Optical amendment of blue semi-transparent photovoltaic glass panes using a Eu3+-based down-conversion phosphor for enhanced UV-light protection and power conversion efficiency
Elias Stathatos a, Dimitris Chalkias a b, Archontoula Nikolakopoulou a, Argyroula Mourtzikou b
a Nanotechnology & Advanced Materials Laboratory, Department of Electrical and Computer Engineering, University of the Peloponnese, GR26334 Patras, Greece
b BRITE Solar Technologies, Patras Science Park, Stadiou Str., Platani, Rio, GR26504 Patras, Greece
Poster, Elias Stathatos, 181
Publication date: 6th February 2024

From the beginning of this century, with the introduction of colored architectural glass in the market, blue glass chunks have already been used in many buildings, offering increased functionality and appealing aesthetics compared to fully transparent glass. At the same time, the emergence of new photovoltaic (PV) technologies with increased engineering capabilities of their optical characteristics has opened the way for the development of new building-integrated PV systems, where even a glass façade can produce electrical power for partial/full coverage of the ever-rising energy needs. The present work aims to introduce a novel way for power conversion efficiency (PCE) enhancement of blue dye-sensitized solar cells using a transparent to visible light electrolyte with luminescent down-conversion characteristics. To this purpose, a Europium complex with appropriate chromophores as antennas is integrated into the composition of an iodine-free electrolyte to capture the UV light and convert it to visible light, able to be exploited by a blue dye-sensitizer. The down-conversion material presents intense luminescent characteristics with a large Stokes shift (>250 nm), able to enhance the PCE of the solar cell, even when used in small amounts. Employing the abovementioned approach, dye-sensitized solar mini-modules of 100 cm2 aperture area that were developed using piezoelectric drop-on-demand inkjet printing demonstrated an enhanced performance of up to 15% without significant alleviation of their transparency in the visible spectrum of light, while the permeability of the UV light through the system was decreased by up to 60%. The results of the present approach are important since they open the way for new spectral engineering approaches in novel solar energy systems for new and niche applications.


This research was funded by the Hellenic Foundation for Research and Innovation (H.F.R.I.) under the “2nd Call for H.F.R.I. Research Projects” (PV Lumo-project number 3730).



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