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Evaluating the economic viability of CdTe/CIS and CIGS/CIS tandem photovoltaic modules

Journal Article · · Progress in Photovoltaics
DOI:https://doi.org/10.1002/pip.2849· OSTI ID:1351875

In this paper, we analyze the potential cost competitiveness of two frameless, glass–glass thin-film tandem photovoltaic module structures, cadmium telluride (CdTe)/CuInSe2 (CIS) and CuIn0.3Ga0.7Se2 (CIGS)/CIS, based on the demonstrated cost of manufacturing the respective component cell technologies in high volume. To consider multiple economic scenarios, we base the CdTe/CIS module efficiency on the current industrial production of CdTe modules, while for CIGS/CIS, we use an aspirational estimate for CIGS efficiency. We focus on four-terminal mechanically stacked structures, thus avoiding the need to achieve current matching between the two cells. The top cell in such a tandem must have a transparent back contact, which has not been successfully implemented to date. However, for the purpose of understanding the economic viability of both tandems, we assume that this can be implemented at a cost similar to that of sputtered indium tin oxide. The cost of both tandem module structures was found to be nearly identical on an equal-area basis and approximately $30/m2 higher than the single-junction alternatives. Both tandem modules are about 4% (absolute) more efficient than a module by using the top-cell material alone. We find that these tandem modules might reduce total system cost by as much as 11% in applications having a high area-related balance-of-system cost, such as area-constrained residential systems; however, the relative advantage of tandems decreases in the cases where balance-of-system costs are lower, such as in commercial and utility scale systems.

Research Organization:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Solar Energy Technologies Office (EE-4S)
Grant/Contract Number:
AC36-08GO28308
OSTI ID:
1351875
Alternate ID(s):
OSTI ID: 1351874
Report Number(s):
NREL/JA--5K00-65845
Journal Information:
Progress in Photovoltaics, Journal Name: Progress in Photovoltaics Journal Issue: 4 Vol. 25; ISSN 1062-7995
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English

References (24)

New world record efficiency for Cu(In,Ga)Se2 thin-film solar cells beyond 20% journal January 2011
Wide bandgap Cu(In,Ga)Se 2 solar cells with improved energy conversion efficiency : Wide bandgap Cu(In,Ga)Se
  • Contreras, Miguel A.; Mansfield, Lorelle M.; Egaas, Brian
  • Progress in Photovoltaics: Research and Applications, Vol. 20, Issue 7 https://doi.org/10.1002/pip.2244
journal June 2012
Tracking US photovoltaic system prices 1998-2012: a rapidly changing market: Tracking US photovoltaic system prices 1998-2012
  • Barbose, Galen; Darghouth, Naïm Richard; Weaver, Samantha
  • Progress in Photovoltaics: Research and Applications, Vol. 23, Issue 6 https://doi.org/10.1002/pip.2482
journal March 2014
Solar cell efficiency tables (version 47): Solar cell efficiency tables journal November 2015
Technology advances needed for photovoltaics to achieve widespread grid price parity: Widespread grid price parity for photovoltaics journal April 2016
Economic competitiveness of III-V on silicon tandem one-sun photovoltaic solar modules in favorable future scenarios: Economic competitiveness of III-V on on silicon tandem modules journal September 2016
Modeled performance of polycrystalline thin-film tandem solar cells
  • Coutts, Timothy J.; Emery, Keith A.; Scott Ward, J.
  • Progress in Photovoltaics: Research and Applications, Vol. 10, Issue 3 https://doi.org/10.1002/pip.419
journal January 2002
Encapsulation of PV modules using ethylene vinyl acetate copolymer as a pottant: A critical review journal September 1996
Numerical Simulation of CGS/CIGS Single and Tandem Thin-film Solar Cells using the Silvaco-Atlas Software journal August 2015
II–VI compounds as the top absorbers in tandem solar cell structures journal February 2005
Perspectives on the pathways for cadmium telluride photovoltaic module manufacturers to address expected increases in the price for tellurium journal August 2013
A wafer-based monocrystalline silicon photovoltaics road map: Utilizing known technology improvement opportunities for further reductions in manufacturing costs journal July 2013
Effect of band mismatch on minority carrier transport in heterojunction solar cells journal October 2014
The potential of textured front ZnO and flat TCO/metal back contact to improve optical absorption in thin Cu(In,Ga)Se2 solar cells journal May 2007
Transparent CdTe solar cells with a ZnO:Al back contact journal December 2013
Optimization of CIGS-Based PV Device through Antimony Doping journal January 2010
High-Performance, Transparent, and Stretchable Electrodes Using Graphene–Metal Nanowire Hybrid Structures journal May 2013
Utility-scale solar PV performance enhancements through system-level modifications journal June 2020
29.5%‐efficient GaInP/GaAs tandem solar cells journal August 1994
Over 30% efficient InGaP/GaAs tandem solar cells journal January 1997
Indium-Gallium Segregation in CuIn x Ga 1 − x Se 2 : An Ab Initio –Based Monte Carlo Study journal July 2010
Design of CdZnTe and Crystalline Silicon Tandem Junction Solar Cells journal January 2016
Nonvacuum Solution Synthesis of (Ag,Cu)(In,Ga)Se 2 Absorbers for Applications in Thin-Film Solar Cells journal September 2015
Cu(In1-x, Gax)Se2-Based Thin Film Solar Cells Using Transparent Conducting Back Contacts journal November 2002

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