Next-generation interdigitated back-contacted silicon heterojunction solar cells and modules by design and process innovations

Deliverables

Report on the breakdown of optical and electrical losses in IBC-SHJ solar cells and optimization strategies

Quantitative loss analysis (parasitic absorption, resistive losses, and optical reflection) relying on the results from advanced characterization methods, including photoelectron yield spectroscopy, will address interface defects (with sensitivity better than 1 defect per 1000 atoms) and resulting recombination losses at the cSi interfaces, limiting the achievable Voc and efficiency.

Fabrication and delivery of 2500 high quality n-type Cz wafer per year

A total of 5000 high-quality c-Si wafers will be fabricated in two batches of 2500 (within M12 and within M24). Lifetime over resistivity ratio and resistivity will be constantly monitored to be higher than 2 ms/Ohm.cm and in the range between 1 – 2 ohm.cm, respectively.

Reports on optical characterization of comb finger shapes with guidelines for use by other WPs

The work aims to provide non-contact tool for optimization of the IBC scheme. Its sensitivity (estimated at thickness resolution to below 1 nm) and spatial resolution limits (below 500 nm) will be assessed on both smooth and rough test samples for a-Si:H as well as novel mate-rials for contact stacks (doped mc-Si:H and mc-SiOx:H, TMOs).

Textured c-Si exhibiting low reflectance (<5%) and implied current density beyond 41.5 mA/cm2

Textured c-Si wafers enable the optimal absorption of light inside the solar cell. Single and double-side pyramidal texturing and single sided modulated surface texturing will be tested. Reflectance spectrum and implied current density will be measured, seeking for benchmark values, such as <5% and 41.5 mA/cm2, respectively.

Report on the rear design of high efficiency IBC-SHJ solar cells

Report on the rear design of high efficiency IBC-SHJ solar cells, including novel contact stacks, their patterning on both structured and flattened back side, reflector structures and other innovative approaches used in the NextBase will be simulated in 1D – 3D simulations in AFORS-HET, ASA, Quokka and Sentau-rus tools.

Report on the energy yield of IBC-SHJ-based PV modules in both mono-and bi-facial configurations

Report on the yearly energy yield estima-tion of IBC-SHJ-based full-size PV modules in both mono-and bi-facial configurations incorporating optical model from T8.3 and module materials defined by WP7 as well as EU climate input.

Report on a pathway to reach the efficiencies defined in the project goals, and beyond

The NextBase targets world-record efficiencies > 26% at cell level and > 22% at module level. This report will summarize lessons learned during the above described WP8 studies as guidance for the final period of the project effort.

Project identity: website, templates, flyer with general project information for dissemination. Database for Dissemination

Report presenting the results on D2.1. This document is related to task T2.1.

Newsletter for project new developments and results after each year

Report presenting the results on D2.6. This document is related to task T2.2.

IBC-SHJ cells processing with a throughput >10 wafers/hour

Production of IBC SHJ precursors and cells.

IBC-SHJ device with efficiency ≥ 26.0% on 6-in wafer

This milestone aims at processing an IBC-SHJ device on a 6-in wafer, with an efficiency ≥ 26.0%, using the best processes and materials developed in WP4 and WP5. The achievement of this milestone will be certified by sending one or more devices to a certification laboratory for a calibrated I-V measurement (e.g. Fraunhofer ISE CalLab).

IBC devices with TMO based contact stacks with Voc>740 mV and FF>82%

In this deliverable we aim at the demonstration of high-efficiency solar cells, employing novel TMO based contact stacks, which are developed in task T4.2. The fabricated devices will be characterized by 1-sun I-V measurements. The success or failure of this deliverable will be determined by the measured electrical parameters.

IBC devices employing a-Si:H and c-Si:H based contact stacks with Voc>740 mV and FF>82%

The aim of this deliverable is the achievement of high-efficiency solar cell devices employing novel a-Si:H and uc-Si:H based contact stacks, which are developed in task T4.1. The devices will be characterized by 1-sun I-V measurements and the success, or failure, of this deliverable will be determined by the measured electrical parameters.

