Dynamics of Charge Leakage From Self-assembled CdTe Quantum Dots
{\L}ukasz K{\l}opotowski, Mateusz Goryca, Tomasz Kazimierczuk, Piotr, Kossacki, Piotr Wojnar, Grzegorz Karczewski, and Tomasz Wojtowicz
TL;DR
This paper investigates how charge leaks from CdTe quantum dots over time, revealing a time-dependent leakage rate influenced by optically generated electric fields, supported by a rate equation model.
Contribution
It introduces a quantitative model describing charge leakage dynamics in CdTe quantum dots influenced by optically generated electric fields.
Findings
Leakage rate depends strongly on time
Optically generated electric fields influence charge loss
Rate equation model accurately reproduces observed dynamics
Abstract
We study the leakage dynamics of charge stored in an ensemble of CdTe quantum dots embedded in a field-effect structure. Optically excited electrons are stored and read out by a proper time sequence of bias pulses. We monitor the dynamics of electron loss and find that the rate of the leakage is strongly dependent on time, which we attribute to an optically generated electric field related to the stored charge. A rate equation model quantitatively reproduces the results.
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