New Product: Targray’s ‘Peak Sun’ dopants contribute to higher cell conversion efficiencies


Product Briefing Outline: Targray Technology now offers the Peak Sun POCl3, which is claimed to be the highest purity N-type dopant available to the solar cell manufacturing industry.  Phosphorus Oxychloride (POCl3) is liquid phosphorus used as an N-type dopant in the diffusion process for silicon wafers. Peak Sun’s high purity 99.99999%, 7N, reduces variability in bin distribution, increases minority carrier lifetimes which contribute to higher conversion efficiencies (CE) and provides consistency in the diffusion process. All of which contribute towards a lower manufacturing cost per watt.

Problem: Impurities such as titanium, molybdenum, and vanadium are known to reduce minority carrier lifetimes thus affecting the efficiency of the cell.  Research indicates that these lifetime killers have some of the greatest detrimental effect on the actual performance of the solar cells. Impurities trap electrons and reduce minority carrier lifetime in cells.

Solution: Peak Sun’s POCl3 distillation process was designed to reduce levels of trace elements and other impurities in metals such as titanium, molybdenum, and vanadium that are known to cause problems in the solar cell manufacturing process and have the most detrimental effect on carrier lifetime.  Higher purity means longer minority carrier lifetimes. Break seal technology guarantees the integrity of the chemical by keeping impurities out during transport and storage. The only chemical manufactured in a world class facility assuring no cross contamination. It is tested for purity in a Class-100 clean room.

Applications: Phosphorus Oxychloride (POCl3) is liquid phosphorus used as an N-type dopant in tube diffusion processes for silicon wafers. It is used to form the N-Type emitter of P-N junction and to getter impurities in 6N mono and multicrystalline solar cells.

Platform: Peak Sun POCl3 is available in industry standard 1.5L quartz bubblers fitted with “breakseals” to ensure product integrity. These bubblers are compatible with all current makes of temperature controllers and tube diffusion furnaces. Containers for bulk distribution systems are also available.

Availability: Currently available exclusively through Targray Technology for the North American, European, Indian and Australian PV markets.

23 August 2022
Intersolar South America, South America’s largest exhibition and conference for the solar industry, takes place at the Expo Center Norte in São Paulo, Brazil, on August 23–25, 2022, and has a focus on the areas of photovoltaics, PV production and solar thermal technologies. At the accompanying Intersolar South America Conference, renowned experts shed light on hot topics in the solar industry. In 2021 – despite the Covid-19 pandemic – Intersolar South America welcomed more than 28,000 visitors and over 1,000 conference attendees over 3 days. 200+ providers showcased their products. Combining local and international expertise, Intersolar South America brings together the PV and solar thermal sector to discuss the current status and strategic trends for Latin American PV markets, as well as technology innovations and new business opportunities. Overall, distributed generation is still driving momentum in the Brazilian market. Get 10% off with code 38LCF6KN
6 September 2022
Intersolar Mexico sits at the cross-section of photovoltaics, solar heating & cooling technologies, and energy storage. The event serves as the industry’s go-to source for invaluable technology trends and premier B2B contacts in the promising Mexican solar market. From September 6–8, 2022 Intersolar Mexico together with the co-located The GREEN Expo® and Aquatech Mexico will take place in Centro Citibanamex, Mexico City.
7 September 2022
The demand for rooftop solar PV is soaring, driven by falling costs of the technology against energy crises that are gripping countries globally. But while an increasing number of households turn to solar to generate their own electricity, there is now a need for more specialist equipment, technologies and services to ensure the solar transition can reach as many customers as possible. Delivering these is now a major challenge for rooftop solar installers. This webinar will analyse the characteristics of the rooftop solar market, discussing how the products, logistics, installation and servicing of solar systems has evolved in line with consumer demands.
14 September 2022
Join us in London for 2 days as we look at the UK’s new landscape for utility & rooftop solar. Understand the new opportunities within this GW-plus annual market!
15 September 2022
Bifacial PV modules will be the dominant solar PV technology globally within one or two years; in the utility-scale sector, their market share is already above 70%. This webinar will provide a clear view on the successful implementation of bifacial technology, maximizing system performance and minimising LCoE.
19 September 2022
RE+ 2022 is the umbrella event that includes SPI, ESI, RE+ Power, and RE+ Infrastructure. As North America's largest renewable energy event, it's a catalyst for industry innovation that's supercharging business growth in the clean energy economy.

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