scholarly journals High Performance of Simple Organic Phosphorescence Host-Guest Materials

2020 ◽  
Author(s):  
Yunsheng Wang ◽  
Heqi Gao ◽  
Jie Yang ◽  
Manman Fang ◽  
Dan Ding ◽  
...  
Keyword(s):  
High Performance ◽  
High Efficiency ◽  
Aqueous Media ◽  
Theoretical Research ◽  
Long Afterglow ◽  
Afterglow Time ◽  
New Strategy ◽  
Long Lifetime ◽  
First Time ◽  
Design Guidance

<p><b>The study of purely organic room-temperature phosphorescence (RTP) has drawn </b><b>increasing attention </b><b>because of its considerable theoretical research and practical application </b><b>value</b><b>. Currently, organic RTP materials with both high efficiency (<i>Ф</i><sub>P</sub> > 20%) and a long lifetime (<i>τ</i><sub>P</sub> > 10 s) in air are still </b><b>scarce due to</b><b> the lack of related design guidance. Here, we </b><b>report</b><b> a new strategy to increase the phosphorescence performance of organic materials by integrating the RTP host and RTP guest in one doping system to form </b><b>a </b><b>triplet exciplex. With these materials, the high-contrast </b><b>labelling</b><b> of tumours in living mice and encrypted patterns in thermal printing are both successfully realized for the first time</b><b> by</b><b> taking </b><b>advantage of both</b><b> the long afterglow time (up to 25 min in aqueous media) and high phosphorescence efficiency (43%).</b></p>

scholarly journals High Performance of Simple Organic Phosphorescence Host-Guest Materials

2020 ◽  
Author(s):  
Yunsheng Wang ◽  
Heqi Gao ◽  
Jie Yang ◽  
Manman Fang ◽  
Dan Ding ◽  
...  
Keyword(s):  
High Performance ◽  
High Efficiency ◽  
Aqueous Media ◽  
Theoretical Research ◽  
Long Afterglow ◽  
Afterglow Time ◽  
New Strategy ◽  
Long Lifetime ◽  
First Time ◽  
Design Guidance

<p><b>The study of purely organic room-temperature phosphorescence (RTP) has drawn </b><b>increasing attention </b><b>because of its considerable theoretical research and practical application </b><b>value</b><b>. Currently, organic RTP materials with both high efficiency (<i>Ф</i><sub>P</sub> > 20%) and a long lifetime (<i>τ</i><sub>P</sub> > 10 s) in air are still </b><b>scarce due to</b><b> the lack of related design guidance. Here, we </b><b>report</b><b> a new strategy to increase the phosphorescence performance of organic materials by integrating the RTP host and RTP guest in one doping system to form </b><b>a </b><b>triplet exciplex. With these materials, the high-contrast </b><b>labelling</b><b> of tumours in living mice and encrypted patterns in thermal printing are both successfully realized for the first time</b><b> by</b><b> taking </b><b>advantage of both</b><b> the long afterglow time (up to 25 min in aqueous media) and high phosphorescence efficiency (43%).</b></p>

A high-efficiency N/P co-doped graphene/CNT@porous carbon hybrid matrix as a cathode host for high performance lithium–sulfur batteries

2017 ◽  
Vol 5 (38) ◽  
pp. 20458-20472 ◽  
Author(s):  
Huali Wu ◽  
Li Xia ◽  
Juan Ren ◽  
Qiaoji Zheng ◽  
Chenggang Xu ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
High Performance ◽  
High Efficiency ◽  
One Pot ◽  
Excellent Electrochemical Performance ◽  
Lithium Sulfur Batteries ◽  
Doped Graphene ◽  
First Time ◽  
Co Doped ◽  
Lithium Sulfur

Eco-friendly, multi-heteroatom-doped 3D hybrids were constructed for the first time by one-pot pyrolysis and showed excellent electrochemical performance.

scholarly journals A simple high-performance matrix-free biomass molten carbonate fuel cell without CO2 recirculation

