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Title: Upcycling silicon photovoltaic waste into thermoelectrics
Authors: Cao, Jing
Sim, Ying
Tan, Xian Yi
Zheng, Jie
Chien, Sheau Wei
Jia, Ning
Chen, Kewei
Tay, Yeow Boon
Dong, Jin-Feng
Yang, Le
Ng, Hong Kuan
Liu, Hongfei
Tan, Ivan Chee Kiang
Xie, Guofeng
Zhu, Qiang
Li, Zibiao
Zhang, Gang
Hu, Lei
Zheng, Yun
Xu, Jianwei
Yan, Qingyu
Loh, Xian Jun
Mathews, Nripan
Wu, Jing
Suwardi, Ady
Keywords: Engineering::Materials
Issue Date: 2022
Source: Cao, J., Sim, Y., Tan, X. Y., Zheng, J., Chien, S. W., Jia, N., Chen, K., Tay, Y. B., Dong, J., Yang, L., Ng, H. K., Liu, H., Tan, I. C. K., Xie, G., Zhu, Q., Li, Z., Zhang, G., Hu, L., Zheng, Y., ...Suwardi, A. (2022). Upcycling silicon photovoltaic waste into thermoelectrics. Advanced Materials, 34(19), e2110518-.
Project: C210112022
Journal: Advanced Materials
Abstract: Two decades after the rapid expansion of photovoltaics, the number of solar panels reaching end-of-life is increasing. While precious metals such as silver and copper are usually recycled, silicon, which makes up the bulk of a solar cells, goes to landfills. This is due to the defect- and impurity-sensitive nature in most silicon-based technologies, rendering it uneconomical to purify waste silicon. Thermoelectrics represents a rare class of material in which defects and impurities can be engineered to enhance the performance. This is because of the majority-carrier nature, making it defect- and impurity-tolerant. Here, the upcycling of silicon from photovoltaic (PV) waste into thermoelectrics is enabled. This is done by doping 1% Ge and 4% P, which results in a figure of merit (zT) of 0.45 at 873 K, the highest among silicon-based thermoelectrics. The work represents an important piece of the puzzle in realizing a circular economy for photovoltaics and electronic waste.
ISSN: 0935-9648
DOI: 10.1002/adma.202110518
Rights: © 2022 Wiley-VCH GmbH. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
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