Results 41 to 50 of about 5,244,411 (250)

Single‐Chromophore Homojunction Organic Solar Cells: A Path to Simplicity and Efficiency

Advanced Materials, EarlyView.
This perspective discusses how the intrinsic optoelectronic properties of organic semiconductors, their molecular packing in the solid‐state, and internal energetic gradients within a device can enable free‐charge carrier generation in homojunction organic solar cells.
Shaun McAnally, Paul L. Burn, Paul E. Shaw   +2 more
wiley   +1 more source

The sequence and productivity of Setswana verbal suffixes

Stellenbosch Papers in Linguistics Plus, 2014
Setswana is an agglutinative language with a rich verbal morphology, allowing for an elaborate system of verbal inflection. Until now, research on Setswana verbal morphology has largely been based on qualitative methods.
Pretorius, Rigardt
doaj   +1 more source

Frequency reconfigurable microstrip patch-slot antenna with directional radiation pattern [PDF]

, 2014
In this paper, frequency reconfigurable slot-patch antenna with reflector at the back of an antenna is presented. The proposed antenna consists of a microstrip patch antenna and a microstrip slot antenna where the slot antenna is positioned at the ground
A. Rahim, Mohamad Kamal, A. Hamid, Mohamad Rijal, Ismail, Muhammad Faizal, Majid, H. A.   +3 more
core   +1 more source

Self‐Assembled Monolayers in p–i–n Perovskite Solar Cells: Molecular Design, Interfacial Engineering, and Machine Learning–Accelerated Material Discovery

Advanced Materials, EarlyView.
This review highlights the role of self‐assembled monolayers (SAMs) in perovskite solar cells, covering molecular engineering, multifunctional interface regulation, machine learning (ML) accelerated discovery, advanced device architectures, and pathways toward scalable fabrication and commercialization for high‐efficiency and stable single‐junction and
Asmat Ullah, Ying Luo, Stefaan De Wolf
wiley   +1 more source

Technology Assessment of Aperture Coupled Slot Antenna Array in Groove Gapwaveguide for 5G Millimeter Wave Applications

IEEE Access, 2021
A compact triple-layer series fed slot unit array using Groove Gap Waveguide (GGW) technology for 5G millimeter-wave applications is presented in this paper. The design employed a two-step coupling mechanism for the radiating slots. The aperture coupling
Ivan Zhou, Lluis Jofre, Jordi Romeu
doaj   +1 more source

Wideband Wide Scan Unit-Cell of a Connected Slot Array for SatCom Applications

, 2023
International audienceThis work introduces an improved wideband unit-cell for a connected slot array backed by a ground plane and loaded with artificial dielectric layers (ADLs). The unit-cell design includes a detailed feeding system for a single linear
Contreres, Romain, Ettorre, Mauro, Sauleau, Ronan, Maggi, Mattia, Fragnier, Rémi   +4 more
core   +1 more source

Toward Pore‐Engineered 3D‐Printed Materials for Sorption Water Harvesting, Interfacial Evaporation, and Radiative Cooling

Advanced Materials, EarlyView.
Water harvesting, radiative cooling, and interfacial solar evaporation are fundamentally governed by coupled heat, mass, and light transport processes. These processes are mediated by pore architecture, including pore size, connectivity, and hierarchical organization.
Dejan J. Trajkovski, Higgins M. Wilson, Abdallah Y. M. Ali, Jiaxing Xu, Ruzhu Wang, Primož Poredoš   +5 more
wiley   +1 more source

Novel Polyimide-Based Conformal Bandpass FSS for X-band RADAR Communications

Journal of High-Frequency Communication Technologies
A linearly polarized wide bandpass frequency selective surface (FSS) for RADAR communication application has been presented.  The proposed FSS is constructed in a single layer with a size of 0.25 λ0.
Geethanjali Govindarajan, Preetha Purusothaman   +1 more
doaj   +1 more source

Active Frequency Selective Surface With Wide Reconfigurable Passband

IEEE Access, 2019
This paper presents an active frequency selective surface (AFSS) with a wide reconfigurable passband. The tuning mechanism was investigated with an equivalent circuit which consists of a parallel L-C resonant circuit and a series L-C resonant circuit.
Qingxin Guo, Zengrui Li, Jianxun Su, Jiming Song, Lamar Y. Yang   +4 more
doaj   +1 more source

Simulation and measurement of quasi-optical multipliers [PDF]

, 1999
The lumped-element finite-difference time-domain method is used to analyze quasi-optical multipliers based on diode loaded slot antennas. The method is validated firstly for a passive microstrip-fed structure then for the diode loaded case in both small-
Cryan, MJ, Roselli, L, Helbing, S, Mezzanotte, P, Alimenti, Federico, Roselli, Luca, Sorretino, R, Alimenti, F, Sorrentino, Roberto, Sorrentino, R, Mezzanotte, Paolo, M. Cryan, L., Roselli, F., Alimenti, R., Sorrentino, S. Helbing, P., Mezzanotte, S., Helbing   +17 more
core   +1 more source