Browse Items (24 total)

  • Collection: Conjugated Molecules or Polymers

Organic photovoltaic devices and methods thereof.

The invention provides a novel fabrication method to produce solar cells using water-based inks that can be readily used in roll-to-roll processing, ink-jet printing and other large-scale fabrication processes. The invention also provides OPV…

Robust Circular Polarized Emission from Nanoscopic Single-Molecule Sources: Application to Solid State Devices.

Controlling the polarization state of fluorescence emission in solid state devices is an important goal in optical display technologies. High-purity (right or left) circular polarized emission is particularly desirable because an arbitrary linearly…

Conjugated polymer:TiO2 nanocomposite solar cells based on P3HT nanoparticles.

There is widespread interest in developing efficient solar cells derived from conjugated polymers and TiO2. The conjugated polymer can act as a light harvesting dye as well as a hole transport material, and can potentially replace both the…

Heterotriangulenes - Structure and properties

We report the solid-state structure, electrochemical properties, and photochemical properties of 1 and 2. The single-crystal X-ray structure shows that 1 assembles into densely packed columnar pi-stacks. 2 is observed as a racemic mixture of…

Bridged triarylamines: A new class of heterohelicenes

A series of bridged triarylamines, which constitute a new class of heterohelicenes, have been synthesized using a simple three-step procedure. These compounds are shown to be highly luminescent chromophores and are capable of being oxidized. The…

The maximin principle of pi-radical packings

A two-term model is proposed for hydrocarbon and N-containing pi-radicals which are in close contact with one another. The first term is attractive (due to partially occupied frontier T-orbitals), and the second, repulsive (due to hard-core repulsion…

Organic solar cells: An overview focusing on active layer morphology

Solar cells constructed of organic materials are becoming increasingly efficient due to the discovery of the bulk heterojunction concept. This review provides an overview of organic solar cells. Topics covered include: a brief history of organic…

Probing the chiroptical response of a single molecule

Chirally sensitive measurement techniques have generally been restricted to bulk samples. Here, we report the observation of fluorescence-detected circular dichroism (FDCD) from single (bridged-triarylamine) helicene molecules by using an excitation…

Single-molecule chiroptical spectroscopy: Fluorescence excitation of individual helicene molecules in polymer-supported thin-films

We present results of fluorescence excitation circular dichroism studies of the chiroptical response of single (bridged triarylamine) helicene molecules immobilized at a polymer interface. We extract directly dissymmetry parameters, and corresponding…