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organic solar cell

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hanaa almaghamsi

on 12 April 2013

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Transcript of organic solar cell

(S1) TiCl4 H2O By
Hanaa Omar Al-Maghamsi MATERIALS AND EXPERIMENTAL Results and Discussion Motevation Energy challenge . Replace of fossil fuels . Increasing populat . Developing countries Photovoltaics Positioning Inorganic: . Commerically available . High energy consumption for fabrication . Materials: toxic and low availability in nature (Cd,Te,..) . Efficencies: long way behind
" Organics" Working Principle Substrate pretreatment
(etching SiO2 layer)

Recipe: H2O / HF(49%)
Removes: Oxide (SiO2)
HF reacts with SiO2 to make liquid
products. Wet Etching Function . Carrier for the monolayers of the
sensitizer using their high
surface area.

. Medium of electron transfer to the
conducting substrate

TiO2 , ZnO , SnO2 ,Nb2O5 ---- Nanoporous Semiconductor film Why TiO2? Abundance in market and nature

physical stability


Nontoxicity How TiO2 ? Ti(OH)4 Ti(OH)4
GEL NH4OH Stirring (PH = 7) Filtered & washed H2O2
(S2) Preparation of nanopoures titanium dioxide
Sol-gel method Dye Sensitizer Choosing the suitable dye The used dye was prepared in chemistry
department at King Khalid University
Called the 2-{4-[2-(3-methylthiophen-2-ylmethylene)hydrazino] phenyl}ethylene-
1,1,2-tricarbonitrile dye (MYHPET) How Dye? The dye thin films were deposited by use of conventional thermal evaporation system. Deposition of top metal electrode Gold is used as a top metal electrode Size and shape of the electrode can be controlled by using a suitable mask TiO2 Film Characterization Optical Constant
by used
Ellepsometry Parameters
Physical structure XRD (Phase
and Structure) SEM (Surface
morphology) S1 S2 Amplitude ratio Phase difference Dye Film Characterization Physical structure
used XRD Optical Constant Ellepsometry Parameters Solar Cell Characterization I-V curves as a function of incidence power of illumination The overall device performance parameters I-V curves as a function of temperature S3 refractive index ,
extinction coefficient Energy gab Amplitude ratio Phase difference refractive index ,
extinction coefficient Absorption coefficient,
Energy gap HNO3+H2O2(S3) CONCLUSIONS 1- we have demonstrated an enhanced performance of a heterojunction organic/inorganic solar cell utilized a nanoporous TiO2 film.

2- That the Si substrate can be replaced by a suitable flexible substrate for building device with large varieties of shapes and sizes with low-cost and environmentally-friendly materials. SOLAR CELL CHARACTRIZATION DYE FILM CHARACTERIZATION TiO2 FILM CHARACTRIZATION (?) Organic solar cell . Inexpensive
. Apply simple production techniques.
.Thin, lightweight, flexible Edwards E306A vacuum evaporator unit. History of Solar Cell stirring
(30 min) Supervised By
Prof. Ahmad A. AlGamdi
Dr. El Said Shalaan High Efficiency Dye Sensitized/Metal-nanoparticle Composite Solar Cell
Full transcript