Overcoming the Interfacial Photocatalytic Degradation of Nonfullerene Acceptor-Based Organic Photovoltaics by Introducing a UV-A-Insensitive Titanium Suboxide Layer.

Although recent dramatic advances in power conversion efficiencies (PCEs) have resulted in values over 19%, the poor photostability of organic photovoltaics (OPVs) has been a serious bottleneck to their commercialization. The photocatalytic effect, which is caused by incident ultraviolet-A (UV-A, 320-400 nm) light in the most commonly used zinc oxide (ZnO) electron transport layer (ETL), significantly deteriorates the photostability of OPVs. In this work, we develop a new and facile method to enhance the photostability of nonfullerene acceptor-based OPVs by introducing UV-A-insensitive titanium suboxide (TiO) ETL.

In Situ Doping of the PEDOT Top Electrode for All-Solution-Processed Semitransparent Organic Solar Cells.

The development of an ideal solution-processable transparent electrode has been a challenge in the field of all-solution-processed semitransparent organic solar cells (ST-OSCs). We present a novel poly(3,4-ethylenedioxythiophene):polystyrenesulfonate (PEDOT:PSS) top electrode for all-solution-processed ST-OSCs through in situ doping of PEDOT:PSS. A strongly polarized long perfluoroalkyl ( = 8) chain-anchored sulfonic acid effectively eliminates insulating PSS and spontaneously crystallizes PEDOT at room temperature, leading to outstanding electrical properties and transparency of PEDOT top electrodes.

Straightforward formation of dianionic acetonylate: self-assembly of mercury(II) with pyridyl donor ligands in acetone.

Self-assembly of Hg(ClO) with a new bidentate ligand (L) in acetone at room temperature produces single crystals consisting of unusual discrete tetranuclear complexes [Hg(ClO)(CHCOCH)L]·CHCOCH straightforward formation of dianionic acetonylate CHCOCH in a quantitative yield.

Trimetallic coordination cage formation for nitrate encapsulation: transformation of kinetic products into thermodynamic products.

A procedure for the formation of a nitrate-encapsulating tripalladium(II) cage self-assembly of Pd(NO) with 1,3-bis(dimethyl(pyridin-4-yl)silyl)propane (L) was developed. The self-assembly reaction initially produces spiro-type macrocycles, PdL, and finally results in transformation into a nitrate-encapsulated cage, [(NO)@PdL], in the mother liquor. The reaction of PdX (X = BF, ClO, PF, and CFSO instead of NO) with L gives rise to a spiro species, PdL, as the final product, and anion exchange of the spiro products, [PdL](X), with NO produces the tripalladium cage [(NO)@PdL].