Product Review: Sentech provides quality control for PERC back side processing in production

Share on facebook
Facebook
Share on twitter
Twitter
Share on linkedin
LinkedIn
Share on reddit
Reddit
Share on email
Email
SENTECH Instruments has designed the SENperc PV for the measurement of Al2O3/SiNx layer stacks and single films for the passivation of PERC (Passivated Emitter Rear Cell) solar cells. Image: Sentech Instruments.

SENTECH Instruments has designed the SENperc PV for the measurement of Al2O3/SiNx layer stacks and single films for the passivation of PERC (Passivated Emitter Rear Cell) solar cells. The stability of the deposition process is monitored over the long-term thereby the maintenance intervals of the deposition tools can be optimized.

Problem

Due to the backside of PERC cells are poorly reflective, standard ellipsometry techniques cannot be applied to characterize the Al2O3/SiNx layers for deposition quality control by solar cell manufacturers. The special measurement set-up needs a highly sensitive detection unit with a special correction for the depolarization of light scattering effects, and an easy to operate hard- and software suited for QC in the production line. Additionally, manufacturers of solar cells need to prove the quality of cells to their customers. Therefore, an appropriate documentation of the manufacturing process is also needed.

Solution

To make the quality control for PERC cells easier and more efficient, the SENperc system comes with recipe based push-button operation and industrial user interface. The PERC solar cell is placed with the deposited backside on the sample table. The wafers ID is entered and the measurement begins. No sample alignment is required. Thickness and refractive index are measured and saved to the SQL database. Statistical process control (SPC) is applied to evaluate the deposition process of the PERC solar cells. Preset ranges are applied for yield analysis. Direct and long-term feedback is provided to the operator for immediate intervention. The SQL database is permanently accessible locally as well as via LAN to support cell tracking and yield analysis.

Applications

Measuring thickness and refractive index of Al2O3 and SiNx films on backside of PERC solar cells.

Platform

The compact design of the SENperc PV combined with push-button operation and data access via LAN make the system an ideal solution for quality control of deposition processes of PERC cell manufacturing.

Availability

Currently available.

Read Next

January 17, 2022
Solar module manufacturer Seraphim has launched its new S5 series of high-efficiency PV modules with a maximum power output of up to 670W and an efficiency of 21.57%.
January 13, 2022
Reliance Industries has signed a Memorandum of Understanding (MoU) with the government of Gujarat for a total investment of INR5.955 lakh crore (US$80 billion) over 10-15 years to establish 100GW of renewables and set up green technology manufacturing facilities in the state.
January 10, 2022
Upstream solar major Tongwei has forecasted for profits to more-than-double in its 2021 financial year on the back of increased material and cell prices experienced last year.
January 10, 2022
The Australian Renewable Energy Agency (ARENA) is providing AU$40 million in funding to support research and development (R&D) that can help Australia reach its ‘ultra-low cost solar’ goal, recently added as a priority under the country’s decarbonisation strategy.
January 6, 2022
JinkoSolar has won a tender issued by the China Petroleum Engineering and Construction Corporation (CPECC), an affiliate company of the China National Petroleum Corporation (CNPC), for up to 1.85GW of high efficiency TOPCon modules
November 19, 2021
Canadian Solar has warned of solar cell overcapacity next year, slamming the breaks on its own cell manufacturing expansion plans while accelerating on its module assembly roadmap.

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