Two‐step novel aromatic polyimide synthesis and characterization: Survey of energy calculations and diode applications

Abstract

Herein, aromatic polyimides (API) synthesis was carried out by polycondensation of the original diamine (new synthesis) and commercial dianhydride. The original diamine and API were characterized by different analysis techniques. In addition, experimental and quantum chemical calculations of the synthesized API were analyzed by density functional theory method. Quantum theory analysis of atoms in molecules was performed for a structural unit of the compound. Here, the proton transfer phenomenon was investigated. The main purpose of synthesizing API1 was diode application. Therefore, the Au/API-p-Si/Al diode was produced accomplishedly. When the electrical characterization of the obtained diode structure was made, electrical parameter values such as ideality factor (n) (between 1.9 and 3.8), barrier height (Φ B ) (0.73-0.28 eV), and series resistance (R s ) (1270-40,187 kΩ) were calculated.

Flexible Hierarchical Polyimide/Polypyrrole/Carbon Nanofiber Composite Films for Tunable Electromagnetic Interference Shielding

“…21 It is impossible to impregnate the PPy/CF films with PI precursor solution and then postcure them at high temperature, because PPy cannot resist high temperature. 22 Therefore, we synthesized PI resin using 6FDA and diamine (ME-MDA) with a methyl substitute group in the DMF, by fully imidizing at 220 °C to obtain the PI resin. The prepared PI resin can be dissolved in acetone with a solid content of 20 wt %, as shown in Figure 1b.…”

Advancements in Synthesis Strategies and Optoelectronic Applications of Bio-Based Photosensitive Polyimides

“…Tis method mainly introduces photosensitive functional groups after the formation of polyamic acid (PAA), thus preparing photosensitive polyimides [48,49]. Ogura et al [50] synthesized semialicyclic polyamic acid (PAA) by 3,3′,4,4′-biphenyltetracarboxylic dianhydride and trans-1,4-cyclohexane diamine and combined DNCDP as a photobase generator, successfully developed a negative-type photosensitive polyimide (PSPI) based on semialicyclic PAA.…”