Presentation Details
| An alternative value‑creation concept for silicon waste in the PV industry. Jens Wolfram Palitzsch, Ingo Röver. LuxChemtech GmbH, Freiberg, Germany |
Abstract
The rapid expansion of the photovoltaics (PV) industry has created an overlooked paradox: while solar energy drives the global transition to sustainability, the volume and complexity of silicon‑based waste continue to rise. From kerf-loss powders and ingot offcuts to wafer scrap, cell rejects, and even recovered material from end‑of‑life modules, the spectrum of silicon waste is broad — and notoriously difficult and costly to reintegrate into the PV value chain. Existing initiatives demonstrate the potential, yet their high technical and economic barriers limit widespread adoption. This paper introduces a fundamentally different perspective: instead of forcing contaminated or doped silicon back into solar‑grade purity, we unlock the intrinsic energy embedded in its original production. By converting silicon waste into heat and hydrogen — while simultaneously generating valuable co-products such as water glass solutions and metal concentrates — we outline a simple, robust, and economically attractive pathway toward true ZERO‑waste strategies. The result is a circular concept that not only mitigates waste, but produces useful materials and electricity along the way, challenging conventional assumptions about what “silicon recycling” can be.
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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.