Improved properties of phosphor-filled luminescent down-shifting layers: Reduced scattering, optical model, and optimization for PV application

Beitrag bei einer Tagung
(Konferenzbeitrag)


Details zur Publikation

Autor(en): Solodovnyk A, Lipovsek B, Forberich K, Stern E, Krc J, Batentschuk M, Topic M, Brabec C
Verlag: SPIE
Jahr der Veröffentlichung: 2015
Band: 9668
ISBN: 9781628418903
Sprache: Englisch


Abstract


We studied the optical properties of polymer layers filled with phosphor particles in two aspects. First, we used two different polymer binders with refractive indices n = 1.46 and n = 1.61 (λ = 600 nm) to decrease Δn with the phosphor particles (n = 1.81). Second, we prepared two particle size distributions D50 = 12 μm and D50 = 19 μm. The particles were dispersed in both polymer binders in several volume concentrations and coated onto glass with thicknesses of 150-600 μm. We present further a newly developed optical model for simulation and optimization of such luminescent down-shifting (LDS) layers. The model is developed within the ray tracing framework of the existing optical simulator CROWM (Combined Ray Optics/Wave Optics Model), which enables simulation of standalone LDS layers as well as complete solar cells (including thick and thin layers) enhanced by the LDS layers for an improved solar spectrum harvesting. Experimental results and numerical simulations show that the layers of the higher refractive index binder with larger particles result in the highest optical transmittance in the visible light spectrum. Finally we proved that scattering of the phosphor particles in the LDS layers may increase the overall light harvesting in the solar cell. We used numerical simulations to determine optimal layer composition for application in realistic thin-film photovoltaic devices. Surprisingly LDS layers with lower measured optical transmittance are more efficient when applied onto the solar cells due to graded refractive index and efficient light scattering. Therefore, our phosphor-filled LDS layers could possibly complement other light-coupling techniques in photovoltaics.



FAU-Autoren / FAU-Herausgeber

Batentschuk, Miroslaw PD Dr.-Ing.
Lehrstuhl für Werkstoffwissenschaften (Materialien der Elektronik und der Energietechnologie)
Brabec, Christoph Prof. Dr.
Lehrstuhl für Werkstoffwissenschaften (Materialien der Elektronik und der Energietechnologie)
Forberich, Karen Dr.
Lehrstuhl für Werkstoffwissenschaften (Materialien der Elektronik und der Energietechnologie)


Autor(en) der externen Einrichtung(en)
Bayerisches Zentrum für Angewandte Energieforschung e.V. (ZAE Bayern)
University of Ljubljana (UL) / Univerza v Ljubljani


Zitierweisen

APA:
Solodovnyk, A., Lipovsek, B., Forberich, K., Stern, E., Krc, J., Batentschuk, M.,... Brabec, C. (2015). Improved properties of phosphor-filled luminescent down-shifting layers: Reduced scattering, optical model, and optimization for PV application. Sydney, AU: SPIE.

MLA:
Solodovnyk, Anastasiia, et al. "Improved properties of phosphor-filled luminescent down-shifting layers: Reduced scattering, optical model, and optimization for PV application." Proceedings of the SPIE Micro+Nano Materials, Devices, and Applications Symposium, Sydney SPIE, 2015.

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Zuletzt aktualisiert 2018-24-11 um 13:50