MESSAI.iO

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Researchers developed a high-efficiency infrared quantum cutting mechanism in Tb3+−Yb3+ codoped silica hafnia glass and glass-ceramic thin films, which can convert light to lower energy levels and boost solar cell efficiency.

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Coulombic efficiency9%

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What they did

System
MEC

What worked

Coulombic efficiency9.00%best of 2

Abstract

An efficient quantum cutting mechanism was observed in a system comprising Tb3+−Yb3+ codoped silica hafnia glass and glass-ceramic. Thin films were deposited on silicon substrates using the dip-coating method and photoluminescence dynamics revealed a quantum efficiency of up to 179% at 980 nm. These films can efficiently convert light to lower energy levels and can easily be integrated into silicon-based solar cells, increasing their photoelectric conversion efficiency at a low cost. This was demonstrated through electrical characterization, which revealed a boost in solar cell efficiency when the film was utilized. It was specifically noted that the efficiency of Si solar cells increased by 10.79% and 10.78% when covered with 70SiO2−30HfO2−3Tb3+−12Yb3+ glass and glass ceramic, respectively. Furthermore, an evaluation of the additional external quantum efficiency, derived from this optical system, revealed an improvement ranging from 2.64% to 3.44%. This finding highlights the enhanced light conversion capabilities of the quantum cutting mechanism within the system.

Key findings

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Keywords

Quantum efficiencySolar cellCeramicHafniaGlass-ceramicSolar cell efficiency

Identifiers

DOI
10.3390/app13169390
Journal
Applied Sciences
Year
2023