Thermal Recovery of Colloidal Quantum Dot Ensembles Following Photoinduced Dimming.

Thermal Recovery of Colloidal Quantum Dot Ensembles Following Photoinduced Dimming.
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光诱导调光后胶体量子点集合体的热恢复。

DOI:
10.1021/acs.jpclett.5b00989
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发表时间:
2015
期刊:
The journal of physical chemistry letters
影响因子:
--
通讯作者:
Bawendi,MoungiG
Bawendi,MoungiG
中科院分区:
--
文献类型:
--
作者:
Jensen,RussellA;Coropceanu,Igor;Chen,Yue;Bawendi,MoungiG

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Colloidal CdSe quantum dot (QD) core ensembles were photodimmed and allowed to recover in the dark using ambient thermal energy at a range of temperatures. Nonlinear thermal recovery is well described by a stretched exponential function, and further analysis yields an underlying probability distribution of rate constants. Casting the rate constants as a collection of first-order activated processes provides an activation barrier probability distribution with significant density at room-temperature thermal energy that peaks at 200 meV before decaying to zero. This treatment for the recovery transition intuitively describes the distributed kinetics observed and complements commonly proposed blinking mechanisms.
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