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Optical simulation

Numerical techniques are a powerful tool to speed up the development of effective light management architectures that improve solar cell performance. We mainly use the state-of-the-art time-harmonic finite element solver JCMsuite, which is developed by JCMwave GmbH, a spin-off of the Zuse Institute Berlin (ZIB). The strengths of the finite-element-method (FEM) and the JCMsuite-software are its outstanding accuracy and convergence, which can outperform comparable methods such as FDTD in respective benchmarks [1].

The Nano-SIPPE group is a founding partner of the Berlin Joint Lab for Optical Simulations for Energy Research (BerOSE) which was founded by HZB, ZIB and the Free University Berlin in 2014. BerOSE forms an ideal environment for the interaction between experts in 3D optical computation and scientists in the synthesis of nanostructured materials for solar electricity generation, energy storage and photonics.


Spectrum - enlarged view

Numerical and experimental 1 - R spectra for sinusoidally textured layer stacks. The shown data is for 750 nm pitch. Numerical results were calculated with the 0th - and 1st -order corrections [5]. The two corrections differ because not all diffraction orders that are present in glass can propagate into air. Simulation results are shown for two angles of incidence: θin = 0° (thin lines) and θin = 8° (thick lines). Experimental results were obtained with theta θin = 8°.