Results 81 to 90 of about 44,300 (311)

Lead‐Free Halide Perovskites for Direct X‐Ray Detectors

Advanced Science, 2023
Lead halide perovskites have made remarkable progress in the field of radiation detection owing to the excellent and unique optoelectronic properties. However, the instability and the toxicity of lead‐based perovskites have greatly hindered its practical
Xiangshun Geng, Yu‐Ang Chen, Yuan‐Yuan Li, Jun Ren, Guan‐Hua Dun, Ken Qin, Zhu Lin, Jiali Peng, He Tian, Yi Yang, Dan Xie, Tian‐Ling Ren   +11 more
doaj   +1 more source

Luminescent Behavior of Sb³⁺-Activated Luminescent Metal Halide

Nanomaterials, 2023
Metal halide perovskites have unparalleled optoelectronic properties and broad application potential and are expected to become the next epoch-making optoelectronic semiconductors.
Tao Huang, Bingsuo Zou
doaj   +1 more source

Dynamic tilting in perovskites

Acta Crystallographica Section A Foundations and Advances, 2023
A new computational analysis of tilt behaviour in perovskites is presented. This includes the development of a computational program – PALAMEDES – to extract tilt angles and the tilt phase from molecular dynamics simulations. The results are used to generate simulated selected-area electron and neutron diffraction patterns which are compared with ...
Handley, C.M., Ward, R.E., Freeman, C.L., Reaney, I.M., Sinclair, D.C., Harding, J.H.   +5 more
openaire   +3 more sources

Orbital Geometry‐Governed Response of Pressure‐Tunable Quantum Defects in hBN

Advanced Functional Materials, EarlyView.
Defects in hBN act as ultrasensitive quantum manometers when the energy of the intradefect optical transitions is modified by lattice compression. The orbital geometry of the electron wave functions governs how electron hopping and Coulomb interactions react uniquely to the reduction of the van der Waals gap and in‐plane compression, leading to robust ...
Magdalena Grzeszczyk, Danis I. Badrtdinov, Kenji Watanabe, Takashi Taniguchi, Cyrus E. Dreyer, Malte Rösner, Maciej Koperski   +6 more
wiley   +1 more source

Electrical Properties of Un-doped and Doped EuTiO3-based Perovskites [PDF]

, 2013
Un-doped and doped EuTiO3 (ET) ceramics were prepared in 5%H2/95%N2 and N2 atmospheres at various temperatures (1350, 1450 and 1500 oC). For un-doped ET, higher pellet density (above 90%) and larger grain sized ceramics were obtained from the higher ...
WANG, JING
core  

Electron-phonon coupling and polaron mobility in hybrid perovskites from first-principles [PDF]

, 2017
Density functional theory electronic structures, maximally localized Wannier funcitons and linear response theory are used to compute the electron and hole mobility of both inorganic, Cs-containing, and hybrid, CH3NH3-containing, lead bromide perovskites.
Carlo Motta, Stefano, Sanvito, Stefano Sanvito, Carlo, Motta   +3 more
core   +1 more source

Ultrasensitive Anti‐Stokes Luminescence Thermometry in Transition Metal Dichalcogenide Monolayers

Advanced Functional Materials, EarlyView.
We demonstrate a highly sensitive nanothermometer using anti‐Stokes photoluminescence, also known as photoluminescence upconversion (UPL), in monolayer tungsten disulfide. A strong resonantly enhanced UPL is observed, confirming the central role of optical phonons in the PL upconversion mechanism.
Sharada Nagarkar, Fahrettin Sarcan, Elanur Hut, Emiliano R. Martins, Stuart A. Cavill, Thomas F. Krauss, Yue Wang   +6 more
wiley   +1 more source

Strain mediated bandgap reduction, light spectrum broadening, and carrier mobility enhancement of methylammonium lead/tin iodide perovskites [PDF]

, 2017
Density functional theory calculations are performed to study the electronic and optical properties of methylammonium lead/tin iodide perovskites under hydrostatic strain.
Wang, Hongxia, Bell, John, Ma, Fengxian, Jiao, Yalong, Du, Aijun   +4 more
core   +1 more source

The classification of 1D `perovskites' [PDF]

, 2021
There has been a huge amount of interest in perovskites recently and new structures of hybrid perovskites are frequently reported. The classification of perovskites has been unambiguous in the discussion of 3D and layered 2D perovskites due to the ...
Wong, Walter Pei De, Grimsdale, Andrew C., Hanna, John V.   +2 more
core   +1 more source

Extremely Long Electron Lifetime in Spontaneously Passivated Polycrystalline Perovskite Layers via Illumination‐Assisted Trap Filling

Advanced Functional Materials, EarlyView.
ABSTRACT Perovskite solar cells (PSCs) are promising next‐generation photovoltaics. The high performance of PSCs is attributed to the long carrier lifetimes of perovskite photoabsorbers. However, the carrier lifetimes of polycrystalline perovskite layers, which serve as the photoabsorbers in practical PSCs, have remained limited to several tens of ...
Naoyuki Nishimura, Ryuzi Katoh, Takurou N. Murakami   +2 more
wiley   +1 more source