World's Largest Fully Transparent Organic Photovoltaic Window, world record set in California

June 24, 2025

Goleta, California, United States--California-based organic photovoltaic (OPV) start-up Next Energy Technologies has unveiled a 101.6 cm x 152.4 cm laminated transparent power-generating window that was produced with the company’s pilot production line; the window is built with a substrate, a transparent OPV layer, an edge seal, a busbar, a junction box and cover glass, setting the world record for being the World's Largest Fully Transparent Organic Photovoltaic Window, according to the WORLD RECORD ACADEMY.

"California-based organic photovoltaic (OPV) start-up Next Energy Technologies has unveiled what it claims to be the world’s largest fully transparent organic PV window. The 101.6 cm x 152.4 cm laminated transparent power-generating window was produced with the company’s pilot production line. The window is built with a substrate, a transparent OPV layer, an edge seal, a busbar, a junction box and cover glass," the PV Magazine reports.

"Next Energy uses automated slot-die coating manufacturing techniques to apply its proprietary OPV directly onto glass. The company’s coatings are laid on the glass, and a laser is used to scribe the OPV layer before laminating it.

“Our highly refined process is a versatile deposition technique in which a solution is delivered onto a substrate via a narrow slot positioned close to the surface,” the company explained. Glass fabricators can add the slot-die process to their existing manufacturing capabilities."

"NEXT Energy Technologies has unveiled the world's largest fully transparent organic photovoltaic (OPV) window, measuring 101.6 cm by 152.4 cm (approximately 3.3 feet by 5 feet)," the AI Overview reports.

"This laminated, power-generating window was developed using the company's pilot production line and is made possible by their unique OPV technology, which utilizes organic semiconductors to harness solar energy."

"Successfully applying a transparent OPV coating on 40” x 60” laminated vision glass is a significant accomplishment for NEXT and the BIPV industry. This is the largest format laminated transparent power-generating window yet produced and further demonstrates the scalability of NEXT’s technology," the Next Energy Technologies reports.

Dimension: 40” x 60” (W x H)

Cel Type: NEXT Transparent Organic Photovoltaic

Visible Light Transmission: 32%

Vision Glass Power Efficiency: 3.5%

Having completed upgrades to the NEXT pilot production line, NEXT is now pursuing demonstration projects and initiating the UL Certification process."

"Next Energy Technologies, a California-based organic photovoltaic (OPV) start-up, has unveiled what it claims is the world’s largest fully transparent organic PV window," the Interesting Engineering reports.

"Measuring 101.6 cm by 152.4 cm (3.3 feet x 4.9 feet), the laminated power-generating window was developed using the company’s pilot production line.

"The new product features a transparent OPV layer integrated into a substrate, along with an edge seal, busbar, junction box, and cover glass."

“The combination of highest quality aesthetics, power generation, and integration with the glass supply chain is a game changer in the push towards designing Net Zero buildings,” stated Andy Cohen, Gensler Co-Chairman. Just mid-last year, we were demonstrating NEXT’s 27” x 35” OPV windows at our office in LA, and with this larger window format, we have sustainable building projects in our sights," the Next Energy Technologies reports.

“This milestone is further evidence to an industry hungry for a solution that our combination of OPV coatings and advanced manufacturing processing is working, scaling, and can be rapidly deployed,” said Daniel Emmett, Co-Founder, Executive Chairman, and CEO of NEXT. “It’s a proof point that builds high confidence in our path to enabling 60” x 120” commercial production.”

About NEXT Energy Technologies

NEXT Energy Technologies, a Santa Barbara, California company, is revolutionizing the clean energy and building industries with its innovations in organic photovoltaic (OPV) technology. The NEXT solution empowers architects and building owners to transform traditional windows and glass facades into producers of low-cost, on-site, renewable energy for buildings, a practical and inspiring solution for a sustainable future.

NEXT’s OPV is born out of Nobel Prize-winning work at UC Santa Barbara and is funded in part by the California Energy Commission. NEXT’s proprietary organic semiconducting materials are earth-abundant, low-cost, and processed using a high-speed, scalable, and low-energy process.

"NEXT Energy Technologies has upgraded its pilot production line to create large, transparent, power-generating windows measuring 40” x 60”. These are the biggest transparent organic photovoltaic (OPV) windows ever made, showcasing the scalability of NEXT’s automated slot-die coating process," the Solar Quarter reports.

"This milestone brings the glass industry closer to producing full-scale solar-powered facades. NEXT’s OPV coating tackles key challenges—appearance, efficiency, and manufacturability—by offering a neutral grey tint, efficient power generation, and seamless integration into existing glass production.

"The company is now working with partners in the US and Europe to install demonstration projects while scaling up for full production. NEXT is also pursuing UL certification for safety and performance in grid-connected applications. Buildings using these OPV windows can generate 20-25% of their energy needs while reducing HVAC costs by converting infrared light."

"With support from the California Energy Commission and in collaboration with our IGU fabrication and framing system partners Viracon and Walters & Wolf, we built a functioning technology viewing wall of 26 sq ft of transparent OPV glass using four 27” x 35” IGUs in a 3-sided captured frame," says the Next Energy Technolgies.

"NEXT Technology:

Proprietary Organic Photovoltaic (OPV) Coating
Environmentally Designed
Produced in the USA

Funding by State of California Energy Commission

"NEXT Energy Technologies' transparent OPV is an innovation breakthrough for architects that will really change the game plan for sustainable buildings in the near future and for net zero construction for decades to come by turning a building's glass facade into a source of clean, renewable energy," says Andy Cohen, Co-Chairman Gensler and NEXT Board Member.