Silicon phthalocyanine: Vapor pressure and photovoltaic properties

• Published in: Synthetic metals 2020-08, Vol.266, p.116398, Article 116398
• Main Authors: Lazarev, Nikolay M., Petrov, Boris I., Bochkarev, Mikhail N., Arapova, Alla V., Kukinov, Andrei A., Cherkasov, Anton V.
• Format: Article
• Language: English
• Subjects: Buckminsterfullerene; Copper; Enthalpy of sublimation; Fullerenes; Heterojunctions; Knudsen effusion; Molecular structure; Photovoltaic cells; Photovoltaic properties; Process parameters; Properties (attributes); Saturated vapor pressure; Silicon; Silicon phthalocyanine; Solar cells; Spectrometry; Sublimation; Thermochemical properties; Thermogravimetric analysis; Tin; Vapor pressure
• ISSN: 0379-6779; 1879-3290
• DOI: 10.1016/j.synthmet.2020.116398

In this paper, we report on the study of the structure, thermal stability and phase transitions, the study of the composition of the vapor phase and the temperature dependence of the saturated vapor pressure, as well as photovoltaic properties of bis-(thrimethylsiloxy)phthalocyaninato silicon [SiPc(OSiMe3)2], using modern research methods. [Display omitted] •The silicon complex [SiPc(OSiMe3)2] is thermal stable at 20-520 °C.•The most intense peaks in the mass spectrum: [SiPc(OSiMe3)2]+ (m/z = 718.47) and [SiPc(OSiMe3)]+ (m/z = 629.58)•The pressure of the saturated vapor of was measured in the interval of 260–317 °С.•The photovoltaic material based on [SiPc(OSiMe3)2] have working characteristics, which are comparable with similar analogs. The basic physicochemical properties and molecular structure of bis-(thrimethylsiloxy). phthalocyaninato silicon [SiPc(OSiMe3)2] are investigated. The temperature of melting of this complex was measured by the DSC method in the temperature interval 20–520 °C (Tm=497 °C). Thermogravimetric analysis data showed mass loss occurs in the temperature range 275−500 °C. The mass loss in this temperature range is 96 %. Mass spectrometric studies of the composition of the gaseous phase of [SiPc(OSiMe3)2] was performed in the temperature range up to 450 °C. It was found that the complex is sublimated in monomeric form. The vapor pressure of the compound was determined as a function of temperature by the Knudsen effusion method. Based on the data obtained, the thermodynamic parameters of the sublimation process are calculated. The X-ray diffraction study revealed that molecular geometric parameters of [SiPc(OSiMe3)2] are varied slightly upon changing of temperature. The photovoltaic properties of [SiPc(OSiMe3)2] studied with heterojunction solar cell of configuration of ITO/complex /C60/Bphen/Al. The operating characteristics of the cell turned out comparable with the characteristics of earlier designed analogues devices based on phthalocyanine complexes of Cu, Zn and Sn.