K5B19O31: A Deep‐Ultraviolet Congruent Melting Compound

2019 ◽  
Vol 4 (35) ◽  
pp. 10436-10441 ◽  
Author(s):  
Shuzhao Huang ◽  
Chen Zhou ◽  
Shichao Cheng ◽  
Feng Yu
Keyword(s):  
Congruent Melting ◽  
Melting Compound ◽  
Deep Ultraviolet

Ba2Cd(B3O6)2: A Congruent-Melting Compound with Isolated B3O6Units

2013 ◽  
Vol 639 (6) ◽  
pp. 988-993 ◽  
Author(s):  
Xiaoyu Dong ◽  
Liang Cui ◽  
Yunjing Shi ◽  
Shilie Pan ◽  
Zhongxiang Zhou ◽  
...  
Keyword(s):  
Congruent Melting ◽  
Melting Compound

ChemInform Abstract: Ba2Cd(B3O6)2: A Congruent-Melting Compound with Isolated B3O6Units.

ChemInform ◽  
2013 ◽  
Vol 44 (30) ◽  
pp. no-no
Author(s):  
Zhongxiang Zhou ◽  
et al. et al.
Keyword(s):  
Congruent Melting ◽  
Melting Compound

Synthesis, Crystal Structure, and Characterization of a ­Congruent Melting Compound Magnesium Strontium Diborate MgSrB2O5

2014 ◽  
Vol 640 (8-9) ◽  
pp. 1805-1809 ◽  
Author(s):  
Xinfeng Guo ◽  
Hongping Wu ◽  
Shilie Pan ◽  
Zhihua Yang ◽  
Hongwei Yu ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Congruent Melting ◽  
Melting Compound

CsB4O6F: A Congruent-Melting Deep-Ultraviolet Nonlinear Optical Material by Combining Superior Functional Units

2017 ◽  
Vol 129 (45) ◽  
pp. 14307-14311 ◽  
Author(s):  
Xuefei Wang ◽  
Ying Wang ◽  
Bingbing Zhang ◽  
Fangfang Zhang ◽  
Zhihua Yang ◽  
...  
Keyword(s):  
Nonlinear Optical ◽  
Optical Material ◽  
Nonlinear Optical Material ◽  
Congruent Melting ◽  
Deep Ultraviolet ◽  
Functional Units

ChemInform Abstract: Synthesis, Crystal Structure, and Characterization of a Congruent Melting Compound Magnesium Strontium Diborate MgSrB2O5.

ChemInform ◽  
2014 ◽  
Vol 45 (36) ◽  
pp. no-no
Author(s):  
Xinfeng Guo ◽  
Hongping Wu ◽  
Shilie Pan ◽  
Zhihua Yang ◽  
Hongwei Yu ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Congruent Melting ◽  
Melting Compound

CsB4O6F: A Congruent-Melting Deep-Ultraviolet Nonlinear Optical Material by Combining Superior Functional Units

2017 ◽  
Vol 56 (45) ◽  
pp. 14119-14123 ◽  
Author(s):  
Xuefei Wang ◽  
Ying Wang ◽  
Bingbing Zhang ◽  
Fangfang Zhang ◽  
Zhihua Yang ◽  
...  
Keyword(s):  
Nonlinear Optical ◽  
Optical Material ◽  
Nonlinear Optical Material ◽  
Congruent Melting ◽  
Deep Ultraviolet ◽  
Functional Units

Novel organic, polymeric materials for electronics applications

2002 ◽  
Vol 722 ◽  
Author(s):  
Ram W. Sabnis ◽  
Mary J. Spencer ◽  
Douglas J. Guerrero
Keyword(s):  
Optical Density ◽  
Chemical Vapor ◽  
Polymeric Materials ◽  
Substantial Improvement ◽  
Polymeric Systems ◽  
Patterned Wafers ◽  
Visible Spectra ◽  
Potential Applications ◽  
Deep Ultraviolet ◽  
Deposited Films

