Development of nano-structured Transparent Contacts for Dye-Sensitized solar cells.

1. Under the supervision
Mohammad Ismail Hossain
Assistant professor, Faculty of Engineering
American International University - Bangladesh
Progress defense
on
“Development of nano-structured transparent contacts for dye sensitized
solar cells.
Group #61
Name of the group members ID numbers
ISLAM, RAKIBUL 13-23758-1
PALASH, FAZLUL KARIM 13-23775-1
SHAMSUDDIN, MD 13-23833-1
SARKER, CHINMOY 13-23797-1

2. Contents
Introduction
Dye sensitized solar cells
Goals and Potential Benefits of the Project
Model/Experimental Design (Block Diagram)
Experimental/Simulation Results so far
Project Timeline (Gantt Chart)
References

3. Introduction
Photovoltaics is the direct conversion of light into electricity at the atomic level.
Some materials exhibit a property known as the photoelectric effect that causes
them to absorb photons of light and release electrons. When these free electrons
are captured, an electric current results that can be used as electricity

4. Dye sensitized solar cells
A dye sensitized solar cell is a low cost solar cell belonging to the group of
thin film solar cells. It is based on a semiconductor formed between a photo
sensitized anode and an electrolyte a photo electrochemical system.
For more than 16 years it has been under extensive research. It specially
attractive for Building Integrated Photovoltaic (BIPV).
DSSC is third generation solar cells which is based on Nano PV
technology.
The DSSC is made up of five components
 Conductive mechanical support
 Semiconductor film
 Sensitizer
 Redox couple electrolyte and
 Counter electrode

5. Dye sensitized solar cells structure

6. Basic differences between DSSCs and
crystalline Silicon solar cells
The very basic differences are
 Available in thin wafer sheets
 More flexible and easier to handle
 Less susceptible to damage than their silicon rivals
 Low light conduction
 Most important low cost

7. Goals and Potential Benefits
Goals Potential Benefits
• The main goal of this thesis is to
analysis the photon absorption
characteristics of Dye sensitized thin-
film solar cell.
• In addition, we will try to enhance the
quantum efficiency (QE), short-circuit
current (Jsc), and open circuit-voltage
(Voc) of the Dye sensitized solar cell
that contributes to calculate the overall
cell efficiency.
• Low manufacturing cost (cost is 1/3 to
1/5 of the silicon based solar cell),
high energy conversion efficiency,
high thermal stability, utilizes the
advantage of the wide band gap semi-
conductor can operate in harsh
environment.
• Higher photon absorption power in
shorter wavelength and very lower in
longer wave length.

8. Block Diagram

9. Basic model overview
Glass
FTCO
P-type layer
I-type layer
N-type layer
BTCO
Metal

10. Designingofamorphoussiliconstepbystep
“Analysis / Simulation process”

11. “
”
Analysis / Simulation process cont...”
Designingofamorphoussiliconstepbystep

12. “
”
Analysis / Simulation process cont...”
Designingofamorphoussiliconstepbystep

13. “
”
Analysis / Simulation process cont...”
Designingofamorphoussiliconstepbystep

14. “Analysis / Simulation process cont...”
Designingofamorphoussiliconstepbystep

15. “Analysis / Simulation process cont...”
Designingofamorphoussiliconstepbystep

16. “Analysis / Simulation process cont...”
Designingofamorphoussiliconstepbystep

17. “Analysis / Simulation process cont...”
Designingofamorphoussiliconstepbystep

18. Required formulas
Open circuit voltage, VOC =
𝑘𝑇
𝑞
ln(
𝐼𝑠𝑐
𝐼𝑜
+ 1)
Short circuit current, Jsc = 𝐼𝑝ℎ − 𝐼𝑜 𝑒
𝑞𝐼𝑠𝑐 𝑅𝑠
𝑘𝑇 − 1 −
𝐼𝑠𝑐 𝑅𝑠
𝑅𝑝
Fill factor, FF=
𝑉𝑚 𝐼𝑚
𝑉𝑜𝑐 𝐽𝑠𝑐
Overall power conversion efficiency, η = FF
𝑉𝑜𝑐 𝐽𝑠𝑐
𝑃𝑖𝑛𝑐

19. What remain
 A TCO Surface will be added.
 Back Reflector or Metal will be added at the bottom of the solar cell.
 Glass will be used instead of Air
 Simulation Results will be regenerated after Making above changes.

20. Thesis Timeline (Gantt chart)
TASK August
17
August
29
August 30-
October 25
November
5-30
December
1
December
9-14
December
27
Progress report
Submission
Progress Defense
Forecasting, Further
Analysis and Case
Study
Thesis Book
Writing
Thesis Book
Submission
Modification
Final Defense

21. References
 [1] Wen Yang, Peizhi Yang, Qunwei Tang, “Double-layered TiO2 anodes from
nanorods and nanoparticles for dye-sensitized solar cells ”, Materials Letters
180(2016) 228-.230
 [2]. I.N.Obotowo, I.B.Obot, U.J.Ekpe, “Organic sensitizers for dye-sensitized
solar cell (DSSC): Properties from computation, progress and future
perspectives”, Journal of Molecular Structure 1122 (2016) 80-87.
 [3].Lixin Song, Yingli Guan, Pingfan Du, Yenfeng Yang, Frank Ko, Jie Xiong,
“Enhanced efficiency in flexible dye-sensitized solar cells by a novel bilayer
photoanode made of carbon nanotubes incorporated TiO2 nanorods and
branched TiO2 nanotubes ”, Solar Energy Materials & Solar Cells 147(2016)
134-143.

23. Thank you very much
Group #61