High quality baseline for high efficiency, Cu(In1−x,Gax)Se2 solar cells

We report on the progress that we have made in the quality of our baseline process for the production of high efficiency soda lime glass/Mo/Cu(In,Ga)Se2 (CIGS)/CdS/i‐ZnO/ZnO:Al/MgF2 solar cells. The enhancement of the average performance level has enabled us to reach conversion efficiencies of up to...

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Veröffentlicht in:Progress in photovoltaics 2007-09, Vol.15 (6), p.507-519
Hauptverfasser: Jackson, Philip, Würz, Roland, Rau, Uwe, Mattheis, Julian, Kurth, Matthias, Schlötzer, Thomas, Bilger, Gerhard, Werner, Jürgen H.
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container_end_page 519
container_issue 6
container_start_page 507
container_title Progress in photovoltaics
container_volume 15
creator Jackson, Philip
Würz, Roland
Rau, Uwe
Mattheis, Julian
Kurth, Matthias
Schlötzer, Thomas
Bilger, Gerhard
Werner, Jürgen H.
description We report on the progress that we have made in the quality of our baseline process for the production of high efficiency soda lime glass/Mo/Cu(In,Ga)Se2 (CIGS)/CdS/i‐ZnO/ZnO:Al/MgF2 solar cells. The enhancement of the average performance level has enabled us to reach conversion efficiencies of up to 19·3% (internal measurement). The new quality initiative uses process control, optical and electrical modelling, and the critical revision of all process steps as tools for the attainment of the 19% efficiency level. Our experiments show that the compositional process window for CIGS solar cells that have an efficiency of η ≈ 19% is very wide. Accordingly, we suggest that an efficiency of 19·0–19·5% is achievable in the following compositional process windows: 0·69 ≤ Cu/(Ga + In) ≤ 0·98 and 0·21 ≤ Ga/(Ga + In) ≤ 0·38. In addition, our results show that large CIGS grains are not a necessary requirement for high efficiencies up to 19%. These findings and the partly lacking ability to correlate certain aspects of our progress with experimental parameters lead us to the conclusion that there are still some important process variables undiscovered. From this conclusion and from the evaluation of the available data we infer that there is a potential for the enhancement of CIGS solar cell efficiencies beyond 20%. Copyright © 2007 John Wiley & Sons, Ltd.
doi_str_mv 10.1002/pip.757
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The enhancement of the average performance level has enabled us to reach conversion efficiencies of up to 19·3% (internal measurement). The new quality initiative uses process control, optical and electrical modelling, and the critical revision of all process steps as tools for the attainment of the 19% efficiency level. Our experiments show that the compositional process window for CIGS solar cells that have an efficiency of η ≈ 19% is very wide. Accordingly, we suggest that an efficiency of 19·0–19·5% is achievable in the following compositional process windows: 0·69 ≤ Cu/(Ga + In) ≤ 0·98 and 0·21 ≤ Ga/(Ga + In) ≤ 0·38. In addition, our results show that large CIGS grains are not a necessary requirement for high efficiencies up to 19%. These findings and the partly lacking ability to correlate certain aspects of our progress with experimental parameters lead us to the conclusion that there are still some important process variables undiscovered. 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Photovolt: Res. Appl</addtitle><description>We report on the progress that we have made in the quality of our baseline process for the production of high efficiency soda lime glass/Mo/Cu(In,Ga)Se2 (CIGS)/CdS/i‐ZnO/ZnO:Al/MgF2 solar cells. The enhancement of the average performance level has enabled us to reach conversion efficiencies of up to 19·3% (internal measurement). The new quality initiative uses process control, optical and electrical modelling, and the critical revision of all process steps as tools for the attainment of the 19% efficiency level. Our experiments show that the compositional process window for CIGS solar cells that have an efficiency of η ≈ 19% is very wide. Accordingly, we suggest that an efficiency of 19·0–19·5% is achievable in the following compositional process windows: 0·69 ≤ Cu/(Ga + In) ≤ 0·98 and 0·21 ≤ Ga/(Ga + In) ≤ 0·38. In addition, our results show that large CIGS grains are not a necessary requirement for high efficiencies up to 19%. These findings and the partly lacking ability to correlate certain aspects of our progress with experimental parameters lead us to the conclusion that there are still some important process variables undiscovered. From this conclusion and from the evaluation of the available data we infer that there is a potential for the enhancement of CIGS solar cell efficiencies beyond 20%. Copyright © 2007 John Wiley &amp; Sons, Ltd.</description><subject>Applied sciences</subject><subject>composition</subject><subject>Cu(In</subject><subject>Cu(In,Ga)Se2</subject><subject>Energy</subject><subject>Exact sciences and technology</subject><subject>Ga)Se2</subject><subject>high efficiencies</subject><subject>Natural energy</subject><subject>Photovoltaic conversion</subject><subject>Solar cells. 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subjects Applied sciences
composition
Cu(In
Cu(In,Ga)Se2
Energy
Exact sciences and technology
Ga)Se2
high efficiencies
Natural energy
Photovoltaic conversion
Solar cells. Photoelectrochemical cells
Solar energy
structural properties
thin film solar cells
title High quality baseline for high efficiency, Cu(In1−x,Gax)Se2 solar cells
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