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Intermediate reflectors for enhanced top cell performance in photovoltaic thin-film tandem cells

Bielawny, A.; Rockstuhl, C.; Lederer, F.; Wehrspohn, R.B.

We have investigated the impact of three types of intermediate reflectors on the absorption enhancement in the top cell of micromorph tandem solar cells using rigorous diffraction theory. As intermediate reflectors we consider homogenous dielectric thin-films and 1D and 3D photonic crystals. Besides the expected absorption enhancements in cases where photonic band gaps are matched to the absorption edge of the semiconductor, our results distinguish between the impact of zero order Bragg-resonances and diffraction-based enhancement at larger lattice constants of the 3D photonic crystal. Our full-spectrum analysis permits for a quantitative prediction of the photovoltaic conversion efficiency increase of the a-Si:H top cell.

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Verlagsausgabe §
DOI: 10.5445/IR/1000040794
Veröffentlicht am 11.04.2018
DOI: 10.1364/OE.17.008439
Zitationen: 61
Web of Science
Zitationen: 50
Zitationen: 51
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Theoretische Festkörperphysik (TFP)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2009
Sprache Englisch
Identifikator ISSN: 1094-4087
KITopen-ID: 1000040794
Erschienen in Optics express
Verlag The Optical Society of America (OSA)
Band 17
Heft 10
Seiten 8439-8446
Nachgewiesen in Dimensions
Web of Science
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