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Rare Earth doped Si based frequency conversion layer for Si Solar Cell

Abstract : This thesis work focuses on the development of silicon based down-conversion layers allowing the improvement of the silicon solar cells efficiency. SiNx terbium and ytterbium co-doped layers are produced by radio-frequency reactive magnetron co-sputtering. The optical properties of the undoped SiNx host matrix are investigated and optimized prior doping to obtain a layer suitable for the down-conversion process and keeping anti-reflective properties. The systems with the terbium-doped matrix and terbium-ytterbium co-doped matrix are optimized with the aim of achieving an intense photoluminescence emission from Tb3+ ions and Yb3+ ions respectively through a wide UV domain excitation. The energy transfer mechanisms between the matrix and the terbium ions and then between those last ions and the ytterbium ones are detailed. The cooperative energy transfer taking place between Tb3+-Yb3+ ions involved in the down-conversion process is highly dependent on the distance between the two ions. Thus, in order to achieve a higher quantum efficiency, a multilayer approach based on alternating stack of Tb- and Yb-doped sublayers has been developed to increase the number of excited Yb3+ ions. The effect of this approach on the frequency conversion process is discussed in details. Lastly, the optimized layers are deposited on industrial silicon solar cells in order to determine the influence of those layers on the solar cells efficiency.
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Submitted on : Tuesday, January 3, 2017 - 2:50:26 PM
Last modification on : Saturday, June 25, 2022 - 9:51:20 AM
Long-term archiving on: : Tuesday, April 4, 2017 - 1:45:18 PM


  • HAL Id : tel-01425297, version 1


Lucile Dumont. Rare Earth doped Si based frequency conversion layer for Si Solar Cell. Materials. Normandie Université, France; Université de Caen Normandie, 2016. English. ⟨tel-01425297⟩



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