Proceedings of Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics (IPEROP24)
Publication date: 18th October 2023
Recently, Doping of Cesium Lead Halide (CsPbX3) perovskites with one of trivalent lanthanide such as (Ce3+, Eu3+, Er3+, Dy3+, Sm3+, Tb3+, and Yb3+) have attracted attention in solar-energy-conversion technologies. This is due to its unique phenomenon known as downconversion, where a high-energy photon can be converted into two low-energy photons, resulting in photoluminescence quantum yields (PLQYs) above unity [1,2]. Several factors can limit the achievement of this value, either due to the efficiency of the energy transfer from perovskite (Visible region) to the dopant (near-infrared region) or the dopant luminescence.
To better understand these factors, we supposed that quantum cutting occurs by electron and hole transfer then we addressed a combination of Yb3+:CsPbCl3 powder synthesis (Hand-Grinding and Ball machine grinding with different Ytterbium concentration), photoluminescence spectroscopy, and ultrafast spectroscopy techniques. Our results reveal that there are two kinds of Yb3+ ions with different luminescence lifetimes (single ions with short lifetime and dimeric complexes with long lifetime), that strongly depend on the concentration of Ytterbium. Other limitation factors that may reduce the efficiency of quantum cutting are Yb3 quenching due to impurities or defect states. Our results are in agreement with the energy transfer by electron exchange model that we supposed and show that these factors play a critical role in quantum cutting efficiency.
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International Conference on Hybrid and Organic Photovoltaics
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Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics
The main topics of the Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics (IPEROP) are discussed every year in Asia-Pacific for gathering the recent advances in the fields of material preparation, modeling and fabrication of perovskite and hybrid and organic materials. Photovoltaic devices are analyzed from fundamental physics and materials properties to a broad set of applications. The conference also covers the developments of perovskite optoelectronics, including light-emitting diodes, lasers, optical devices, nanophotonics, nonlinear optical properties, colloidal nanostructures, photophysics and light-matter coupling.
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