Print ISSN: 1681-6900

Online ISSN: 2412-0758

Keywords : Solvents


Effect of Different Solvents on Performance Polymer: Fullerene: Gold Nanoparticles Organic Solar Cell

Abdullah Abbas Hussein; Waleed Ali. Hussain; Hussein Falih Hussein

Engineering and Technology Journal, 2015, Volume 33, Issue 9, Pages 1571-1581

Gold nanoparticles (AuNPs) deposited at the interface of the intermediate layer [poly (3,4ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS)] and poly(3-hexylthiophene):[6,6]-phenylC61-butyricacidmethylester (P3HT:PCBM) active layer were found to significantly increase organic solar cell performance. Organic solar cell devices with different solvents, such as the chlorobenzene (CB), dichlorobenzene (DCB), chloroform (CF), and co-solvent Chlorobenzene: Dichlorobenzene (CB:DCB), Chlorobenzene:Chloroform (CB:CF), and Dichlorobenzene:Chloroform (DCB:CF) were fabricated. The photo-physical properties of these devices with different solvents are investigated. It can be found that, absorption spectrum of the blend becomes broad with different solvents, which is highly desirable for an organic solar cell devices. Film morphology is evaluated by Atomic Force Microscopy (AFM). XRD patterns and External Quantum Efficiency (EQE) measurements are also performed for the devices. The efficiency enhancement for the device with (CB:CF) is more significant than for other solvents. With different solvents, the solar cells upon (CB:CF) give Power Conversion Efficiency (PCE) of 3.6%, in contrast to 3.2% for (CB), 2.06% for (DCB), 3% for (CF), 2.55% for (CB:DCB), and 2.9% (DCB:CF) devices.

Preparation CuO and CuCO3Cu (OH) 2 Crystal Nano Particles by Using Microemulsion Method

Sabiha Jabbar Beden; Hassan Ismail Dumbous; Kassim Mohammed Sahan

Engineering and Technology Journal, 2012, Volume 30, Issue 4, Pages 546-555

A microemulsion method for preparing colloidal copper nanoparticles in
microemulsion is reported. The obtained copper carbonate CuCO3⋅Cu(OH)2 nanoparticle
and copper oxide CuO nanoparticle were characterized by powder X-ray diffraction
(XRD), atomic force microscopy(AFM),transmission electron microscopy (TEM) and Xray
fluorescent(XRF) analysis, the purity of material and average particle size about 10
nanometer.. A microemulsion is thermodynamically stable ,optically isotropic derision
of two immiscible liquids consisting of nano-size (CuSO4.5H2O) domains of one or
both liquids in the other (white oil),stabilized by an interfacial film of the surface-active
molecules. The materials mixed to have new immiscible solution , add chemical materials
to reduce surface tension and to reduced interfacial atomic bonds to very low level , the
very fine dispersed spherical micelles in microemulsion are thermodynamically stable
due to a combination of very low interfacial tension very small nanoparticles diameter of
(2-5) nm. Addition another of chemical material as react agent or reduced agent and
precipitate agent to product final material CuCO3⋅Cu(OH)2.Synthesis of monodispersed
CuCO3⋅Cu(OH)2 nanoparticles with refractive index similar to glass plates by using
ultrasonic spray pyrolysis technique by method .Yielding homogeneous ,low defect thin
films of high transparency ,that can be used as color filters for liquid crystal displays .