New Solar Glass Coating Increases Efficiency
The AHP@Eu/HSNs system boosts light transmission by 2.1 percent by converting UV light for use in photovoltaic cells.
Updated on Oct. 15, 2026 in Energy
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Researchers have developed a multifunctional glass coating, known as AHP@Eu/HSNs, designed to improve the performance of solar panels through ultraviolet light conversion and a self-cleaning surface. The research-stage coating, introduced in 2026, aims to solve issues related to light transmission and surface contamination in photovoltaic systems.
Why it matters
This technology addresses three persistent limitations in solar energy efficiency: spectral mismatch, surface reflection, and performance degradation caused by dirt accumulation. By converting non-harvested UV light into useful visible light while maintaining high durability, the coating offers a potential pathway to increase the baseline power output of photovoltaic hardware.
The coating achieves a 93.6 percent light transmittance, marking a 2.1 percent increase over bare glass. It demonstrates high durability by surviving 100,000 abrasion cycles at 10 kPa and 1,000 tape-peel tests.
The details
The AHP@Eu/HSNs system uses a base layer of hollow silica nanoparticles to reduce reflection and a fluorescent, liquid-repellent top layer to enable self-cleaning. It functions by shifting ultraviolet light in the 200 to 400 nm range into visible light between 400 and 800 nm, which solar cells can more efficiently convert into electricity. A dual-crosslinking strategy anchors the coating by using a hexamethylene diisocyanate trimer to bond polydimethylsiloxane to a silica sol network, protecting the structure against photo-oxidative scission and mechanical detachment.
Timeline
2026: The AHP@Eu/HSNs glass coating system reached its developmental milestone.
The Tech Race
This development follows the industry-wide effort to capture spectral losses in photovoltaic arrays to improve absolute conversion efficiency. It sits among ongoing material science initiatives aiming to match the durability of current commercial anti-reflective coatings while adding active light-harvesting capabilities.
This technology is currently in the research stage and not yet available for commercial photovoltaic hardware. Its future integration will likely depend on manufacturers validating these durability figures against real-world, decades-long outdoor environmental stress testing.
The takeaway
The AHP@Eu/HSNs system demonstrates that passive glass treatments can simultaneously tackle optical reflection and light conversion. Future progress will be marked by the transition from lab-scale 30-day UV testing to multi-year pilot programs on utility-scale solar farms.
Further reading
For more on the current state of efficiency improvements in hardware, see our research in Energy.
Source note: This article includes information reported by European Coatings.
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