Polycrystalline TiO<SUB>2</SUB> Thin Films with Different Thicknesses Deposited on Unheated Substrates Using RF Magnetron Sputtering

Abstract

Different film thicknesses of polycrystalline TiO 2 thin films deposited on various unheated substrates using radio frequency (RF) magnetron sputtering is investigated. The crystalline structure, optical properties, and surface morphology and roughness were measured using an X-ray diffractometer (XRD), a field-emission scanning electron microscope (FESEM), an atomic force microscope (AFM), and a UV-Vis spectrophotometer. Polycrystalline phases were formed on unheated substrates due to the plasma particle bombardment. Crystalline structures more easily formed on the glass substrate and only nanocrystalline structures formed on the ITO glass substrate due to the surface roughness of substrates. The absorption edge and optical band gap depended on the crystalline particle size and phase structure. The XRD results indicate that 500-nm-thick film on a glass substrate had the strongest intensities of mixed anatase and rutile phases.

Synthesis and characterization of MAPbI3 thin film and its application in C-Si/perovskite tandem solar cell

“…A comparison between the conversion efficiency of the present study and the efficiency of previous studies based on different parameters is shown in Table 2. The tandem device prepared in this study recorded less efficiency compared to the references [35,36,51], this attributed to several reasons, including the large active area and the use of an inverted structure to prepare the device. In addition, the reason for the emergence of pinholes in the perovskite film led to a decrease in the performance of the device.…”

OPTICAL AND ELECTRICAL PROPERTIES OF Mn2+ DOPED TITANIUM OXIDE THIN FILMS

“…The intensity of band correlates with the variation in color due to the formation of single and double charged oxygen vacancies, which is observed in the orange and yellow region. [69][70][71][72][73][74][75] Fig.-5 shows the color coordinates of Mn 2+ doped TiO2 thin films, which is measured from the CIE 1931 chromaticity, and the (x, y) color coordinate was found to be at (x = 0.5432, y = 0.3397). The location of the color coordinates from the CIE chromaticity diagram is found in orange and yellow regions.…”

γ-Radiation “Aging” of Thin Film TiO2

“…Although changes to the bandgap are seen, the relative change is fairly insignifi cant, ranging from 3.85 eV at the lowest and peaking at 3.99 eV. Titania exists naturally as three crystalline polymorphs known as rutile, anatase, and brookite (Wei & Chang 2011). XRD data confi rms through the characteristic peaks in (Fig.…”