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Rear textured p-type high temperature passivating contacts and their implementation in perovskite/silicon tandem cells

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Semi-transparent perovskite solar cells for tandems with silicon and CIGS

Michael Graetzel, Norman Pellet, Julian Burschka

A promising approach for upgrading the performance of an established low-bandgap solar technology without adding much cost is to deposit a high bandgap polycrystalline semiconductor on top to make a tandem solar cell. We use a transparent silver nanowire e ...

Royal Society of Chemistry2015

Highly transparent modulated surface textured front electrodes for high-efficiency multijunction thin-film silicon solar cells

Christophe Ballif, Franz-Josef Haug, Michael Elias Stückelberger, Etienne Antoine Julien Moulin, Hairen Tan

To further increase the efficiency of multijunction thin-film silicon (TF-Si) solar cells, it is crucial for the front electrode to have a good transparency and conduction, to provide efficient light trapping for each subcell, and to ensure a suitable morp ...

Wiley-Blackwell2015

Lanthanides in Solar Energy Conversion

Jean-Claude Bünzli, Anne-Sophie Chauvin

Solar energy represents an abundant (1000 W·m-2) and seemingly cheap source of energy. One way to tap it is to transform light into electricity with photovoltaic devices. Single junction solar cells presently reach 32% conversion yield under 1-sun illumina ...

Elsevier Science B.V.2014

Hydrogenated amorphous silicon

Michael Elias Stückelberger

Thin-film silicon solar cells are one possible answer to the increasing energy demand of today. Hydrogenated amorphous silicon (a-Si:H) plays a crucial role therein - as absorber layers, but also as doped layers to build p-i -n junctions. This thesis is de ...

EPFL2014

Passivating contacts for homojunction solar cells using a-Si:H/c-Si hetero-interfaces

Bénédicte Demaurex

Crystalline silicon (c-Si) homojunction solar cells account for over 90% of the current photovoltaic market. However, further progress of this technology is limited by recombinative losses occurring at their metal-semiconductor contacts. The goal of this t ...

EPFL2014

Electrically flat/optically rough substrates for efficiencies above 10% in n-i-p thin-film silicon solar cells

Christophe Ballif, Franz-Josef Haug, Grégory Bugnon, Karin Söderström

Substrates with extremely low roughness to allow the growth of good-quality silicon material but that nevertheless present high light trapping properties are presented. In a first application, silver reflectors are used in single and tandem-junction amorph ...

2012

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In this contribution, the replication of nano-textures enhancing the short circuit current of thin film silicon solar cells onto low cost substrates (glass or PolyEthylene Naphtalate (PEN)) is studied. Optical and morphological analysis is performed to ass ...

2010

This work evaluated the possibility of using silicon solar cells as load-carrying elements in composite sandwich structures. Such an ultra-light multifunctional structure is a new concept enabling weight, and thus energy, to be saved in high-tech applicati ...

Elsevier2009

Single and multi-junction thin film silicon solar cells for flexible photovoltaics

Thomas Söderström

This thesis investigates amorphous (a-Si:H) and microcrystalline (μc-Si:H) solar cells deposited by very high frequency plasma enhanced chemical vapor deposition (VHF-PECVD) in the n-i-p or substrate configuration. It focuses on processes that allow the us ...

University of Neuchâtel2009

Production volume of PV modules increases at > 35% per year, but one is yet far from making a global impact on energy supply. One of the obstacles is given by the present high production costs of PV modules. A possibility to reduce costs are thin-film PV m ...

2006