1) The document summarizes the activities and design project of a student team exploring dye-sensitized solar cells and their potential applications. 2) The team conducted experiments investigating photosynthesis, chromatography of plant pigments, and measuring performance of solar cells. 3) Their design project was to create a product called "D-SOBATT" using henna-dyed solar cells that could store solar energy and charge batteries. Their tests achieved higher voltages than previous studies.

1. Al-Bairaq
I am Discovering Materials-Cycle7
DYE-SENSITIZED SOLAR CELLS Module
Silver Nano-particles DSSC and
D-SOBATT
ABW_Pearls_7
Razan Tawfiq Alia Al-massih
Shaikha Alsubeay Rouda Alqassmi

2. Outlook
• Introduction
• Activities
1. Activity 1: Investigating the Photosynthesis of
Plant Disks.
2. Activity 2: Chromatography: Varying colours in
leaves.
3. Activity 3: Measuring Solar Cell Performance
and Powering light bulbs with solar cells.
4. Activity 4:Preparing A Dye Sensitized Solar Cell
• Design project : Improving the DSSC efficiency.
• Product idea (Silver Nano-particles DSSC
and D-SOBATT)

3. Dye-Sensitized Solar Cell (DSSC) is a low-cost solar cell
and it’s a friend of the environment . It’s actually
depends on the dye you will use unlike the solar cell
which is cheap less and made of silicone . Therefore, we
are going to use this type of cells in our product which is
called “D-SOBATT.” It is a useful product that can be used
every where to charge and store energy.

4. Aim :
1-To know what are the factors which affect the rate of
photosynthesis process.
Activity (1): Investigating the Photosynthesis of Plant Disks

5. Activity (1): Investigating the Photosynthesis of Plant Disks
0
1
2
3
4
5
6
7
8
9
10 20 30 40 50 60 70 80
No.ofDiscs
Effect of light wave length on Rate
of Photosynthesis
white light
red light
yellow light
Time

6. Activity 2 : Chromatography(Varying colours in leaves )
Aim : The aim of the experiment is to separate the various
photosynthesis pigments from plants leaves.
Chromatography Solvent : 90% petroleum ether + 10% Acetone.

7. Activity 2 : Chromatography(Varying colours in leaves )
one leave contains more than
one pigment.
Name of
pigment
Actual Ranking of
distance traveled
Predicted the
distance value .
Distance
Traveled
Pigment
Color
Chlorophyll b3rd45Yellowish
Green
Chlorophyll a2nd107Bright
Green
Carotene1st1112.5Yellowish
Orange

8. Aim : Measuring solar cell performance by using multimeter.
• The semiconductor solar cell contain two opposite parts
Which are ( n-type- & p-type )
Activity 3: Measuring Solar Cell Performance
Part A: measuring solar cell performance

9. Actual
Brightness
Rank
Predicated
Brightness
Rank
ResistancePowerCurrentVoltage
214.166Ω0.375W0.3A1.25 vA
428.33Ω0.741W0.3 A2.47 vB
339Ω0.56W0.25A2.25 vC
1413Ω0.13W0.1A1.3vD
* Finding the (voltage ,current , power and the resistance) for different bulbs .
Activity 3: Measuring Solar Cell Performance
Part B: Powering light bulbs with solar cells

10. Activity 4: Preparing A Dye Sensitized Solar Cell
Aim: to know how can we use different types of dyes to create a dye-
sensitized solar cell and to measure the output voltage and current of this dye
sensitized solar cell .

11. Activity 4: Preparing A Dye Sensitized Solar Cell
Conclusion : The dye
sensitized solar cell act like
artificial photosynthesis
which the dye absorb the
light and by using
electrolyte and cathode we
can produce an electrical
current. Also, it can give
volt even in shade

12. Design Project
Aim: to see how will the henna as a dye will give as a voltage at the end .

13. Design Project
Aim: to see how will the henna as a dye will give as a voltage at th

14. Design Project

15. Design Product
Our first part of the product is to improve DSSC work more than that
in the paper. They used the Henna in the form of finely cut leaves but
we used as powder. Through this methodology, we got silver nano-
particles which can be used in Henna mixture as dyes for the DSSC.
We are thinking about several experiments, as to use Silver Nitrates in
different concentrations and Henna also in different concentrations.

