Web Application for Calculating Short Circuit Current Density (Jsc) from External Quantum Efficiency (EQE).
SUN IN CITY
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3y ago
  Integrated Jsc is an important performance parameter to study solar cells of all available technologies. Calculating this requires a lot of effort as interpolation (for matching EQE data with AM 1.5G spectra) and integration are to be performed with precision. I have made this web application using Python, Streamlit and Heroku to quickly review EQE data. Check it out in the link given below: https://jsc-from-eqe.herokuapp.com/ Just drag and drop your .csv file with first column "Wavelength" and second column "EQE".  Note : Wavelength mus be in nm and EQE must be in percentage. Re ..read more
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World's Largest Renewable Energy Park
SUN IN CITY
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3y ago
     On December 15 2020, India's Prime Minister Narendra Modi, laid the foundation stone of world's largest Renewable Energy Park in Kutch region of Western Gujarat that is set to produce 30 gigawatts of electricity. This Hybrid Solar-Wind mega-park will build along Indo-Pak border and will spread over 72,600 hectares which is equivalent to the total area of Singapore(72,800 hectares) and bigger than many metro cities. That is MASSIVE !! Park is divided into two zones: 1) Hybrid Park : 49,600 hectare of land will cover Hybrid Solar-Wind Power Plant. 2) Wind Park : 23,000 ..read more
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Duck Curve in Solar Energy
SUN IN CITY
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5y ago
Utility companies are doing a great job but one must understand that anticipating the load demand is a critical task. Complexity comes in with the increasing production of electricity from solar energy. Curve shown below represents the load demand curve of electricity in California on 31 March 2012. The blue line in the curve represents the actual load demand in California on 31 March 2012. Least power is required over midnight. During the morning, curve ramps up when offices and schools get started, during evening time curve ramps up to the peak load and then again goes down.  Duck Curve illu ..read more
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CIGS Solar Cells
SUN IN CITY
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5y ago
These are essentially thin film solar cells. So, thin film of CIGS is used as primary absorber. These are essentially called chalcopyrite based solar cells. CuInSe2 ( Copper Indium Selenide ), CuInS2 ( Copper Indium Sulphide ) and CuGaSe2 ( Copper Gallium Selenide ) with band gap of 1 eV, 1.5 eV and 1.7 eV are the major chalcopyrite compounds that are being used for solar cell applications. With  a band gap of 1 eV CuInSe2 ( Copper Indium Selenide ) provides the heighest efficiency and its efficiency can be further increased by addition of Gallium, thus making it Cu(InGa)Se2 (Copper Indium Gal ..read more
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Cadmium Telluride (CdTe) Solar Cell
SUN IN CITY
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5y ago
In 1972, first CdTe/CdS solar cell was reported. It is a type of photovoltaic that uses Cadmium Telluride (CdTe) and Cadmium Sulphide (CdS) thin film for light absorption and charge extraction for generating electricity using the photovoltaic effect. Two major companies that are manufacturing CdTe solar cells are "Antec" in Germany and "First Solar" in US.                 CdTe (Cadmium Telluride) solar cell belongs to the family of chalcogenides (ZnS, ZnSe, ZnTe, CdS, CdSe, CdTe). CdTe is formed by reaction of Cd and Te vapours and then deposition on surface using sputtering, thermal evaporat ..read more
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Staebler Wronski effect in Amorphous Silicon.
SUN IN CITY
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5y ago
In the early stage of technology, amorphous silicon was found to be an interesting material because with doping it can be made P-type or N-type and provided an opportunity for the formation of junction and leading to the formation of solar cells. But after introducing sunlight radiation on solar cell, efficiency decreases and this effect is called Staebler Wronski effect.                     Large number of defects around 1023 / cm3 is present in amorphous silicon due to large number of dangling bonds. There are several missing bonds and these missing bonds are called dangling bonds. Dangling ..read more
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Gallium Arsenide (GaAs) Solar Cells
SUN IN CITY
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5y ago
Gallium Arsenide (GaAs) is a compound of two basic elements; Gallium and Arsenic. It is III-V direct bandgap semiconductor with 1.41 eV band gap, so relatively it can absorb (AM 1.5G spectrum) light more efficiently. This band gap can be varied by Aluminium (Al) or Indium (In) like AlGaAs or InGaAs. First GaAs solar cell was used in space application for Venera 3 mission and then till now, its efficiency has reached up to 29.1 % by Alta Devices. To check the efficiency of all types of solar cells, click here.                      GaAs has several advantages over Silicon such as higher temperat ..read more
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