Self-assembled binary multichromophore dendrimers with enhanced electro-optic coefficients and alignment stability

Abstract

Self-assembled binary multichromophore dendrimers HDSD–FDSD have been developed to increase the poling efficiency, refractive Index and stability of the EO materials.

Chromophoric Dendrimer-Based Materials: An Overview of Holistic-Integrated Molecular Systems for Fluorescence Resonance Energy Transfer (FRET) Phenomenon

“…In this context, dendrimers emerge as excellent candidates since they can play a highly relevant role as unimolecular reactors at the nanoscale, acting as versatile and sophisticated entities [127,128]. These systems can be suitable for performing synchronously as a whole unit, integrating donor and acceptor chromophoric units in their structure [129]. In addition, their well-defined branched architectures would allow for various chromophore arrays with relative positions and orientations to create one-step or multi-step gradients (cascades) of energy and spatial focalization of the excitation energies [130].…”

Design and synthesis of chromophores with enhanced electro-optic activities in both bulk and plasmonic–organic hybrid devices

“…As the active component for the Pockels effect, OEO materials offer coefficients up to 1000 pm V À1 , with commercial materials producing over 300 pm V À1 (410Â lithium niobate), femtosecond (o30 fs) response times, and wide compatibilities to a variety of integration platforms and device structures. [26][27][28][29][30][31][32][33][34] OEO materials can also be easily integrated into devices by low-cost, high-throughput methods such as spin-coating, microdispensing, or ink-jet printing. The EO activity of organic materials is derived from second-order nonlinear optical (NLO) properties of the chromophores and is proportional to the product of chromophore hyperpolarizability (b), electric field poling-induced acentric order of the chromophores (hcos 3 yi), and chromophore number density (r N ).…”

“…[34][35][36] In past a decade, EO performance has been improved via strategies such as siteisolation, self-assembly, chromophore blending, and charge blocking layers (CBLs) to enhance the r N hcos 3 yi value of bulk materials. 26,28,31,33,[37][38][39][40][41][42][43][44][45][46][47][48][49] Recent work 50,51 has also shown substantial increases in hyperpolarizability due to theoryguided design, after years of little increase in b of reported chromophores.…”

The design and synthesis of nonlinear optical chromophores containing two short chromophores for an enhanced electro-optic activity

“…At the same time, other properties of the chromophore, such as solvability, thermal stability and poling orientation stability were enhanced accordingly. 22 Based on the isolation principle, many novel structures derived from steric groups have been designed such as hyperbranched Chromophore, 23 star-shaped Chromophores, 24,25 H-shaped chromophor, 26 multichromophore dendrimers 27 and other dendritic Chromophores [28][29][30] in order to minimize unwanted electrostatic interactions.…”