Presentation Details
| Photoluminescence imaging of luminescent down-shifting layers in silicon solar cells Anh Huy Tuan Le, Chang Sun, Yan Zhu, Ziv Hameiri. School of Photovoltaic and Renewable Energy Engineering, University of New South Wales, Sydney, Australia |
Abstract
As silicon (Si) solar cells approach their theoretical efficiency limit, further performance improvements become increasingly challenging, making even modest gains significant. Luminescent down-shifting (DS) materials offer a potential route to enhance photon utilisation by absorbing high-energy photons in the ultraviolet (UV)–blue spectral region and re-emitting them as lower-energy photons more efficiently absorbed by the Si cell, without modifying the underlying cell architecture. In addition, by absorbing UV radiation, DS layers may help mitigate UV-induced degradation, particularly in Si heterojunction solar cells. However, their module-level implementation requires characterisation techniques capable of assessing large-area spatial uniformity. In this study, a photoluminescence (PL) imaging methodology is developed for the spatially resolved characterisation of DS, with the ultimate aim to integrate the developed method as a line-scan PL tool into photovoltaic production lines. To this end, a proof-of-concept PL imaging tool is implemented, enabling high-resolution images and non-destructive assessment of DS spatial uniformity over large areas. Using the developed technique, the long-term UV stability of DS materials and Si solar cells is investigated.
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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.