Despite its competitive photovoltaic efficiency, the structural transformations of prototypical hybrid perovskite, methylammonium lead iodide, are facilitated by interactions with polar molecules. Changes in optical and electronic properties upon exposure to ammonia potentially can enable use perovskites gas-sensing applications. We investigated effects on CH3NH3PbI3 exposing perovskite films a wide range vapor pressures. Spectroscopic analyses indicated that ammonium cations replaced...

Following the remarkable success of application CH3NH3PbI3 perovskites in photovoltaics, a great focus has been placed on their stability to improve optoelectronic properties and seek commercial production. To gain better understanding thermal stability, we investigated chemical, morphological, photovoltaic transformations under elevated temperatures various controlled atmospheric conditions (vacuum, 1 mbar O2, H2O). A temperature-dependent study showed that decomposed PbI2 with release...

Abstract Methylammonium lead iodide perovskite (MAPbI 3 ), a prototype material for potentially high‐efficient and low‐cost organic–inorganic hybrid solar cells, has been investigated intensively in recent years. A study of low‐energy electron‐induced transformations MAPbI is presented, performed by combining controlled electron‐impact irradiation with X‐ray photoelectron spectroscopy scanning electron microscopy. Changes were observed both the elemental composition morphology irradiated...

ZnO nanostructures have been extensively employed in optoelectronic devices because of their unique properties, however, the developed using physical vapor deposition techniques, which are costly and...

Fabrication of single crystalline, oriented one-dimensional (1D) rods or wires titania on transparent conducting oxide (TCO) substrates have enormous significance in the area photoelectrochemical research owning to their unique optoelectronic properties. It is possible modify electrical conductivity and properties by intentional inclusion atomic impurity material. Here for first time, we doped lanthanum homogeneously TiO2 nanorod arrays. The homogeneous distribution lattice confirmed...

Template-free synthesis of phase pure one-dimensional (1D), single crystalline rutile titania nanorods or wires at low temperature still remains a challenging task due to its complex nature surface chemistry. In these 1D structures, charge transport is highly favored. To further modify the electrical conductivity and optoelectronic properties nanostructures, various methods such as doping TiO2 with metal nonmetal branched hybrid structures are developed. If can directly synthesize on...

Unlike heavier elements, the migration of hydrogen species in perovskite materials cannot be directly tracked using imaging or mass spectrocopy techniques. Our results show that quantitative analysis D/H exchange PbCH3ND3I3 allows indirect monitoring H by following N–D vibration polarization-modulated infrared reflection–absorption spectroscopy. Kinetic shows isotope process is pseudo-first order and particularly sensitive to intensity light relative humidity, and, a lesser degree, sample...

Herein, we report a detailed experimental study supported by DFT calculations to understand the mechanism behind synthesis of cefradine (CFD--an antibiotic) labeled gold nanoparticles (Au NPs) employing CFD as both mild reducing and capping agent. The analysis effect growth conditions reveals that higher concentration HAuCl4 results in formation an increasing fraction anisotropic structures, temperature leads quasi-spherical particles instead ones, larger pH much smaller particles. cyclic...

In comparison to the one-dimensional (1D) semiconductor nanostructures, hierarchical, three-dimensional (3D) microstructures, composed of arrays 1D nanostructures as building blocks, show quite unique physicochemical properties due efficient photon capture and enhanced surface volume ratio, which aid in advancing performance various optoelectronic devices. this contribution, we report fabrication surfactant-free, radially assembled, 3D titania (rutile-phase) microsphere (3D-TMSAs) bundles...

We report an investigation of lead halide perovskite CH3NH3PbBr3 nanocrystals and associated ligand molecules by combining several different state-of-the-art experimental techniques, including synchrotron radiation-based XPS VUV PES free-standing isolated in vacuum. By using this novel approach for materials, we could directly obtain complete band alignment to vacuum both the ligands widely used their preparation. discuss possible influence apparent properties, compare electronic properties...

Herein, we report a novel single multifunctional platform based on broad-spectrum photoactive<italic>β</italic>-NaGdF₄:18% Yb³⁺, 2% Er³⁺and mesoporous anatase TiO₂for enhanced energy and simultaneous biomedical applications.

The fabrication of one-dimensional (1D) rods or wires titania in desired crystalline facets is quite exciting due to unique optoelectronic properties. single crystalline, oriented nanorods directly grown on transparent conducting oxide (TCO) substrates are finding a lot interest solar photovoltaics and several other devices enhanced electron transport lower exciton recombination rates. However, the growth highly oriented, different understanding interplay between surface chemistry mechanism...

The optical and structural properties of hybrid perovskites can be tuned by the post-synthetic introduction new cations. To advance development this approach, knowledge reaction mechanism is essential, but has not yet been elucidated. Here, effect n-octylamine on three-dimensional (3D) methylammonium lead bromide (MAPbBr3) was investigated in situ X-ray photoelectron spectroscopy. Spectroscopic analysis indicated equimolar substitutions between octylammonium (OcA+) (MA+) cations that cause...

The syntheses of gold nanoparticles (Au NPs) and quantum clusters QCs) that employ cefadroxil (CFX; an antibiotic) as both reducing capping agents are reported. HAuCl4 /CFX concentration, temperature, pH crucial factors in the modulation nucleation growth kinetics reaction, consequently, guiding size morphology as-synthesized Au NPs. Interesting results observed if reaction is performed under different conditions. TEM analysis NPs synthesized at 6 shows average particle approximately 2 nm...

One‐step synthesis and deposition of nickel oxide quantum dots using a gas‐phase microplasma process is demonstrated their applicability as transport layer for solar cell devices shown. The uses solid metal wire sacrificial electrode, the concentration oxygen gas required in investigated. are characterized physical, chemical, optical properties critical parameters such throughput also estimated. Direct one‐step directly on perovskite cells carried out computer‐controlled x – y stage...

<bold>Sticky perovskites!</bold> PM-IRRAS evidences that even simple fluorocarbons stick flat to methylammonium lead iodide hybrid perovskites and modify their properties.

Abstract Methylammonium lead iodide perovskite (MAPbI 3 ), a prototype material for potentially high‐efficient and low‐cost organic–inorganic hybrid solar cells, has been investigated intensively in recent years. A study of low‐energy electron‐induced transformations MAPbI is presented, performed by combining controlled electron‐impact irradiation with X‐ray photoelectron spectroscopy scanning electron microscopy. Changes were observed both the elemental composition morphology irradiated...

Herein, we investigated the impact of polymorphism

Correction for ‘Unexpected surface interactions between fluorocarbons and hybrid organic inorganic perovskites evidenced by PM-IRRAS their application towards tuning the potential' Subha Sadhu <italic>et al.</italic>, <italic>Mater. Horiz.</italic>, 2019, DOI: 10.1039/c8mh01119b.

Perovskites in general are known to possess ionic conductivity and ion movement has been postulated be directly or indirectly responsible for their lack of long-term stability unusual behavior, including hysteresis. Therefore, understanding migration perovskites is major importance improving performance. Ion HOIPs may occur extrinsically, i.e. from one the contacts, take form migration, where an displaced occupied a vacant site. Numerous studies confirmed rotational MA ions within inorganic...