Community Research and Development Information Service - CORDIS

Abstract

Volume phase holograms are well suited for spectrum splitting applications. They are recorded by laser beam interference in dichromated gelatin layers of about 15 mum thickness, flat plates acting as diffraction gratings or dispersive lenses. The holographic elements show a typical wavelength selectivity; two or more can be stored in the same layer. The wavelength of maximum diffraction efficiency and the spectral bandwidth can be varied by various parameters, in this way the features of the hologram can be adapted to the solar cell data. To demonstrate the effectivity of holographic optical elements in solar power generation, spectral distributions of the diffracted and undiffracted light are calculated for various types of holograms. In combination with ideal solar cells, the hologram data and cell band gaps are optimized for max. conversion efficiency. To calculate the conversion efficiency of a tandem system under real conditions a model is used which takes into account the measured I-V characteristics and spectral quantum efficiencies. With this model a system is simulated consisting of a Si cell and a GlAlAs cell. The conversion efficiency of this system is 17.8%.

Additional information

Authors: BLOSS W H, INSTITUT FUR PHYSIKALISCHE ELEKTRONIK, UNIVERSITAT STUTTGART (GERMANY);GRIESINGER M, INSTITUT FUR PHYSIKALISCHE ELEKTRONIK, UNIVERSITAT STUTTGART (GERMANY);LAUB G, INSTITUT FUR PHYSIKALISCHE ELEKTRONIK, UNIVERSITAT STUTTGART (GERMANY);REINHARDT E R INSTITUT FUR PHYSIKALISCHE ELEKTRONIK, UNIVERSITAT STUTTGART (GERMANY), INSTITUT FUR PHYSIKALISCHE ELEKTRONIK, UNIVERSITAT STUTTGART (GERMANY)
Bibliographic Reference: EUR 9840 EN (1985) MF, 55 P., BFR 150, BLOW-UP COPY BFR 275, EUROFFICE, LUXEMBOURG, POB 1003
Availability: Can be ordered online
Record Number: 1989124005200 / Last updated on: 1987-01-01
Category: PUBLICATION
Available languages: en