Advances in semi-transparent photo voltaic cell know-how drive future vitality options for buildings
by Riko Seibo
Tokyo, Japan (SPX) Oct 27, 2025
Researchers at The Hong Kong Polytechnic College have succeeded in establishing a brand new benchmark for semi-transparent natural photovoltaic (ST-OPV) know-how, an innovation enabling the mixing of photo voltaic cells into home windows, screens and different surfaces for city environments. ST-OPVs deal with the essential problem of balancing transparency with excessive energy conversion effectivity, combining enticing visible design with efficient vitality era for good constructing integration.
A key achievement of the PolyU group was the event of the dimensionless parameter FoMLUE, which screens photoactive supplies by combining visible transmittance, bandgap and present density, permitting a deeper understanding of fabric properties by normalized absorbance evaluation. Led by Prof. LI Gang and Analysis Fellow Dr YU Jiangsheng, the group demonstrated that ST-OPVs using ternary supplies with the best FoMLUE achieved superior thermal insulation and operational stability, with a brand new document gentle utilization effectivity of 6.05 percent-the highest reported determine for any semi-transparent photo voltaic cell.
The analysis additional evaluated geographical influences on system efficiency, creating a transient mannequin to simulate ST-OPV window energy output. Utilized throughout 371 Chinese language cities, outcomes indicated annual load reductions in additional than 90 % of areas. Areas with scorching summers and heat winters displayed the best suitability, with annual whole vitality financial savings reaching as much as 1.43 GJ per sq. meter. This method means that ST-OPV glazing can improve constructing vitality effectivity with out compromising aesthetic enchantment.
Prof. Li acknowledged, “As an rising photo voltaic photovoltaic know-how, photo voltaic home windows provide new prospects for sensible deployment in BIPV, renewable vitality autos and agricultural greenhouses. Our findings spotlight the multifunctionality and geographical adaptability of high-performance ST-OPVs within the building of sustainable and energy-saving good home windows with out compromising the integrity of architectural design, showcasing their extremely promising industrial prospects.”
The PolyU group intends to additional strengthen ST-OPV sturdiness and to scale manufacturing for bigger photo voltaic modules to advance industrial implementation.
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The Hong Kong Polytechnic University
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