Bandgap Engineering Demonstrates Record Performance for Low-Cost Nanotextured Silicon Solar Cells

Bandgap's nanotextured solar cells are a drop-in upgrade for today's crystalline silicon manufacturers using standard processing technologies.

WOBURN, Mass.--Bandgap Engineering, Inc. announced today that its proprietary and patented nanotextured silicon solar cells demonstrated a 0.3% absolute efficiency boost over industry-standard solar cells. The Bandgap nanotextured, 156 mm multicrystalline silicon cells, made in collaboration with Georgia Institute of Technology, achieved average efficiencies of 16.7%, as compared to industry-standard control cells that averaged 16.4%. Importantly, all the cells were processed using conventional processes including a standard emitter, silicon-nitride, screen-printed metallization with an aluminum back surface field.


"This efficiency boost is particularly impressive given that we have just begun to tune the cell process for our nanotextured silicon solar-cells," stated Marcie Black, CTO of Bandgap. "When fully optimized we expect our cells will have an efficiency approximately 1% absolute higher than standard multicrystalline cells."

"These results validate our strategy to upgrade existing crystalline silicon production lines with a low-cost, drop-in improvement," commented Richard Chleboski, CEO of Bandgap. "We are ready to work with manufacturers interested in upgrading their production lines to sell a premium, differentiated products at lower costs per watt. In short, when fully implemented, our partners will be able to obtain monocrystalline cell performance and pricing with multicrystalline wafers and costs."

Bandgap's nanotextured solar cells are a drop-in upgrade for today's crystalline silicon manufacturers using standard processing technologies. As the technology gives low reflection for all grain orientations, it is an ideal upgrade for multicrystalline wafers, which have higher reflection. Additionally it can enable several high efficiency and lower cost processes which are already on many manufacturers roadmaps. Specifically the single sided texture enables processes that require planer back surfaces for improved reflection or passivation. The low silicon consumption, less than 1 um is consumed in the texturing process, is ideal for thin silicon technologies. Also, Bandgap has developed approaches to pattern its silicon nanowires that can enable plated front metal contacts without laser patterning or lithography.

About Bandgap Engineering, Inc.

Bandgap has pioneered the development of highly tunable and inexpensive methods for nanostructuring silicon and is applying this technology to high efficiency silicon-based photovoltaic cells and high capacity Li-ion batteries. Founded in 2007, the company is venture-backed by New Enterprise Associates, Presidio Ventures and the Massachusetts Green Energy Fund and is based in Woburn, MA. For more information, visit the Bandgap web site at www.bandgap.com.

Featured Product

Baja Carports Design-Build Solar Support Systems™

With Baja Carports 35 plus years in the industry installing our Solar Support Systems nationwide and whose founder Bob Hayworth was one of the first to use solar panels as the rooftops on commercial carports ~ is assurance that you will receive Baja expertise in all phases of installation. Our team's diligence makes the design-build process easy for customers. You don't need a set of architecture plans to begin talking to us about your project. Baja's in-house design engineers will work closely with you to meet your project specifications and city's criteria. You'll have our design team's years of experience applied to your plans. Our engineers will deliver a set of stamped plans, which maximize canopy coverage and details the most-effective layout for your business' parking lot.