High sensitivity chlorine gas sensors using Cu–phthalocyanine thin films

Miyata, Toshihiro; Kawaguchi, Seiji; Ishii, Makoto; T, Minami

doi:10.1016/s0040-6090(02)01129-x

Cited by 60 publications

(41 citation statements)

References 13 publications

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“…These results are in good agreement with the reported results for MPcs lms. 6,10,35 The recovery time continuously decreases with increasing the temperature. At low temperature (up to 135 C), CoPc lms could not recover its base conductance even aer 2000 seconds.…”

Section: 11mentioning

confidence: 99%

“…Among the organic semiconductors, gas sensing properties of metal-phthalocyanine (MPcs) have been comprehensively studied owing to their high thermal stability (up to 400 C), semiconducting properties, exceptional barrier properties against strong acids and bases, tunability of chemical and physical properties, etc. [5][6][7][8][9][10][11][12] MPcs show many advantages over metal oxides and other inorganic materials such as high sensitivity, fast response, low operating temperature and ability to detect the toxic gas down to ppb level. 11,13,14 In the last few years, many efforts have been devoted to improve the sensitivity as well as low detection limit of the phthalocyanine based gas sensors.…”

Section: Introductionmentioning

confidence: 99%

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Enhanced Cl₂ sensitivity of cobalt-phthalocyanine film by utilizing a porous nanostructured surface fabricated on glass

et al. 2017

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In this paper, we demonstrate a very simple and effective approach to improve the sensitivity and the low detection limit of cobalt phthalocyanine (CoPc) films towards the detection of chlorine by creating a porous nanostructured surface on a glass substrate via a vapor phase etching process. CoPc films grown on etched glass (CoPc-etched films) exhibited entirely different morphology as compared to CoPc films grown on plain glass (CoPc-plain films). For 60 nm thickness, randomly distributed CoPc nanostructures were grown on the etched surface, whereas the CoPc-plain film showed an elongated granular structure. For 250 ppb Cl 2 exposure, the CoPc-etched film showed a response of $105%, which is $5 times higher than the CoPc-plain film (20%). In addition, it can detect Cl 2 down to 100 ppb concentration; this low detection limit is superior to CoPc-plain film (250 ppb). The improved gas sensing property of CoPc-etched film is ascribed to the presence of more interaction sites for gas adsorption, which is confirmed by charge transport, X-ray photoelectron spectroscopy and Kelvin probe measurement. This novel approach of improving the sensitivity and low detection limit paves a new way for the application of surface etching in the gas sensing field of organic semiconductors.

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Section: 11mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Enhanced Cl₂ sensitivity of cobalt-phthalocyanine film by utilizing a porous nanostructured surface fabricated on glass

et al. 2017

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“…It is worth mentioning that both sensitivity and response of MPcs to various analytes were found to depend on the nature of the metal atom and substituents in the aromatic ring as well as on the structure and molecular organization in the thin films [8]. Therefore, the peripheral substitution of the conjugated macrocycle of MPcs by electron-withdrawing or electron-donating groups is a facile way to vary sensitivity and selectivity of their films toward different analytes [9][10][11][12][13]. More specifically, the electron-withdrawing fluorine peripheral substituents alter the sensitivity of MPc species toward reducing gases [10].…”

Section: Introductionmentioning

confidence: 99%

Thin films of fluorinated 3d-metal phthalocyanines as chemical sensors of ammonia: An optical spectroscopy study

Basova

Mikhaleva

Hassan

et al. 2016

Sensors and Actuators B: Chemical

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Highlights-The sensor response of fluorinated metal phthalocyanines toward NH 3 was performed.-The sensor response was studied using surface plasmon resonance technique.-The effect of central metal in MPcF 16 molecule to the sensor response was verified.-The structure of analyte/phthalocyanine complex was analysed using DFT calculations.3 A comparative study of the sensor response toward gaseous ammonia of hexadecafluorinated 3d-metal phthalocyanine (MPcF 16 , M=Cu(II), Co(II), Zn(II), Ni(II)) thin films was performed using complementary experimental (viz., surface plasmon resonance, SPR, and IR absorption spectroscopy) along with theoretical (density functional theory calculations, DFT) techniques. SPR measurements revealed changes of both thickness and optical parameters (refraction indices and extinction coefficients) of the MPcF 16 films caused by adsorption of NH 3 . The MPcF 16 species studied exhibited the following order of sensor response: ZnPcF 16 > CoPcF 16  CuPcF 16 > NiPcF 16 . A good correlation was found between the DFT calculated (B3LYP/6-311++G(2df,p)) binding energies, experimentally measured shift of the selected IR bands, and the optical sensor response. Apart from this, we performed a detailed assignment of all intense bands in the vibrational spectra (IR and Raman) of fluorinated 3d-metal phthalocyanines studied.

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“…Copper (II) phthalocyanine (CuPc) is very important material, which guarantees stability and improved efficiency [5] of organic electroluminescent display panels because of its role for charge injection. This material is also potentially applicable for efficient organic solar cells [6], field effect transistor [7], molecular gas sensors [8], organic memories [9] and exhibit photoconductivity [6]. Knowledge of fundamental electronic and optical properties is very important for better understanding complex nature of the excited states of CuPc, for design and improvement of efficiency of existing CuPcbased devices.…”

Section: Introductionmentioning

confidence: 99%

Persistence in photoconductivity and optical property of nanostructured copper (II) phthalocyanine thin films

Karan¹,

Basak²,

Mallik³

2010

Current Applied Physics

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High sensitivity chlorine gas sensors using Cu–phthalocyanine thin films

Cited by 60 publications

References 13 publications

Enhanced Cl₂ sensitivity of cobalt-phthalocyanine film by utilizing a porous nanostructured surface fabricated on glass

Enhanced Cl₂ sensitivity of cobalt-phthalocyanine film by utilizing a porous nanostructured surface fabricated on glass

Thin films of fluorinated 3d-metal phthalocyanines as chemical sensors of ammonia: An optical spectroscopy study

Persistence in photoconductivity and optical property of nanostructured copper (II) phthalocyanine thin films

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High sensitivity chlorine gas sensors using Cu–phthalocyanine thin films

Cited by 60 publications

References 13 publications

Enhanced Cl2 sensitivity of cobalt-phthalocyanine film by utilizing a porous nanostructured surface fabricated on glass

Enhanced Cl2 sensitivity of cobalt-phthalocyanine film by utilizing a porous nanostructured surface fabricated on glass

Thin films of fluorinated 3d-metal phthalocyanines as chemical sensors of ammonia: An optical spectroscopy study

Persistence in photoconductivity and optical property of nanostructured copper (II) phthalocyanine thin films

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Enhanced Cl₂ sensitivity of cobalt-phthalocyanine film by utilizing a porous nanostructured surface fabricated on glass

Enhanced Cl₂ sensitivity of cobalt-phthalocyanine film by utilizing a porous nanostructured surface fabricated on glass