Structural and optical properties of nanocrystalline aluminum phthalocyanine chloride thin films

Influence of annealing temperature on structural and optical properties of nanocrystalline Platinum octaethylporphyrin (PtOEP) thin films

“…0 for the as-deposited and annealed films are given in Table 3. The results are in the normal v (3) range was reported for several organic semiconductors thin films [4,5,11,60]. The Nonlinear refractive index which is related to non-linear susceptibility and linear refractive index will be given by the following relation [55,59]: 13 shows n 2 vs. hm for the as-deposited and annealed films.…”

Characterization and photovoltaic performance of organic device based on AlPcCl/p-Si heterojunction

“…Values of m, are calculated from the slopes of the straight lines in the figure and were found to be greater than 2 indicating that the space charge limited current (SCLC) controlled by the distribution of trap level is the operating mechanism in this region. The current in SCLC mechanism is given by [22]: where e is the electronic charge, m is the mobility, N y is the density of states in valence band, e o is the permittivity of free space, e is permittivity of the organic film which equals 3.53 [23],P o is the trap density per unit energy range at the valence band edge, d is the thickness of organic film, and l = m À 1 represents the ratio between (T t =T), where T t represents the temperature parameter describing the exponential trapping distribution and T is the room temperature. Values of l and T t were calculated at temperature 308 K as 1.36 and 418.8 K, respectively.…”

Optical and Electrical Properties of TTF-MPcs (M = Cu, Zn) Interfaces for Optoelectronic Applications

“…Table 1 shows selected signals corresponding to the synthesized powders and the thin film deposited onto a silicon substrate [19,20,21,22]: it was intended that the band assigned to the stretching vibration for the pyrrole be around 1065 cm −1 , the bands responsible of the isoindole plane and carbon-nitrogen stretching occur around 1288 and 761 cm −1 , respectively, the band around 1164 cm −1 be the result of the isoindole deformation and C-H out of plane bending of aromatic compounds at 620 cm −1 [20,21]. Additionally, the IR absorption technique was used to identify the phase nature of the MPc powder and thin film, as the IR spectrum is markedly dependent on chemical composition and crystalline form [21]. MPcs are known to have different polyforms, which can be identified by the IR absorption technique [23,24].…”