Sustainable Power Solution by Monolithic Integrated PV-Battery

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Jaber, Mohammed
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An-Najah National University
The global energy crisis and energy conservation for sustainability the most concern of the scientific community and solar energy is one of the leading solutions to this crisis. Improve the efficiency of solar cells and energy storage systems the most important topics, where efficiency record of (26.6%) of c-Si solar cells. Also find an efficient energy storage system from solar cells ensure provided energy at times of absence of a light source. Solid-state battery most common component used to store and reuse electrical energy. By combining these two systems (high efficient solar cells and solid-state battery) to get integrated photovoltaic-battery (PV-battery) will be founded a sustainable solution. This study will review the accurate description for design stages of the PV part of the proposed Integrated system and design three terminal/triple-junction solar cell (3T-device). Deposit multi-junction TFSC composed from amorphous (a-Si:H) as top subcell, and microcrystalline (μc-Si:H/μc-Si:H) as bottom tandem subcell, with (p-i-n/n-i-p/n-i-p) configuration respectively, through PECVD technology. Upgraded 2T-device which had deposited to 3T-device to solve mismatching current problem by inserting new terminal between the top and bottom tandem subcell. Also, developed voltage of 3T-device to solve mismatching voltage occur between the top and bottom tandem subcell. As a result of that, has been achieved matching voltage reach to 95.67% (0.853, 0.816, 0.841 V, top, bottom, and total cell respectively). In addition, spectral response for 3T-device under different light sources (AM1.5, LED, fluorescent-tube, halogen), and different levels of light intensity (1sun to 0.0000194sun) had been studied. Measure and analysis of cell parameters (VOC, ISC, FF, η) as a function of current intensity (JSC) shown 16.4% efficiency under LED light source. likewise, analysis parameters of 2T-device, Perovskite, and SHJ under different light sources and light intensity to hold comparison between them with 3T-device. Clearly shown good performance of perovskite under LED and SHJ under AM1.5 which recorded efficiency reach about 29% and 15.4% respectively. Studied behavior of light beam through window cell and determination of the parameters causing the optical losses shown the main effect of a (ZnO/Ag/ZnO) as back contact of top subcell. In the final stage, check the ability of 3T-device to charging of a commercial battery model (135mAh, 3.7V) which recorded solar energy to charge conversion efficiency around (10%) under (AM1.5) light source.
Sustainable Power Solution by Monolithic Integrated PV-Battery