The work performed and the main results achieved are:
• Definition of requirements and specifications of the glazing system proposed for the Tech4Win window, including the analysis, selection and quantification of the key parameters to design and warranty the performance of the Tech4Win glazing system and the identification and analysis of main standards, regulations and technical codes;
• Development of semi-transparent OPV devices using polymers compatible with stability and industrial requirements, with the demonstration of solar cells with PCE 4.55% - 5.04% and AVT 41% - 59%, and the demonstration of optimized DBR’s allowing a relative increase of 5%-6% of PCE. Durability studies of the active layers performed under 1 sun illumination conditions show fulfillment of stability targets (relative PCE degradation < 15% after 1000 h) when using UV filters developed in the project;
• Development and UV multifunctional ZnO and Zn(S,Se) coatings free of CRMs with band gap > 2.6 eV, high transparency (AVT in range 65% - 70%) and UV filtering > 99%;
• Demonstration of first proof of concept UV selective Zn(S,Se) solar cells with AVT = 69% and PCE = 0.5%.
• Demonstration of alternative ZnO/a-Si cell devices with PCE between 0.6% and 2% and AVT values ranging of 65% and 35%, respectively. Design of optimal device architecture with estimated PCE = 2.5% and AVT 40%
• Multifunctional modelling of the UV and IR selective devices and of the Tech4Win window configurations, including: i) Implementation of optical models for the simulation of the Tech4Win window structure integrating the UV and IR selective devices, the DBR and the different glass panes and encapsulant layers for optical and aesthetic optimization; and ii) Definition and implementation of the BIPV widow subroutines for the modelling of the passive window properties in representative building cases (residential, offices);
• Prototype implementation and demonstration, including: i) development in ASPF of first RtR module devices transferring the processes developed at lab level; and ii) definition of lamination processes at Onyx using IR and UV test devices representative of the final device configurations, with the demonstration of the stability of the OPV laminated devices under 1000 h DHT conditions. Demonstration of 30 x 30 cm2 laminated IR modules with CRI = 89, AVT = 42% and PCE = 2.75%;
• Development of a systematic LCA and LCC analysis.
• Dissemination and communication activities have been developed according to the PDER that was defined at the early stage of the project, adapted to the restrictions imposed by the Covid pandemic situation, including the launching of the project website and social media channels, two promotional project video, three Newsletter issues, the organization of two workshops (virtual, hybrid) on Transparent PV and the presentation of relevant project results at highly recognized International Conferences and scientific journals;
• At Exploitation level, the IPR and Knowledge management strategy has been defined according to the background of each partner, the ownership of the foreground identified and the exploitation agreements among the parties involved. On the other hand, first versions of the Tech2Market analysis and Feasibility Study and Exploitation Strategy for all knowledge created in the project have been accomplished and have been constantly updated according to the project progress. The Feasibility Study has already been continuously updated.
