响因子:
--
通讯作者:
Gamelin,DanielR
中科院分区:
文献类型:
--
作者:
Tsui,EmilyY;Carroll,GerardM;Miller,Brigit;Marchioro,Arianna;Gamelin,DanielR
The trapping dynamics of conduction-band electrons in colloidal degenerately dopedn-CdSe nanocrystals prepared by photochemical reduction (photodoping) were measured by direct optical methods. The nanocrystals show spontaneous electron trapping with distributed kinetics that extend to remarkably long time scales. Shifts in nanocrystal band-edge potentials caused by quantum confinement and surface ion stoichiometry were also measured by spectroelectrochemical techniques, and their relationship to the slow electron trapping is discussed. The very long electron-trapping time scales observed in these measurements are more consistent with atomic rearrangement than with fundamental electron-transfer processes. Such slow and broadly distributed electron-trapping dynamics are reminiscent of the well-known distributed dynamics of nanocrystal photoluminescence blinking, and potential relationships between the two phenomena are discussed.
登录
查看更多内容
影响因子:
8.6
作者:
Zhao J;Nair G;Fisher BR;Bawendi MG
通讯作者:
Bawendi MG
影响因子:
8.6
作者:
Liu, William K.;Whitaker, Kelly M.;Gamelin, Daniel R.
通讯作者:
Gamelin, Daniel R.
影响因子:
15
作者:
H. Brown;S. Krishnamurthy;J. L. Hubbard
通讯作者:
J. L. Hubbard
DOI:
--
发表时间:
2009
期刊:
影响因子:
--
作者:
M. Tachiya;K. Seki
通讯作者:
K. Seki
影响因子:
15
作者:
Rinehart, Jeffrey D.;Weaver, Amanda L.;Gamelin, Daniel R.
通讯作者:
Gamelin, Daniel R.