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Title: Non-Linear Luminescent Coupling in Series-Connected Multijunction Solar Cells

Journal Article · · Applied Physics Letters
DOI:https://doi.org/10.1063/1.4729827· OSTI ID:1045731

The assumption of superposition or linearity of photocurrent with solar flux is widespread for calculations and measurements of solar cells. The well-known effect of luminescent coupling in multijunction solar cells has also been assumed to be linear with excess current. Here we show significant non-linearities in luminescent coupling in III-V multijunction solar cells and propose a simple model based on competition between radiative and nonradiative processes in the luminescent junction to explain these non-linearities. We demonstrate a technique for accurately measuring the junction photocurrents under a specified reference spectrum, that accounts for and quantifies luminescent coupling effects.

Research Organization:
National Renewable Energy Laboratory (NREL), Golden, CO (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Solar Energy Technologies Office
DOE Contract Number:
AC36-08GO28308
OSTI ID:
1045731
Report Number(s):
NREL/JA-5200-54916; APPLAB; TRN: US201215%%114
Journal Information:
Applied Physics Letters, Vol. 100, Issue 25; Related Information: Article No. 251106; ISSN 0003-6951
Country of Publication:
United States
Language:
English

References (16)

Photon recycling and Shockley’s diode equation journal October 1997
Self‐absorption effects on the radiative lifetime in GaAs‐GaAlAs double heterostructures journal February 1977
Inhibited and Enhanced Spontaneous Emission from Optically Thin AlGaAs/GaAs Double Heterostructures journal November 1988
Limiting efficiencies of ideal single and multiple energy gap terrestrial solar cells journal August 1980
Limiting efficiencies for photovoltaic energy conversion in multigap systems journal September 1996
High-efficiency GaInP∕GaAs∕InGaAs triple-junction solar cells grown inverted with a metamorphic bottom junction journal July 2007
40.8% efficient inverted triple-junction solar cell with two independently metamorphic junctions journal September 2008
40% efficient metamorphic GaInP∕GaInAs∕Ge multijunction solar cells journal April 2007
Current-matched triple-junction solar cell reaching 41.1% conversion efficiency under concentrated sunlight journal June 2009
Detailed modelling of photon recycling: application to GaAs solar cells journal May 2006
Characterization of photon recycling in thin crystalline GaAs light emitting diodes journal August 1995
Effects of optical coupling in III-V multilayer systems journal May 2007
The Physics of Solar Cells book January 2003
Luminescence of zinc doped solution grown gallium arsenide journal July 1967
Primary reference cell calibrations, at SERI: history and methods conference January 1990
Reflection–transmission photoellipsometry: theory and experiments journal January 1995