Graphene solar panels low cost with transparent electrodes cells
A lot of people looking for upgrading the performance of an established low-bandgap solar technology without adding much cost is to deposit a high bandgap polycrystalline semiconductor on top to make a tandem solar cell.
Solar panels current tech :
Now we use a transparent silver nanowire electrode on perovskite solar cells to achieve a semi-transparent device. We place the semi-transparent cell in a mechanically stacked tandem configuration onto copper indium gallium diselenide (CIGS) and low-quality multi-crystalline silicon (Si) to achieve solid-state polycrystalline tandem solar cells with a net improvement in efficiency over the bottom cell alone. This work paves the way for integrating perovskites into a low-cost and high-efficiency (>25%) tandem cell. Introduction In the last several years the photovoltaic industry has grown rapidly and large factories have achieved superb economies of scale that have enabled the manufacture of modules with power conversion efficiency in the range of 14-21 % based on silicon (Si), cadmium telluride (CdTe) and copper indium gallium diselenide (CIGS) at a cost less than $1/W.1,2Despite this progress, photovoltaics produces less than one percent of the world’s electricity and there is a strong desire to both continue reducing costs to less than $0.5/W while also raising the power conversion efficiency above 25 %.
Graphene solar panels transparent electrodes cells:
Researchers aim to Develop transparent or semitransparent solar cells with high efficiency and low cost to replace the existing opaque and expensive silicon-based solar panels have become increasingly important due to the increasing demands of the building integrated photovoltaics (BIPVs) systems.
The Department of Applied Physics of The Hong Kong Polytechnic University (PolyU) has successfully developed efficient and low-cost semitransparent perovskite solar cells with graphene electrodes (“Efficient Semitransparent Perovskite Solar Cells with Graphene Electrodes,”). The power conversion efficiencies (PCEs) of this novel invention are around 12% when they are illuminated from Fluorine-doped Tin Oxide bottom electrodes (FTO) or the graphene top electrodes, compared with 7% of conventional semitransparent solar cells. Its potential low cost of less than HK$0.5/Watt, more than 50% reduction compared with the existing cost of Silicon solar cells, will enable it to be widely used in the future.
Solar energy is an important source of renewable energy, in which solar cell will be used to convert light energy directly into electricity by photovoltaic effect. The first generation crystalline silicon solar panel is highly stable with efficient energy conversion but opaque and expensive. The second generation solar cell, namely thin film solar cell, is light in weight and can be made flexible. However, they are made of rare materials with complicated structure and need high-temperature treatments.
With the research objectives of producing solar panels of high PCEs, easy fabrication, and low cost, in recent years, scientists have been investigating the third generation solar cells. Perovskite solar cell as a novel third generation solar cell has attracted much attention recently due to its high power conversion efficiency, convenient fabrication process, and potentially low cost.