20% efficiency mg/PCBM/p-type silicon hybrid solar cells

Silicon/organic hybrid solar cells, with relatively simple and low-energy consumption fabrication processes, hold the promise for over-all cost reduction. However, their performances are still not comparable to the commercial crystalline silicon (c-Si) solar cells. Here, hybrid devices with organic...

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Bibliographic Details
Published in:Solar energy materials and solar cells 2022-01, Vol.235, p.111453, Article 111453
Main Authors: Sun, Zongheng, Liu, Ming, Zhou, Yurong, Wang, Qi, Yang, Ying, Zhou, Yuqin, Liu, Fengzhen
Format: Article
Language:English
Subjects:
Butyric acid
Crystal structure
Crystallinity
Current carriers
Energy consumption
Fabrication
Heterojunciton solar cell
Hybrid solar cell
Interface passivation
Minority-carrier device
PCBM
Photovoltaic cells
Silicon
Silicon substrates
Solar cells
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Summary:Silicon/organic hybrid solar cells, with relatively simple and low-energy consumption fabrication processes, hold the promise for over-all cost reduction. However, their performances are still not comparable to the commercial crystalline silicon (c-Si) solar cells. Here, hybrid devices with organic phenyl-C61-butyric acid methyl ester (PCBM) layer inserted between metal electrode and textured p-type crystalline silicon (c-Si(p)) substrate are investigated. The quality of the PCBM/c-Si(p) contact is much improved after a SiOx thin layer is formed on the a-Si:H(i) surface and a Voc of 706 mV and an efficiency of 20.0% are achieved on the hybrid solar cells. Analysis of the dark J-V-T characteristics of the hybrid device shows that the junction current is dominated by the minority-carrier diffusion current. •A certificated efficiency of 20% was achieved on the Mg/PCBM/p-type c-Si hybrid solar cells.•The large built-in potential of hybrid cell resulted from the big work-functions difference between c-Si(p) and Mg electrode.•The minority-carrier diffusion process dominates the dark current.
ISSN:0927-0248
1879-3398
DOI:10.1016/j.solmat.2021.111453