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Title: Spray-on carbon black nanopowder/polyvinylidene fluoride-based solar-thermal-electric generators to power electronic devices
Authors: Li, Haitao
Huang, Jiangchao
Wang, Huan
Li, Xuan
Lee, Hiang Kwee
Han, Jie
Guo, Rong
Keywords: Science::Chemistry
Engineering::Chemical engineering
Issue Date: 2022
Source: Li, H., Huang, J., Wang, H., Li, X., Lee, H. K., Han, J. & Guo, R. (2022). Spray-on carbon black nanopowder/polyvinylidene fluoride-based solar-thermal-electric generators to power electronic devices. ACS Applied Nano Materials, 5(2), 2429-2435.
Project: RS13/20
Journal: ACS Applied Nano Materials
Abstract: Solar-driven generators are an emerging power generation technology due to the use of sunlight as a green and renewable energy source. However, the complex, tedious, and costly fabrication processes impede large-scale practical application. In this work, we demonstrate a unique solar-Thermal generator for efficient solar-Thermal-electric conversion to enable real-Time, outdoor charging applications using green solar energy. Our solar absorber comprises a cost-effective layer of nanoscale carbon black powders/polyvinylidene fluoride (CB/PVDF) mixture that can be easily sprayed onto the hot end of a commercial thermoelectric device for large-scale fabrication of the solar generator. The solar-Thermal conversion of the CB/PVDF solar absorber can be enhanced by designing hierarchical, micro/nano-sized porous structures for better light penetration and utilization and using an insulating sponge cover to promote heat localization and avert potential environmental fluctuations. These design criteria are necessary to achieve a stable and high electrical output (3.3 mW under 1 sun), even under diverse operating conditions such as different ambient temperatures (0-25 °C) and various sunlight intensities (1-7 sun). As a proof-of-concept application, our generators can be connected in series/parallel and further integrated with a voltage conversion module to enable the efficient and instantaneous charging of modern electronic devices using green solar energy, notably at a charging rate of about 5% per hour. Our unique design is anticipated to expedite the development of an efficient, portable solar generator with the aim to decentralize green power generation, which is beneficial in remote places that do not have access to the electrical grid.
ISSN: 2574-0970
DOI: 10.1021/acsanm.1c04128
Schools: School of Physical and Mathematical Sciences 
Rights: This document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Applied Nano Materials, copyright © 2022 American Chemical Society, after peer review and technical editing by the publisher. To access the final edited and published work see
Fulltext Permission: open
Fulltext Availability: With Fulltext
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