This presentation is done by the team Challengers from Al Wakra Independent Secoondary School for boys. This project is based on the topic Dye- Sensitised Solar Cells where the students fabricate an artificial photosynthetic device using nanotechnology and plant pigments to capture sun energy and convert it to electricity. They study the concept of using dyes to plant dyes to capture the solar energy to simulate the natural process “photosynthesis”. They use the workshop-gained knowledge in DSSC to invent new products. They are challenged to create the most efficient dye-sensitized solar cell, using vegetable and fruit dyes, in order to power an electric device. Their product is a Rescue Fan , a fan powered by the DSSC's , which is mainly focused to prevent excessive temperature in pastures thereby protecting animals from harm.

1. I AM DISCOVERING MATERIALS
DSSC
RESCUEFAN
TEAM NAME:CHALLENGER
AL-Bairaq
STUDENT NAME:-
-AHMED MOUSA -MOHAMED BOHINDI
-MOHAMMEDAL-OBAIDLI -ABDULRHMAN

2. INTRODUCTION
 Dye-sensitized solar cells (DSSCs) use an
organic dye to absorb incoming sunlight to
produce excited electrons and create an
energy which is then transferred to an
inexpensive material .

3. ACTIVITY 1: INVESTIGATING THE
PHOTOSYNTHESIS OF PLANT DISKS.
ACTIVITY 2: SEPARATING LEAF PIGMENTS
USING PAPER CHROMATOGRAPHY.
ACTIVITY 3: MEASURING A SOLAR CELL’S
PERFORMANCE.
ACTIVITY 4: MAKING A DYE-SENSITIZED
SOLAR CELL .
ACTIVITIES :-

4. 1
OBJECTIVE : measure the rise in
plant leaf disks immersed in
bicarbonate solution as direct
evidence of the light-dependent
reactions accompanied by the
evolution of oxygen gas.

5. STEPS
1. place 10 disks into a clear plastic cup , add the bicarbonate
solution to a depth of half of three quarters of the cup
2. Turn on lamp , start your stop watch
3. Record the number of disks that float to the top every
minute
0
5
10
15
20
1 2 3 4 5 6 7 8 9 10
without color
filter
with color
filter
RESULT

6.  Conclusion :-The disks without color
filter are much floating in disks
because it is pass all of the colors light
but, the disks with color filter are not
pass except the the filter color light .

7. Activity 2: Separating Leaf Pigments Using
Paper Chromatography

we use paper chromatography to separate the
mixture of pigments in plant leaves and learn
about the different portions of the solar
spectrum they absorb.They also examine the
chemical structures of the pigments and make
predictions about the rate of separation for the
given solvent.
STEP 1 STEP 2 STEP 3 STEP 4

8. RESULT :-
Pigment
Distance
traveled
by
compound
Color
chlorophyl
l a
4cm
emerald
green
chlorophyl
l b
3.4cm olive green
carotene 4.7cm yellow
xanthophy
ll
4.3cm
lemon
yellow
CAROTENE
XANTHOPHYLL

9. Activity 3: Measuring a Solar
Cell’s Performance
 use the solar cell to explore the idea of
matching internal resistance to achieve the
best power transfer from the solar cell to a
light bulb.

10. WE WILL MEASURE THE SOLAR CELL
PERFORMANCE AFTER WE SHED LIGHT
UPON .
CURRENT VOLT
SOLAR CELL 4A 12V
• RESULT

11. Activity 4: Making a Dye-
Sensitized Solar Cell
use vegetable or fruit pigments to fabricate
artificial photosynthetic solar cells for capturing
light energy and convert it to electricity.They
also measure and compare the output current
and voltage characteristics of their dye-
sensitized solar cells made with two different
dyes.

