Poly(3-hexylthiophene)-zinc oxide rectifying junctions

Abstract

The rectifying junction formed at the interface of solvent-cast, as-prepared poly(3-hexylthiophene) (P3HT) and conductive ZnO-coated glass was investigated by recording the /-Vand C-Vcharacteristics. The data have been discussed in terms of the Schottky thermionic-emission current transport model. The diode "quality factor" determined for these devices was 3.6, and indicated imperfect model fitting. The Schottky barrier was estimated as 0.93 eV. A negative differential resistance regime was observed for P3HT/ZnO devices under reverse-bias high-field conditions. This effect was concluded to be a filament-formation burnout failure process.

Light-Induced Electron Paramagnetic Resonance Study of Poly(3-alkylthiophene)/Fullerene Composites

“…The intrinsic concentration of doping-initiated polarons counting only upon the polymer fraction in the P3HT/PCBM composite was determined at 77 K to be 1.6 × 10 19 cm −3 . This value lies near 2 × 10 19 cm −3 obtained for the concentration of acceptors in ZnO-treated P3HT . An effective concentration calculated counting upon both the polymer and the fullerene components of this composite is 1.8 × 10 18 cm −3 .…”

“…This value lies near 2 × 10 19 cm -3 obtained for the concentration of acceptors in ZnO-treated P3HT. 34 An effective concentration calculated counting upon both the polymer and the fullerene components of this composite is 1.8 × 10 18 cm -3 . The intrinsic and effective concentrations determined for I 2 -doped P3DDT/PCBM system are 4.6 × 10 18 and 1.0 × 10 18 cm -3 , respectively.…”

Light-induced EPR study of charge transfer in P3HT/bis-PCBM bulk heterojunctions

“…The maximum density of polaron transport states was estimated, 37 obtained for concentration of acceptors in ZnO-treated P3HT. 38 Effective concentration calculated for both polymer and fullerene phases in the composite under study is 2.1 x 10 18 cm -3 . This allows one to evaluate an effective number of both types of charge carriers per each polymer unit initiated in the polymer/fullerene composites by light irradiation (see Fig.…”

Stably dispersible P3HT/ZnO nanocomposites with tunable luminescence by in-situ hydrolysis and copolymerization of zinc methacrylate

“…Among them, poly(3-hexylthiophene)/ZnO nanocomposites are attracting more and more attentions in the application of photovoltaic cells [3][4][5][6] and light emitting diodes [7]. Poly(3-hexylthiophene) (P3HT) is the most widely investigated conjugated polymer, which consists of a rather rigid backbone with pendant hexyl side chains that allow solubilization, due to its excellent optical and electrical properties as well as exceptional thermal and chemical stability [8].…”