SolarWindow Tech sets new 14.72% record for flexible OPV power-conversion efficiency
SolarWindow Technologies, Inc., a developer of transparent liquid coatings and processes for generating electricity on glass and plastics has more than doubled its prior certified performance, also achieving the highest independently-certified power conversion efficiency of previous organic photovoltaic devices fabricated at the US Department of Energy's National Renewable Energy Laboratory in Golden, CO, through a Cooperative Research and Development Agreement (CRADA).
SolarWindow reported a record 14.72% (+/-0.29%) power-conversion efficiency using industry-standard single-cell patterning for performance testing. Spurred by these positive results, engineers are already working to further optimize power conversion efficiency for a single cell, and additionally translate this record efficiency to large-scale SolarWindow applications for products such as electricity-generating glass windows for buildings, automotive sunroofs, and more.
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"This remarkable efficiency tangibly demonstrates SolarWindow capabilities to the marketplace by setting a new standard for power conversion efficiency, the absolute metric for determining how much power is generated from light. This is only the beginning," says Dr. James Whitaker, SolarWindow principal scientist and vp-Technology Development.
Last quarter, SolarWindow management announced plans to increase power and prototyping capabilities. Within weeks, Dr. Whitaker and his team achieved a 500% increase in testing speed, 12-fold greater testing capacity and output, and 20-times reduction in material costs for rapid lab-scale prototyping of SolarWindow electricity-generating glass. Only 60 days later, the SolarWindow team successfully engineered, fabricated, tested, and independently certified the highest power conversion efficiency organic photovoltaic device thus far in its CRADA with NREL, more than doubling past performance.
The company has repeatedly exhibited the aesthetic appeal of its transparent glass window panes generating electricity, and successfully demonstrated suitability to low-cost manufacturing and materials.
Unlike conventional solar panels, SolarWindow applies ultra-thin layers of its LiquidElectricity coatings and processes to plastics and glass, which then generate electricity. Available in a variety of colors and transparencies, these liquid coatings are 1/100th the thickness of a human hair and can be applied using low-cost and high-throughput methods typical to commercial manufacturing of tinted window films,digital displays, semiconductors, and newspaper printing.
14.72% Power Conversion Efficiency, Independently Certified
"Today's announcement represents a significant step toward realizing large-area, but more importantly high-efficiency, organic photovoltaic (OPV) technologies," explains Dr. Bryon Larson, NREL Scientist and Project Leader of the SolarWindow CRADA.
Notably, this record-setting achievement has been enabled by the support of Raynergy Tek. The company's long-standing collaboration with Raynergy has optimized the power and transparency of SolarWindow electricity-generating products under development. Headquartered in Taiwan and backed by several publicly listed companies, Raynergy Tek is a leader in OPV technology and develops next-generation materials in chemistry, materials science and device physics.
SolarWindow device performance measurement and certification was conducted independently from the CRADA team by NREL's Device Performance Measurement Laboratory.