The Best4U project is an industrial research project aimed at finding solutions to increase the efficiency of photovoltaic modules over 25%, and improve bifaciality, because this significantly reduces the BOS and the LCOE. To obtain this improvement in efficiency and productivity, the concept of a 4-terminal photovoltaic module is proposed. 4T cells and modules can be considered as an alternative to tandem photovoltaic cells with some significant advantages. The conventional monolithic tandem cell connected in series has the limitation of the reticular parameter and current matching of the 2 cells in series. On the contrary, the 4-terminal structure does not suffer from these limitations and this adds considerable degrees of freedom. The present proposal therefore has as its objective the realization of a 4-terminal cell / module in which the bottom cell is a bifacial type heterojunction Si cell and the top cell is a wide band gap semiconductor cell. The double-sided bottom cell collects and transforms the red and infrared sunlight incident through the top cell into electrical energy from the front and the albedo light reflected / diffused from the ground from the rear. The top cell collects and transforms the blue portion of the incident solar spectrum. The goal is an efficiency in standard conditions greater than 25%. For this purpose, some approaches will be studied in parallel and compared, and the most promising will be defined. A double-sided photovoltaic field demonstrator will also be created, optimized for the exploitation of the soil albedo with a productivity in kWh / kWp greater than 20% compared to the single-sided system.
Area Tematica:Energy, Environment
Starting yers:2020
End years:2022
Call:PON ARS01_00519
Acronym:BEST4U
Title:Bifacial Efficient Solar cell Technology with 4 terminal architecture for Utility-scale
Budget ISM (k€):50
RoleISM:Team member
Referent ISM:Gloria Zanotti
Other relevant roles:Aldo Di Carlo OR3 Leader, Gloria Zanotti responsabile attività.
Other ISM staff involved:Anna Maria Paoletti, Antonio Santagata, Patrizia Dolce
Laboratory: Syn-o-Mat