Honeywell solar PV AR coating development enables easier application, less materials use - Photovoltaics World
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Honeywell solar PV AR coating development enables easier application, less materials use

February 24, 2011 -- Honeywell (NYSE: HON) Electronic Materials expanded its line of SOLARC anti-reflective coating materials to include a new formulation that allows for easier application and less material usage. Honeywell SOLARC RPV is applied through single-sided roller coating application, which is easier and allows panel manufacturers to use less material than alternative coating methods.

The SOLARC RPV coating is designed for single-sided roller coating application, which benefits from lower material consumption relative to other coating methods. The new coating offers SOLARC coating's advanced light transmittance and high durability. With single-sided applications, it also enables perfect index of refraction (RI) matching between air and glass, while avoiding RI mismatch at the glass and EVA interface seen on double-sided coatings.

Demonstrating a 4% increase in transmittance at 550nm, SOLARC RPV coating has consistently produced 3 to 3.5% average transmittance gain across a solar spectrum relevant for PV cell operation (350 through 1,100nm). The new coating has also demonstrated superior durability in a broad variety of accelerated tests designed to imitate harsh environmental conditions to which a PV panel is likely to be exposed during its lifetime.

SOLARC materials are based on advanced materials used in semiconductor manufacturing. They are transparent coatings that improve the light transmittance through the glass that covers photovoltaic (PV) panels. These coatings also significantly reduce glare from the glass, allowing the PV panel to better blend with its surroundings.

"SOLARC RPV coating achieves industry-leading transmittance capability while improving ease of application and reducing the amount of material needed," said Dr. Lin Zhu, senior product line director for Honeywell Electronic Materials.

Most commercially available PV panels lose approximately 4% of their potential power output due to light reflection from the front surface of the cover glass, the company states. Honeywell's SOLARC coatings reduce reflection significantly. Honeywell introduced the SOLARC line of materials in 2009 with SOLARC SPV coating, which is formulated for spray-coating application.

Honeywell's portfolio of materials for the PV industry includes backing sheet laminates, printable phosphorous and boron dopants, solar-grade electronic chemicals, solder-coated copper ribbon, and precision thermocouples. More information is available at

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