Silole‐Containing Polymers: Chemistry and Optoelectronic Properties

Abstract

In this review, the synthesis and optoelectronic properties of various π‐conjugated‐, σ‐conjugated‐, pendanted‐, and hyperbranched or dendritic silole‐containing polymers (SCPs) are described. So far, substituted silole, dibenzosilole, dithienosilole, and bis‐silicon‐bridged stilbene have been incorporated into SCPs. The tunable bandgaps from 4.0–1.55 eV, variable fluorescent colors from UV to blue, green, and red (RGB) light, fluorescent chemo‐sensors for 2,4,6‐trinitrotoluene (TNT)‐type explosives, aggregation‐induced emission, efficient electroluminescence emissions for RGB lights, phosphorescent hosts with high triplet energy level, efficient solar cells, stable field‐effect transistors with high hole mobility in air, and attenuation of strong laser power, are the important features of SCPs.

Synthesis and Photoelectronic Properties of Thermally Stable Poly[oxy(2,7-fluoren-9-onenylene)oxy(diorganosilylene)]s

“…[1][2][3][4] Fluorescent organosilicon polymers containing a polyconjugated system have also been of great interest for the use in plastic electronic devices such as field-effect transistors (FETs), light-emitting diodes (LEDs) or photovoltaic cells. 5,6 For example, polysiloxanes containing pyrene or carbazole in the polymer side chain have been prepared by hydrosilation reactions of poly(methylhydrosiloxane) with vinyl-or allyl-functionalized pyrene or carbazole.…”

Conjugated Polymers for Organic Solar Cells

“…Compared with many other 5-membered heterocyclopentadiene, such as thiophene, furan or pyrrole, the silole (silacyclopentadiene) ring has the smallest HOMO-LUMO band gap and the lowest lying LUMO level due to the * to * conjugation arising from interaction between the * orbital of two exocyclic bonds on silicon and the * orbital of the butadiene moiety. The small band gap and lowest LUMO energy level render silole outstanding optoelectronic properties such as high PL efficiency and excellent electron mobility (Chen & Cao, 2007). Random and alternating silole-containing copolymers P18 (Chart 5) (F. Wang et al, 2005) were synthesized via Suzuki coupling reaction from fluorene and 2,5-dithienyl-silole.…”

Synthesis and optical properties of a bis(diphenylphosphino)dithienosilole‐digold(I) complex

“…Silole derivatives have been well studied as functional materials, such as organic semiconductors, emissive materials, and photovoltaic materials [1][2][3]. Applications of siloles in organic light-emitting diodes (OLEDs) as electron-transporting materials were first reported by Tamao, Yamaguchi, and coworkers [4].…”