Employing Novel Si-Over-Si Technology to Optimize PV Effect in Solar Array

Double layer silicon over silicon (Si-over-Si) solar cell uses transition metal-based organometallic complexes for low to high energy photon absorption and energy conversion (renewable energy). The metal oxides and organic compounds incorporated for the second layer fabrication must have high photovoltaic potential, high thermal conduction, capability to spread into a thin layer and be available at a low cost. In this work, a ruthenium polypyridine complex anchored with Rhodamine B (fluorescent dye), Molybdenum trioxide (MoO3) (high thermal and electrical conductivity), and SiO2 nanoparticle (semiconductor) was placed over a low voltage (9 V) silicon-based solar panel. The development of Ru-Si-Mo-Rod.B hybrid thin-film nanoparticles with a molecule size of 250 nm is supported by SEM and TEM analysis. When compared to their undoped ruthenium (II) tris-bipyridine [Ru(II)(bpy)3] complex, the electronic absorption spectroscopic analysis of the organometallic complexes demonstrates a shift in absorption intensity value. This thin film coating demonstrated spectacular photoelectron absorption and conversion efficiency on a 9 V conventional silicon cell panel. A maximum and minimum output voltage of 14.4 V (160%) and 13.55 V (150.5%), respectively, was obtained instead of 9 V at different periods, which corresponds to strong and weak solar energy radiation on a single day. The obtained result has overcome the world record value of 44.4% (multi-die fabrication), 44.0% (multilinked assembly), and 14–19% (multi-crystalline Si solar cells) in photo energy efficiency enhancement. The presence of high luminescent Ru-Si-Mo-Rod.B hybrid organometallic dye causes collective optimization in photoelectron generation and conversion at low and high light times. The double-layer technique on conventional solar cells has no thermal stability issue as seen as a major issue in Dye-Sensitized Solar Cells (DSSC). This work offers a new nano-porous semiconductor coating model based on a hybrid metal complex or simply organometallic fluorescence complex to improve light-induced electron transport inside the conduction band of a low-voltage solar cell.

» Reference: 10.1007/s12633-022-01976-1

» Publication Date: 28/06/2022

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This project has received funding from the European Union's Horizon 2020 research and innovation programme under grant agreement Nº 768737


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