'Photo' means light and 'voltaic' means electrical current.Ī solar cell provides direct current electricity This is referred as "Photo-voltaic Effect". Sunlight contains packets of energy called photons which can be converted directly Solar Cell: It produces electricity from direct sun light. Fuel Cell: It produces electricity by combining Hydrogen and Oxygen. Wind Turbine: It converts wind energy into electricity. The most popular renewable energy sources are wind turbine, solar cells, fuel cells etc. This page describes solar cell working principle including solar cell components, how solar cell works, solar cell measurements, solar cell efficiency, solar cell manufacturers etc. Given the fact that this technology is more than fifty years old, more research and development are needed to navigate diverse possibilities.Solar Cell working principle | How solar cell works Ultimately, tandem technologies can be a solution to tackle this problem however significant research is still required to enable this at low costs for the mass market. We are also reaching the theoretical limit of single-junction solar cells. Focusing on crystalline Silicon-based PV technology, this standardized industry has a steep learning curve and is well-positioned to meet the challenge of producing many terawatts of power. One of the key challenges is to reduce cost and improve efficiency, this can be addressed by coming up with new market competitive silicon wafer solar module manufacturing methods at a lower cost. Silicon solar cells still dominate the market and it will take some time for other generation solar cells to gain market dominance. The increase in the module power of the panels from 250 W to 500 W in the last decade resulted in the decrease of the relative contribution of the module cost to the total PV system cost. It is for sure that PV deployment will continue to grow as the global energy portfolio transitions more towards renewable energy. According to the Solar Energy Industry Data (SEIA) for the last decade, the global PV industry has been growing at an average compound annual rate greater than 35%. Solar energy has advanced at a rate that is astonishing even to experts in the field and now promises to have a prominent role in the ongoing energy transition. Each has its own advantages and disadvantages. Thin films include cells made by different materials, unlike silicon solar cells. Major types of Solar panels available today in the market are monocrystalline, polycrystalline, and thin-film panels. The average cost of a solar panel dropped by 90% from 2010 to 2020. The figure below represents the first-ever patented silicon P-N -EMF (PN junction Electromotive force ) cell.įigure 3: trend in the reduction of the cost.īigger factories, the use of automation and more efficient production methods have delivered economies of scale, lower labor costs, and less material waste for the solar sector. Ohl cut a section from the ingot including the top, barrier, and bottom portions, and attached electrodes to the top and bottom portions, yielding the first silicon solar cell. With the rise of semiconductors in 1941, Russel S Ohl described a process of forming silicon ingots that led to the first P-N junction cell. In the 1960s and 1970’s the production of solar panels was made possible but the downside was it was too expensive for mainstream consumers but scientists continued to develop solar energy technology to reduce the cost. This breakthrough led the US government to pour more money into solar cell technology. This breakthrough is credited to Daryl Chapin, Calvin Fuller, and Gerald Pearson which produced an efficiency of 4% only. The solar era began in 1950 when Bell Laboratory scientists focused on photovoltaic (PV) developments and began utilizing silicon to produce solar cells. This invention led to the launching of a movement for producing solar energy. The resulting cells had a conversion electrical efficiency of only about 1%. The first solar panel was invented by Charles Fritts in 1883 where he coated a thin layer of selenium with an extremely thin layer of gold. But this wasn’t widely recognized until Einstein wrote a paper about the power of solar for which he eventually received the Nobel prize in 1922. He realized when electrons were in an excited state in a conduction band, they could move freely through a material, thus creating a current. In 1839, French scientist Edmond Becquerel discovered the photovoltaic effect at the young age of 19. The history of solar energy is a story of innovation that all started in the early 19th century. This change would be iterated over and over to make new progress in the field of solar energy by researchers and is still going on. The very first discovery of the solar cell marked the beginning of the change in energy production.
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