Effect of temperature, humidity and pressure on electric properties of the cells based on PTB7-Th, PC.sub.61BM and graphene composite

• Published in: Journal of thermal analysis and calorimetry 2021-02, Vol.143 (4), p.3033
• Main Authors: Karimov, Khasan S, Riaz, Muhammad, Nabi, Jameel-Un
• Format: Article
• Language: English
• Subjects: Analysis; Dielectric films; Electric properties; Graphene; Graphite; Humidity; Microcomputers; Thin films
• ISSN: 1388-6150; 1588-2926
• DOI: 10.1007/s10973-020-09467-4

In this paper, fabrication and characterization of Cu/PTB7-Th (35 mass%)/PC [Formula omitted]BM (35 mass%)/graphene (30 mass%)/Ag thin-film composite cells are given. First of all, Ag and Cu electrodes were deposited on flat glass substrate by vacuum evaporation with 130- [Formula omitted]m inter-electrode gap. The PTB7-Th (35 mass%) composite and PC [Formula omitted]BM (35 mass%) composite in chlorobenzene and graphene (30 mass%) were deposited on the inter-electrode gap by drop-casting technique, and film thickness of 8-12 [Formula omitted]m was achieved. The dependence of forward and reverse bias resistance of the cells versus temperature in the range of 25-75 [Formula omitted]C, humidity in the range of 47-90 %RH and pressure in the range of 0-7.7 kN m [Formula omitted] was measured. The average temperature resistance coefficients were equal to (- 1.03)% [Formula omitted] and [Formula omitted] for forward and reverse bias resistances, respectively. The reverse and forward bias resistances decreased 1.29 and 1.27 times due to [Formula omitted], and due to pressure, it decreased by 9.0-9.2%. Impedance (Z) of the sample was also measured at different frequencies (100 Hz, 1 kHz, 10 kHz and 100 kHz) which decreased from 1.23 to 1.04 times. The obtained results are explained, firstly, by transfer of charges between donors and acceptors molecules and effect of water molecules on the PTB7-Th (35 mass%):PC [Formula omitted]BM (35 mass%):graphene composite.