2016 ◽  
Vol 2 (8) ◽  
pp. e1600772 ◽  
Author(s):  
Rong Lan ◽  
Shanwen Tao
Keyword(s):  
Fuel Cell ◽  
High Performance ◽  
High Efficiency ◽  
Molten Carbonate Fuel Cell ◽  
Molten Carbonate ◽  
Performance Matrix ◽  
Molten Carbonate Fuel Cells ◽  
Stable Performance ◽  
First Time ◽  
Matrix Free

In previous reports, flowing CO2 at the cathode is essential for either conventional molten carbonate fuel cells (MCFCs) based on molten carbonate/LiAlO2 electrolytes or matrix-free MCFCs. For the first time, we demonstrate a high-performance matrix-free MCFC without CO2 recirculation. At 800°C, power densities of 430 and 410 mW/cm2 are achieved when biomass—bamboo charcoal and wood, respectively–is used as fuel. At 600°C, a stable performance is observed during the measured 90 hours after the initial degradation. In this MCFC, CO2 is produced at the anode when carbon-containing fuels are used. The produced CO2 then dissolves and diffuses to the cathode to react with oxygen in open air, forming the required CO32− or CO42− ions for continuous operation. The dissolved O2− ions may also take part in the cell reactions. This provides a simple new fuel cell technology to directly convert carbon-containing fuels such as carbon and biomass into electricity with high efficiency.

scholarly journals Green Route for Fabrication of Water-Treatable Thermoelectric Generators

2022 ◽  
Vol 2022 ◽  
pp. 1-12
Author(s):  
Shinichi Hata ◽  
Misaki Shiraishi ◽  
Soichiro Yasuda ◽  
Gergely Juhasz ◽  
Yukou Du ◽  
...  
Keyword(s):  
Thermoelectric Power ◽  
Organic Semiconductors ◽  
Thermoelectric Materials ◽  
High Performance ◽  
High Efficiency ◽  
Aqueous Media ◽  
Maximum Output Power ◽  
Maximum Output ◽  
Thermoelectric Generators ◽  
Green Route

Since future energy harvesting technologies require stable supply and high-efficiency energy conversion, there is an increasing demand for high-performance organic thermoelectric generators (TEGs) based on waterproof thermoelectric materials. The poor stability of n-type organic semiconductors in air and water has proved a roadblock in the development of reliable thermoelectric power generators. We developed a simple green route for preparing n-type carbon nanotubes (CNTs) by doping with cationic surfactants and fabricated films of the doped CNTs using only aqueous media. The thermoelectric properties of the CNT films were investigated in detail. The nanotubes doped using a cationic surfactant (cetyltrimethylammonium chloride (CTAC)) retained an n-doped state for at least 28 days when exposed to water and air, indicating higher stability than that for contemporary CNT-based thermoelectric materials. The wrapping of the surfactant molecules around the CNTs is responsible for blocking oxygen and water from attacking the CNT walls, thus, extending the lifetime of the n-doped state of the CNTs. We also fabricated thermoelectric power conversion modules comprising CTAC-doped (n-type) and sodium dodecylbenzenesulfonate- (SDBS-) doped (p-type) CNTs and tested their stabilities in water. The modules retained 80±2.4% of their initial maximum output power (at a temperature difference of 75°C) after being submerged in water for 30 days, even without any sealing fills to prevent device degradation. The remarkable stability of our CNT-based modules can enable the development of reliable soft electronics for underwater applications.

scholarly journals Hydrogenated Cs2AgBiBr6 for High-Efficient Lead-Free Inorganic Double Perovskite Solar Cell

2021 ◽  
Author(s):  
Zeyu Zhang ◽  
Qingde Sun ◽  
Yue Lu ◽  
Feng Lu ◽  
Xulin Mu ◽  
...  
Keyword(s):  
Solar Cell ◽  
High Performance ◽  
High Efficiency ◽  
Energy Levels ◽  
Perovskite Solar Cells ◽  
Double Perovskite ◽  
Perovskite Solar Cell ◽  
Lead Free ◽  
High Efficient ◽  
New Strategy

