ORGANIC SOLAR CELLS

ABHAS DASH

ECE-D

1141015217

ITER,SOAU

March 17, 2015

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Under the Guidance of : Mr. Suraj Kumar Das

March 17, 2015

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CONTENTS

• A Fact

• About Photovoltaic cell

• Why organic solar cells ?

• Which Polymers are used ?

• Structure of Organic Solar Cell

• Application of OSC

• Manufacturing costs

• Environmental Impact

• Disadvantages

• References

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A FACT :

• Earth receives enormous

energy to fulfill the yearly

demand of energy in less

than an hour.

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Classical photovoltaic solar cells

based on inorganic

semiconductors (Silicon) was

developed in 1954 by Chapin,

Fuller and Pearson in the Bell Labs.

•Some of its demerits :

Silicon is expensive.

Not flexible

Limited availability of inorganic

material.

ABOUT PHOTOVOLTAIC

CELL

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WHY ORGANIC SOLAR CELLS

???

Ease of Processing

Mechanical flexibility

Economically viable

Safer environment

Unlimited availability

Less expensive than inorganic

materials (Si).

Compatibility (thin cells)

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Polymer used for organic solar cells :

•FBJs (Fullerene bulk heterojunctions)

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Commonly used DONORS ( p-type Materials):

• MDMO-PPV : Poly[2-methoxy-5-(3′,7′-

dimethyloctyloxy)-1,4-phenylenevinylene]

• F8T2 : Poly(9,9-dioctylfluorene-co-

bithiophene

• PFDTBT : Poly{[2,7-(9,9-bis-(2-ethylhexyl)-

fluorene)]-alt-[5,5-(4,7-di-2′-thienyl-2,1,3-

benzothiadiazole)]}

• Commonly used Acceptors (n-type Materials):

• PCBM-60 : Phenyl-C61-butyric acid methyl

ester (3% efficiency)

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•BHJs are used as active layers

•Optical photons absorbed and creates exitons (bound electron-hole pair).

•The negative electrode is Aluminum.

•Indium Tin Oxide(ITO) is the common transparent electrode.

•The substrate is glass.

•Current is generated when the resulting free electrons and holes are

transported through the donor polymer and acceptor fullerene, respectively, to

the electrodes.

Structure of Organic Cells March 17, 2015

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The Structure of a Single-Layer & a Multilayer

Organic Solar Cell

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Organic Solar Cell Application Fields :

Personal mobile phone charger

Small home electronics and mobile electronics

attachment

Power generation

BIPV (Building –integrated photovoltaic) such as

building’s exterior wall, window.

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Manufacturing Process and

Cost :

• OSCs are easily manufactured.

• Molecules are easier to work with

and can be used with thin film

substrates that are 1000 times

thinner than Silicon cells

• This fact reduce the cost

production significantly.

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ENVIRONMENTAL IMPACT

•Less energy consumption in

manufacturing OSC than the Inorganic

solar cells.

•An extensive use of OSC contribute to

the increased use of solar power

globally and make renewable energy

sources friendlier.

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DISADVANTAGES:

•Low efficiency (5% compared to

15% of silicon cells)

•Short lifetime.

•Commercially not available

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REFERENCES

[1] Askari Mohammad Bagher“Introduction to Organic Solar

Cells”, Department of Physics, Azad University, North branch,

Tehran, Iran, www.sciepub.com

[2] Liming Liu, Guangyong Li“Modeling and Simulation of

Organic cell”, Nanotechnology Materials and Devices

Conference (NMDC) 2010 IEEE.

DOI: 10.1109/NMDC.2010.5649633, Publication Year :

2010,Pages: 334-338

[3] Chakaroun, M, Ratier,B, Milton, A“Surface modeling of

Organic cells”, Advances in computational tools for

enggineering applications, 2009, ACTEA 2009,

DOI: 10.1109/ACTEA.2009.5227913, Publication Year:2009,

Pages:427-431.

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