Search documents

Browse topics

Document details

Analytical Framework for the Assessment and Modelling of Multi-Junction Solar Cells
C.S. Schuster
Multijunction Solar Cell, Solar Radiation, Modelling / Modeling
New Materials and Concepts for Photovoltaic Devices
Subtopic: Fundamental Studies
Event: 36th European Photovoltaic Solar Energy Conference and Exhibition
Session: 1BV.3.12
64 - 67
ISBN: 3-936338-60-4
Paper DOI: 10.4229/EUPVSEC20192019-1BV.3.12
0,00 EUR
Document(s): paper, poster


The detailed evaluation of solar cells typically involves a computationally intensive modelling approach. While the complexity of the optical analysis scales with the number of material layers, analytical solutions for the power conversion efficiency generally come with restrictive model assumptions. Here, an explicit equation is proposed for the filling-factor via the voltage at the maximum power point and which is free of parameter assumptions. The conversion efficiency can thus be calculated directly without numerical procedures. In addition, absorption matrices are introduced in the geometric optics regime to facilitate a multi-layer analysis under incoherent sunlight. The framework is then applied to study the harvesting efficiencies of a high-performing industrial solar cell, a siliconperovskite tandem system and of ideal multi-junction devices for four different climatic zones on Earth. By combining satellite-retrieved datasets, historical, global (hemispherical) solar spectra were therefore reconstructed at a 1-min temporal and 1-nm spectral resolution on latitude-tilted planes and for a 14-year period.