Anionic vacancy-dependent activity of the CoSe2 with a tunable interfacial electronic structure on the N-doped carbon cloth for advanced Li–O2 batteries

2020 ◽  
Vol 8 (32) ◽  
pp. 16636-16648
Author(s):  
Zhiqian Hou ◽  
Chaozhu Shu ◽  
Ruixin Zheng ◽  
Chunhai Liu ◽  
Zhiqun Ran ◽  
...  
Keyword(s):  
Energy Efficiency ◽  
Electronic Structure ◽  
State Of The Art ◽  
Anionic Vacancy ◽  
Carbon Cloth ◽  
Interfacial Electronic Structure ◽  
Lithium Peroxide ◽  
Dependent Activity

The inferior reversibility of the formation/decomposition of the lithium peroxide (Li2O2) and its insolubility and insulation features result in poor energy efficiency and limited durability of state-of-the-art Li–O2 batteries.

scholarly journals Interfacial electronic structure at rubrene/NiFe heterostructure

2021 ◽  
pp. 104692
Author(s):  
Pan Yuan ◽  
Yuquan Liu ◽  
Haipeng Xie ◽  
Junhua Wei ◽  
Yuan Zhao ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Interfacial Electronic Structure

scholarly journals A State of the Art of the Overall Energy Efficiency of Wood Buildings—An Overview and Future Possibilities

Materials ◽  
2021 ◽  
Vol 14 (8) ◽  
pp. 1848
Author(s):  
Matheus Roberto Cabral ◽  
Pierre Blanchet
Keyword(s):  
Energy Efficiency ◽  
State Of The Art ◽  
Energy Performance ◽  
Environmental Benefits ◽  
Embodied Energy ◽  
Future Research ◽  
Hybrid Buildings ◽  
Wood Frame ◽  
Mass Timber

The main goal of this study was to review current studies on the state of the art of wood constructions with a particular focus on energy efficiency, which could serve as a valuable source of information for both industry and scholars. This review begins with an overview of the role of materials in wood buildings to improve energy performance, covering structural and insulation materials that have already been successfully used in the market for general applications over the years. Subsequently, studies of different wood building systems (i.e., wood-frame, post-and-beam, mass timber and hybrid constructions) and energy efficiency are discussed. This is followed by a brief introduction to strategies to increase the energy efficiency of constructions. Finally, remarks and future research opportunities for wood buildings are highlighted. Some general recommendations for developing more energy-efficient wood buildings are identified in the literature and discussed. There is a lack of emerging construction concepts for wood-frame and post-and-beam buildings and a lack of design codes and specifications for mass timber and hybrid buildings. From the perspective of the potential environmental benefits of these systems as a whole, and their effects on energy efficiency and embodied energy in constructions, there are barriers that need to be considered in the future.

scholarly journals A Study of Interfacial Electronic Structure at the CuPc/CsPbI2Br Interface

Crystals ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 547
Author(s):  
Zengguang Tang ◽  
Liujiang Zhang ◽  
Zhenhuang Su ◽  
Zhen Wang ◽  
Li Chen ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Molecular Orbital ◽  
Photoelectron Spectroscopy ◽  
High Performance ◽  
Energy Gap ◽  
Hole Transport ◽  
Hole Injection ◽  
Band Bending ◽  
Valance Band Maximum ◽  
Interfacial Electronic Structure

In this article, CsPbI2Br perovskite thin films were spin-coated on FTO, on which CuPc was deposited by thermal evaporation. The electronic structure at the CsPbI2Br/CuPc interface was examined during the CuPc deposition by in situ X-ray photoelectron spectroscopy (XPS) and ultraviolet photoelectron spectroscopy (UPS) measurements. No downward band bending was resolved at the CsPbI2Br side, whereas there is ~0.23 eV upward band bending as well as a dipole of ~0.08 eV identified at the molecular side. Although the hole injection barrier as indicated by the energy gap from CsPbI2Br valance band maximum (VBM) to CuPc highest occupied molecular orbital (HOMO) was estimated to be ~0.26 eV, favoring hole extraction from CsPbI2Br to CuPc, the electron blocking barrier of ~0.04 eV as indicated by the offset between CsPbI2Br conduction band minimum (CBM) and CuPc lowest unoccupied molecular orbital (LUMO) is too small to efficiently block electron transfer. Therefore, the present experimental study implies that CuPc may not be a promising hole transport material for high-performance solar cells using CsPbI2Br as active layer.

