Electrical and optical properties of C46H22N8O4KM (M=Co, Fe, Pb) molecular-material thin films prepared by the vacuum thermal evaporation technique.
In this work, the synthesis of new materials formed from metallic phthalocyanines (Pcs) and double potassium salt from 1,8-dihydroxianthraquinone is reported. The newly synthesized materials were characterized by scanning electron microscope (SEM), atomic force microscopy (AFM), infrared (IR) and Ultraviolet-visible (UV-vis) spectroscopy. The powder and thin-film samples of the synthesized materials, deposited by vacuum thermal evaporation, show the same intra-molecular bonds as in the IR spectroscopy studies, which suggests that the thermal evaporation process does not alter these bonds. The effect of temperature on conductivity and electrical conduction mechanism was measured in the thin films (approximately 137 nm thickness). They showed a semiconductor-like behaviour with an optical activation energy arising from indirect transitions of 2.15, 2.13 and 3.6eV for the C(46)H(22)N(8)O(4)KFe, C(46)H(22)N(8)O(4)KPb and C(46)H(22)N(8)O(4)KCo thin films.
Sánchez-Vergara
M E
ME
Mechanical Engineer Department, Instituto Tecnológico y de Estudios Superiores de Monterrey, Campus Ciudad de México, Calle del Puente 222, Col. Ejidos de Huipulco, 14380 México, DF, México. sanchez.mariaelena@gmail.com
Ruiz Farfán
M A
MA
Alvarez
J R
JR
Ponce Pedraza
A
A
Ortiz
A
A
Alvarez Toledano
C
C
D003035:Cobalt / Q000737:chemistry; D004553:Electric Conductivity; D007501:Iron / Q000737:chemistry; D007854:Lead / Q000737:chemistry; D008670:Metals / Q000737:chemistry*; D018625:Microscopy, Atomic Force; D008855:Microscopy, Electron, Scanning; D009942:Organometallic Compounds / Q000737:chemistry*; D013055:Spectrophotometry, Infrared; D013056:Spectrophotometry, Ultraviolet; D013696:Temperature; D014618:Vacuum; D014835:Volatilization
D008670:Metals; D009942:Organometallic Compounds; D007854:Lead; D003035:Cobalt; D007501:Iron