Abstract
The effect of heat treatment on the optical properties of the bulk heterojunction blend nickel (II) phthalocyanine tetrasulfonic acid tetrasodium salt and Tris (8-hydroxyquinolinato) Aluminum (NiPcTs/Alq3) thin films which prepared by spin coating was described in this study. The films coated on a glass substrate with speed of 1500 rpm for 1.5 min and treated with different annealing temperature (373, 423 and 473) K. The samples characterized using UV-Vis, X ray diffraction and Fourier transform Infrared (FTIR) spectra, XRD patterns indicated the presence of amorphous and polycrystalline blend (NiPcTs/Alq3). The results of UV visible shows that the band gap increase with increasing the annealing temperature up to 373 K and decreases with increase the annealing temperature to (423, 473)K respectively.
Highlights
Organic semiconductors are a portion of materials that gathering between the mechanical and chemical advantages of organic compounds like plastics with the electronic characteristics of semiconducting materials, and that the amendment by chemical synthesis it has the ability to absorb light, conduct electricity, and emit light is united with a material structure for example, to assign electronic properties such as the desired emission wavelength, to allow for mechanically strong or to becomes it soluble, or, lightweight, and flexible thin film
While Fourier-transformed Infrared (FTIR) spectrum for as-deposited and annealed blend (NiTsPc/Alq3) thin films were recorded the spectrum over the range of 400-4000 cm-1 with resolution 4, the spectra obtained at room temperature and recorded in the transmittance mode using Thermo ScientificTM NicoletTM iSTM10 Fourier transform Infrared (FTIR) Spectrometer
The X-Ray diffraction spectra of asdeposited and heat treated BHJ blend (NiPcTs/Alq3) thin films which are prepared by spin coating at room temperature were recorded by X-ray diffraction for 2θ in the range between 0 to 60o as shown Fig. 3
Summary
Organic semiconductors are a portion of materials that gathering between the mechanical and chemical advantages of organic compounds like plastics with the electronic characteristics of semiconducting materials, and that the amendment by chemical synthesis it has the ability to absorb light, conduct electricity, and emit light is united with a material structure for example, to assign electronic properties such as the desired emission wavelength, to allow for mechanically strong or to becomes it soluble, or, lightweight, and flexible thin film. Key words Organic semiconductors, bulk heterojunction blend NiPcTS /Alq3 To examine the optical properties of the as-deposited and heat treated BHJ blend (NiTsPc/Alq3) thin films, Split Beam (internal double beam design) beam Metertech SP -8001UV-Vis NIR spectrophotometer was used in the range (300–800) nm.
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