Lifetime Enhancement of a Circulated Cooling Perovskite Quantum Dots Colloidal Solution System for Laser Illuminations

Perovskite quantum dots (QDs) attracted a lot of attention recently due to their high light conversion efficiency, and high color purity. However, perovskite materials are sensitive to heat. High temperature will cause serious quenching problem of the perovskite QDs. In order to solve the QDs therma...

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Bibliographic Details
Published in:IEEE access 2019, Vol.7, p.136214-136222
Main Authors: Li, Zong-Tao, Tang, Xue-Ting, Yu, Jia-Dong, Tang, Yong, Yu, Bin-Hai, Hu, Yu-Ling, Liu, Bin, Ding, Xin-Rui
Format: Article
Language:English
Subjects:
Circulating
Closed loops
Colloids
Converters
Flow velocity
High temperature
laser
Laser cooling
Laser stability
Optical imaging
Optical properties
Optical pumping
Peltier cooler
perovskite quantum dots colloidal solution
Perovskites
Polytetrafluoroethylene
Quantum dot lasers
Quantum dots
Quenching
Stimulated emission
Temperature effects
Thermal stability
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Summary:Perovskite quantum dots (QDs) attracted a lot of attention recently due to their high light conversion efficiency, and high color purity. However, perovskite materials are sensitive to heat. High temperature will cause serious quenching problem of the perovskite QDs. In order to solve the QDs thermal quenching problem without destroying their optical characters. A circulating quantum dots colloidal solution converter (CQD-converter) was developed. A closed loop pump tube coated with Teflon was utilized to prevent perovskite QDs from the external environment. A peristaltic pump was utilized to drive the QDs colloidal solution through a Peltier cooler for dissipating the heat of the QDs colloidal solution. The lifetime of the perovskite QDs can be significantly improved under a 450nm laser excitation. The effects of temperature of the Peltier cooler and flow velocity on the optical properties of QDs were also investigated. Compared to the static quantum dots colloidal solution (SQD-converter), which quenched after 7 min, the optical properties were maintained after 600 min for the CQD-converter.
ISSN:2169-3536
2169-3536
DOI:10.1109/ACCESS.2019.2939589