NDLI: Improvement of VOC in Cu2ZnSnS4 monograin layer solar cells with tin oxide inter-layer

Content Provider	IEEE Xplore Digital Library
Author	Ernits, K. Neubauer, C. Li Xianglin Wong, L.H. Meissner, D. Neisser, A.
Copyright Year	2015
Description	Author affiliation: Energy Res. Inst., Nanyang Technol. Univ., Singapore, Singapore (Li Xianglin; Wong, L.H.) \|\| Crystalsol OU, Tallinn, Estonia (Ernits, K.; Neubauer, C.; Meissner, D.; Neisser, A.)
Abstract	To verify the positive effect of thin tin oxide layer on the surface of CZTS to solar cell $V_{OC},$ a thin layer of $SnO_{x}$ was deposited onto the CZTS mono grains by ALD. For confirmation of the effect, the $SnO_{x}$ layer was tested in combination with two different buffer materials - CBD CdS and ZnO,S. The deposition of a $SnO_{x}$ inter-layer resulted in increased $V_{OC}$ of CZTS/CdS solar cell from 666 mV to 724 mV and CZTS/ZnO,S solar cell from 617 mV to 719 mV. The tin oxide layer did not affect the FF and jSC values, so the improvement in $V_{OC}$ led to a direct improvement in CZTS/CdS solar cell PCE. EQE measurements did not show any shift in material absorption edge/band gap, hence the $V_{OC}$ increase can be fully attributed to the interface improvements, like to a reduced interface recombination rate. Apparently the additional $SnO_{x}$ layer seems to allow for better collection of the carriers at longer wavelength region (650 nm - 750 nm).
Starting Page	1
Ending Page	4
File Size	840243
Page Count	4
File Format	PDF
e-ISBN	9781479979448
DOI	10.1109/PVSC.2015.7356187
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-06-14
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Photovoltaic cells Buffer layers Optical buffering Radiative recombination Optical variables measurement Tin Photonic band gap tin oxide CZTS kesterite mono grain layer solar cell open circuit voltage charge carrier barrier
Content Type	Text
Resource Type	Article

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