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