Publications

Interdigitated back contact silicon heterojunction solar cells featuring an interband tunnel junction enabling simplified processing

Author(s): B. Paviet-Salomon, A. Tomasi, D. Lachenal, N. Badel, G. Christmann, L. Barraud, A. Descœudres, J. Geissbühler, A. Faes, Q. Jeangros, J.P. Seif, S. Nicolay, B. Strahm, S. De Wolf, C. Ballif, M. Despeisse
Published in: Solar Energy, 2018, ISSN 0038-092X
Publisher: Pergamon Press Ltd.
DOI: 10.1016/j.solener.2018.01.066

Sputtered Tungsten Oxide as Hole Contact for Silicon Heterojunction Solar Cells

Author(s): Mathias Mews, Antoine Lemaire, Lars Korte
Published in: IEEE Journal of Photovoltaics, Issue 7/5, 2017, Page(s) 1209-1215, ISSN 2156-3381
Publisher: IEEE Electron Devices Society
DOI: 10.1109/JPHOTOV.2017.2714193

Aluminium metallisation for interdigitated back-contact silicon heterojunction solar cells

Author(s): Johann-Christoph Stang, Jan Haschke, Mathias Mews, Agnes Merkle, Robby Peibst, Bernd Rech, Lars Korte
Published in: Japanese Journal of Applied Physics, Issue 56/8S2, 2017, Page(s) 08MB22, ISSN 1347-4065
Publisher: The Japan Society of Applied Physics
DOI: 10.7567/JJAP.56.08MB22

Ultra-thin nanocrystalline n-type silicon oxide front contact layers for rear-emitter silicon heterojunction solar cells

Author(s): L. Mazzarella, A.B. Morales-Vilches, L. Korte, R. Schlatmann, B. Stannowski
Published in: Solar Energy Materials and Solar Cells, Issue 179, 2018, Page(s) 386-391, ISSN 0927-0248
Publisher: Elsevier BV
DOI: 10.1016/j.solmat.2018.01.034

Electronic structure of indium-tungsten-oxide alloys and their energy band alignment at the heterojunction to crystalline silicon

Author(s): Dorothee Menzel, Mathias Mews, Bernd Rech, Lars Korte
Published in: Applied Physics Letters, Issue 112/1, 2018, Page(s) 011602, ISSN 0003-6951
Publisher: American Institute of Physics
DOI: 10.1063/1.5010278

Optimized Metallization for Interdigitated Back Contact Silicon Heterojunction Solar Cells

Author(s): Johann-Christoph Stang, Thijs Franssen, Jan Haschke, Mathias Mews, Agnes Merkle, Robby Peibst, Bernd Rech, Lars Korte
Published in: Solar RRL, Issue 1/3-4, 2017, Page(s) 1700021, ISSN 2367-198X
Publisher: WILEY-VCH Verlag GmbH & Co. KGaA
DOI: 10.1002/solr.201700021

ITO-free metallization for interdigitated back contact silicon heterojunction solar cells

Author(s): Johann-Christoph Stang, Max-Sebastian Hendrichs, Agnes Merkle, Robby Peibst, Bernd Stannowski, Lars Korte, Bernd Rech
Published in: Energy Procedia, Issue 124, 2017, Page(s) 379-383, ISSN 1876-6102
Publisher: Elsevier
DOI: 10.1016/j.egypro.2017.09.253

Damage-free Ablation Process for Back-contacted Silicon Heterojunction Solar Cells

Author(s): Singh, A; Turan, B.; Haas, S.; Lambertz, A.; Ding, K.; Rau, U.
Published in: Journal of Laser Micro/Nanoengineering, 2018, ISSN 1880-0688
Publisher: Japan Laser Processing
DOI: 10.2961/jlmn.2018.03.0029

Poly-crystalline silicon-oxide films as carrier-selective passivating contacts for c-Si solar cells

Author(s): Guangtao Yang, Peiqing Guo, Paul Procel, Arthur Weeber, Olindo Isabella, Miro Zeman
Published in: Applied Physics Letters, Issue 112/19, 2018, Page(s) 193904, ISSN 0003-6951
Publisher: American Institute of Physics
DOI: 10.1063/1.5027547

Effective Passivation of Black Silicon Surfaces by Atomic Layer Deposition

Author(s): Päivikki Repo, Antti Haarahiltunen, Lauri Sainiemi, Marko Yli-Koski, Heli Talvitie, Martin C. Schubert, Hele Savin
Published in: IEEE Journal of Photovoltaics, Issue 3/1, 2013, Page(s) 90-94, ISSN 2156-3381
Publisher: IEEE Electron Devices Society
DOI: 10.1109/jphotov.2012.2210031

Numerical Simulations of IBC Solar Cells Based on Poly-Si Carrier-Selective Passivating Contacts

Author(s): Paul Procel, Guangtao Yang, Olindo Isabella, Miro Zeman
Published in: IEEE Journal of Photovoltaics, Issue 9/2, 2019, Page(s) 374-384, ISSN 2156-3381
Publisher: IEEE Electron Devices Society
DOI: 10.1109/jphotov.2019.2892527

Phosphorous Catalytic‐Doping of Silicon Alloys for the Use in Silicon Heterojunction Solar Cells

