Power-dependent photophysical pathways of upconversion in BaTiO3:Er3+

2021 ◽  
Author(s):  
Hyeongyu Bae ◽  
Eunsang Lee ◽  
Kang Taek Lee
Keyword(s):  
Energy Conversion ◽  
Light Emitting ◽  
Efficient Energy

Lanthanide incorporated perovskite is one of the most promising systems for efficient energy conversion or light-emitting materials in terms of upconversion (UC). The photophysical mechanism of UC in the lanthanide-doped...

scholarly journals Dopant-Tunable Ultrathin Transparent Conductive Oxides for Efficient Energy Conversion Devices

2021 ◽  
Vol 13 (1) ◽  
Author(s):  
Dae Yun Kang ◽  
Bo-Hyun Kim ◽  
Tae Ho Lee ◽  
Jae Won Shim ◽  
Sungmin Kim ◽  
...  
Keyword(s):  
Energy Conversion ◽  
Indium Tin Oxide ◽  
Carrier Transport ◽  
Hole Injection ◽  
Visible Range ◽  
Transparent Conductive Oxides ◽  
Light Emitting ◽  
Efficient Energy ◽  
Uv Leds ◽  
Energy Conversion Devices

AbstractUltrathin film-based transparent conductive oxides (TCOs) with a broad work function (WF) tunability are highly demanded for efficient energy conversion devices. However, reducing the film thickness below 50 nm is limited due to rapidly increasing resistance; furthermore, introducing dopants into TCOs such as indium tin oxide (ITO) to reduce the resistance decreases the transparency due to a trade-off between the two quantities. Herein, we demonstrate dopant-tunable ultrathin (≤ 50 nm) TCOs fabricated via electric field-driven metal implantation (m-TCOs; m = Ni, Ag, and Cu) without compromising their innate electrical and optical properties. The m-TCOs exhibit a broad WF variation (0.97 eV), high transmittance in the UV to visible range (89–93% at 365 nm), and low sheet resistance (30–60 Ω cm−2). Experimental and theoretical analyses show that interstitial metal atoms mainly affect the change in the WF without substantial losses in optical transparency. The m-ITOs are employed as anode or cathode electrodes for organic light-emitting diodes (LEDs), inorganic UV LEDs, and organic photovoltaics for their universal use, leading to outstanding performances, even without hole injection layer for OLED through the WF-tailored Ni-ITO. These results verify the proposed m-TCOs enable effective carrier transport and light extraction beyond the limits of traditional TCOs.

Enhanced piezoluminescence in non-stoichiometric ZnS:Cu microparticle based light emitting elastomers

2017 ◽  
Vol 5 (22) ◽  
pp. 5387-5394 ◽  
Author(s):  
Jiayong Gan ◽  
Min Gyu Kang ◽  
Michael A. Meeker ◽  
Giti A. Khodaparast ◽  
Robert J. Bodnar ◽  
...  
Keyword(s):  
Energy Conversion ◽  
Light Emitting ◽  
Sensing Applications ◽  
Photon Sources

Piezoluminescence (PZL), also referred to as mechanoluminescence (ML), is a promising energy conversion mechanism for realizing mechanically driven photon sources including hand-held displays, lighting, bioimaging and sensing applications.

Efficient Energy Conversion in Photochromic Ruthenium DMSO Complexes

2006 ◽  
Vol 45 (15) ◽  
pp. 5953-5960 ◽  
Author(s):  
Aaron A. Rachford ◽  
Jeffrey L. Petersen ◽  
Jeffrey J. Rack
Keyword(s):  
Energy Conversion ◽  
Efficient Energy

scholarly journals Molecular design of two-dimensional perovskite cations for efficient energy cascade in perovskite light-emitting diodes

2021 ◽  
Vol 119 (15) ◽  
pp. 154101
Author(s):  
Nur Fadilah Jamaludin ◽  
Benny Febriansyah ◽  
Yan Fong Ng ◽  
Natalia Yantara ◽  
Mingjie Li ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Molecular Design ◽  
Energy Cascade ◽  
Two Dimensional ◽  
Light Emitting ◽  
Efficient Energy

Micro-scale tearing mode turbulence in the diffusion region during macro-scale evolution of turbulent reconnection

2021 ◽  
Author(s):  
Takuma Nakamura ◽  
Hiroshi Hasegawa ◽  
Tai Phan ◽  
Kevin Genestreti ◽  
Richard Denton ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Energy Conversion ◽  
Magnetic Reconnection ◽  
Diffusion Region ◽  
Electron Diffusion ◽  
Efficient Energy ◽  
Micro Scale ◽  
Island Evolution ◽  
Macro Scale ◽  
Scale Evolution

<p>Magnetic reconnection is a key fundamental process in collisionless plasmas that explosively converts magnetic energy to plasma kinetic and thermal energies through a change of magnetic field topology in an electron-scale central region called the electron diffusion region. Past simulations and observations demonstrated that this process causes efficient energy conversion through the formation of multiple macro-scale or micro-scale magnetic islands/flux ropes. However, how these different spatiotemporal scale phenomena are coupled is still poorly understood. In this study, to investigate the turbulent evolution of magnetic reconnection, we perform a new large-scale fully kinetic simulation of a thin current sheet considering a power-law spectrum of initial fluctuations in the magnetic field as frequently observed in the Earth’s magnetotail. The simulation demonstrates that during a macro-scale evolution of turbulent reconnection, the merging of macro-scale islands results in reduction of the rate of reconnection as well as the aspect ratio of the electron diffusion region. This allows the repeated, quick formation of new electron-scale islands within the electron diffusion region, leading to an efficient energy cascade between macro- and micro-scales. The simulation also demonstrates that a strong electron acceleration/heating occurs during the micro-scale island evolution within the EDR. These new findings indicate the importance of non-steady features of the EDR to comprehensively understand the energy conversion and cascade processes in collisionless reconnection.</p>

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