Influence of films thickness and structure on the photo-response of ZnO films

Production and characterization of TeI x (x: 2, 4) thin films: Optical, structural properties and effect of porosity

“…This result is consistent with the existing literature [11]. Optic band gap energy (Eg) was determined from the absorption spectra of the films using the following relation [12][13][14]:…”

“…Other researchers found that grain size was inversely correlated with optical band gap. Quantum size affected optic band gap [11][12][13][14][15]. They also noted that film thickness and grain size affected optic band gap as well.…”

Fabrication and characterization of NiO thin films prepared by SILAR method

“…The grain size, dislocation density of the films were calculated using the FWHM for (2 0 0) peak. Additionally, to have more information on the amount of defects in the films, the dislocation density (d) was calculated by using the formula below [23,24],…”

“…4 and Table 3, the band gap values decreased from 3.71 to 3.67 eV with increasing film thickness. The decrease in band gap with increasing film thickness can be attributed to the improvement in the crystals, in morphological changes of the films, in changes of atomic distances and grain size and structural defects in the films [23,28,29].…”

Nanoyapılı CuO İnce Filmlerin Bant Aralığının PEG Yüzey Aktif Maddesi Kullanılarak Kontrol Edilmesi

“…Moreover, as can be clearly seen from the Table 1and Figure 3, the band gap values of the CuO thin films decreased from 1.42 to 1.30 eV with increasing the film thickness. The decrease in the band gap value with increasing the film thickness can be ascribed to the morphological alteration of the films, improvement in crystallization and changes in interatomic distances of the films (Ateş et al, 2007, Akaltun et al, 2011, Yıldırım et al, 2010, Akaltun et al, 2015. The refractive index of the thin films was determined according to the Moss relation (Hannachi et al, 2009) which is directly associated with the fundamental energy band gap,…”