Done by nucleus group at Al wakra independent secondary school for boys under supervision from Al-bairaq

1. AL-BAIRAQ
I AM DISCOVERING MATERIALS
DYE-SENSITIZED SOLAR CELL ( DSSC )
Done by :
Abdulrhman alyafei Rashid almuftah
fahad alkhater Adel elkattan

2. INVESTIGATINGPHOTOSYNTHESIS OF PLANT DISKS.
SEPARATING LEAFPIGMENT USING PAPER
CHROMATOGRAPHY.
MEASURING A SOLAR CELL’SPERFORMANCE.
MAKING A DYE-SENSITIZEDSOLAR CELL.
USINGDSSC AS AN ENERGYSOURCE TO TURN ON
THE FANS IN THE BUSSTATIONS TO COOL THE CHAMBER

3. -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
-photosynthesis is the process by which
plants absorb energy from sunlight and
use it to convert carbon dioxide and
water to glucose and oxygen.

4. Objective : to observe the photosynthesis in plant disks that were put in different lights (white
and indigo).
step 1 : we obtained 200ml solution of sodium bicarbonate in 2 beakers (200ml each).
Step 2 : we Cut 24 leaf disks
Step 3 :we Put the leaf disks with the sodium bicarbonate solution in a syringe to infiltrate.
Step 4 :we placed the disks in the beakers.
Step 5 :we put a light source on the beakers and started the stopwatch
Step 6 : we waited 20 mins to see the result of how many leaf disks are floating.
Procedure:

5. indigo filterWhite lightTime (min)
035
0810
01215
01220

6. Step 1: we cut a strip of chromatography paper to a size of 19cm by 1.8cm then we drew a base line
3cm from the bottom then we clipped the corners off.
Step 2: we placed a green leaf on the base line and rolled a coin horizontally to allow pigments to
move from the leaf to the paper
Step 3: we placed the test tube in a 250ml flask then added approximately 2cm of solvent to the
bottom .
Step 4: we took the piece of paper to the inside of the stopper and gently lowered the paper into the
test tube containing the solvent . The solvent began to move up the paper along with the pigments.
Step 5: when the solvent line is about 1 cm from the top of the paper , we removed the paper and
marked the farthest point of the solvents progress.
Procedure:
Objective:

7. We learned that polarity differs how high a
pigment goes on the chromatography paper , in
our activity we used petroleum ether (polar) so
the non polar pigments travelled higher
(Chlorophyll A ) and the pigments with lower
polarity stayed at the bottom (Chlorophyll B)
Result:
Chlorophyll (A) travelled
high in the chromatography
paper while Chlorophyll(B)
stayed low , and that is
because of the polarity.

8. placed the solar cell under a light
source
connected the ammeter part of the
multimeter to the electrodes of the solar cell.
connected two input ends of the
voltmeter to the electrodes of the solar cell.
Explore the electrical properties of the silicon solar
cells that are readily available in the market .

9. Brightness
rank
Resistance (
Ω )
Current( I
)
Voltage( V
)
Bulbno.
34.2 Ω0.31.251
29 Ω0.252.252
113 Ω0.11.33
V
R
I

10. Tomakeafullyfunctioningdyesensitizedsolarcellandmeasureitsvoltage.
we obtained 2 glass slid and a multimeter.
we obtained carbon by candle smug.
we kept the other material on a glass slide
then we put the slide on the high Temperature at 45c
we put themon means Of dye solution.
we clamped two binder clips to where the slides overlap to hold the
cell together.

11. Pigments Volt (V)
Plant leaves dye 0.39 V
We learned that Dye-Sensitized Solar Cells ( DSSC ) can
be used to generate electricity .
The amount of electricity depends on
the type of pigment and its ability of light absorption.

12. AT BUS STATIONS, WE HAVE NOTICED THAT WAITING
CHAMBERS ARE IN OPEN AIR AND THIS MAKES THE
WAITING PEOPLE SUFFER FROM HIGH TEMPERATURE
ESPECIALLY DURING SUMMER SO WE THOUGHT THAT WE
CAN USE THE DSSC FOR STARTING AN AIR FLOW SYSTEM
IN CLOSED CHAMBERS.
THE DSSC WOULD BE USED TO START A FAN WITH
COOLING SYSTEM TO BLOW AIR INTO THE BUS WAITING
CHAMBERS ,THEN THE COLD AIR SUCKED BY EXHAUST
FAN AND PASSED TO FILTER THE AIR THEN RETURNED TO
THE COOLING CHAMBER FOR FURTHER COOLING ALSO
WE PUT SOME DYE-SENSITIZED SOLAR CELLS ON TOP OF
THE BUSES TO PRODUCE ELECTRICITY WHILE MOVING IN
THE SUN , TO POWER THE SCREENS AND THE LIGHTS OF

14. AlwakraIndependentschoolforboys
ManythankstoourteachersandAL-Bairaqteamfrom
CenterforAdvancedMaterials(CAM),QatarUniversityfor
supportingusduringourjourneywithaAL-Bairaq.
Also,IwouldliketothankthesponsorsUNESCO,RasGas,
MaerskOilandShell.