16. Will our dye that contains silver Nan particles and Henna give a
good voltage? And will D-SOBATT solve the problem of the
energy supply ?
1- To know how will the “Henna” will give a good voltage.
2- To apply and design a helpful product by using DCCS.
3- To create a product with safe electricity in our life to achieve
version 2030.

17. Design product
Henna
Whatman
filter
Conductive
slides with
TiO2
Conductive
slides with
Carbon
AgNO3
1 mM
Solution
20gm Henna
powder+
100ml DW
Boiling
Henna
filtering
AgNO3

18. • We used Henna to form silver Nano-particles by
reduction. Then it is used as a dye in DSSC with
reference to a research paper in 2013. The results
we gained were improved DSSC volt output to be
110mV instead of 44mV.
• We used silver nitrate solution 1 mM Henna boiled
in 100ml and filtered by Whatman filter which
needed to be left untill the next day. Then we took
the henna filtrate and mixed with 50ml of silver
nitrate.

19. • In our project we modified what was in a
previous research(1) that where we had
got high value of voltage compared to
that research’s voltage by using Henna.
Which they got (44mV) and we did two
DSSC and one gave us (83mV) and the
other one gave us (110mV).
• This result can be explained by using
Henna as a powder not complete leaves
as that research used.,
• Our control one which actually gives (
150mV) with the blackberry.
Design Product
0
50
100
150
200
Voltage
Silver Nano-particles
compared to control and
others’ research
control
Previous
research
our
project

20. The main idea of our product is to design a small environmental-
friendly battery which is based on Dye-Sensitized Solar Cells that
will generate high value of voltage which then can be used to
charge different items such as Battery and not allocated on one
type , which mean will help all the people to continue the work
more easier as we know that a lot of work nowadays depends on
these devices and that’s why we are encouraged to make this
device and improve it’s structure that we learnt from the last
Activity with Albairq Team .

21. 1- Our product (D-SOBATT) will help us to use
free clean energy which is solar energy .
2- Store the solar energy in the cells then
make it available in the far away places as
campaigns or when you need it
any time.
3- D-SOBATT will be safety to use .
4- Will act better than solar cell (silicon cell) .

22. •We will use Graphite
as a cathode & TiO2 as
an anode.
•Electrolyte : KI
•Dye : Henna and silver
Nitrates
Its actually will use as a charger for a
battery when any thing turn off .
Thus, this product can help you even
thought its need to work more on it
to make the product more
professional . As a result we need at
least 15 DCCS that have 0.1 V to
charge a battery with 1.5V .

23. Most of the stories have ends but our story or experience doesn’t has an
end it will be continual and permanent . From this participation we
learned how to think probably with a wide mind how will things will
come at the end . We gave rustles and showed many conclusion which
really help us to improve our self in a short time and from all of this we
created this product which means a lot for us . Moreover, we stayed like
2-3 days just thinking about an idea for a perfect product and we won’t lie
we changed our idea many times and that’s really disappointed us a lot
but we are here with this idea and we have a lot of hope in it .

24. 1- In the project idea , while we used Henna we
recommend that it must be a strong one to give more
voltages .
2- The structure of the product need a little to be more
realistic and more practical .
3- We hope that our product will be safe to the
environment.
4- This is the most one we really hope that’s this product
in the future can charge not just a buttery as we did but
also the devices like mobile phone .

25. D-SOBATT will help everyone and will save the earth
and that’s if people will be cooperate in the future.

26. We have a lot of hope in our product and that will improve more
and help us during our lifestyle .Moreover ,from this participation
we learned a lot of new and precious information that we have to
improve and work on them . It was like a big prize for us during
our adolescence time .To sum up, we believes that our participate
at this competition will means a lot of things for all of us .

27. Resources
1- Albairaq Workshops at our School’s lab and at Qatar
University .
3-Recent Researches:
Advanced Materials Research Vol. 678 (2013) pp 349-360
Online available since 2013/Mar/25 at www.scientific.net
© (2013) Trans Tech Publications, Switzerland
doi:10.4028/www.scientific.net/AMR.678.349
School : Amna Bint Wahb
Secondary School For Girls

28. Acknowledgment
The ABW Pearl team would like to thank (UNESCO,
RasGas, Shell and Qatar Petroleum ) for this precious
chance that they gave us to improve our problem-Solving
skills. Also , we would like to thank Al-Bairaq team, CAM
, Qatar University and our school for the great help they
provided throughout the project period.