Abstract Development of the stable, lead-free inorganic perovskite material is of greatly importance on fabricating the third-generation solar cell. Until now, double perovskite, such as Cs2AgBiBr6, has been proved to be one of the most potential candidates to solve the toxicity and stability issues of traditional lead halide perovskite solar cells (PSCs). However, due to a wide and indirect bandgap of Cs2AgBiBr6 film, its light absorption ability is largely limited and the photoelectronic conversion efficiency (PCE) is normally lower than 2.5%. In this text, by using a hydrogenation method, the bandgap (Eg) of Cs2AgBiBr6 films could be tunable from 2.14 eV to 1.61 eV. At the same time, the highest PCE of hydrogenated Cs2AgBiBr6 perovskite solar cell has been improved more than 150% up to 6.27%. To the best of our knowledge, this is a record high efficiency of Cs2AgBiBr6-based perovskite solar cell. Further investigations confirmed that the interstitial doping of atomic hydrogen (H*) in Cs2AgBiBr6 lattice could not only adjust its valence and conduction band energy levels, but also optimize the carrier mobility from 1.71 cm2V-1s-1 to 9.28 cm2V-1s-1 and enhance the carrier lifetime from 18.85 ns to 41.86 ns. All these works provide a new strategy to fabricate the high performance lead-free inorganic PSCs.

High efficiency and long lifetime fluorescent white organic light-emitting diodes by phosphor sensitization to strategically manage singlet and triplet excitons

2021 ◽  
Vol 9 (10) ◽  
pp. 3626-3634
Author(s):  
Jingwen Yao ◽  
Wei Liu ◽  
Chengwei Lin ◽  
Qian Sun ◽  
Yanfeng Dai ◽  
...  
Keyword(s):  
High Performance ◽  
High Efficiency ◽  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Organic Light ◽  
Exciton Recombination ◽  
Long Lifetime ◽  
Triplet Excitons ◽  
Recombination Zone

The positions of the phosphor-sensitized yellow EML from the exciton recombination zone were controlled to strategically utilize singlet and triplet excitons for blue and yellow emissions to realize high-performance fluorescent WOLEDs.

High-Performance Hardware Interpolation Architecture for High Efficiency Video Coding Decoder

2016 ◽  
Vol 11 (9) ◽  
pp. 764
Author(s):  
Lella Aicha Ayadi ◽  
Nihel Neji ◽  
Hassen Loukil ◽  
Mouhamed Ali Ben Ayed ◽  
Nouri Masmoudi
Keyword(s):  
Video Coding ◽  
High Performance ◽  
High Efficiency ◽  
High Efficiency Video Coding

Superionic Lithium Intercalation through 2 nm x 2 nm Columns in the Crystallographic Shear Phase Nb18W8O69

2019 ◽  
Author(s):  
Kent Griffith ◽  
Clare Grey
Keyword(s):  
High Performance ◽  
Rate Capability ◽  
Block Size ◽  
Lithium Intercalation ◽  
Resonance Spectroscopy ◽  
Complex Metal Oxides ◽  
Battery Electrode ◽  
Crystallographic Shear ◽  
Battery Material ◽  
First Time

Nb18W8O69 (9Nb2O5×8WO3) is the tungsten-rich end-member of the Wadsley–Roth crystallographic shear (cs) structures within the Nb2O5–WO3 series. It has the largest block size of any known, stable Wadsley–Roth phase, comprising 5 ´ 5 units of corner-shared MO6 octahedra between the shear planes, giving rise to 2 nm ´ 2 nm blocks. Rapid lithium intercalation is observed in this new candidate battery material and 7Li pulsed field gradient nuclear magnetic resonance spectroscopy – measured in a battery electrode for the first time at room temperature – reveals superionic lithium conductivity. In addition to its promising rate capability, Nb18W8O69 adds a piece to the larger picture of our understanding of high-performance Wadsley–Roth complex metal oxides.

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