Proceedings of MATSUS Fall 2023 Conference (MATSUSFall23)
DOI: https://doi.org/10.29363/nanoge.matsus.2023.253
Publication date: 18th July 2023
Climate change and environmental degradation, mainly associated to the use of fossil fuels, are existential threats to the world. So, new and more advanced systems with reduced energy consumption have to be developed in order to allow real energy savings. In this context, the fabrication of low-cost, environmentally-friendly and high-efficiency photovoltaic and optoelectronic devices such as solar cells, LEDs, photodetectors, sensors or luminescent solar concentrators, is now more than ever a need to be addressed. Lead-halide perovskites have emerged as promising candidates for solid-state lighting applications. Perovskite light-emitting diodes (PeLEDs), akin to solar cells, have witnessed significant advancements.
This study presents a novel approach to address this challenge by utilizing CsPbBr3 colloidal perovskite nanocrystals (PeNCs) synthesized through a microwave-assisted method. The PeNCs exhibit a photoluminescence emission peak centered at 514 nm, with a narrow full width at half-maximum of 20.4 nm, resulting in an impressive photoluminescence quantum yield of 66.8%. Consequently, these PeLEDs demonstrate exceptional external quantum efficiency of 23.0% and power luminance levels surpassing 40000 cd m-2, meeting the requirements for various applications. These findings highlight the tremendous promise of PeNCs for LED lighting and displays, offering feasible levels of device performance.
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