Results 121 to 130 of about 78,934 (289)

Optical Calibration of a Multi-Color Ellipsometric Mapping Tool Fabricated Using Cheap Parts

Photonics
We developed and applied a new calibration method to make more accurate measurements with our multi-color ellipsometric mapping tool made from cheap parts.
Berhane Nugusse Zereay, Sándor Kálvin, György Juhász, Csaba Major, Péter Petrik, Zoltán György Horváth, Miklós Fried   +6 more
doaj   +1 more source

Charge‐Acoustic Phonon Coupling Determined Carrier Transport Properties in FAxMA1−xPbBr3 Perovskite Single Crystals

Advanced Science, EarlyView.
This study investigates acoustic phonon‑carrier coupling in FAxMA1−xPbBr3 single crystals using time‑domain Brillouin scattering. The results show that increasing the FA content in FAxMA1−xPbBr3 single crystal reduces both the elastic constant and the intrinsic carrier mobility governed by the acoustic phonon‑carrier coupling.
Wei Zhang, Zheng Zou, Tiehui Wu, Zijie Xiao, Dan Feng, Jianbin Zhong, Xianshao Zou, Ningjiu Zhao   +7 more
wiley   +1 more source

Ion Charge Compensation upon Electrochemical Doping of Redox Polymer Films with Tunable Crosslinking Density

Advanced Electronic Materials, EarlyView.
The electrochemical doping of redox homo‐ and copolymers containing triphenylamine (TPA) as redox‐active units is reported. Electrochemical crosslinking leads to films with tetraphenylbenzidine (TPB) crosslinking units. Advanced electrogravimetric tools are applied to get insights into their mixed ionic‐electronic conducting characteristics: anion ...
Claudia Malacrida, Klaus Dirnberger, El Mahdi Halim, Ozlem Sel, Hubert Perrot, Sabine Ludwigs   +5 more
wiley   +1 more source

Integrated Optoelectronic Model to Predict the External Quantum Efficiency of Single‐Layer TADF Organic Light‐Emitting Diodes

Advanced Electronic Materials, EarlyView.
An experimentally validated optoelectronic device model is presented to describe the efficiency and roll‐off behavior of single‐layer TADF OLEDs. By coupling charge transport, exciton dynamics, and optical outcoupling, the model reproduces the External Quantum Efficiency (EQE) across different emission layer thicknesses and temperatures, offering ...
Jawid Nikan, Kaiwen Guo, Yungui Li, Paul W. M. Blom, Gert‐Jan A. H. Wetzelaer   +4 more
wiley   +1 more source

Role of Rare‐Earth Lanthanum Doping on Electrical Performance and Stability of Atomic Layer Deposition Processed Indium Oxide Thin‐Film Transistors

Advanced Electronic Materials, EarlyView.
The work demonstrates La doping in In2O3 via ALD super‐cycles. The strong La─O bond suppresses oxygen vacancies, resulting in a decrease in mobility and a positive shift in threshold voltage. The effective suppression of VO decreases oxygen‐related defects under gate bias, leading to exceptional negative bias stability.
Jinxiu Zhao, Zhiyu Lin, Ziheng Wang, Liankai Zheng, Kai Jiang, Haoran Zhao, Mengwei Si   +6 more
wiley   +1 more source

Optical properties of In2O3 from experiment and first-principles theory: influence of lattice screening

New Journal of Physics, 2018
The framework of many-body perturbation theory led to deep insight into electronic structure and optical properties of diverse systems and, in particular, many semiconductors.
André Schleife, Maciej D Neumann, Norbert Esser, Zbigniew Galazka, Alexander Gottwald, Jakob Nixdorf, Rüdiger Goldhahn, Martin Feneberg   +7 more
doaj   +1 more source

Enabling Long Term, Shelf‐Stable Perovskite Solar Cells: Alumina Barriers to Protect Perovskite Devices from Moisture and Oxygen

Advanced Energy Materials, EarlyView.
This study reports a packaging strategy for perovskite photovoltaic devices using atomic layer deposition (ALD) of aluminum oxide. Through optimization of deposition temperature and oxidant chemistry, researchers develop a 50 nm barrier layer with superior water vapor (WVTR) and oxygen transmission rates (OTR).
Melissa A. Davis, Kelly Schutt, Duong Nguyen Minh, Xinwen Zhang, Chenchao Xie, Ross A. Kerner, Tianran Liu, Matthew O. Reese, Laura T. Schelhas, Michael D. Kempe, Axel F. Palmstrom, Joseph M. Luther   +11 more
wiley   +1 more source

Structure and Spectroscopic Characterisation of Phenanthroline‐Based Iodobismuthate(III) Complexes Utilised for Raw Acoustic Signal Classification

Advanced Intelligent Discovery, EarlyView.
Memristors based on trimethylsulfonium (phenanthroline)tetraiodobismuthate have been utilised as a nonlinear node in a delayed feedback reservoir. This system allowed an efficient classification of acoustic signals, namely differentiation of vocalisation of the brushtail possum (Trichosurus vulpecula).
Ewelina Cechosz, Gisya Abdi, Andrzej Sławek, Marlena Gryl, Konrad Szaciłowski   +4 more
wiley   +1 more source

A new technique for oil backstreaming contamination measurements [PDF]

Due to the large size and the number of diffusion pumps, space simulation chambers cannot be easily calibrated by the usual test dome method for measuring backstreaming from oil diffusion pumps.
Alterovitz, S. A., Drotos, M. N., Dunning, J. E., Sieg, R. M., Speier, H. J.   +4 more
core   +1 more source

Ultrafast Control of Coherent Acoustic Lattice Dynamics in the Transition Metal Dichalcogenide Alloy WSSe

Advanced Physics Research, EarlyView.
Coherent acoustic phonons are generated and optically controlled in bulk WSSe alloy samples using ultrafast spectroscopy. The alloy exhibits a strong coherent acoustic response, which is not an intermediate state between WS? and WSe?. Instead, a much more complex mechanism is proposed.
Sergio I. Rey, Martin J. Cross, Malte L. Welsch, Frederik Schröder, William V. Carstensen, Oleg Semyonov, Daphne M. Dekker, Nikolai Orlov, Binbin Zhou, Nicolas Stenger, Peter U. Jepsen, Edmund J. R. Kelleher   +11 more
wiley   +1 more source