Author(s): Yong Liu, Manuel Pomaska, Weiyuan Duan, Do Yun Kim, Malte Köhler, Uwe Breuer, Kaining Ding
Published in: Advanced Engineering Materials, 2019, Page(s) 1900613, ISSN 1438-1656
Publisher: John Wiley & Sons Ltd.
DOI: 10.1002/adem.201900613

Dry etch damage in n-type crystalline silicon wafers assessed by deep-level transient spectroscopy and minority carrier lifetime

Author(s): Eddy Simoen, Hariharsudan Sivaramakrishnan Radhakrishnan, Md. Gius Uddin, Ivan Gordon, Jef Poortmans, Chong Wang, Wei Li
Published in: Journal of Vacuum Science & Technology B, Issue 36/4, 2018, Page(s) 041201, ISSN 2166-2754
Publisher: AVS Science and Technology Society
DOI: 10.1116/1.5026529

A novel silicon heterojunction IBC process flow using partial etching of doped a‐Si:H to switch from hole contact to electron contact in situ with efficiencies close to 23%

Author(s): Hariharsudan Sivaramakrishnan Radhakrishnan, M.D. Gius Uddin, Menglei Xu, Jinyoun Cho, Moustafa Ghannam, Ivan Gordon, Jozef Szlufcik, Jef Poortmans
Published in: Progress in Photovoltaics: Research and Applications, Issue 27/11, 2018, Page(s) 959-970, ISSN 1062-7995
Publisher: John Wiley & Sons Inc.
DOI: 10.1002/pip.3101

Low-Temperature $p$-Type Microcrystalline Silicon as Carrier Selective Contact for Silicon Heterojunction Solar Cells

Author(s): Angela N. Fioretti, Mathieu Boccard, Raphael Monnard, Christophe Ballif
Published in: IEEE Journal of Photovoltaics, Issue 9/5, 2019, Page(s) 1158-1165, ISSN 2156-3381
Publisher: IEEE Electron Devices Society
DOI: 10.1109/jphotov.2019.2917550

Low-temperature processes for passivation and metallization of high-efficiency crystalline silicon solar cells

Author(s): A. Descoeudres, C. Allebé, N. Badel, L. Barraud, J. Champliaud, G. Christmann, F. Debrot, A. Faes, J. Geissbühler, J. Horzel, A. Lachowicz, J. Levrat, S. Martin de Nicolas, S. Nicolay, B. Paviet-Salomon, L.-L. Senaud, C. Ballif, M. Despeisse
Published in: Solar Energy, Issue 175, 2018, Page(s) 54-59, ISSN 0038-092X
Publisher: Pergamon Press Ltd.
DOI: 10.1016/j.solener.2018.01.074

Simple emitter patterning of silicon heterojunction interdigitated back-contact solar cells using damage-free laser ablation

Author(s): Menglei Xu, Twan Bearda, Miha Filipič, Hariharsudan Sivaramakrishnan Radhakrishnan, Ivan Gordon, Jozef Szlufcik, Jef Poortmans
Published in: Solar Energy Materials and Solar Cells, Issue 186, 2018, Page(s) 78-83, ISSN 0927-0248
Publisher: Elsevier BV
DOI: 10.1016/j.solmat.2018.06.027

Profilometry of thin films on rough substrates by Raman spectroscopy

Author(s): Martin Ledinský, Bertrand Paviet-Salomon, Aliaksei Vetushka, Jonas Geissbühler, Andrea Tomasi, Matthieu Despeisse, Stefaan De Wolf , Christophe Ballif , Antonín Fejfar
Published in: Scientific Reports, Issue 6/1, 2016, ISSN 2045-2322
Publisher: Nature Publishing Group
DOI: 10.1038/srep37859

High-efficiency black IBC c-Si solar cells with poly-Si as carrier-selective passivating contacts

Author(s): Guangtao Yang, Peiqing Guo, Paul Procel, Gianluca Limodio, Arthur Weeber, Olindo Isabella, Miro Zeman
Published in: Solar Energy Materials and Solar Cells, Issue 186, 2018, Page(s) 9-13, ISSN 0927-0248
Publisher: Elsevier BV
DOI: 10.1016/j.solmat.2018.06.019

Laser Assisted Patterning of a-Si:H: Detailed Investigation of Laser Damage

Author(s): Menglei Xu, Twan Bearda, Hariharsudan S. Radhakrishnan, Miha Filipič, Ivan Gordon, Maarten Debucquoy, Jozef Szlufcik, Jef Poortmans
Published in: physica status solidi (RRL) - Rapid Research Letters, Issue 11/9, 2017, Page(s) 1700125, ISSN 1862-6254
Publisher: Wiley - VCH Verlag GmbH & CO. KGaA
DOI: 10.1002/pssr.201700125

Optimization of tunnel-junction IBC solar cells based on a series resistance model

