GT Advanced Technologies DSS 450 MonoCast technology offers 19% plus cell efficiencies

Share on facebook
Share on twitter
Share on linkedin
Share on reddit
Share on email

GT Advanced Technologies has announced the commercial availability of its DSS 450 MonoCast crystal growth system. Modules produced from material grown in the furnace are claimed to rival modules that incorporate traditional boron-doped batch CZ monocrystalline wafers in terms of total output. The DSS450 MonoCast furnace incorporates a number of new features that result in ≥80% mono volume yield per slabbed ingot and significantly increases Grade I wafers (>90% mono area/wafer) per ingot than other cast mono technologies.


Although boron-doped batch CZ monocrystalline wafers offer higher purity and provide higher cell efficiencies, compared to conventional multi-crystalline wafers, production costs are significantly higher. There is a need to provide multi-crystalline type wafer production costs without sacrificing purity and performance.


Modules produced from GT’s MonoCast material are claimed to rival modules that incorporate traditional boron-doped batch CZ processed monocrystalline wafers in terms of total output. Cells produced from DSS450 MonoCast wafers are claimed to have lower Light Induced Degradation (LID) and the full square surface dimension area across the wafer provides greater electricity generating surface area than the pseudo square shape of traditional monocrystalline wafers. A typical MonoCast ingot produces three grades of wafers: Grade 1 which is nearly all mono, Grade 2 a hybrid wafer with more mono than multi and Grade 3 wafers, which are more multi than mono. Based on the recent field trial results, GT’s MonoCast solution delivers greater than 80% mono volume yield per ingot, with over 95% of all wafers being Grade I and II. GTAT has also developed a post processing technique, which is claimed to significantly increase the number of Grade I wafers per ingot well beyond that possible with any other commercially available monocast technology. Ongoing work on material science and cell architectures with the Georgia Institute of Technology was said to have demonstrated, that MonoCast material when combined with advanced cell processing technology can deliver efficiency conversions of greater than 19%. The result is module efficiencies that are competitive with modules incorporating batch monocrystalline wafers. 
‘MonoCast’ or ‘quasi-mono’ wafer production.
The DSS450 MonoCast features new advanced hardware and an industry first automatic seed retention feature that eliminates dipping and operator intervention between melt and growth helping to automate the process and enabling the production worthiness of the DSS450 MonoCast system. When combined with GT’s new ‘Acuity’ performance software, the DSS450 MonoCast can produce high quality ingots run after run. 
The MonoCast technology is being offered first on GT’s DSS450 and DSS450HP systems. Customers currently operating these DSS furnaces can migrate to the new DSS450 MonoCast system through a field upgrade, which is expected to be at a cost below US$100,000 per system.


1 December 2021
Join over 500 attendees at this virtual conference on 1-2 December 2021 for expert presentations covering PV Module Technology, Supply & Site Optimisation for Utility-Scale. Delegates can access streamed presentations, session recordings and chat/messaging tools to connect with fellow delegates and speakers. Speakers include leading developers, manufacturers, testing and research institutes, including: NREL, Silicon Ranch, Sonnedix, Heliene, Powertis, LONGi Solar, JinkoSolar, PVEL, Risen Energy, Seraphim, STS, Trina Solar, Eternalsun Spire, QEERI, Fraunhofer, Estuary Capital Partners, VDE, First Solar, Longroad Energy, Powertis and DNV Energy Systems
2 December 2021
Intersolar is the world’s leading exhibition & conference series for the solar industry. As part of this event series, Intersolar India in Mumbai is India’s most pioneering exhibition and conference for India’s solar industry. It takes place annually and has a focus on the areas of photovoltaics, PV production and solar thermal technologies. Since 2019, Intersolar India is held under the umbrella of The smarter E India – India’s innovation hub for the new energy world.
9 December 2021
The Smart Energy Council is hosting Australia’s second Virtual Smart Energy Conference and Exhibition on Thursday, 9 December 2021. This event will show that the industry powers on despite COVID-19 and we are standing together undeterred in spirit. Bringing our global community together using the latest technology.
13 January 2022
Intersolar North America and Energy Storage North America “Come Together” for the first time in Long Beach, CA—connecting installers, developers, utilities, technology providers, policy makers, and key stakeholders from around the world to advance the clean energy future. With best-in-class conference programming, integrated exhibits and pavilions, and the live Solar Games installer competition, #isnaesna21 will showcase the industry trends, innovative solutions, and emerging talent transforming the solar, energy storage, and e-mobility markets. Register today to redeem our exclusive offer for PV Tech readers—free expo hall or 20% off full conference pass.
1 February 2022
As Solar Finance & Investment enters its ninth year, we sit on the cusp of a new power market with solar at its heart. The 2022 edition of the event will build on our years of expertise and relationships to bring investors and lenders together with top developers. Connect with leaders in the field and use exclusive insights to drive investment and development decisions for the future. Meet new and existing project partners at the largest gathering of European solar investors and lenders.
23 February 2022
Held annually since 2016, the Energy Storage Summit Europe is the place to be for senior stakeholders in the European storage industry. Designed to accelerate deployment of storage, we examine evolving chemistries, business models, project design, revenue stacks and use cases for storage. The 2022 edition will include exclusive content around longer duration solutions, energy strategies for wide-scale deployment of EVs and "EnTech", the event which sits at the intersection of digitisation, decentralisation and decarbonation of the power system. Come to meet TSOs, DSOs, Utilities, Developers, Investors and Lenders and leave with new contacts, partners and a wealth of information.

Read Next

PV Tech Premium
November 30, 2021
Array Technologies reveals to PV Tech Premium the core motivations behind its US$652m deal to acquire STI Norland, creating what it says is the world’s biggest tracker company, from stronger supply chains to an ability to target more international markets
November 30, 2021
Electrical equipment group Schneider Electric and energy major bp are collaborating to help high emission companies achieve their decarbonisation targets.
November 30, 2021
JinkoSolar has slashed its shipments guidance for the year, reducing its top end guidance by more than 5GW as it blamed ongoing logistics issues and port blockages.
November 30, 2021
Solar EPC company iSun is investing in US commercial PV project developer Encore Renewable Energy as part of efforts to accelerate its geographic expansion.
November 30, 2021
The CEO of Hevel Group, Igor Shakhray, will leave the company to become CEO of Unigreen Energy, a silicon wafer and cell manufacturer, which is owned by Hevel majority shareholder Ream Management LLC
November 30, 2021
South Korean LG Electronics has announced a series of new appointments as it aims to target greater growth and customer satisfaction moving into 2022, while also elevating certain critical departments to division level in order to supply them with greater resources

Subscribe to Newsletter

Upcoming Events

Solar Media Events
December 1, 2021
Solar Media Events
February 1, 2022
London, UK
Solar Media Events
February 23, 2022
London, UK
Solar Media Events
March 23, 2022
Austin, Texas, USA
Solar Media Events
March 29, 2022
Lisbon, Portugal