Structural, Electrical and Optical Properties of Pyrrolo[1,2-i][1,7] Phenanthroline-Based Organic Semiconductors

Abstract

This work reports a study on structural, electrical and optical properties of some recently synthesized pyrrolo[1,2-i][1,7] phenanthrolines derivatives in thin films. The thin films were deposited onto glass substrates by spin coating technique, using chloroform as solvent. The obtained films exhibited a polycrystalline structure with an n–type semiconductor behavior after heat treatment in the temperature range 293–543 K, specific to each sample. The thermal activation energy lies between 0.68 and 0.78 eV, while the direct optical band gap values were found in the range 4.17–4.24 eV. The electrical and optical properties of the investigated organic semiconductor films were discussed in relation to microstructural properties, determined by the molecular structure. The investigated organic compounds are promising for applications in organic optoelectronics and nanoelectronics.

A Review on the Synthesis of Fluorescent Five- and Six-Membered Ring Azaheterocycles

“…Indolizine derivatives with phenanthroline skeleton [ 71 , 72 , 73 ] were another research field in our group due to both their potential biological activities and their extended π-electron system which make them valuable materials in the construction of new optoelectronic devices. Compounds 114a – g and 115a – e were synthesized in our group using the same 3+2 dipolar cycloaddition strategy of cycloimmonium ylides to activated alkynes (see Scheme 31 ) [ 71 ].…”