Electrical, structural and gas sensing properties of zinc phthalocyanine thin films

Collins, R. A.; Mohammed, K.A.

doi:10.1016/0040-6090(86)90260-9

Cited by 46 publications

(20 citation statements)

References 22 publications

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“…34 A study by Nyokong and Vilakazi showed that FePc modified electrodes gave the largest current increase upon NO oxidation when compared to the metal-free H 2 Pc and various other metallated MPcs, suggesting that the NO and FePc interaction is strong. 36 An analysis of the total density of states ͑DOS͒ and projected density of states ͑PDOS͒ of the FePc monomer before and after NO and NH 3 adsorption onto the Fe metal shows that both analytes can induce a change in the FePc electronic structure. 36 An analysis of the total density of states ͑DOS͒ and projected density of states ͑PDOS͒ of the FePc monomer before and after NO and NH 3 adsorption onto the Fe metal shows that both analytes can induce a change in the FePc electronic structure.…”

Section: B No and Nh 3 Induced Changes In The Fepc Monomer Electronimentioning

confidence: 99%

A density functional theory study on the binding of NO onto FePc films

Tran

Kummel

2007

The Journal of Chemical Physics

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To develop an atomistic understanding of the binding of NO with iron phthalocyanine (FePc), the interaction between NO (an electron withdrawing gas) and NH3 (an electron donating gas) with an isolated FePc molecule (monomer) was compared with density functional theory. The simulations show that NO strongly chemisorbs to the Fe metal and physisorbs to all the nonmetal sites. Additionally, when NO physisorbs to the inner ring nitrogens, NO subsequently undergoes a barrierless migration to the deep chemisorption well on the Fe metal. Conversely, NH3 only weakly chemisorbs to the Fe metal and does not bind to any other sites. Projected density of states simulations and analysis of the atomic charges show that the binding of NO to the FePc metal results in a charge transfer from the Fe metal to the NO chemisorbate; the opposite effect is observed for the binding of NH3 to the Fe metal. Simulations of NO binding to the Fe metal of a monolayer FePc film and FePc trimer were also performed to show that intermolecular FePc-FePc interactions have a negligible effect on the FePc electronic structure and NO binding.

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Section: B No and Nh 3 Induced Changes In The Fepc Monomer Electronimentioning

confidence: 99%

A density functional theory study on the binding of NO onto FePc films

Tran

Kummel

2007

The Journal of Chemical Physics

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“…lg A = 0.095308 -4.59 (6) and lg A = 0.0850B + 0.61 (7) (highly conducting samples [ 141) obtained for phthalocyanines in this laboratory.…”

Section: Resultsmentioning

confidence: 97%

“…2). (1) copper phthalocyanine doped with carbon black, (2) cobalt phthalocyanine doped with carbon, (3) cobalt phthalocyanine doped with iodine, (4) lead phthalocyanine doped with iodine [9], (5) to (7) low-conducting samples [4], (8) copper phthalocyanine doped with acetylene carbon black, (9) copper phthalocyanine thin films in NO, ambient It is interesting to note that: 1) the biggest relative changes in G were observed when small concentrations of NO, were present in the ambient;…”

Section: Resultsmentioning

confidence: 99%

“…The films are also considered to be applied in gas sensing devices, e. g. [9, 101. Such devices as to detect NO, e.g. [6,7] and NH, [8] have been already constructed on the basis of lead and copper phthalocyanines. The sensitivity of the electrical conductivity of copper phthalocyanine films to NO, has been also examinated in our laboratory.…”

Section: Introductionmentioning

confidence: 99%

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On the Compensation Behaviour of Copper Phthalocyanine Films in NOx Ambient

Talik

Wacławek

1990

phys. stat. sol. (a)

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“…The value of voltage exponent, in second section, shows that the traps in the bandgap of Sb 2 O 3 have exponential energy distribution [23,24]. In the ohmic region simply Ohm's law for n-type semiconductor may describe it [10]:…”

Section: Field E>10mentioning

confidence: 99%

Structure and electrical conduction of Sb2O3 thin films

Tigau

2006

Cryst. Res. Technol.

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Antimony trioxide (Sb 2 O 3 ) thin films have been deposited onto glass substrates using thermal evaporation technique at room temperature. The structural feature and surface morphology were characterized by transmission electron microscopy (TEM) and scanning electron microscopy (SEM). Sandwich-type structures were deposited with films thickness d = 0.55 µm using evaporated electrodes of silver. Current-voltage (J-U) characteristics have been measured at various fixed temperatures in the range 293-473 K. In all cases, at low electric field (E<10 4 V/cm), ohmic behavior is observed. However, at high electric field (E>10 4 V/cm), nonohmic behavior is observed. An analysis of the experimental data indicates that in the range of high-applied electric field, the dominant conduction mechanism is space charge limited currents (SCLC). Using the relevant SCLC theory, the carrier concentration, total trap concentration and the ratio of free charge to trapped charge have been calculated and correlated with changes in the structures of antimony trioxide thin films.

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Electrical, structural and gas sensing properties of zinc phthalocyanine thin films

Cited by 46 publications

References 22 publications

A density functional theory study on the binding of NO onto FePc films

A density functional theory study on the binding of NO onto FePc films

On the Compensation Behaviour of Copper Phthalocyanine Films in NOx Ambient

Structure and electrical conduction of Sb2O3 thin films

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