Opendata, web and dolomites


Carrier-selective contacts for silicon photovoltaics based on broadband-transparent oxides

Total Cost €


EC-Contrib. €






 COLIBRI project word cloud

Explore the words cloud of the COLIBRI project. It provides you a very rough idea of what is the project "COLIBRI" about.

contacts    crystalline    sources    photo    generate    enhancement    29    doped    surface    maximum    tunnelling    junction    fabrication    abundance    interface    eliminates    external    sun    absorption    transport    junctions    efficiencies    performance    reduce    layers    layer    toxicity    competitiveness    competiveness    minimized    lifetime    efficiency    passivating    pn    direct    30    optical    metal    decades    band    coupling    theoretical    carrier    perovskite    regular    paradigm    light    heterojunction    modules    passivation    transparent    structure    bandgap    cell    innovative    consist    cells    patterning    chemical    profitability    electricity    tandem    full    devoid    arising    optimized    gt    solar    contact    scheme    thereby    conductive    circuit    plate    intensive    optically    thick    flat    energy    mechanisms    broadband    moving    currents    nm    away    diffused    device    advantages    alignment    parasitic    oxide    contacting    tco    optimum    25    selective    sio2    voltages    photovoltaic    si    technique   

Project "COLIBRI" data sheet

The following table provides information about the project.


Organization address
address: BATIMENT CE 3316 STATION 1
postcode: 1015

contact info
title: n.a.
name: n.a.
surname: n.a.
function: n.a.
email: n.a.
telephone: n.a.
fax: n.a.

 Coordinator Country Switzerland [CH]
 Project website
 Total cost 175˙419 €
 EC max contribution 175˙419 € (100%)
 Programme 1. H2020-EU.1.3.2. (Nurturing excellence by means of cross-border and cross-sector mobility)
 Code Call H2020-MSCA-IF-2015
 Funding Scheme MSCA-IF-EF-ST
 Starting year 2016
 Duration (year-month-day) from 2016-06-01   to  2018-05-31


Take a look of project's partnership.

# participants  country  role  EC contrib. [€] 


 Project objective

This project aims at a cost-effective efficiency enhancement of Si solar cells towards their theoretical maximum of about 29% by moving away from the diffused-junction paradigm. This will reduce the energy fabrication costs on the €/kWh level and thereby increase the competiveness and profitability of photovoltaic systems. Crystalline Si (c-Si) solar cells are since decades the most established photovoltaic technology. Their main advantages are long lifetime (>25 years), non-toxicity and the high abundance of Si. However, for full competitiveness with traditional sources of electricity, important new steps need to be taken to increase their performance. An innovative contacting scheme will be developed that eliminates the main loss mechanisms in c-Si solar cells arising from doped pn-junctions and the direct contact of metal with Si. The novel contacts will be broadband optically transparent, generate a highly passivating and carrier-selective interface to Si and will enable solar cells without doped pn-junctions. No cost-intensive patterning technique is required for the device fabrication and parasitic optical absorption, as present in Si heterojunction solar cells, will be minimized. The novel contacts consist of three layers: a 1-2 nm thick tunnelling SiO2 layer for chemical passivation of the Si surface, a wide-bandgap conductive metal oxide layer providing a specific energy band alignment, and a highly conductive transparent oxide (TCO) for carrier transport to external metal contacts and optimum light coupling into the solar cell device. The contacts will be used for the fabrication of Si solar cells which are devoid of doped pn-junctions and achieve both high open-circuit voltages and photo currents. The structure of the photovoltaic device will be optimized for the application in regular 1-sun modules and for both III-V/Si and perovskite/Si tandem cell applications with potential for flat-plate efficiencies well above 30%.


year authors and title journal last update
List of publications.
2017 S. Essig, J. Dréon, J. Werner, P. Löper, S. De Wolf, M. Boccard, C. Ballif
MoOx and WOx based hole-selective contacts for wafer-based Si solar cells,
published pages: , ISSN: , DOI:
Proceedings of the 44th IEEE Photovoltaic Specialists Conference (PVSC-44) 2019-06-13
2017 Stephanie Essig, Christophe Allebé, Timothy Remo, John F. Geisz, Myles A. Steiner, Kelsey Horowitz, Loris Barraud, J. Scott Ward, Manuel Schnabel, Antoine Descoeudres, David L. Young, Michael Woodhouse, Matthieu Despeisse, Christophe Ballif & Adele Tamboli
Raising the one-sun conversion efficiency of III–V/Si solar cells to 32.8% for two junctions and 35.9% for three junctions
published pages: , ISSN: 2058-7546, DOI: 10.1038/nenergy.2017.144
Nature Energy 6, 17144 (2017) 2019-06-13
2017 James Bullock, Hiroki Ota, Hanchen Wang, Zhaoran Xu, Mark Hettick, Di Yan, Christian Samundsett, Yimao Wan, Stephanie Essig, Monica Morales-Masis, Andrés Cuevas, Ali Javey
Microchannel contacting of crystalline silicon solar cells
published pages: , ISSN: 2045-2322, DOI: 10.1038/s41598-017-08913-y
Scientific Reports 7/1 2019-06-13
2017 S. Essig, C. Allebé, J. F. Geisz, M. A. Steiner, L. Barraud, J. S. Ward, M. Schnabel, A. Descoeudres, D. L. Young, M. Despeisse, C. Ballif, A. Tamboli
Mechanically Stacked 4-terminal III-V/Si tandem solar cells
published pages: , ISSN: , DOI:
44th IEEE Photovoltaic Specialists Conference (PVSC-44) 2019-06-13

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The information about "COLIBRI" are provided by the European Opendata Portal: CORDIS opendata.

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