triple junction based high efficiency tandem solar cells
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Triple Junction based High Efficiency Tandem Solar Cells
Submitted by:
Pritam Rath
Regd No: 0911013206
Electrical Engineering
Guided By:Mr. Manas Ranjan NayakAssistant ProfessorDepartment of Electrical EngineeringITER, BHUBANESWAR
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.
SOLAR ENERGY- AN OVERVIEW
The use of solar energy has not been opened
up because the oil industry does not own
the sun.Ralph Nader
P N P N
Solar Power is converted to electricity using PV (Photovoltaic) effect.
HOW TO HARNESS SOLAR POWER
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.
A SOLAR CELL
A SOLAR CELL
A SOLAR CELL
Mono-Crystalline silicon cells
Poly Crystalline Solar Cells
Thin Film Solar Cells
Multi-junction
Solar Cells
TYPES OF SOLAR CELL
Triple Junction based High
Efficiency Tandem Solar Cells
TRIPLE JUNCTION TANDEM CELLS
TRIPLE JUNCTION TANDEM CELLS
Si
Si
Si
Si
Si
Valence Band
Forbidden Band Gap
Ev
Ec
SILICON STRUCTURE
EnergyConduction Band
TRIPLE JUNCTION TANDEM CELLS
As33
In49
Ga31
Electron without bonding
GaInAs STRUCTURE
TRIPLE JUNCTION TANDEM CELLS
Conduction Band
Valence Band
Forbidden Band Gap
Ev
Ec
Energy
Valence BandEv
EcEfEnergy
BandGap
SILICON GaInAs
Conduction Band
Triple Junction based High
Efficiency Tandem Solar Cells
EFFICIENCY ANALYSIS
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.
EFFICIENCY ANALYSIS
EFFICIENCY ANALYSIS
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.
PRESENT AND FUTURE
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.
REFERENCES
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