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Triple junction based high efficiency tandem solar cells
 

Triple junction based high efficiency tandem solar cells

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    Triple junction based high efficiency tandem solar cells Triple junction based high efficiency tandem solar cells Presentation Transcript

    • Submitted by: Pritam Rath Regd No: 0911013206 Electrical Engineering Guided By: Mr. Manas Ranjan Nayak Assistant Professor Department of Electrical Engineering ITER, BHUBANESWAR
    • Present and Future Efficiency Analysis Triple Junction Tandem Solar Cells Solar Cells How to Harness Solar Power Solar Energy – An Overview
    •  The output of sun is 2.8 1023KWH/year. The energy reaching the earth is 1.5 1018KWH/year.  Solar energy technologies include solar heating, solar photovoltaics, Solar air conditioning, Solar lamp, Space- based solar power.
    • P N P N Solar Power is converted to electricity using PV (Photovoltaic) effect.Solar Power is concentrated and converted to thermal energy which is converted to electric energy.
    • Triple Junction based High Efficiency Tandem Solar Cells
    • In 1839, Edmond Becquerel found that two different brass plates immersed in a liquid produced a continuous current when illuminated with sunlight. We now believe that he had made a copper - cuprous oxide thin - film solar cell. Later in the 1870s, Willoughby Smith, W. G. Adams, and R. E. Day discovered a PV effect in selenium. A solar cell is a semi-conducting device made of silicon or other materials, which, when exposed to sunlight, generates electricity. It uses the Photovoltaic technology.
    • Mono-Crystalline silicon cells Poly Crystalline Solar Cells Thin Film Solar Cells Multi-junction Solar Cells
    • Triple Junction based High Efficiency Tandem Solar Cells
    • Si Si Si Si Si Valence Band Forbidden Band Gap Ev Ec SILICON STRUCTURE Energy Conduction Band
    • As 33 In 49 Ga 31 Electron without bonding GaInAs STRUCTURE
    • Conduction Band Valence Band Forbidden Band Gap Ev Ec Energy Valence Band Ev Ec EfEnergy Band Gap SILICON GaInAs Conduction Band
    • Triple Junction based High Efficiency Tandem Solar Cells
    •  The efficiency in recent years have been 60% in satellites and nearly 85% in laboratory for 30cm2 cell at 200 suns.  As compared to its counter parts such as other silicon solar cells having efficiency nearly 20%.  The most important factor is the end-of-life (EOL) efficiency.
    •  Presently this kind of Solar cell technology is only restricted to space applications.  All the Satellites use this kind of Solar Cells.  The main hindrance in the commercialization of this kind of solar cell is the cost.  Cost of these solar cells is $2.48/cm2.  Lots of research work is going on to reduce the price.
    •  T. Takamoto, K. Sasaki et al., Proceedings of the 35th IEEE Photovoltaic Specialists Conference, Hawaii, USA, June 2010.  Research and Development Trends of Solar Cell for Highly Efficiency daisuke kanama, hiroshi kawamoto Nanotechnology and Materials Research Unit, quarterly review no.28/july 2008.  Martin A. Green, Keith Emery, Yoshihiro Hishikawa and Wilhelm Warta, “Solar cell efficiency tables”, Published online 18 June 2010 in Wiley InterScience (www.interscience.wiley.com). DOI: 10.1002/pip.1021.