Interfacial Electronic Structure of the Dipolar Vanadyl Naphthalocyanine on Au(111): “Push-Back” vs Dipolar Effects

2011 ◽  
Vol 115 (43) ◽  
pp. 21128-21138 ◽  
Author(s):  
Aleksandrs Terentjevs ◽  
Mary P. Steele ◽  
Michael L. Blumenfeld ◽  
Nahid Ilyas ◽  
Leah L. Kelly ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Interfacial Electronic Structure

scholarly journals Cooperative UAV Scheme for Enhancing Video Transmission and Global Network Energy Efficiency

Sensors ◽  
2018 ◽  
Vol 18 (12) ◽  
pp. 4155 ◽  
Author(s):  
Pedro Cumino ◽  
Wellington Lobato Junior ◽  
Thais Tavares ◽  
Hugo Santos ◽  
Denis Rosário ◽  
...  
Keyword(s):  
Energy Efficiency ◽  
Energy Consumption ◽  
Video Transmission ◽  
State Of The Art ◽  
Premature Death ◽  
Global Network ◽  
Quality Level ◽  
Network Partitioning ◽  
Long Period ◽  
The Impact

Collaboration between multiple Unmanned Aerial Vehicles (UAVs) to set up a Flying Ad Hoc Network (FANET) is a growing trend since future applications claim for more autonomous and rapid deployable systems. The user experience on watching videos transmitted over FANETs should always be satisfactory even under influence of topology changes caused by the energy consumption of UAVs. In addition, the FANET must keep the UAVs cooperating as much as possible during a mission. However, one of the main challenges in FANET is how to mitigate the impact of limited energy resources of UAVs on the FANET operation in order to monitor the environment for a long period of time. In this sense, UAV replacement is required in order to avoid the premature death of nodes, network disconnections, route failures, void areas, and low-quality video transmissions. In addition, decision-making must take into account energy consumption associated with UAV movements, since they are generally quite energy-intensive. This article proposes a cooperative UAV scheme for enhancing video transmission and global energy efficiency called VOEI. The main goal of VOEI is to maintain the video with QoE support while supporting the nodes with a good connectivity quality level and flying for a long period of time. Based on an Software Defined Network (SDN) paradigm, the VOEI assumes the existence of a centrailized controller node to compute reliable and energy-efficiency routes, as well as detects the appropriate moment for UAV replacement by considering global FANET context information to provide energy-efficiency operations. Based on simulation results, we conclude that VOEI can effectively mitigate the energy challenges of FANET, since it provides energy-efficiency operations, avoiding network death, route failure, and void area, as well as network partitioning compared to state-of-the-art algorithm. In addition, VOEI delivers videos with suitable Quality of Experience (QoE) to end-users at any time, which is not achieved by the state-of-the-art algorithm.

Interfacial electronic structure of copper phthalocyanine and copper hexadecafluorophthalocyanine studied by photoemission

2006 ◽  
Vol 88 (17) ◽  
pp. 173513 ◽  
Author(s):  
K. M. Lau ◽  
J. X. Tang ◽  
H. Y. Sun ◽  
C. S. Lee ◽  
S. T. Lee ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Copper Phthalocyanine ◽  
Interfacial Electronic Structure

State-of-the-art eigensolvers for electronic structure calculations of large scale nano-systems

2008 ◽  
Vol 227 (15) ◽  
pp. 7113-7124 ◽  
Author(s):  
Christof Vömel ◽  
Stanimire Z. Tomov ◽  
Osni A. Marques ◽  
A. Canning ◽  
Lin-Wang Wang ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Large Scale ◽  
State Of The Art ◽  
Electronic Structure Calculations ◽  
Structure Calculations
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