Effect of thermal treatment on ZnSe quantum dots and energy transfer in borosilicate glasses doped with ZnSe and Er3+/ZnSe
Source abstract
Abstract
This study assessed the effect of heat treatment on the spectroscopic properties of borosilicate glasses doped with ZnSe quantum dots (QDs) and co-doped with Er 3+/ZnSe. The gradual growth of ZnSe QDs upon heat treatment was probed by TEM. The emission intensity of ZnSe-doped glasses rapidly increased up to 20 h of heat treatment because of the formation and development of ZnSe QDs, then gradually decreased due to the rise in non-radiative loss between the enlarged particles. With increasing number of ZnSe QDs, the energy transfer from QDs to Er 3+ ions became prominent in Er 3+/ZnSe-co-doped glasses, showing enhanced emission up to 20 h of heat treatment. The excited state 4S 3/2 lifetime values, increased with heat treatment, whereas an opposite trend was observed for the lifetime values of state 4I 13/2, indicating a possible participation of the ZnSe QDs in facilitating the energy migration mechanism through the 4I 13/2 level, followed by non-radiative decay.
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Research context
OpenAlex topics: Quantum Dots Synthesis And Properties · Luminescence Properties of Advanced Materials · Glass properties and applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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