Publication date: 7th July 2025
Colloidal quantum dots (QDs) are widely used as a printable semiconductor with opto-electronic properties tunable by size. Applications in display, projection or lighting rely on QDs emitting visible light, whereas QDs sensitive for infrared light are used in imaging systems. Here, we will discuss ongoing work at Ghent University on InP-based QDs, a key material for QD technology at visible wavelengths.
After outlining the requirements for luminescent color conversion, the different aspects that enable InP/ZnSe/ZnS QDs to be formed with a photoluminescence quantum yield of 95-100% will be discussed as a first step. Particular attention will be paid to the QD geometry, including the composition of the core/shell interface and the shell outer surface. Next, we will discuss the opto-electronic properties of InP/ZnSe QDs, with a specific focus on the core/shell band alignment and the occurrence of stimulated emission under high-power optical pumping. Finally, we will address the prospects of InP/ZnSe QDs for on-chip color conversion, where we will move from successful proof-of-concept demonstrators to an analysis of stability-limiting factors.
To conclude the presentation, we will give a future outlook on science and technology based on III-V QDs.
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