Fraunhofer-Gesellschaft

Publica

Hier finden Sie wissenschaftliche Publikationen aus den Fraunhofer-Instituten.

On the temperature dependence of dual-junction laser power converters

 
: Reichmuth, S.K.; Helmers, H.; Philipps, S.P.; Schachtner, M.; Siefer, G.; Bett, A.W.

:
Fulltext urn:nbn:de:0011-n-4230227 (953 KByte PDF)
MD5 Fingerprint: 46d5f33fd49690de3682f97345236080
(CC) by-nc
Created on: 1.3.2017

Fulltext ()

Progress in Photovoltaics 25 (2017), No.1, pp.67-75
ISSN: 1062-7995
English
Journal Article, Electronic Publication
Fraunhofer ISE ()
Materialien - Solarzellen und Technologie; Photovoltaik; III-V und Konzentrator-Photovoltaik; Servicebereiche; Power-by-Light; CalLab PV Cells; multi-junction; power-by-light; dependence; matching; coupling

Abstract
Dual-junction GaAs laser power converters optimized for one monochromatic wavelength are presented, and their temperature dependence is experimentally evaluated. External quantum efficiency and irradiance-dependent current-voltage measurements (10 to 104W/cm2) under monochromatic laser light (809nm) have been undertaken to quantify temperature- and irradiance-dependent effects on the performance. The temperature dependence of the current matching of the two subcells, caused by the temperature-dependent absorbance, is quantified. Losses in performance due to variations in operating temperature for different power-by-light applications are calculated to be between 16.2% and 21.0%. Future potential enhancements in cell performance are discussed. For elevated temperatures, super-linear behavior of the spectral response with increasing irradiance is observed, which is attributed to effective luminescent coupling from the top to the bottom subcell as the device becomes more radiative limited.

: http://publica.fraunhofer.de/documents/N-423022.html