Zero-concentration quenching: a novel Eu3+ based red phosphor with non-layered crystal structure for white LEDs and NaSrY(MoO4)3:Sm3+ based deep-red LEDs for plant growth

2020 ◽  
Vol 49 (27) ◽  
pp. 9239-9253 ◽  
Author(s):  
Marikumar Rajendran ◽  
Sivakumar Vaidyanathan
Keyword(s):  
Crystal Structure ◽  
Plant Growth ◽  
Narrow Band ◽  
Concentration Quenching ◽  
Layered Crystal ◽  
White Led ◽  
Red Phosphor ◽  
White Leds ◽  
Layered Crystal Structure ◽  
Red Leds

Oxide based highly efficient narrow band red emitting phosphors are still a bottleneck in white LED applications.

Narrow band red emitting phosphor with negligible concentration quenching for hybrid white LEDs and plant growth applications

2021 ◽  
Author(s):  
Kasturi Singh ◽  
R. Marikumar ◽  
Rachna Devi ◽  
Sivakumar Vaidyanathan
Keyword(s):  
Plant Growth ◽  
Narrow Band ◽  
Concentration Quenching ◽  
White Led ◽  
White Leds ◽  
Red Emitting Phosphor

¬Narrow band red emitters is the key to solve the problem encountered by the current white LED technology. In this context, a series of new red emitting Li3BaSrLa3¬(MoO4)8:Eu3+ phosphors were...

scholarly journals The layered crystal structure of bis(theophyllinium) hexachloridostannate (IV), C14H18N8O8SnCl6

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Guido J. Reiss ◽  
Maik Wyshusek
Keyword(s):  
Crystal Structure ◽  
Layered Crystal ◽  
Layered Crystal Structure

Abstract C14H18N8O8SnCl6, monoclinic, P21/n (no. 14), a = 8.1810(2) Å, b = 12.6195(3) Å, c = 11.3811(2) Å, β = 90.258(2)°, Z = 2, V = 1174.97(5) Å3, R gt(F) = 0.0266, wR ref = 0.0620, T = 290 K.

Crystal structure of oxybutynin hydrochloride hemihydrate, C22H32NO3Cl(H2O)0.5

2019 ◽  
Vol 34 (1) ◽  
pp. 50-58
Author(s):  
James A. Kaduk ◽  
Nicholas C. Boaz ◽  
Amy M. Gindhart ◽  
Thomas N. Blanton
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Powder Diffraction ◽  
Density Functional ◽  
Hydroxyl Group ◽  
Layered Crystal ◽  
Powder Diffraction File ◽  
X Ray ◽  
Layered Crystal Structure ◽  
Oxybutynin Hydrochloride

The crystal structure of oxybutynin hydrochloride hemihydrate has been solved and refined using synchrotron X-ray powder diffraction data, and optimized using density functional techniques. Oxybutynin hydrochloride hemihydrate crystallizes in space group I2/a (#15) with a = 14.57266(8), b = 8.18550(6), c = 37.16842(26) Å, β = 91.8708(4)°, V = 4421.25(7) Å3, and Z = 8. The compound exhibits X-ray-induced photoreduction of the triple bond. Prominent in the layered crystal structure is the N–H⋅⋅⋅Cl hydrogen bond between the cation and anion, as well as O–H⋅⋅⋅Cl hydrogen bonds from the water molecule and hydroxyl group of the oxybutynin cation. C–H⋅⋅⋅Cl hydrogen bonds also contribute to the crystal energy, and help determine the conformation of the cation. The powder pattern is included in the Powder Diffraction File™ as entry 00-068-1305.

scholarly journals Study of anisotropic thermal conductivity in textured thermoelectric alloys by Raman spectroscopy

RSC Advances ◽  
2021 ◽  
Vol 11 (39) ◽  
pp. 24456-24465
Author(s):  
Rapaka S. C. Bose ◽  
K. Ramesh
Keyword(s):  
Crystal Structure ◽  
Thermal Conductivity ◽  
Raman Spectroscopy ◽  
Transport Properties ◽  
Thermal Transport ◽  
Layered Crystal ◽  
Layered Crystal Structure ◽  
Thermal Transport Properties ◽  
Anisotropic Thermal Conductivity ◽  
P Type

Polycrystalline p-type Sb1.5Bi0.5Te3 (SBT) and n-type Bi2Te2.7Se0.3 (BTS) compounds possessing layered crystal structure show anisotropic electronic and thermal transport properties.

