NDLI: High-Efficiency Polycrystalline CdS/CdTe Solar Cells on Buffered Commercial TCO-Coated Glass

Content Provider	Springer Nature Link
Author	Colegrove, E. Banai, R. Blissett, C. Buurma, C. Ellsworth, J. Morley, M. Barnes, S. Gilmore, C. Bergeson, J. D. Dhere, R. Scott, M. Gessert, T. Sivananthan, Siva
Copyright Year	2012
Abstract	Multiple polycrystalline CdS/CdTe solar cells with efficiencies greater than 15% were produced on buffered, commercially available Pilkington TEC Glass at EPIR Technologies, Inc. (EPIR, Bolingbrook, IL) and verified by the National Renewable Energy Laboratory (NREL). n-CdS and p-CdTe were grown by chemical bath deposition (CBD) and close space sublimation, respectively. Samples with sputter-deposited CdS were also investigated. Initial results indicate that this is a viable dry-process alternative to CBD for production-scale processing. Published results for polycrystalline CdS/CdTe solar cells with high efficiencies are typically based on cells using research-grade transparent conducting oxides (TCOs) requiring high-temperature processing inconducive to low-cost manufacturing. EPIR’s results for cells on commercial glass were obtained by implementing a high-resistivity SnO$_{2}$ buffer layer and by optimizing the CdS window layer thickness. The high-resistivity buffer layer prevents the formation of CdTe-TCO junctions, thereby maintaining a high open-circuit voltage and fill factor, whereas using a thin CdS layer reduces absorption losses and improves the short-circuit current density. EPIR’s best device demonstrated an NREL-verified efficiency of 15.3%. The mean efficiency of hundreds of cells produced with a buffer layer between December 2010 and June 2011 is 14.4%. Quantum efficiency results are presented to demonstrate EPIR’s progress toward NREL’s best-published results.
Starting Page	2833
Ending Page	2837
Page Count	5
File Format	PDF
ISSN	03615235
Journal	Journal of Electronic Materials
Volume Number	41
Issue Number	10
e-ISSN	1543186X
Language	English
Publisher	Springer US
Publisher Date	2012-05-01
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	CdTe CdS polycrystalline solar Buffer layer TCO commercial Electronics and Microelectronics, Instrumentation Characterization and Evaluation of Materials Solid State Physics Optical and Electronic Materials
Content Type	Text
Resource Type	Article
Subject	Materials Chemistry Electronic, Optical and Magnetic Materials Condensed Matter Physics Electrical and Electronic Engineering

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Optical properties of CdS$_{x}$Te$_{1−x}$ polycrystalline thin films

Simulation of Current Transport in Polycrystalline CdTe Solar Cells

Low-Pressure Chemical Vapor Deposition of CdS and Atomic Layer Deposition of CdTe Films for HgCdTe Surface Passivation

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Understanding the Evolution of CdTe Buffer Layer Surfaces on ZnTe/Si(211) and GaAs(211)B During Cyclic Annealing

High-Efficiency Polycrystalline CdS/CdTe Solar Cells on Buffered Commercial TCO-Coated Glass

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