Electrical, dielectric and electrochemical measurements of bulk aluminum phthalocyanine chloride (AlPcCl)

Soliman, I.M.; El-Nahass, M.M.; Mansour, Yasser

doi:10.1016/j.ssc.2015.10.011

Cited by 31 publications

(20 citation statements)

References 22 publications

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“…27 These characteristic features have been clearly observed for many organic molecules. 7,10,15,23,25,30,31 Furthermore, the frequency dependence in the AC conductivity regime can be explained by Jonscher's power law: 23…”

Section: Ac Conductivitymentioning

confidence: 99%

“…8a, exhibits two remarkable behaviors of s: (1) s decreases as the temperature is increased, and (2) the value of s remains below 1, confirming the appropriateness of the correlated barrier hopping (CBH) model. 7,10,15,23,27,29 In this model, charge transport mainly occurs due to hopping of charges between the two sides of the potential barrier. These findings are in agreement with several reports that investigated the charge transport mechanism in Pc molecules; For instance, Vidadi et al showed that the value of this exponent for MgPc thin films reached a maximum value of 1.75, at high frequencies.…”

Section: Ac Conductivitymentioning

confidence: 99%

“…For instance, the density of states of the AlPcCl and p-N,N dimethylamino benzylidene malononitrile (DBM) organic dyes at T = 293 K and frequency of 500 kHz was found to be 3.54 10 20 eV À1 cm À3 and 3.24 9 10 20 eV À1 cm À3 , respectively. 7,35 Therefore, this high density of electron states of the CuTTBPc compound suggests the possibility of its use in solar cell applications.…”

Section: Ac Conductivitymentioning

confidence: 99%

“…1,2 To enable the use of such organic molecules in photoelectronic devices and solar cells, they must exhibit several preferred features such as thermal stability, enhanced electrical conductivity, and affordable simple synthesis. [3][4][5][6] Phthalocyanine (Pc) compounds exhibit these characteristics, leading to wide interest in these materials over the last decade, which has revealed that they acquire unique properties in the presence of atoms of metallic elements such as Cu, Al, and Mg. 7,8 It has been found that Pc materials including a metallic atom (MPc) exhibit excess charge transport, in turn boosting their internal electronic properties; 8 For example, the density of states and activation energy of aluminum phthalocyanine chloride (AlPcCl) were calculated to be 4.11 9 10 19 cm À3 and 0.34 eV, respectively, 7 indicating strong charge carrier transport in this material.…”

Section: Introductionmentioning

confidence: 99%

“…This extracted value of DE M is compatible with results reported for large numbers of small organic molecules. 7,10,15,23,[27][28][29]…”

mentioning

confidence: 99%

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Dielectric Properties and AC Conductivity of Organic Films of Copper(II) 2,9,16,23-Tetra-tert-butyl-29H,31H- phthalocyanine

Darwish

Alharbi

Hawamdeh

et al. 2019

Journal of Elec Materi

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Copper(II) 2,9,16,23-tetra-tert-butyl-29H,31H-phthalocyanine (CuTTBPc) thin films have been obtained using a physical vapor deposition technique. X-ray diffraction analysis confirmed their amorphous nature. The dielectric constant and electrical conductivity were measured over the frequency range from 50 Hz to 8 MHz and temperature range from 293 K to 393 K. The dependence of the dielectric relaxation spectra on frequency at different temperatures was measured and discussed. In addition, the spectral dynamics of both the real and imaginary parts of the complex electric modulus over a wide temperature range is explained. The activation energy of the relaxation process (DE M) was estimated to be 0.26 eV. Moreover, the dependence of the alternating current conductivity on both temperature and frequency was investigated. Additionally, the exponent (s) of the power law of conductivity versus temperature confirmed that the correlated barrier hopping (CBH) model is a successful and appropriate mechanism to explain the charge transportation inside CuTTBPc films. According to this model, the density of localized states N(E F) at room temperature and frequency of 500 kHz was evaluated to be 4.11 9 10 23 eV À1 cm À3. This high density of electron states indicates that CuTTBPc can be recommended as a candidate material for use in solar cells.

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