Prof. Christiane Becker Profile

Prof. Christiane Becker

at Helmholtz-Zentrum Berlin

SPIE Involvement:

Author

Publications (10)

PROCEEDINGS ARTICLE | May 22, 2018

Antireflective nanotextures for monolithic perovskite-silicon tandem solar cells

Proc. SPIE. 10688, Photonics for Solar Energy Systems VII

KEYWORDS: Antireflective coatings, Solar cells, Silicon, Reflectivity, Finite element methods, Tandem solar cells, Absorption, Perovskite

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SPIE Journal Paper | March 30, 2018

Nanophotonic light management for perovskite–silicon tandem solar cells

Chen, Duote , Manley, Phillip , Tockhorn, Philipp , Eisenhauer, David , Köppel, Grit , Hammerschmidt, Martin , Burger, Sven , Albrecht, Steve , Becker, Christiane , Jäger, Klaus

JPE Vol. 8 Issue 02

KEYWORDS: Perovskite, Tandem solar cells, Solar cells, Silicon, Absorption, Nanophotonics, Finite element methods, Computer architecture, Fourier transforms, Crystals

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PROCEEDINGS ARTICLE | August 30, 2017

Optical simulations of advanced light management for liquid-phase crystallized silicon thin-film solar cells

Proc. SPIE. 10356, Nanostructured Thin Films X

KEYWORDS: Refractive index, Solar cells, Silicon, Silicon films, Finite element methods, Optical simulations, Nanoimprint lithography, Nanolithography

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PROCEEDINGS ARTICLE | April 29, 2016

Sinusoidal gratings for optimized light management in c-Si thin-film solar cells

Proc. SPIE. 9898, Photonics for Solar Energy Systems VI

KEYWORDS: Thin films, Refractive index, Antireflective coatings, Polarization, Solar cells, Interfaces, Silicon, Numerical simulations, Thin film solar cells, Thin film solar cells, Finite element methods, Diffraction gratings, Absorption, Maxwell's equations

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PROCEEDINGS ARTICLE | April 18, 2016

Numerical characterization of symmetry properties for photonic crystals with hexagonal lattice

Proc. SPIE. 9885, Photonic Crystal Materials and Devices XII

KEYWORDS: Mirrors, Radon, Photon polarization, Matrices, Dielectrics, Light scattering, Photonic crystals, Computer simulations, Neodymium, Electroluminescent displays, Evanescent wave coupling, Dielectric polarization, Band structure simulations, Maxwell's equations

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PROCEEDINGS ARTICLE | March 14, 2016

Reconstruction of photonic crystal geometries using a reduced basis method for nonlinear outputs

Proc. SPIE. 9756, Photonic and Phononic Properties of Engineered Nanostructures VI

KEYWORDS: Silicon, Reflectivity, Photonic crystals, Solids, Finite element methods, Chemical elements, Electromagnetism, Electroluminescent displays, Electromagnetic scattering, Resonance enhancement

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PROCEEDINGS ARTICLE | May 15, 2014

Computational analysis of triangular and honeycomb lattice-structured tapered nanoholes for enhanced light trapping in thin-film Si solar cells

Proc. SPIE. 9140, Photonics for Solar Energy Systems V

KEYWORDS: Thin films, Glasses, Solar cells, Crystals, Silicon, Photonic crystals, Thin film solar cells, Silicon films, Chemical elements, Absorption

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For an optimized light harvesting while using diverse periodic photonic light-trapping architectures in low cost thin film crystalline silicon (c-Si) solar cells, it is also of prime importance to tune the features of their lattice point basis structure. In view of this, tapered nanoholes would be of importance for envisaged better light in-coupling due to graded index effect and also from the point of fabrication feasibility. Using a 3D finite element method based computational simulator, we investigate the basis structural influence of triangular as well as honeycomb lattice-structured experimentally feasible tapered air nanoholes in ~400 nm thick c-Si absorber on a glass substrate. We present a detailed convergence analysis of volume absorption in Si absorber with cylindrical as well as tapered nanoholes. For a wavelength rage of 300 nm to 1100 nm, we present the computed results on light absorption of the engineered Si nanoholes for a lattice periodicity of 600nm. In particular, we study the influence of tapering angle of engineered nano air holes in Si thin film for the absorption enhancement in photonic triangular and honeycomb lattice structured tapered nanoholes. Further we make a comparative analysis of cylindrical and tapered nanoholes for a range of light incident angles from 0° to 60°. For the presented triangular as well as honeycomb lattice structured nanoholes, we observe that in comparison to the cylindrical nanoholes, the tapered nanoholes perform better in terms of light trapping for enhanced light absorption in textured Si thin films even when the effective volume fraction of Si is lower in the absorber layer with tapered nanoholes in comparison to that of cylindrical ones. From the maximum achievable short circuit current density estimation in the present study, the performance of c-Si absorbing layer engineered with triangular lattice structured tapered air holes harvests light efficiently owing to its higher lattice symmetry among periodic structures as well as graded index effect of the tapered nanoholes.

PROCEEDINGS ARTICLE | May 15, 2014

Light harvesting quasicrystalline nanophotonic structures for crystalline silicon thin-film solar cells

Proc. SPIE. 9140, Photonics for Solar Energy Systems V

KEYWORDS: Thin films, Nanostructures, Photovoltaics, Crystals, Silicon, Thin film solar cells, Silicon films, Nanophotonics, Light harvesting, Absorption

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