Submitted by:
Pritam Rath
Regd No: 0911013206
Electrical Engineering
Guided By:
Mr. Manas Ranjan Nayak
Assistant Professor...
Present and Future
Efficiency Analysis
Triple Junction Tandem Solar Cells
Solar Cells
How to Harness Solar Power
Solar Ene...
 The output of sun is
2.8 1023KWH/year. The
energy reaching the earth is
1.5 1018KWH/year.
 Solar energy technologies
in...
P
N
P
N
Solar Power is converted to
electricity using PV
(Photovoltaic) effect.Solar Power is concentrated
and converted t...
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
il...
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
Conductio...
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...
 Presently this kind of Solar cell technology is only
restricted to space applications.
 All the Satellites use this kin...
 T. Takamoto, K. Sasaki et al., Proceedings of the 35th
IEEE Photovoltaic Specialists Conference, Hawaii, USA,
June 2010....
Triple junction based high efficiency tandem solar cells
Triple junction based high efficiency tandem solar cells
Triple junction based high efficiency tandem solar cells
Triple junction based high efficiency tandem solar cells
Triple junction based high efficiency tandem solar cells
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

  1. 1. Submitted by: Pritam Rath Regd No: 0911013206 Electrical Engineering Guided By: Mr. Manas Ranjan Nayak Assistant Professor Department of Electrical Engineering ITER, BHUBANESWAR
  2. 2. Present and Future Efficiency Analysis Triple Junction Tandem Solar Cells Solar Cells How to Harness Solar Power Solar Energy – An Overview
  3. 3.  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.
  4. 4. 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.
  5. 5. Triple Junction based High Efficiency Tandem Solar Cells
  6. 6. 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.
  7. 7. Mono-Crystalline silicon cells Poly Crystalline Solar Cells Thin Film Solar Cells Multi-junction Solar Cells
  8. 8. Triple Junction based High Efficiency Tandem Solar Cells
  9. 9. Si Si Si Si Si Valence Band Forbidden Band Gap Ev Ec SILICON STRUCTURE Energy Conduction Band
  10. 10. As 33 In 49 Ga 31 Electron without bonding GaInAs STRUCTURE
  11. 11. Conduction Band Valence Band Forbidden Band Gap Ev Ec Energy Valence Band Ev Ec EfEnergy Band Gap SILICON GaInAs Conduction Band
  12. 12. Triple Junction based High Efficiency Tandem Solar Cells
  13. 13.  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.
  14. 14.  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.
  15. 15.  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.

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