NDLI: Development of ZnTe intermediate band solar cells

Content Provider	IEEE Xplore Digital Library
Author	Tanaka, T. Kin Man Yu Stone, P. Beeman, J.W. Dubon, O. Reichertz, L.A. Kao, V.M. Nishio, M. Walukiewicz, W.
Copyright Year	2010
Description	Author affiliation: Department of Electrical and Electronic Engineering, Saga University, 840-8502, JAPAN (Nishio, M.) \|\| Materials Sciences Division, Lawrence Berkeley National Laboratory, CA 94720, U.S.A. (Tanaka, T.; Kin Man Yu; Stone, P.; Beeman, J.W.; Dubon, O.; Reichertz, L.A.; Kao, V.M.; Walukiewicz, W.)
Abstract	We describe the fabrication of ZnTe intermediate band solar cell (IBSC) using the combination of oxygen ion implantation and pulsed laser melting. Also, we report the first demonstration of homojunction ZnTe solar cells in which n-ZnTe layer is fabricated by thermal diffusion of Al into p-ZnTe. The preliminary results of the ZnTe IBSC are compared with the ZnTe cell. The homojunction ZnTe solar cells exhibited photovoltaic activity with an open circuit voltage of approximately 0.9 V and a maximum short circuit current (J) of 1.75 $mA/cm^{2}.$ J was found to depend strongly on the location of pn-junction, with shallower pn-junction depth, corresponding to higher J. Photo-modulated reflectance spectra of ZnTe, show two optical transitions from the valence band to the conduction subband $E^{+}$ (∼2.5 eV) and from the valence band to the intermediate band $E^{−}$ (∼1.7 eV). The external quantum efficiency of ZnTe solar cell clearly shows PV responses due to the transition from valence band to the two conduction subbands $(E^{−}$ and $E^{+})$ demonstrating the photovoltaic action through the intermediate band in this highly mismatched alloy.
Starting Page	002974
Ending Page	002977
File Size	583859
Page Count	4
File Format	PDF
ISBN	9781424458905
ISSN	01608371
e-ISBN	9781424458929
DOI	10.1109/PVSC.2010.5614215
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-06-20
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Photovoltaic cells Sun Photovoltaic systems Junctions Lighting Materials
Content Type	Text
Resource Type	Article
Subject	Industrial and Manufacturing Engineering Control and Systems Engineering Electrical and Electronic Engineering

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