Controlled deposition of new organic ultrathin film as a gate dielectric layer for advanced flexible capacitor devices

Abstract

This letter describes a new organic (1-bromoadamantane) ultrathin film as gate dielectric, which was successfully deposited by sol-gel spin-coating process on a flexible polyimide substrate at room temperature. The metal-insulator-metal (MIM) device with organic (1-bromoadamantane) ultrathin (10 nm) film as gate dielectric layer operated at gate voltage of 5.0 V, showing a low leakage current density (5.63 9 10 -10 A cm -2 at 5 V) and good capacitance (2.01 fF lm -2 at 1 MHz). The chemical structure of the 1-bromoadamantane layer was investigated by Fourier transform infrared spectrometer. The excellent leakage current density and better capacitance, probably due to the presence of polar, non-polar, low-polar groups, and bromine atoms in ultrathin film. Practical properties of the film in MIM capacitor such as dielectric constant as well as bending result of leakage current density and breakdown voltage have been better related to such fundamental adhesion nature over flexible substrate. This permits estimation of the properties of new dielectric in thin film form and short lists of the best materials for low loss and good capacitance flexible capacitors could be drawn up in future.

Electrical characterization of Al/PTF/PEDOT:PSS/ITO heterojunction structure

“…6b (linear intermediate bias regions) and Eqs. (3,4,5). The I o , n, U Bo values were found to be 1.22 9 10 -6 A, 4.55 and 0.69 eV respectively ( Table 1).…”

“…As can be seen from Fig. 3 poly(pentachlorophenyl methacrylate) shows two absorption peaks at about 251 and 274 nm in the UV region and these peaks are associated with a band gap (pp* electronic transition) [2,5,[12][13][14]. There are two kinds of optical transitions at crystalline and noncrystalline materials: direct band and indirect band transitions.…”

“…There are two kinds of optical transitions at crystalline and noncrystalline materials: direct band and indirect band transitions. The optical band gap of polymer was estimated by fundamental relation given by [2,4,5,12,13,[15][16][17][18][19]:…”

“…This productions with low cost and low temperature open as wide field of applications, such as displays, Schottky diodes, organic light emitting diode (OLED), organic solar cells etc. [1][2][3][4][5][6][7][8][9]. There are different deposition methods to obtain thin film of polymer materials.…”

High-Performance Polymer Type Capacitors

“…Meena et al [46] developed a new organic (1-bromoadamantane) ultrathin film as a gate dielectric, which was deposited by a sol-gel spin-coating process on a flexible polyimide substrate at room temperature. They demonstrated the practical properties of the film in the metal-insulator-metal (MIM) capacitor such as dielectric constant as well as bending result of leakage current density and breakdown voltage to be better related to such fundamental adhesion nature over a flexible substrate.…”