Low-Cost Perovskite Solar Cell Fabricated using the Expanded Graphite Back Contact and Electronically Conducting Activated Carbon as the Hole Transporting Material.

Autor:	Karunarathne BC; National Institute of Fundamental Studies, Kandy City 20000, Sri Lanka.; Postgraduate Institute of Science, University of Peradeniya, Peradeniya 20400, Sri Lanka., Dunuweera SP; Postgraduate Institute of Science, University of Peradeniya, Peradeniya 20400, Sri Lanka.; Department of Chemistry, University of Peradeniya, Peradeniya 20400, Sri Lanka., Medagedara AT; National Institute of Fundamental Studies, Kandy City 20000, Sri Lanka.; Postgraduate Institute of Science, University of Peradeniya, Peradeniya 20400, Sri Lanka., Velauthapillai D; Faculty of Engineering and Science, Western Norway University of Applied Sciences, Bergen 5063, Norway., Punniamoorthy R; Department of Physics, University of Jaffna, Jaffna 40000, Sri Lanka., Perera AGU; Department of Physics, Georgia State University, Atlanta, Georgia 30302, United States., DeSilva LA; Department of Physics, University of West Georgia, Carrollton, Georgia 30118, United States., Tennakone K; Department of Physics, Georgia State University, Atlanta, Georgia 30302, United States.; National Institute of Fundamental Studies, Kandy City 20000, Sri Lanka., Rajapakse RMG; Postgraduate Institute of Science, University of Peradeniya, Peradeniya 20400, Sri Lanka.; Department of Chemistry, University of Peradeniya, Peradeniya 20400, Sri Lanka., Kumara GRA; National Institute of Fundamental Studies, Kandy City 20000, Sri Lanka.
Jazyk:	angličtina
Zdroj:	ACS omega [ACS Omega] 2023 Jun 20; Vol. 8 (26), pp. 23501-23509. Date of Electronic Publication: 2023 Jun 20 (Print Publication: 2023).
DOI:	10.1021/acsomega.3c00637
Abstrakt:	Although perovskite solar cells (PSCs) have reached a record high conversion efficiency of 25.7%, the materials used to fabricate them invoke costly hole-transporting materials, such as spiro-OMeTAD, and expensive gold back contacts. The cost of fabrication of a solar cell or any other practical device is an important issue in their practical applications. In this study, we describe the fabrication of a low-cost, mesoscopic PSC, eliminating the use of expensive p-type semiconductors and substituting them with electronically conducting activated carbon, and the gold back contact with expanded graphite. The activated carbon hole transporting material was derived from readily available coconut shells and the expanded graphite from graphite attached to rock pieces of graphite vein banks. We drastically reduced the overall cell fabrication cost using these low-cost materials and added commercial value to discarded graphite and coconut shells. Under ambient conditions, our PSC gives a conversion efficiency of 8.60 ± 0.10 % at 1.5 AM simulated sunlight. We have identified the lower fill factor as the limiting factor for the low conversion efficiency. We believe that the lower cost of the materials used and the deceptively simple powder pressing method would compensate for the relatively lower conversion efficiency in its practical application. Competing Interests: The authors declare no competing financial interest. (© 2023 The Authors. Published by American Chemical Society.)
Databáze:	MEDLINE
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