Requires Subscription: Photovoltaics International Archive

i-PERC technology enables Si solar cell efficiencies beyond 20%

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

By Filip Duerinckx, Principal Engineer, IMEC; Emanuele Cornagliotti, Research Scientis, IMEC; Angel Uruena, Research Engineer, IMEC; Victor Prajapati, Silicon PV Researcher, IMEC; Patrick Choulat, R&D Engineer, IMEC; Philip Pieters, Director of Business Development for Energy, IMEC; Jef Poortmans, Director of the Solar and Organic Technologies Department, IMEC

A cost-effective and industrial version of the well-known passivated-emitter
and rear cell (PERC) concept has been developed by imec. The imec i-PERC technology comprises a large-area p-type monocrystalline Si solar cell with, on its front, a homogeneous emitter, a thin thermal oxide layer and fine-line Ag screen-printed contacts; on its rear, the cell has a chemically polished surface, low-cost rear dielectric stack layers and local Al contacts. Yielding certified efficiencies of up to 20% and fill factors of 80%, these cells clearly outperform aluminium back-surface field (Al-BSF) cells. During the development stages, process complexity and additional tool investment were kept to a minimum. It is
therefore believed that this technology can be picked up by companies in a straightforward way as the next-generation industrial solar cell technology.

L3dwLWNvbnRlbnQvdXBsb2Fkcy9sZWdhY3ktcHVibGljYXRpb24tcGRmcy9kNWIyNjc1ZjdlLWlwZXJjLXRlY2hub2xvZ3ktZW5hYmxlcy1zaS1zb2xhci1jZWxsLWVmZmljaWVuY2llcy1iZXlvbmQtMjAucGRm

Published In

Photovoltaics International Archive
For manufacturers who had their heads in the bunker during 2012, fighting falling ASPs and eroding margins, the nineteenth edition brings you details of what lies in store for this coming year. Wright Williams & Kelly return in this issue with their popular analysis of payback on technology buys; crucially they analyze n-type wafers, Al2O3 passivation and copper metallization. SERIS shows us how to achieve 18.7% efficiencies using low-cost etching techniques on diffused wafers. We also have two important technology roundups: CIGS from Helmholtz Berlin, and PV module encapsulation techniques from Fraunhofer ISE.

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

Solar Media Events
June 7, 2022
Leonardo Royal London City, London, UK
Solar Media Events
June 14, 2022
Napa, USA
Solar Media Events
June 22, 2022
Sheraton Austin Hotel at the Capitol, Austin, Texas