Requires Subscription: Photovoltaics International Archive

Towards industrial manufacturing of TOPCon

Share on facebook
Facebook
Share on twitter
Twitter
Share on linkedin
LinkedIn
Share on reddit
Reddit
Share on email
Email

By Frank Feldmann; Sebastian Mack; Bernd Steinhauser; Leonard Tutsch; Jana-Isabelle Polzin; Jan Temmler; Anamaria Moldovan; Andreas Wolf; Jochen Rentsch; Martin Hermle; Stefan W. Glunz, Fraunhofer Institute for Solar Energy Systems ISE, Freiburg, Germany

TOPCon is regarded as a possible follow-up technology to the passivated emitter and rear cell (PERC) concept. This paper presents the latest results for high-efficiency solar cells, and the progress made on migrating layer deposition to high-throughput tools, which are already in use in industry. Possible metallization approaches, and three different industrially relevant solar cell structures featuring TOPCon, are also discussed.

L3dwLWNvbnRlbnQvdXBsb2Fkcy9sZWdhY3ktcHVibGljYXRpb24tcGRmcy84N2YwOGFlMmQ2LXRvd2FyZHMtaW5kdXN0cmlhbC1tYW51ZmFjdHVyaW5nLW9mLXRvcGNvbi5wZGY=

Published In

Photovoltaics International Archive
Welcome to the tenth anniversary edition of Photovoltaics International. Over the past decade this journal has documented the latest developments in the fast-changing of world PV technology, bringing you exclusive insights from researchers working at the industry’s cutting edge. Over that time the pace of change has been astonishing, so much so that it scarcely seems as though one new technology is accepted before the next arrives on the scene. So seems to be the case with the passivated emitter and rear cell (PERC), which having become the technology upgrade of choice across the industry now appears to have a successor in waiting. In this edition researchers at Fraunhofer ISE look at so-called tunnel oxide passivated contact (TOPCon) technology as a follow-up to PERC. Meanwhile, a team from TÜV Rheinland takes a deep dive into the vexed question of how the industry can most usefully define the benefits of bifacial technology. At the other end of the value chain, US-based 1366 Technologies gives an account of its contribution to reducing costs in wafer manufacturing, a significant ongoing expense in industrial PV cell production and thus a key focus for efforts to drive down the levelized cost of solar-generated electricity. Elsewhere in this edition, Canadian Solar outlines some of the solutions it has developed for tackling light-induced degradation in multi-PERC cells and modules, a persistent challenge with PERC technology. In this edition our deputy editor Tom Kenning reports from the recent PV CellTech event in Malaysia, where the ‘Who’s Who’ of the PV manufacturing world gathered to debate the current state of play in solar technology.

Read Next

Photovoltaics International Archive
Photovoltaics International Papers, PV Modules
With mature product offerings now available from several of the leading industrial PV equipment and tool manufacturers, and latest-generation ECAs available from suppliers, this article aims to provide important background information on ECAs, as well as give a brief overview of some of the challenges and cutting-edge developments in ECA-related PV applications.
Photovoltaics International Archive
Cell Processing, Photovoltaics International Papers
This paper reviews those associated fabrication technologies for the mass production of Ni/Cu-plated contacts. The technologies currently in use in the PV industry for plated contacts, as well as the developing technologies having high scaling-up potential, will be reviewed. In addition, the future requirements for plating metallization will be discussed.
Photovoltaics International Archive
Cell Processing, Photovoltaics International Papers
This paper discusses what is actually behind these announcements and how an evolutionary industry sector such as PVis becoming, it seems, decidedly revolutionary with large jumps in efficiency.
Photovoltaics International Archive
Cell Processing, Photovoltaics International Papers
This paper presents an analysis and the results of extensive simulations of the efficiency limits and roadmap to 25.5% of a tunnel oxide passivated contact (TOPCon) solar cell, on the basis of an efficiency level of 25.21% (designed area, identified by ISFH) achieved through three years of continuous technical optimization on a pilot line at Longi.
Photovoltaics International Archive
Cell Processing, Photovoltaics International Papers
The development of new ways of increasing the production throughput for passivated emitter and rear cells (PERCs), as the major solar cell technology in the global market, is an area of great interest to the PV community. This paper presents approaches for significantly increasing the throughput of PERC production processes. The main focus is on the tube furnace processes for the emitter formation and oxidation, with the introduction of the High Temperature Stack Oxidation (HiTSOx) approach. Additional approaches that are currently under investigation at Fraunhofer ISE for increasing the throughput for wet-chemical, printing and laser processes will also be briefly outlined.
Photovoltaics International Archive
Cell Processing, Photovoltaics International Papers
The holy grail of every solar cell producer is the creation of a lowcost interdigitated back-contact (IBC) solar cell with an efficiency greater than 25%, a goal that can be found in almost every roadmap presentation. In this paper it will be shown that we are not far away from achieving this target, since IBC devices, with different process complexities, are already in production at several companies.

Subscribe to Newsletter

Upcoming Events

Upcoming Webinars
January 26, 2022
Free Webinar
Solar Media Events
February 23, 2022
London, UK
Solar Media Events
March 8, 2022
London, UK
Solar Media Events
March 23, 2022
Austin, Texas, USA
Solar Media Events
March 29, 2022
Lisbon, Portugal