Results 11 to 20 of about 60,224 (140)

Rooftop and indoor reception with transmit diversity applied to DVB-T networks: A long term measurement campaign [PDF]

, 2009
Although transmit Delay Diversity (DD) can provide a gain in indoor and other Non Line of Sight situations (NLOS), it can introduce degradation in rooftop reception. In fact, when the Ricean K factor of the channel is significantly high (e.g.
Arrinda, A, Bard, M, Bari, RD, Cosmas, J, Ditto, P, Loo, KK, Nilavalan, R   +6 more
core   +1 more source

The Deepest Blue: Major Advances and Challenges in Deep Blue Emitting Quasi‐2D and Nanocrystalline Perovskite LEDs

Advanced Materials, EarlyView.
In this review, the recent development of deep‐blue (≤465 nm) perovskite light‐emitting diodes (PeLEDs) are summarized, using different perovskite nanomaterials, including nanocrystals (NCs), quantum dots (QDs), nanoplatelets (NPLs), quasi‐2D thin film, 3D bulk thin film, as well as lead‐free perovskite nanomaterials.
Pui Kei Ko, Jianchao Ge, Pengbo Ding, Dezhang Chen, Hoi Lam Tammy Tsang, Nitish Kumar, Jonathan E. Halpert   +6 more
wiley   +1 more source

Ultrafast switching of photonic entanglement

, 2011
To deploy and operate a quantum network which utilizes existing telecommunications infrastructure, it is necessary to be able to route entangled photons at high speeds, with minimal loss and signal-band noise, and---most importantly---without disturbing ...
J. B. Altepeter, Joseph B. Altepeter, Matthew A. Hall, Prem Kumar   +3 more
core   +1 more source

Feedforward data-aided phase noise estimation from a DCT basis expansion [PDF]

, 2008
This contribution deals with phase noise estimation from pilot symbols. The phase noise process is approximated by an expansion of discrete cosine transform (DCT) basis functions containing only a few terms.
Bhatti, Jabran, Moeneclaey, Marc
core   +3 more sources

Tribenzyl Organic Cations Carried Multidentate X‐Type Lewis Soft Base for High‐Performance Foldable Perovskite Light‐Emitting Diodes

Advanced Materials, EarlyView.
This study proposes tribenzyl organic cation carried multidentate X‐type Lewis soft base to enhance adhesion and passivate defects simultaneously, aiming to achieve foldable and efficient perovskite nanocrystal‐based light‐emitting diodes. The resulting pure red F‐PeLEDs exhibit a recorded high EQE of 16.2% and robust mechanical properties to endure ...
Benzheng Lyu, Dongyu Li, Chengxuan Ke, Haoquan Liang, Jiayun Sun, Qi Xiong, John Jinwook Kim, Yanning Zhang, Guangfu Luo, Wallace C. H. Choy   +9 more
wiley   +1 more source

Light‐Emitting Diodes Based on Metal Halide Perovskite and Perovskite Related Nanocrystals

Advanced Materials, EarlyView.
The review covers the past and current developments in light‐emitting diodes (LEDs) exploiting nanocrystals of halide perovskites and perovskite‐related materials. The review examines the aspects of material optimizations, device engineering, and applications.
Ying Liu, Zhuangzhuang Ma, Jibin Zhang, Yanni He, Jinfei Dai, Xinjian Li, Zhifeng Shi, Liberato Manna   +7 more
wiley   +1 more source

Analysis of cyclic delay diversity on DVB-H systems over spatially correlated channel [PDF]

, 2007
The objective of this work is to research and analyze the performance of Cyclic Delay Diversity (CDD) with two transmit antenna on DVB-H systems operating in spatially correlated channel. It is shown in this paper that CDD can achieve desirable transmit
Bard, M, Bari, RD, Cosmas, J, Loo, KK, Zhang, Y   +4 more
core   +1 more source

DNA‑Directed Assembly of Photonic Nanomaterials for Diagnostic and Therapeutic Applications

Advanced Materials, EarlyView.
DNA‐directed assembly offers a powerful strategy for constructing structured photonic nanomaterials with precise spatial control. This review provides a comprehensive overview of recent advancements in DNA‐assembled photonic nanomaterials for diagnostics and therapeutics, highlighting key design principles, functionalization strategies, and optical ...
Longjiang Ding, Bing Liu, Andreas Peil, Sisi Fan, Jie Chao, Na Liu   +5 more
wiley   +1 more source

Electrochemical Cell Designs for Efficient Carbon Dioxide Reduction and Water Electrolysis: Status and Perspectives

Advanced Materials, EarlyView.
This review discusses recent innovations in electrochemical CO2 reduction reactions (eCO2RR) and hydrogen evolution reaction cell designs. The latest advancements in in situ cells for operando characterization are also presented. Optimizations in flow patterns, membrane electrode assemblies, electrolyte engineering, and counter‐anodic reactions provide
Zhangsen Chen, Lei Zhang, Shuhui Sun, Gaixia Zhang   +3 more
wiley   +1 more source

Self‐Recovery of Carbonate‐Contaminated Strontium Titanate (100) Vicinal Surfaces Imaged by Tip‐Enhanced Raman Spectroscopy

Advanced Materials Interfaces, EarlyView.
Strontium titanate, a widely used perovskite material, undergoes changes in surface properties under CO2 adsorption. This study demonstrates a self‐regeneration process where strontium carbonate gradually delaminates, leaving a TiO2 termination. The findings, supported by optical near‐field spectroscopy and density functional theory, have broad ...
Mohammad Bakhtbidar, Daniel Gueckelhorn, Marivi Fernández‐Serra, Yon Leandro Leibas López, Alexandre Merlen, Andreas Ruediger   +5 more
wiley   +1 more source