Impedance spectroscopic study on hybrid phthalocyanine/lead sulfide nanocomposite film

Zahra Khozaee; Isabelle Chambrier; Lydia Sosa Vargas; Andy Cammidge; Asim Ray

doi:10.1142/S1088424619502055

Impedance spectroscopic study on hybrid phthalocyanine/lead sulfide nanocomposite film

Zahra Khozaee, Isabelle Chambrier, Lydia Sosa Vargas, Andy Cammidge, Asim Ray

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Abstract

A unique organic/inorganic nanocomposite of non-aggregated lead sulphide (PbS) quantum dots (QDs) dispersed within a spun film of non-peripherally octakis(hexyl)-substituted metal-free phthalocyanine (C6H2Pc) has been prepared at room temperature by a simple and low-cost method. The frequency response of alternating current (AC) conduction in a 130 nm thick C6H2Pc /PbS film sandwiched between the indium-tin-oxide (ITO) and aluminum (Al) electrodes is found to obey the universal power-law. The cryogenic study of AC conduction reveals that the correlated barrier hopping (CBH) model closely fits to the experimental data at temperatures below 240 K. The parameters obtained by fitting the CBH model point out that the hopping process cannot take place directly between neighboring PbS QDs but involves the localized states within the matrix.

Original language	English
Pages (from-to)	1622-1628
Number of pages	7
Journal	Journal of Porphyrins and Phthalocyanines
Volume	23
Issue number	11
DOIs	https://doi.org/10.1142/S1088424619502055
Publication status	Published - Dec 2019

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10.1142/S1088424619502055

Impedence JPP accepted MSAccepted author manuscript, 1.5 MB

Andy Cammidge
- A.Cammidgeuea.acuk
- School of Chemistry, Pharmacy and Pharmacology - Professor of Chemistry
- Centre for Photonics and Quantum Science - Member
- Chemistry of Light and Energy - Member
- Chemistry of Materials and Catalysis - Member
Person: Research Group Member, Academic, Teaching & Research

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title = "Impedance spectroscopic study on hybrid phthalocyanine/lead sulfide nanocomposite film",

abstract = "A unique organic/inorganic nanocomposite of non-aggregated lead sulphide (PbS) quantum dots (QDs) dispersed within a spun film of non-peripherally octakis(hexyl)-substituted metal-free phthalocyanine (C6H2Pc) has been prepared at room temperature by a simple and low-cost method. The frequency response of alternating current (AC) conduction in a 130 nm thick C6H2Pc /PbS film sandwiched between the indium-tin-oxide (ITO) and aluminum (Al) electrodes is found to obey the universal power-law. The cryogenic study of AC conduction reveals that the correlated barrier hopping (CBH) model closely fits to the experimental data at temperatures below 240 K. The parameters obtained by fitting the CBH model point out that the hopping process cannot take place directly between neighboring PbS QDs but involves the localized states within the matrix.",

author = "Zahra Khozaee and Isabelle Chambrier and {Sosa Vargas}, Lydia and Andy Cammidge and Asim Ray",

year = "2019",

month = dec,

doi = "10.1142/S1088424619502055",

language = "English",

volume = "23",

pages = "1622--1628",

journal = "Journal of Porphyrins and Phthalocyanines",

issn = "1088-4246",

publisher = "Society of Porphyrins and Phthalocyanines (SPP)",

number = "11",

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T1 - Impedance spectroscopic study on hybrid phthalocyanine/lead sulfide nanocomposite film

AU - Khozaee, Zahra

AU - Chambrier, Isabelle

AU - Sosa Vargas, Lydia

AU - Cammidge, Andy

AU - Ray, Asim

PY - 2019/12

Y1 - 2019/12

N2 - A unique organic/inorganic nanocomposite of non-aggregated lead sulphide (PbS) quantum dots (QDs) dispersed within a spun film of non-peripherally octakis(hexyl)-substituted metal-free phthalocyanine (C6H2Pc) has been prepared at room temperature by a simple and low-cost method. The frequency response of alternating current (AC) conduction in a 130 nm thick C6H2Pc /PbS film sandwiched between the indium-tin-oxide (ITO) and aluminum (Al) electrodes is found to obey the universal power-law. The cryogenic study of AC conduction reveals that the correlated barrier hopping (CBH) model closely fits to the experimental data at temperatures below 240 K. The parameters obtained by fitting the CBH model point out that the hopping process cannot take place directly between neighboring PbS QDs but involves the localized states within the matrix.

AB - A unique organic/inorganic nanocomposite of non-aggregated lead sulphide (PbS) quantum dots (QDs) dispersed within a spun film of non-peripherally octakis(hexyl)-substituted metal-free phthalocyanine (C6H2Pc) has been prepared at room temperature by a simple and low-cost method. The frequency response of alternating current (AC) conduction in a 130 nm thick C6H2Pc /PbS film sandwiched between the indium-tin-oxide (ITO) and aluminum (Al) electrodes is found to obey the universal power-law. The cryogenic study of AC conduction reveals that the correlated barrier hopping (CBH) model closely fits to the experimental data at temperatures below 240 K. The parameters obtained by fitting the CBH model point out that the hopping process cannot take place directly between neighboring PbS QDs but involves the localized states within the matrix.

U2 - 10.1142/S1088424619502055

DO - 10.1142/S1088424619502055

M3 - Article

VL - 23

SP - 1622

EP - 1628

JO - Journal of Porphyrins and Phthalocyanines

JF - Journal of Porphyrins and Phthalocyanines

SN - 1088-4246

IS - 11

ER -

Impedance spectroscopic study on hybrid phthalocyanine/lead sulfide nanocomposite film

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