Presentation Details
| Optimizing Practical Applications of Downshifting Technology in Commercial Solar Cells Minh Tien Tran, Mingzhe Guo, Martin Green, Jessica Yajie Jiang. University of New South Wales, Sydney, Australia |
Abstract
Luminescent downshifting (LDS), also known as spectral conversion, is a promising strategy to address the limitation posed by spectral mismatch between silicon band gap and the solar spectrum. By converting high-energy photons into wavelengths more effectively utilized by silicon, LDS can mitigate ultraviolet-induced degradation (UVID) while offering potential efficiency enhancements. Although significant progress has been made in developing high-performance luminescent materials, their practical application to solar cells still presents some limitations. While the introduction of a downshifting layer can enhance the ultraviolet (UV) spectral response, it may also introduce parasitic optical losses due to increased reflection and scattering, leading to a reduction in overall device performance. In this work, a commercial luminescent material was incorporated into the encapsulant to form a dual-functional encapsulant-based downshifting layer. A systematic optimization process, including luminescent material concentration, film thickness, and particle size, was investigated to identify the optimal condition which downshifting effect can boost the cell performance. The study found that maintaining low concentrations of luminescent material (0.005 g/ml) with medium film thickness (55 µm) can boost maximum short-circuit current density by 0.55%.
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No part of this publication may be reproduced, distributed, or transmitted in any form or by any means, including photocopying, recording, or other electronic or mechanical methods, without the prior written permission of the author.
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