Limitation factors in Quantum Cutting processes in Lead Halide Perovskites Doped with Ytterbium
Lamiaa Abdelrazik a, Simona Streckaite a, Marius Franckevicius a, Vidmantas Gulbinas a
a Center for Physical Sciences and Technology, Vilnius, LT-10257, Lithuania.
Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics
Proceedings of Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics (IPEROP24)
Tokyo, Japan, 2024 January 21st - 23rd
Organizers: Qing Shen and James Ryan
Poster, Lamiaa Abdelrazik, 104
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.

We use our own and third party cookies for analysing and measuring usage of our website to improve our services. If you continue browsing, we consider accepting its use. You can check our Cookies Policy in which you will also find how to configure your web browser for the use of cookies. More info