title: The photovoltaic efficiency of the fabrication of copolymer P3HT:PCBM on different thickness nano-anatase titania as solar cell.
abstract: Organic solar cells based on (3-hexylthiophene):[6,6]-phenyl C61-butyric acid methylester (P3HT:PCBM) bulk heterojunction (BHJ) with an inverted structure have been fabricated using nano-anatase crystalline titanium dioxide (TiO2) as their electron transport layer, which was prepared on the indium tin oxide coated glass (ITO-glass), silicon wafer and glass substrates by sol-gel method at different spin speed by using spin-coating (1000, 2000 and 3,000 rpm) for nano-thin film 58, 75 and 90 nm respectively. The effect of thickness on the surface morphology and optical properties of TiO2 layer were investigated by atomic force microscopy (AFM), X-ray diffraction and UV-visible spectrophotometer. The optical band gap of the films has been found to be in the range 3.63-3.96 eV for allowed direct transition and to be in the range 3.23-3.69 eV for forbidden direct transition to the different TiO2 thickness. The samples were examined to feature current and voltages darkness and light extraction efficiency of the solar cell where they were getting the highest open-circuit voltage, Voc, and power conversion efficiency were 0.66% and 0.39% fabricated with 90 nm respectively.
authors.affiliation: Misan University, College of Basic Education, Department of Science, Misan, Iraq.
authors.forename: Haidar Gazy
authors.initials: HG
authors.lastname: Lazim
authors.affiliation: Basrah University, College of Education for Pure Sciences, Department of Physics, Basrah, Iraq.
authors.forename: Khalid I
authors.initials: KI
authors.lastname: Ajeel
authors.affiliation: Basrah University, College of Education for Pure Sciences, Department of Physics, Basrah, Iraq. Electronic address: badran_hussein@yahoo.com.
authors.forename: Hussain A
authors.initials: HA
authors.lastname: Badran
mesh_terms: D004560:Electricity; D037741:Fullerenes / Q000737:chemistry*; D005898:Glass / Q000737:chemistry; D018625:Microscopy, Atomic Force; D053758:Nanoparticles / Q000737:chemistry*; D012993:Solar Energy; D013052:Spectrometry, X-Ray Emission; D013816:Thermodynamics; D013876:Thiophenes / Q000737:chemistry*; D017971:Tin Compounds; D014025:Titanium / Q000737:chemistry*; D014961:X-Ray Diffraction
chemical_list: C539575:(6,6)-phenyl C61-butyric acid methyl ester; D037741:Fullerenes; D013876:Thiophenes; D017971:Tin Compounds; C507295:poly(3-hexylthiophene); C009495:titanium dioxide; C109984:indium tin oxide; D014025:Titanium
keywords: AFM; Nano-thin film; P3HT:PCBM blend; Solar cells; Sol–gel