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O Instytucie

Luminofory współdomieszkowane jonami Fe3+, Bi3+ do zastosowań w nowych wydajnych podczerwonych LED

01 styczeń 2022
Luminofory współdomieszkowane jonami Fe3+, Bi3+ do zastosowań w nowych wydajnych podczerwonych LED

Typ projektu: NAWA Canaletto

Kierownik projektu po stronie PL: prof. dr hab. Łukasz Marciniak

Kierownik projektu po stronie ITA:  prof. Michele Back (Università di Venezia "Ca' Foscari")

Nr projektu: PPN/BIT/2021/1/0012/U/00001

Przyznane finansowanie: 24 800 PLN

Opis projektu:

Thermally stable and efficient NIR phosphors to be implemented in NIR pc-LEDs for applications in agricultural industry or to control the food quality, to name a few, are highly challenging. The recent NIR phosphors based on Cr3+ suffer from the enhancing of the thermal quenching of the luminescence when the emission is red shifted by playing on the crystal field strength of the octahedral CrO6. In this view, transition metal ions stabilized in tetrahedral sites are expected to overcome this limitation. With the aim of providing a new family of efficient NIR phosphors thermally stable, we propose the use of a combination of Fe3+ in tetrahedral site and the sensitization with Bi3+ to enhance the cross-section and the luminescence efficiency through energy transfer. The investigation of the thermal quenching of the luminescence of the materials will be deeply analyzed to set guidelines for the future design of Fe3+-doped phosphors. A combination of theoretical, structural/morphological, and detailed spectroscopic analyses will be exploited to optimize the systems and, finally, to build NIR pc-LEDs with the best performing NIR emitting phosphors. The results are expected to significantly contribute to the development of a new group of phosphors for NIR applications, with a significant reduction of the energy consumption associated with the generation of NIR radiation and the reduction of the cost of their use.

The Polish side will be responsible for advanced characterization of spectroscopic properties of the obtained materials in a wide range of temperatures and their analysis allowing for development of qualitative and quantitative model enabling design of NIR phosphors with predefined spectroscopic parameters. On the other hand, the Italian side has extensive experience in the synthesis and characterization of the structural and morphological properties of inorganic bulk and nanomaterials.

Therefore, the goal of this project, although ambitious, can be achieved thanks to fruitful cooperation of Italian and Polish teams. The combination of the structural/morphological knowledge of the Italian team along with the spectroscopic knowledge of the Polish team are expected to be beneficial not only for the project but also for the sharing between the two Parties and the improvement of the early career researchers involved.


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