Browse Items (99 total)

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…

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…

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…

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…

Indoor light recycling: a new home for organic photovoltaics

The field of organic photovoltaics (OPVs) has long focused on matching silicon solar cells, both in high power conversion efficiency (PCE) under solar light and broad absorption of the solar spectrum. We show that OPV devices, which have…

Evidence for reduced charge recombination in carbon nanotube/perovskite-based active layers

Using impedance spectroscopy and computation, we show that incorporation of multi-walled carbon nanotubes (MWCNTs) in the bulk of the active layer of perovskite-based solar cells reduces charge recombination and increases the open circuit voltage. An…

High Efficiency Tandem Thin-Perovskite/Polymer Solar Cells with a Graded Recombination Layer

Perovskite-containing tandem solar cells are attracting attention for their potential to achieve high efficiencies. We demonstrate a series connection of a similar to 90 nm thick perovskite front subcell and similar to 100 nm thick polymer:fullerene…

Tunable Percolation in Semiconducting Binary Polymer Nanoparticle Glasses

Binary polymer nanoparticle glasses provide opportunities to realize the facile assembly of disparate components, with control over nanoscale and mesoscale domains, for the development of functional materials. This work demonstrates that tunable…