AbstractNovel organic, polymeric materials and processes of depositing thin films on electronics substrates by chemical vapor deposition (CVD) have been developed and the lithographic behavior of photoresist coated over these CVD films at deep ultraviolet (DUV) wavelength has been evaluated. The specific monomers synthesized for DUV applications include [2.2](1,4)- naphthalenophane, [2.2](9,10)-anthracenophane and their derivatives which showed remarkable film uniformity on flat wafers and conformality over structured topography wafers, upon polymerization by CVD. The chemical, physical and optical properties of the deposited films have been characterized by measuring parameters such as thickness uniformity, solubility, conformality, adhesion to semiconductor substrates, ultraviolet-visible spectra, optical density, optical constants, defectivity, and resist compatibility. Scanning electron microscope (SEM) photos of cross-sectioned patterned wafers showed verticle profiles with no footing, standing waves or undercut. Resist profiles down to 0.10 νm dense lines and 0.09 νm isolated lines were achieved in initial tests. CVD coatings generated 96-100% conformal films, which is a substantial improvement over commercial spin-on polymeric systems. The light absorbing layers have high optical density at 248 nm and are therefore capable materials for DUV lithography applications. CVD is a potentially useful technology to extend lithography for sub-0.15 νm devices. These films have potential applications in microelectronics, optoelectronics and photonics.

Intrinsic doping limit and defect-assisted luminescence in Cs4PbBr6

2019 ◽  
Author(s):  
Young-Kwang Jung ◽  
Joaquin Calbo ◽  
Ji-Sang Park ◽  
Lucy D. Wahlley ◽  
Sunghyun Kim ◽  
...  
Keyword(s):  
First Principles ◽  
Room Temperature ◽  
Stokes Shift ◽  
Green Luminescence ◽  
Counter Ions ◽  
Self Consistent ◽  
Deep Ultraviolet ◽  
Halide Perovskite ◽  
Related Compounds ◽  
Level Analysis

Cs<sub>4</sub>PbBr<sub>6 </sub>is a member of the halide perovskite family that is built from isolated (zero-dimensional) PbBr<sub>6</sub><sup>4-</sup> octahedra with Cs<sup>+</sup> counter ions. The material exhibits anomalous optoelectronic properties: optical absorption and weak emission in the deep ultraviolet (310 - 375 nm) with efficient luminescence in the green region (~ 540 nm). Several hypotheses have been proposed to explain the giant Stokes shift including: (i) phase impurities; (ii) self-trapped exciton; (iii) defect emission. We explore, using first-principles theory and self-consistent Fermi level analysis, the unusual defect chemistry and physics of Cs<sub>4</sub>PbBr<sub>6</sub>. We find a heavily compensated system where the room-temperature carrier concentrations (< 10<sup>9</sup> cm<sup>-3</sup>) are more than one million times lower than the defect concentrations. We show that the low-energy Br-on-Cs antisite results in the formation of a polybromide (Br<sub>3</sub>) species that can exist in a range of charge states. We further demonstrate from excited-state calculations that tribromide moieties are photoresponsive and can contribute to the observed green luminescence. Photoactivity of polyhalide molecules is expected to be present in other halide perovskite-related compounds where they can influence light absorption and emission. <br>

Intrinsic doping limit and defect-assisted luminescence in Cs4PbBr6

2019 ◽  
Author(s):  
Young-Kwang Jung ◽  
Joaquin Calbo ◽  
Ji-Sang Park ◽  
Lucy D. Wahlley ◽  
Sunghyun Kim ◽  
...  
Keyword(s):  
First Principles ◽  
Room Temperature ◽  
Stokes Shift ◽  
Green Luminescence ◽  
Counter Ions ◽  
Self Consistent ◽  
Deep Ultraviolet ◽  
Halide Perovskite ◽  
Related Compounds ◽  
Level Analysis

Cs<sub>4</sub>PbBr<sub>6 </sub>is a member of the halide perovskite family that is built from isolated (zero-dimensional) PbBr<sub>6</sub><sup>4-</sup> octahedra with Cs<sup>+</sup> counter ions. The material exhibits anomalous optoelectronic properties: optical absorption and weak emission in the deep ultraviolet (310 - 375 nm) with efficient luminescence in the green region (~ 540 nm). Several hypotheses have been proposed to explain the giant Stokes shift including: (i) phase impurities; (ii) self-trapped exciton; (iii) defect emission. We explore, using first-principles theory and self-consistent Fermi level analysis, the unusual defect chemistry and physics of Cs<sub>4</sub>PbBr<sub>6</sub>. We find a heavily compensated system where the room-temperature carrier concentrations (< 10<sup>9</sup> cm<sup>-3</sup>) are more than one million times lower than the defect concentrations. We show that the low-energy Br-on-Cs antisite results in the formation of a polybromide (Br<sub>3</sub>) species that can exist in a range of charge states. We further demonstrate from excited-state calculations that tribromide moieties are photoresponsive and can contribute to the observed green luminescence. Photoactivity of polyhalide molecules is expected to be present in other halide perovskite-related compounds where they can influence light absorption and emission. <br>

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