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7.6% CZGSe Solar Cells Thanks to Optimized CdS Chemical Bath Deposition
Author(s) -
Choubrac Leo,
Brammertz Guy,
Barreau Nicolas,
Arzel Ludovic,
Harel Sylvie,
Meuris Marc,
Vermang Bart
Publication year - 2018
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.201800043
Subject(s) - chemical bath deposition , materials science , raman spectroscopy , heterojunction , scanning electron microscope , optoelectronics , photovoltaic system , thin film , quantum efficiency , solar cell , deposition (geology) , thin film solar cell , nanotechnology , optics , composite material , physics , electrical engineering , paleontology , sediment , biology , engineering
In this study, CdS chemical bath deposition is investigated to improve the performance of thin film solar cell based on Cu 2 ZnGeSe 4 /CdS heterojunction. The influence of both the bath temperature and the dipping duration on the CdS thin film properties are explored thanks to the combination of scanning electron microscopy (SEM) and Raman spectroscopy, while the photovoltaic parameters of the resulting solar cells are discussed from current–voltage ( I–V ) and external quantum efficiency (EQE) measurements. The highest efficiency achieved herein (without antireflection coating) is 7.6%. Although it represents 35% relative improvement compared to previous best efficiency, this champion device is still limited by interface recombination. Different strategies are finally proposed to further increase the performance of these solar cells.