Author(s): D. Lachenal, P. Papet, B. Legradic, R. Kramer, T. Kössler, L. Andreetta, N. Holm, W. Frammelsberger, D.L. Baetzner, B. Strahm, L.L. Senaud, J.W. Schüttauf, A. Descoeudres, G. Christmann, S. Nicolay, M. Despeisse, B. Paviet-Salomon, C. Ballif
Published in: Solar Energy Materials and Solar Cells, Issue 200, 2019, Page(s) 110036, ISSN 0927-0248
Publisher: Elsevier BV
DOI: 10.1016/j.solmat.2019.110036

Aluminum-Doped Zinc Oxide as Front Electrode for Rear Emitter Silicon Heterojunction Solar Cells with High Efficiency

Author(s): Daniel Meza, Alexandros Cruz, Anna Morales-Vilches, Lars Korte, Bernd Stannowski
Published in: Applied Sciences, Issue 9/5, 2019, Page(s) 862, ISSN 2076-3417
Publisher: MDPI
DOI: 10.3390/app9050862

Aluminium-Doped Zinc Oxide Rear Reflectors for High-Efficiency Silicon Heterojunction Solar Cells

Author(s): Laurie-Lou Senaud, Gabriel Christmann, Antoine Descoeudres, Jonas Geissbuhler, Loris Barraud, Nicolas Badel, Christophe Allebe, Sylvain Nicolay, Matthieu Despeisse, Bertrand Paviet-Salomon, Christophe Ballif
Published in: IEEE Journal of Photovoltaics, Issue 9/5, 2019, Page(s) 1217-1224, ISSN 2156-3381
Publisher: IEEE Electron Devices Society
DOI: 10.1109/jphotov.2019.2926860

Theoretical evaluation of contact stack for high efficiency IBC-SHJ solar cells

Author(s): Paul Procel, Guangtao Yang, Olindo Isabella, Miro Zeman
Published in: Solar Energy Materials and Solar Cells, Issue 186, 2018, Page(s) 66-77, ISSN 0927-0248
Publisher: Elsevier BV
DOI: 10.1016/j.solmat.2018.06.021

Exploring co-sputtering of ZnO:Al and SiO2 for efficient electron-selective contacts on silicon solar cells

Author(s): Sihua Zhong, Monica Morales-Masis, Mathias Mews, Lars Korte, Quentin Jeangros, Weiliang Wu, Mathieu Boccard, Christophe Ballif
Published in: Solar Energy Materials and Solar Cells, Issue 194, 2019, Page(s) 67-73, ISSN 0927-0248
Publisher: Elsevier BV
DOI: 10.1016/j.solmat.2019.02.005

Silicon oxide treatment to promote crystallinity of p-type microcrystalline layers for silicon heterojunction solar cells

Author(s): Mathieu Boccard, Raphaël Monnard, Luca Antognini, Christophe Ballif
Published in: AIP Conference Proceedings volume 1999, 2018, Page(s) 040003
Publisher: Author(s)
DOI: 10.1063/1.5049266

Nitride layer screening as carrier-selective contacts for silicon heterojunction solar cells

Author(s): Angela N. Fioretti, Mathieu Boccard, Adele C. Tamboli, Andriy Zakutayev, Christophe Ballif
Published in: AIP Conference Proceedings volume 1999, 2018, Page(s) 040007
Publisher: Author(s)
DOI: 10.1063/1.5049270

22% efficient dopant-free interdigitated back contact silicon solar cells

Author(s): Weiliang Wu, Wenjie Lin, Sihua Zhong, Bertrand Paviet-Salomon, Matthieu Despeisse, Zongcun Liang, Mathieu Boccard, Hui Shen, Christophe Ballif
Published in: AIP Conference Proceedings volume 1999, 2018, Page(s) 040025
Publisher: Author(s)
DOI: 10.1063/1.5049288

From Wafers to Modules to Mass Production: Solving All Bottlenecks in Silicon Heterojunction Technology

Author(s): Ballif, Christofer; Bocard, Mathieu; Despeisse, Mathieu
Published in: EUPVSEC, Issue 1, 2019, Page(s) 1
Publisher: EUPVSEC

Direct contact plating - Inline plating solution for ZEBRA IBC by local contacting

Author(s): Katharina Gensowski, Gisela Cimiotti, Jonas Eckert, Varun Arya, Juan Garcia la Roche, Julien Scheffelmeier, Bastien Decker, Giuseppe Galbiati, Dominik Rudolph, Sven Kluska
Published in: INTERNATIONAL SYMPOSIUM ON GREEN AND SUSTAINABLE TECHNOLOGY (ISGST2019), 2019, Page(s) 020011
Publisher: AIP Publishing
DOI: 10.1063/1.5125876

Deliverables

Publications

Share this page

Download