Published in collaboration with NCMS
Digital Manufacturing Report

News & information about the fast-moving world
of digital manufacturing, modeling & simulation

Language Flags

A New World Record for Solar Cell Efficiency


To make solar electricity affordable on a large scale, scientists and engineers the world over have long been trying to develop a low-cost solar cell, which is both highly efficient and easy to manufacture with high throughput. Now a team at Empa's Laboratory for Thin Film and Photovoltaics, led by Ayodhya N. Tiwari, has made (yet another) leap ahead. They achieved a record 20.4% energy conversion efficiency for thin film CIGS solar cells on flexible polymer substrates, a massive improvement over the previous record of 18.7% achieved by the same team in May 2011. Tiwari's team has been investigating and developing various thin film solar cell technologies for some time. Over the years the laboratory has boosted the photovoltaic conversion efficiency of flexible CIGS solar cells time and again, from 12.8% in 1999 – the group's first world record – to 14.1% in 2005, 17.6% in 2010 and 18.7% in 2011.

Closing the efficiency gap to silicon wafer cells

The latest in the series of records has been achieved, thanks to innovative ideas and excellent team work in the lab, especially by PhD students Adrian Chirila and Fabian Pianezzi. The team has succeeded in modifying the properties of the CIGS layer, grown at low temperatures, which absorbs light and contributes to the photo-current in solar cells. The cell efficiency value was independently certified by the Fraunhofer Institute for Solar Energy Systems (ISE) in Freiburg, Germany. What's more, Empa's new record efficiency for flexible solar cells now even exceeds the record value of 20.3% for CIGS solar cells on glass substrates – and equals the highest efficiencies for polycrystalline silicon wafer-based solar cells. "We have now – finally – managed to close the "efficiency gap" to solar cells based on polycrystalline silicon wafers or CIGS thin film cells on glass", says Tiwari.

Thin film, lightweight and flexible high-performance solar modules are attractive for numerous applications such as solar farms, roofs and facades of buildings, automobiles and portable electronics and can be produced using continuous roll-to-roll manufacturing processes that offer further cost reductions compared to standard silicon technologies. In other words, they have the potential to enable low-cost solar electricity in the near future. "The series of record efficiencies for flexible CIGS solar cells developed at Empa demonstrates that thin film solar cells can match the excellent performance of polycrystalline silicon cells. Now it is time for the next step, the scale-up of the technology to cover large areas in a cost-efficient roll-to-roll manufacturing process with an industrial partner", says Gian-Luca Bona the Director of Empa. For this purpose, Empa is collaborating with Flisom, a start-up company involved in industrialization of flexible CIGS solar cells.

The research work has been supported over the years by the Swiss National Science Foundation (SNSF), the Commission for Technology and Innovation (CTI), the Swiss Federal Office of Energy (SFOE) and the EU Framework Programmes.

-----

Source: Empa

RSS Feeds

Subscribe to All Content


Feature Articles

Titan Puts a New Spin on GE’s Wind Turbine Research

Unlike traditional energy sources, wind is a trouble to tame, which has led GE to turn to advanced simulations at Oak Ridge National Laboratory to put the technology on track to cover 12 percent of the world's energy production.
Read more...

Lighting a Fire Under Combustion Simulation

Combustion simulation might seem like the ultimate in esoteric technologies, but auto companies, aircraft firms and fuel designers need increasingly sophisticated software to serve the needs of 21st century engine designs. HPCwire recently got the opportunity to take a look at Reaction Design, one of the premier makers of combustion simulation software, and talk with its CEO, Bernie Rosenthal.
Read more...

D-Wave Sells First Quantum Computer

On Wednesday, D-Wave Systems made history by announcing the sale of the world's first commercial quantum computer. The buyer was Lockheed Martin Corporation, who will use the machine to help solve some of their "most challenging computation problems." D-Wave co-founder and CTO Geordie Rose talks about the new system and the underlying technology.
Read more...

Short Takes

Local Motors and ORNL Partner for Automotive Manufacturing

Jan 24, 2014 | Local Motors, a vehicle innovator, and the U.S. Department of Energy’s Oak Ridge National Laboratory (ORNL) have announced a new partnership that they hope will bring change to the automotive industry.
Read more...

Robots Showcase Skills at DRC

Jan 22, 2014 | A month ago, the DARPA Robotics Challenge Trials (DRC) commenced. The main goal of the event was to aid in the development of robots that will someday respond to natural or even man-made disasters. At this year’s DRC, prototype robots from 16 teams were put through a series of trials in which they were to showcase their skills.
Read more...

Advanced Modeling Benefits Wind Farms

May 25, 2011 | Advanced computing resources optimize the site selection of wind farms.
Read more...

Not Your Parents' CFD

Oct 13, 2010 | Outdated beliefs stand in the way of greater CFD adoption.
Read more...

Manufacturers Turn to HPC to Cut Testing Costs

Oct 06, 2010 | Supercomputing saves money by reducing the need for physical testing.
Read more...

Sponsored Whitepapers

Technical Computing for a New Era

07/30/2013 | IBM | This white paper examines various means of adapting technical computing tools to accelerate product and services innovation across a range of commercial industries such as manufacturing, financial services, energy, healthcare, entertainment and retail. No longer is technically advanced computing limited to the confines of big government labs and academic centers. Today it is available to a wide range of organizations seeking a competitive edge.

The UberCloud HPC Experiment: Compendium of Case Studies

06/25/2013 | Intel | The UberCloud HPC Experiment has achieved the volunteer participation of 500 organizations and individuals from 48 countries with the aim of exploring the end-to-end process employed by digital manufacturing engineers to access and use remote computing resources in HPC centers and in the cloud. This Compendium of 25 case studies is an invaluable resource for engineers, managers and executives who believe in the strategic importance of applying advanced technologies to help drive their organization’s productivity to perceptible new levels.

Conferences and Events

Featured Events



Copyright © 2011-2014 Tabor Communications, Inc. All Rights Reserved.
Digital Manufacturing Report is a registered trademark of Tabor Communications, Inc. Use of this site is governed by our Terms of Use and Privacy Policy.
Reproduction in whole or in part in any form or medium without express written permission of Tabor Communications Inc. is prohibited.
Powered by Xtenit.