Browse Items (99 total)

Evidence of tunable macroscopic polarization in perovskite films using photo-Kelvin Probe Force Microscopy

Using photo-Kelvin Probe Force Microscopy (photo-KPFM) we observed macroscopic, photo-induced polarization through 200 nm thick polycrystalline methylammonium lead triiodide (MAPbI(3)) perovskite films in MAPbI(3)/charge carrier transport material…

High Energy Density in Azobenzene-based Materials for Photo-Thermal Batteries via Controlled Polymer Architecture and Polymer-Solvent Interactions

Energy densities of similar to 510 J/g (max: 698J/g) have been achieved in azobenzene-based syndiotactic-rich poly(methacrylate) polymers. The processing solvent and polymer-solvent interactions are important to achieve morphologically optimal…

Mixed Ionic–Electronic Conduction in Binary Polymer Nanoparticle Assemblies

Polymer-based mixed ionic–electronic conductors (MIECs) are desired for both bulk and interfacial materials in next-generation energy storage and electronic devices. Polymer-based MIECs contain two principal components, one for electronic conduction…

Role of Ionic Functional Groups on Ion Transport at Perovskite Interfaces

Hybrid organic/inorganic perovskite solar cells are invigorating the photovoltaic community due to their remarkable properties and efficiency. However, many perovskite solar cells show an undesirable current–voltage (I–V) hysteresis in their forward…

Preparation of enynes via copper-catalyzed stereoselective cross-coupling of terminal alkynes with vinyl iodides.

A copper(I)-catalyzed procedure for the synthesis of 1,3-enynes, e.g., 99 % Et (Z)-5-phenyl-2-penten-4-ynoate from phenylacetylene and Et (Z)-3-iodoacrylate using 10 mol% [Cu(bipy)(PPh3)Br] and 2.0 equiv K2CO3 in toluene at 110° for 8 h, is…

Process for preparation of aryl thioethers and aryl selenoethers by copper(I) catalyzed coupling of thiols and selenols with aryl halides.

A mild, palladium-free improved process for prepn. of aryl thioethers and selenoethers comprise reaction of thiols and selenols with aryl halides, preferably aryl iodides catalyzed by copper(I) halide complexes with bidentate ligands, preferably…

Process for preparation of benzo[b]heterocycles from arylacetylenes and halophenols or haloanilines in the presence of copper(I) catalysts.

Benzo[b]heterocycles were prepd. by reaction of an arylacetylene with an o-halophenol or o-haloaniline in the presence of a bidentate Cu(I) catalyst. Thus, reaction of PhC≡CH with 2-IC6H4NH2 in the presence of [Cu(phen)(PPh3)]NO3 (prepn. given) in…

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…

Aqueous-Processed Perovskite Solar Cells Based on Reactive Inkjet Printing

We report a one-step method for aqueous-processed perovskite active layer via reactive inkjet printing (RIJ) technique. The perovskite was successfully applied to fabricate solar cell
devices. This is to the best of our knowledge, the first time…

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…