Solar Paint

Presented by-

DEEPAK SHARMA ROLL NO. 1213321071

1

DEPARTMENT OF ELECTRICAL AND ELECTRONICS ENGINERING

NIET,GREATER NOIDA

Topics to be covered Introduction Quantum dots Solar paint Graphs Photo electrochemical

performance Comparison Applications Challenges Conclusion

2

Introduction Urgent need for new ways of generating electricity

Development of new technology

Low cost solar energy

Paint coatings or Flexible plastic sheets (PET)

Applied to building, vehicle and appliances

3

Quantum dots Semiconductor whose excitons are confined in all three spatial

dimensions

Typically have dimensions measured in nanometers

Boosts the energy conversion efficiency

Types of quantum dot solar cells

a. ETA(Extremely thin absorber) cells

b. Sensitizers4

Continued….

a) Can be linked together as molecules

b) Lattices

c) Attached to a polymer backbone

d) Incorporated into a polymer thin film 5

How to prepare solar paint

Consists of Cds, CdSe and TiO2 particles

There are two methods

a. Physical mixing of TiO2 and CdS in a mixed solvent

b. Pseudo-SILAR(Sequential Ionic Layer Adsorption and Reaction) method

6

A) Tert-butanol and water as solvent

B) CdS powder and TiO2 powder are slowly mixed into the solvent

C,D) CdS deposited on TiO2 after pseudo-SILAR process

E) Application of solar paint

F,H) Annealed films of solar paint

7

Graphs

8

Photo electrochemical performanceelectrode ratio method Jsc (mA/cm2) Voc (mV) η (%)

CdS/TiO2 1.5:1.0 Mix 2.26 600 0.71

CdS/ZnO 2.25:1.0 Mix 3.01 675 0.57

CdS/ZnO/TiO2 2.0:1.0:0.2 Mix 3.63 685 0.89

CdS/TiO2 1.0:3.5 SILAR 2.33 615 0.87

CdSe/TiO2 1.0:5.0 SILAR 2.12 608 0.83

CdS–TiO2/

CdSe–TiO2

1.0:1.5 SILAR, mix 3.1 585 1.08

9

Comparison

Conventional solar cell Not flexible and heavy

Can not respond at low light levels

Provides power comparatively at higher cost

Cell made from solar paint Flexible and very thin

Can even respond at low light levels

Provides power at low cost

10

Challenges

Improving the light to energy conversion rate

Applying paint directly on to the roofs of the building

Work still needs to be done to improve the conducting material

11

Future Applications

Any cloth coated with paint could power a cell phone or other wireless devices.

Any vehicle coated with paint could convert energy into electricity to continually recharge the battery.

Industries can generate their own power just by coating paint on the building surface.

12

Conclusion

The paint can be made cheaply and in large quantities. If the efficiency is improved somewhat it will make a real difference in

meeting energy needs in future

13

14