Synthesis, crystal and electronic structure of BaLi2Cd2Ge2

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Sviatoslav Baranets ◽  
Alexander Ovchinnikov ◽  
Svilen Bobev
Keyword(s):  
Crystal Structure ◽  
Electronic Structure ◽  
Fermi Level ◽  
Structure Type ◽  
Layered Crystal ◽  
Electronic Density ◽  
Electronic Band ◽  
Cell Parameters ◽  
Layered Crystal Structure ◽  
Electronic Band Gap

Abstract A new quaternary germanide has been synthesized and structurally characterized. BaLi2Cd2Ge2 adopts the rhombohedral CaCu4P2 structure type (Pearson code hR7; space group R 3 ‾ m $R‾{3}m$ , Z = 3) with unit cell parameters a = 4.5929(6) and c = 26.119(5) Å. Structure refinements from single-crystal X-ray diffraction data demonstrate that the layered crystal structure can be regarded as an ordered quaternary variant of the ternary archetype; structural parallels to layered pnictides and binary germanides can also be drawn. The layered crystal structure is characterized by the absence of direct Ge–Ge and Cd–Cd homoatomic bonds, which suggests that BaLi2Cd2Ge2 should be classified as a Zintl phase, according to the formulation (Ba2+)(Li+)2(Cd2+)2(Ge4−)2. Electronic structure calculations show that the Fermi level crosses a distinct peak in the DOS, although the presence of an electronic band gap or a dip in the electronic density of states at the Fermi level is expected based on the electron partitioning.

A two-dimensional ion-pump of a vanadium pentoxide nanofluidic membrane

2019 ◽  
Vol 7 (17) ◽  
pp. 10552-10560 ◽  
Author(s):  
Raj Kumar Gogoi ◽  
Arindom Bikash Neog ◽  
Tukhar Jyoti Konch ◽  
Neelam Sarmah ◽  
Kalyan Raidongia
Keyword(s):  
Crystal Structure ◽  
Vanadium Pentoxide ◽  
Concentration Gradient ◽  
Layered Crystal ◽  
Ion Pump ◽  
Two Dimensional ◽  
Reactive Surface ◽  
Layered Crystal Structure

The reactive surface and layered crystal structure of vanadium pentoxide (V2O5) are exploited here to prepare a two-dimensional (2D) ion pump that transports ions against their concentration gradient.

Synthesis and warm-white LED applications of an efficient narrow-band red emitting phosphor, Rb2ZrF6:Mn4+

2017 ◽  
Vol 5 (29) ◽  
pp. 7253-7261 ◽  
Author(s):  
L. Y. Wang ◽  
E. H. Song ◽  
Y. Y. Zhou ◽  
T. T. Deng ◽  
S. Ye ◽  
...  
Keyword(s):  
Narrow Band ◽  
Precipitation Method ◽  
White Led ◽  
Red Phosphor ◽  
Yellow Phosphor ◽  
Co Precipitation ◽  
Red Emitting Phosphor

Phosphor Rb2ZrF6:Mn4+has been synthesizedviaa co-precipitation method. Series of WLEDs were fabricated by combining YAG:Ce3+yellow phosphor and different amount of Rb2ZrF6:Mn4+red phosphor with InGaN blue chips.

Wafer-scale synthesis of ultrathin CoO nanosheets with enhanced electrochemical catalytic properties

2017 ◽  
Vol 5 (19) ◽  
pp. 9060-9066 ◽  
Author(s):  
Fei Wang ◽  
Yanhao Yu ◽  
Xin Yin ◽  
Peng Tian ◽  
Xudong Wang
Keyword(s):  
Crystal Structure ◽  
Catalytic Properties ◽  
Grand Challenge ◽  
Layered Crystal ◽  
Two Dimensional ◽  
Large Area ◽  
Wafer Scale ◽  
Layered Crystal Structure ◽  
2D Nanomaterials

Large area synthesis of two dimensional (2D) nanomaterials with a non-layered crystal structure remains a grand challenge.

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