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Photonics 2017, 4(3), 42; doi:10.3390/photonics4030042

Totally Vacuum-Free Processed Crystalline Silicon Solar Cells over 17.5% Conversion Efficiency

1
Department of Materials and Synchrotron Radiation Engineering, University of Hyogo, 2167 Shosha, Himeji 671-2280, Japan
2
Department of Electrical and Electronic Engineering, Karadeniz Technical University, Trabzon 61080, Turkey
3
Daiwa Sangyo Co., Ltd., 3-4-11, Nakayasui, Sakai, Osaka 590-0063, Japan
*
Author to whom correspondence should be addressed.
Received: 11 July 2017 / Revised: 15 August 2017 / Accepted: 16 August 2017 / Published: 26 August 2017
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Abstract

In this work, we introduce a totally vacuum-free cost-efficient crystalline silicon solar cells. Solar cells were fabricated based on low-cost techniques including spin coating, spray pyrolysis, and screen-printing. A best efficiency of 17.51% was achieved by non-vacuum process with a basic structure of <AI/p+/p−Si/n+/SiO2/TiO2/Ag> CZ-Si p-type solar cells. Short circuit current density (JSC) and open circuit voltage (VOC) of the best cell were measured as 38.1 mA·cm−2 and 596.2 mV, respectively with fill factor (FF) of 77.1%. Suns-Voc measurements were carried out and the detrimental effect of the series resistance on the performance was revealed. It is concluded that higher efficiencies are achievable by the improvements of the contacts and by utilizing good quality starting wafers. View Full-Text
Keywords: crystalline silicon; low-cost solar cells; vacuum-less process crystalline silicon; low-cost solar cells; vacuum-less process
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Uzum, A.; Kanda, H.; Fukui, H.; Izumi, T.; Harada, T.; Ito, S. Totally Vacuum-Free Processed Crystalline Silicon Solar Cells over 17.5% Conversion Efficiency. Photonics 2017, 4, 42.

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