Broadband dielectric spectroscopy of 6, 13-bis (tri-isopropylsilylethynyl) pentacene (TIPS-pentacene)

作者：Murtaza, Ghulam^*; Ahmad, Ishtiaq; Wu, Jiake

来源：Materials Science in Semiconductor Processing, 2015, 34: 269-275.

DOI：10.1016/j.mssp.2015.02.011

• Electrical properties
• Electrical conductivity
• Powder diffraction
• Crystal structure

The frequency and temperature dependent conductivity and dielectric properties of 6, 13-bis (tri-isopropylsilylethynyl) pentacene (TIPS-pentacene) are studied;All measurements are carried out over a wide range of frequency (10(0)-10(5) Hz) and temperature (-50 degrees C to 150 degrees C). The conductivity-temperature plots are found to follow an Arrhenius relation till 105 degrees C then deviation in behavior takes place due to the phase transition. The existence of dielectric loss peaks at two positions alpha, beta suggests the presence of relaxing dipoles in the material. The dielectric behavior is analyzed using dielectric permittivity (epsilon*), dielectric loss (tan delta) and electric modulus (M*) of the sample. It is found that the value of dielectric constant decreases with the increase of frequency and increases with the increase of temperature.

• 出版日期2015-6
• 单位浙江大学