Electrochemical Deposition of P3AT Films Used as a Probe of Optical Properties in Polymeric System

Abstract

Poly(3-alkylthiophene) (P3ATs) have been extensively used in photovoltaic devices such as a p-type organic Semiconductors. However, several electronic properties of P3ATs present energy transfer inter-and intra-chains that have direct consequences on the performance of optoelectronic devices. Traditionally electrochemical techniques, such as cyclic voltammetry, chronoamperometry and chronocoulometry, have been applied to process polymer thin ilms and unconventional spectroscopy techniques are used to characterize the electronic properties. In the present work, we used an innovative technique called ellipsometry emission to investigate the optical properties of P3AT ilms. We propose a new approach to study the electrochemical synthesize and unintentional doping processes of polymeric systems. We showed a strong correlation between the electrochemical synthesis and the optical properties controlling the ilm growth conditions for P3ATs. The results obtained in the present study can be potentially utilized for applications in organic devices, mainly in photovoltaic cells when the ilm deposition and the optical properties control are relevant.

Chronoamperometric deposition of transparent WO3 film for application as power efficient electrochromic auxiliary electrode

“…The uniformity of the deposited film can easily be controlled by adjusting the voltage and precursor concentration whereas the film thickness can be controlled by changing the time duration for which the pulse has been applied. In a work done by Soares de Sá et al, chronoamperometric method of polythiophene (organic) film deposition led to uniform films which found applications in organic devices [42]. Similarly in another work by Kim et al, CdS (inorganic) films were electrodeposited which were found to be compact and crystalline [43].…”