Its all About Solar Cell which is completely Made of Organic Compound and it is most flexible , cheaper and high effeiciency.

1. ORGANIC SOLAR CELL
(PRINTABLE ,FLEXIBLE,ORGANIC SOLAR CELL)
BY SURAJ BHAKTA
EEE 3rdYEAR
SWAMI VIVEKANANDA INSTITUTE OF SCIENCE ANDTECHNOLOGY

2. CONTENT
■ INTRODUCTION
■ HISTORY
■ ABOUT PHOTOVOLTAIC CELL
■ WHY ORGANIC SOLAR CELL
■ DIFFERENTTYPES OF ORGANIC CELLS
■ WORKING PRINCIPLE
■ BASIC PROCESS IN ORGANIC SOLAR CELL
■ BASIC CHARASTERISTICS
■ ORGANIC vs INORGANIC SOLAR CELL
■ APPLICATION
■ ADVANTAGES & DISADVANTAGES
■ FUTURE ASPECT
■ CONCLUSION
■ REFERENCE

3. INTRODUCTION:
 Power generated by normal photovoltaic is correspond to 30% of our Energy demand.
 Organic materials bear the potential to develop a long-term technology that is based
on power generation.
 By 2030,the IEA expects that the renewable energy capacity pass the coal capacity and
become the largest global power supply.
 Organic solar cell is a polymer solar cell that uses organic electronics for light
absorption and charge transport to produce electricity from sunlight by photovoltaic
effect.

4. HISTORY:
 In 1839 EDMOND BECQUEREL Built the
First Photovoltaic Cell.
 In 1883 CHARLES FRiTTS Built the Solid State
Photovoltaic on applying a layer of “Selenium”.
 25th April 1954 “ First Practical photovoltaic Cell was
evidenced at BELL LABROTARIES”.
(https://en.wikipedia.org)
.

5. ABOUT PHOTOVOLTAIC CELL:
 A Photovoltaic cell or Solar cell is a type of Electrical device the
converts the Energy of light directly into Electricity.
 Classical photovoltaic cell mainly based on Inorganic
Material(silicon).
■ Some of its demerits:
1.Silicon is expensive,
2. Not Flexible,
3.Limited availability of inorganic material.

6. Why Organic Solar Cell?
 Ease of Processing ,
 Mechanical Flexibility ,
 Safer Environment ,
 UnlimitedAvailability ,
 Compatibility(thin cells) ,
 Economically Viable.

7. Statement of Problem :
Firstly-
i. Silicon solar cells are very much expensive , heavy weightful ,
ii. These are literally ineffective in the areas which has low temperature,
iii. Also these panels are permeable to temperature fluctuations,
iv. They are not flexible ,so they are not fitted to install any curved surface or curve
rooftops.

8. DifferentTypes Of Solar Cells:
Single Layer
Organic Cells
Bi-Layer Organic
Cells
Bulk
Heterojunction
Organic Cells

9. How Does It Works ?
■ Single Layer Organic cells :

10. How Does it work ?
■ Bi-LayerOrganic Cell :
In a Bi-LayerOrganic cell we have more
two layers :
 1.Donor Layer
 2.Acceptor Layer


11. Working principle of Bi-Layer cell :

12. How Does it work ?
 Bulk Heterojunction Organic Cells :
 Electron acceptor and donor mixed together, forming polymer blend.
 Length of polymer blend is same
as exciton diffusion length.
 Efficiency is improved.
 Heterojunction mainly consists of
conductive polymer and fullerenes.
Fig : Bulk Heterojunction Organic Solar Cell

13. Basic Process in Organic Solar Cell :
■ In general, for a successful organic photovoltaic cell five important processes
have to be optimized to obtain a high conversion efficiency of solar energy
into electrical energy :
1. Absorption of light and generation of excitons ,
2. Diffusion of excitons to an active interface ,
3. Charge separation ,
4. Charge transport ,
5. Charge collection .

14. Basic Charasteristic :
■ As one of the many consequences of this, the power conversion efficiency of organic
solar cells is more than inorganic solar cells.
■ Recently, organic solar cells are attracting a lot of attention due to flexibility.
■ The mobilities of charge carriers are far lower in organic solar cells than in inorganic
solar cells.

15. ORGANIC VS . INORGANIC SOLAR CELL
 ORGANIC INORGANIC
1. Organic material like 1. Inorganic material like ‘ Si ’ is used
‘Pthalocyanine’ is used. to manufacture inorganic solar cell.
2. Light absorbtion leads to the 2. Light absorbtion leads to the formation of Excitons.
formation of free electron-hole pair.
3. Low manufacturing cost and are 3. High manufacturing cost.
very cheap.
4. Medium effeiciency, 4. High effeiciency.
(Continued….)

16. ORGANICVS INORGANIC SOLAR CELL
5. High absorbtion co-effeicient. 5. Low absorbtion coeffeicient than
organic solar cell.
6. Moleculer engineering can change the 6. Inorganic material properties can not
properties of organic material in order to be altered to fit for any application.
fit for the application.
7. Light in weight and Flexible, so 7. Heavy and Rigid
less prone to damage.

17. Applications :
 Research in U.S. (konarka) has shown that
Organic Cells can be used in soldier tents to
generate electricity and supply power to the
other military equipments such as GPS receivers.
 Portable battery chargers ,
 Electric car chargers ,
 Office and residential power ,
 Renewable and portable energy ,
 Satellites .
 BIPV (Building - Integrated Photovoltaic) such as
buildings exterior wall , window .

18. Advantages of Organic Solar Cell :
 It has very good mechanical Flexibility ,
 Low weight and flexibility of the PV modules ,
 OPV has a semi-transparent characteristic ,
 Easy to integrate into other products ,
 Lower manufacturing costs compared to conventional inorganic technologies such as silicon
solar cells ,
 Organic photovoltaic cells can be produced in a continuous process using printing tools ,
 OPV’s have a low environmental impact and short energy payback times .

19. Disadvantages :
 Short life span because sunlight continuously destroy the organic material used ,
 Temperature variations cause degradation and decreased performance over time ,
 Organic solar cell have low efficiency than inorganic solar cells, representing a big
point of weakness at present ,
 Strong columbic force of attraction between excitons is responsible for the
complexity in the generation of free electrons and holes , affecting photocurrent .

20. Future Aspects :
 Development of environment friendly devices ,
 Another possibility would be to combine solar cells,
sensors and electronic circuits on a small strip of plastic to
form a self-sufficient power Microsystems .
 Organic photovoltaic materials that can be made or
processed in liquid form, allowing them to be applied to a
wide array of surfaces ,
 Light weight and flexible organic solar cells can be printed
over cloths .

21. Conclusion :
 Organic cell offer to provide an eco-friendly, large area flexible solar cell
technology at low production cost.
 There is always a trade-off between cost and efficiency , OSC have low efficiency
but are cost effective . So, OSC’s are more economic to use .
 They are the cheaper alternative of inorganic solar cell and in future main focus will
be on increasing its efficiency and operating stability.
 Although it faces the limitations like low efficiency, stability problem etc. but still
It has the potential to be a part of world’s solution to the future of energy.

22. Reference :
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, ACTEA2009,
4 http://en.wikipedia.org/wiki/Organic_solar_cell

23. THANKYOU