Preparation of some compounds and study their thermal stability for use in dye sensitized solar cells

Abdulraheem

Abstract

 The present work aimed to prepare some compounds for use in pigmented solar cells based on charge transfer (CT) complexation. For this purpose, first, several derivatives of 1,8–naphthalimide and benzanthrone fluores- cent dyes were synthesized. Secondly, the synthesized fluorescent dyes were complexed with picric acid (PA) ac- ceptor via CT interaction in methanol solvent at room temperature. Then, the synthesized CT complexes were stoichiometrically, spectroscopically and thermally characterized. The results obtained from CHN elemental anal- yses and spectrophotometric titrations indicated the formation of CT complexes with a molar ratio of 1:1 between the PA and each dye. The spectroscopic and physical parameters (KCT, εmax, ECT, f, μ, RN, IP, and ΔG°), the band gap energy (Eg), and the kinetic–thermodynamic parameters (E?, A, ΔS?, ΔH? and ΔG?) were calculated for each CT product in methanol solvent at room temperature. IR results indicated that the complexation be- tween each dye and PA acceptor occurs through π → π* and proton transfer interactions.