12. STEPS :-
 CLEAN BOTH 1” SQUARE GLASS
 IDENTIFYWHICH SIDE IS CONDUCTIVE BY USINGA MULTIMETER
 PUTTITANIUM DIOXIDE FILM ONTHE CONDUCTING SLIDE
 PUTAVERY SMALLAMOUNT OF BLACKBERRY PIGMENT
 LETTINGYOURTITANIUM DIOXIDE FILM SOAK IN BLACKBERRY
 MARKTHE CONDUCTIVE SIDE BY MARKER
 YOUR PICE OF GLASS SLIDE SHOULD HAVE SOAKED INTHE
BLACKBERRY PIGMENT
 ONCEYOUR CELL IS CLIPPEDTOGETHER
 PUT ONETOTWO DROPS OFTHE IODIDE ELECTROLYTE
SOLUTIONATTHE POINTWHERETHETWO SLIDES MEET
 PUT ONETOTWO DROPS OFTHE IODIDE ELECTROLYTE
SOLUTIONATTHE POINTWHERETHETWO SLIDES MEET .

13. Result :-
The SOLAR CELL IS COMPLETE NOW

14.  As we see there is difference between the
pigment that we and the other groups use , as
a result the blackberry pigment is the most
efficiency to make the solar cell and the other
pigment comes less efficiency after
blackberry pigment .

15. (RESCUE FAN)
Introduction :
Because, the suffering of the ArabianGulf from high summer temperatures,
especially heat of the sun stingingThis has a very detrimental effect on the
animals, especially in pastures and adopt the subject of the high heat of the
sun in the Qatari pasture project propeller-saving sponsor to prevent the
heat of the sun gross and deterring which most likely kills many animals
grazing in the country, a third of this topic is possible to reduce the death
rates of animals in pastures in not long and also prevent the heat of the sun
to control the environmental air inside these country pastures.
• The reason for our insisting on this project, because it is very beneficial to
the environment and country pastures and distinctive benefits.
• this project that it is the new ideas that have been working on it very hard
to reach for this project , and the new in it that no one thought to use the
fan in this way.
• this project has a very useful impact on the weather conditions (high
temperatures) and this is what is missing in our Qatari Society .

16. The strategy used in this project are the physical
strategy , and theTools that we used in the project
are .
Tools :-
-2 Fans
-Wires
-Battery
-LDr
-Solar Cell

17. Aim of the work (Objectives):-
Our project aims to make the Qatari society integrated and ideal
society in the aspect of the atmosphere and reduce the damage
to animals and also heat that are harmful to human beings, and
our group is aimed at making the state of Qatar in the first
developed countries and countries that produce and educates
generations mentor for scientific research, but Our primary goal is
to make the Qatari society in complete satisfaction .

18. Rescue Fan
Hypothesis:
The presence of a fan that works when the hot sun
brightness automatically is a provider of time , effort and
energy.

19. Rescue Fan
Methods :-
We use Experimental method in our project , Example like
to make the Light or theThermal energy to Electric
energy without consuming Energy by Solar Cell’s and
LDr.

20. Rescue Fan
Results:
 the hypothesis Has been confirmed , and the tests confirmed that
this project , save time , effort and energy and thus can circulate the
project to a large number of institutions, factories, companies and
stores to the departments of electrical work automatically when the
presence or absence of light without the need to provide the human
element and for the project
 also there is a benefit that also there are other many benefits
represented in reducing injury animals in pastures certain diseases
caused by high temperature, which also confirmed the piece to
reduce the chances of transmission between animals and birds and
the human, such as H1N1 and H5N1 among humans .

21. Recommendation
I wish our project take place in Qatar society
and to reach GCC and Arab countries

22. Conclusions
 our project summarize in two main points :
1. Make the Qatari society in the comfort of
full and reduce the problems related to the
warm atmosphere
2. minimize the dangers and protect animals
in the pastures of the high temperatures with
warm atmosphere

23. Acknowledgment
Many thanks to my teachers, school and AL-Bairaq team
from Center forAdvanced Materials (CAM), Qatar University
for supporting us during our journey with a AL-Bairaq.
Also, I would like to thank the sponsors UNESCO, Qatar
National Commission, Ras Gas, Maersk and Shell.