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Great attention to cost-effective high-efficiency solar power conversion of trihalide perovskite solar cells (PSCs) has been hovering at high levels in the recent 5 years. Among PSC devices, admittedly, TiO2 is the most widely used electron transport layer (ETL); however, its low mobility which is even less than that of CH3NH3PbI3 makes it not an ideal material. In principle, SnO2 with higher electron mobility can be regarded as a positive alternative. Herein, a SnO2 nanocolloid sol with ≈3 nm in size synthesized at 60 °C was spin-coated onto the fuorine-doped tin oxide (FTO) glass as the ETL of planar CH3NH3PbI3 perovskite solar cells. TiCl4 treatment of SnO2-coated FTO is found to improve crystallization and increase the surface coverage of perovskites, which plays a pivotal role in improving the power conversion efficiency (PCE). In this report, a champion efficiency of 14.69% (Jsc = 21.19 mA cm−2, Voc = 1023 mV, and FF = 0.678) is obtained with a metal mask at one sun illumination (AM 1.5G, 100 mW cm−2). Compared to the typical TiO2, the SnO2 ETL efficiently facilitates the separation and transportation of photogenerated electrons/holes from the perovskite absorber, which results in a significant enhancement of photocurrent and PCE. [ABSTRACT FROM AUTHOR]

Utilizing photoelectrochemical (PEC) cells to directly collecting solar energy into chemical fuels (e.g., H2 via water splitting) is a promising way to tackle the energy challenge. α‐Fe2O3 has emerged as a desirable photoanode material in a PEC cell due to its wide spectrum absorption range, chemical stability, and earth abundant component. However, the short excited state lifetime, poor minority charge carrier mobility, and long light penetration depth hamper its application. Recently, the elegantly designed hierarchical macroporous composite nanomaterial has emerged as a strong candidate for photoelectrical applications. Here, a novel 3D antimony‐doped SnO2 (ATO) macroporous structure is demonstrated as a transparent conducting scaffold to load 1D hematite nanorod to form a composite material for efficient PEC water splitting. An enormous enhancement in PEC performance is found in the 3D electrode compared to the controlled planar one, due to the outstanding light harvesting and charge transport. A facile and simple TiCl4 treatment further introduces the Ti doping into the hematite while simultaneously forming a passivation layer to eliminate adverse reactions. The results indicate that the structural design and nanoengineering are an effective strategy to boost the PEC performance in order to bring more potential devices into practical use. [ABSTRACT FROM AUTHOR]

Light-harvesting and charge collection have attracted increasing attention in the domain of photovoltaic cells, and can be facilitated dramatically by appropriate design of a photonic nanostructure. However, the applicability of current light-harvesting photoanode materials with single component and/or morphology (such as, particles, spheres, wires, sheets) is still limited by drawbacks such as insufficient electron-hole separation and/or light-trapping. Herein, we introduce a universal method to prepare hierarchical assembly of macroporous material-nanowire coated homogenous or heterogeneous metal oxide composite electrodes (TiO2-TiO2, SnO2-TiO2, and Zn2SnO4-TiO2; homogenous refers to a material in which the nanowire and the macroporous material have the same composition, i.e. both are TiO2. Heterogeneous refers to a material in which the nanowires and the macroporous material have different compositions). The dye-sensitized solar cell based on a TiO2-macroporous material-TiO2-nanowire homogenous composition electrode shows an impressive conversion efficiency of 9.51 %, which is much higher than that of pure macroporous material-based photoelectrodes to date. [ABSTRACT FROM AUTHOR]

The title compound, C22H18N2O3, was synthesized by oxidation of benzoic acid (3-benzyl­oxy-4-methoxy­benzyl­idene)­hy­dra­zide with bis­(tri­fluoro­acetoxy)­iodo­benzene in chloro­form at room temperature. [ABSTRACT FROM AUTHOR]

The title compound, C15H14F2N2O2S, was synthesized by the reaction of 1-(2,4-difluorophenyl)ethanone and 4-methylbenzenesulfonohydrazide in ethanol under reflux. The crystal structure is stabilized mainly through intermolecular N—H...O hydrogen bonds. The C=N—N group displays a trans conformation. [ABSTRACT FROM AUTHOR]

In the title compound, C15H18N2O4S, the packing is consolidated by an intra/intermolecular bifurcated O—H...(O,O) and intermolecular N—H...S hydrogen bonds. The tetrahydropyrimidin-2-one ring is twisted. [ABSTRACT FROM AUTHOR]

The title compound, C14H16N2O4S, was synthesized by the reaction of 4-hydroxy-3-methoxybenzaldehyde, thiourea and methyl 3-oxobutanoate in ethanol under reflux. The crystal structure is stabilized mainly through intermolecular N—H...S and O—H...O hydrogen bonds. The tetrahydropyrimidin-2-one ring is twisted. [ABSTRACT FROM AUTHOR]

There are two molecules in the asymmetric unit of the title compound, C10H12N2O3, with almost identical conformations. The crystal structure is stabilized by intermolecular N—H...O hydrogen bonds. [ABSTRACT FROM AUTHOR]

The title compound, C14H12ClNO2,was prepared from 4-hydroxy-3-methoxybenzaldehyde and 4-chlorophenylamine. The two aromatic substituents lie trans to each other across the C=N bond, with a dihedral angle of 44.40 (8)° between the two rings [ABSTRACT FROM AUTHOR]

The title compound, C11H15NO3, was synthesized from 4-methoxyphenol and 2-methyl-4,5-dihydrooxazole under nitrogen. There are two independent molecules in the asymmetric unit, which are connected into one-dimensional chains via intermolecular N—H...O hydrogen bonds. [ABSTRACT FROM AUTHOR]

The crystal structure of the title compound, C10H12BrNO2, is stabilized mainly through intermolecular N—H...O hydrogen bonds. [ABSTRACT FROM AUTHOR]

The title compound, C16H20N2O6, was synthesized from 3,4,5-trimethoxybenzaldehyde, methyl 3-oxobutanoate and urea in acetonitrile catalysed by Bi(NO3)3. The tetrahydropyrimidin-2-one ring is twisted and two molecules are connected by N—H...O hydrogen bonds. [ABSTRACT FROM AUTHOR]

The title compound, C17H18N2O5·H2O, was synthesized by the reaction of 4-hydroxy-3-methoxybenzaldehyde and 3,5-dimethoxybenzohydrazide. The dihedral angle between the two benzene rings is 28.9 (1)°. The crystal structure is stabilized by intermolecular O—H...O, O—H...N and N—H...O hydrogen bonds. [ABSTRACT FROM AUTHOR]

In the title compound, C24H22Cl2N2O2S, synthesized from 2-(2-methoxy­phenyl­sulfan­yl)benzoyl chloride and 1-(2,3-dichloro­phen­yl)piperazine, the piperazine ring adopts a normal chair conformation. [ABSTRACT FROM AUTHOR]