Presentation Details
| Cadmium Telluride Photovoltaic Module Safety: Toxicological Evidence for Residential and End-User Deployment Aniruddha Savargaonkar1, Amit H.Munshi2, 3. 1Colorado State University, School of Biomedical and Chemical Engineering, Fort Collins, CO, USA.2Colorado State University, Department of Mechanical Engineering, Fort Collins, CO, USA.3JPHB Solutions LLC, Loveland, CO, USA |
Abstract
Cadmium telluride (CdTe) thin-film photovoltaics have been deployed at gigawatt scale for more than two decades, yet public perception frequently equates CdTe modules with the well-documented toxicity of elemental and soluble cadmium compounds. This paper presents a toxicological and materials-science based assessment of CdTe photovoltaic safety from the end-user and residential perspective. Evidence from toxicology, regulatory leaching tests, fire exposure studies, extreme weather case analyses, and lifecycle assessments is synthesized to evaluate realistic exposure pathways during normal operation, accidental breakage, fire scenarios, and end-of-life conditions. Results show that CdTe’s extreme chemical stability (Ksp ~10⁻³²), minimal cadmium inventory (8–16 g per module), strong adhesion to glass, and glass-glass encapsulation eliminate pathways for bioavailable cadmium. Under fire, breakage, flooding, and landfill conditions, measured cadmium release remains orders of magnitude below regulatory thresholds. Lifecycle analysis further demonstrates that CdTe deployment reduces net anthropogenic cadmium emissions by displacing coal combustion. These findings clarify common misconceptions and support CdTe photovoltaics as a safe and suitable technology for residential and end-user applications.
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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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