Back contact HIT solar cell from Panasonic pushes efficiency record to 25.6%

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

Panasonic Corporation has achieved a record conversion efficiency of 25.6% on a commercial sized (143.7 cm²) monocrystalline-based ‘HIT’ solar cell.

A key breakthrough in the efficiency record was employing back contact electrodes for the first time with its heterojunction technology. The previous record set by the company in February 2013 used a 101.8 cm² cell to produce a conversion efficiency of 24.7%.

However, Panasonic said that reduction improvements in recombination loss, optical loss and resistance loss were contributors to the efficiency record. The reduction in resistance loss was a key aspect of migrating to a back contact cell, while improvements in short circuit current density (Jsc) to 41.8mA/cm² compared to its previous 39.5mA/cm² were contributing factors from the back contact cell.

Panasonic said that in its previous HIT cell configuration top surface electrodes had been optimised by thinner grid electrodes but placing the electrodes on the reverse side of the cell reduced the resistive loss when the current was transferred to the grid electrodes. The company also reported a high fill factor (FF) of 0.827, by improving resistance loss in the amorphous thin-film silicon layer.

Deposition improvements to the top surface amorphous had also led to a high temperature coefficient of -0.25% per degree Celsius, which resulted in high conversion efficiency stability under high open circuit voltage (Voc) and at high temperatures.

Panasonic said that it was considering future volume production of the back contact cell without giving any timelines.
 

26 May 2021
Tara Doyle and Tristan Erion-Lorico of PV Evolution Labs (PVEL), will share this year’s top-performing modules and discuss key findings from PVEL’s PQP testing. Join us to explore which find out which new Top Performer category can affect project value by more than $100,000 – and which test resulted in >20% degradation.
3 June 2021
Knowing which module suppliers are in control of in-house production is a key issue when looking at quality control and field reliability. During the webinar, creator of the PV ModuleTech Bankability Ratings analysis - Finlay Colville - will report on the latest rankings analysis of global PV module suppliers, focusing on which companies are making their own wafers and cells, and which are dependent on third-party outsourcing. Also, during this webinar, Frédéric Dross - Vice President, Strategic Development at STS - will explain the processes and documentation that manufacturers and importers should be adopting, to be able to demonstrate the provenance of their products, as well as covering general principles that stakeholders should be implementing in order to provide transparency on their supply chain. STS recently co-authored the Solar Supply Chain Traceability Protocol, which was published in April 2021.
15 June 2021
Looking at the drivers and dynamics of utility scale solar in the UK over the next five years. This event will consider the immediate challenges as we enter the build phase in the UK market where we could see as much as 3GW deployed in 2021 alone! What developments will continue the growth of 100MW+ sites and what impact will government policy have on the rate of deployment in the UK? Join leading developers and manufacturers shaping the direction of one of Europe’s most active markets and hear from speakers with a history of influencing innovation and change.
6 July 2021
Explore in depth the opportunities of the different countries via case studies, business and financial models that will foster growth in the region with particular focus on Thailand, Philippines, Indonesia, Taiwan, Korea, Cambodia, Singapore, Malaysia & Vietnam.
13 July 2021
Energy Next is a new industry exhibition focusing on the latest renewable energy and energy efficiency technology, which will be held for the first time in 2021 in Sydney, Australia alongside the Clean Energy Council’s Australian Clean Energy Summit, the peak gathering of leaders driving Australia's energy transformation. Organised by the same people behind Australia’s largest clean energy event, All-Energy Australia, Energy Next will give visitors two days of access to key suppliers in the industry, free-to-attend professional development and industry workshops, and networking opportunities to better understand clean energy issues and solutions and learn about the latest developments in this transformational, dynamic sector.
24 August 2021
Join us to hear directly from the CTOs and heads-of-research from the top-20 cell/wafer producers to the PV industry today. You'll find out which companies are investing and what technologies and cell architectures are being primed for multi-GW production and gather key market intel around wafer supplier trends for cell manufacturing, including which format/wafer-size is likely to dominate 3-5 years out.

Read Next

May 18, 2021
US-based renewable energy software provider Power Factors has announced its second European acquisition in as many months, securing a deal to acquire German peer 3megawatt.
May 18, 2021
The US has retained its title as the top market for clean energy investments in audit firm EY’s biannual Renewable Energy Country Attractiveness Index (RECAI), but India, the UK and France are catching up.
May 18, 2021
Major polysilicon provider Daqo New Energy has reported a rise in revenues as average selling prices (ASPs) inched upward in the opening quarter, however the firm’s ASPs could effectively double in Q2.
May 18, 2021
Solar Module Super League (SMSL) member JinkoSolar has named Mengmeng (Pan) Li as the company’s new chief financial officer, replacing Haiyun Cao effective immediately.
May 18, 2021
Indian authorities have launched an anti-dumping investigation into imports of solar cells from China, Thailand and Vietnam following an application filed by the Indian Solar Manufacturers Association.
May 18, 2021
Indian independent power producer (IPP) ReNew Power has selected a site in the state of Gujarat for a new solar cell and module manufacturing facility that will have an annual capacity of 2GW.

Subscribe to Newsletter

Upcoming Events

Upcoming Webinars
May 26, 2021
Session 1 - 7:00 AM (BST) | Session 2 - 5:00 PM (BST)
Solar Media Events
June 15, 2021
Solar Media Events
July 6, 2021
Solar Media Events
August 24, 2021