Aluminum Nitride Prepared by Nitridation of Aluminum Oxide Precursors
作者:Edwin Kroke、Lars Loeffler、Fred F. Lange、Ralf Riedel
DOI:10.1111/j.1151-2916.2002.tb00595.x
日期:——
Aluminum nitride (AlN) powders were prepared from the oxide precursors aluminum nitrate, aluminum hydroxide, aluminum 2-ethyl-hexanoate, and aluminum isopropoxide (i.e., Al(NO3)3, Al(OH)3, Al(OH)(O2CCH(C2H5)(C4H9))2, and Al(OCH(CH3)2)3). Pyrolyses were performed in flowing dry NH3 and N2 at 1000°–1500°C. For comparison, the nitride precursors aluminum dimethylamide (Al(N(CH3)2)3) and aluminum trimethylamino
Photoluminescence properties of Pr<sup>3+</sup>, Sm<sup>3+</sup> and Tb<sup>3+</sup> doped SrAlSi<sub>4</sub>N<sub>7</sub> and energy level locations of rare-earth ions in SrAlSi<sub>4</sub>N<sub>7</sub>
作者:Zhi-Jun Zhang、Otmar M. ten Kate、Anneke Delsing、Pieter Dorenbos、Jing-Tai Zhao、Hubertus T. Hintzen
DOI:10.1039/c4tc00538d
日期:——
RE3+ (RE = Pr, Sm, and Tb)-doped SrAlSi4N7 samples were synthesized by a solid-state reaction method at high temperature, and their photoluminescence properties were investigated. It is noticeable that the 5d bands of Pr3+ and Tb3+ are at rather low energy in SrAlSi4N7 compared to oxides. Typical 4f2 → 4f2 emission lines (480–800 nm) of Pr3+ under 4f2 → 4f15d1 excitation were observed in Pr3+-doped SrAlSi4N7
通过固相反应法在高温下合成了掺杂RE 3+(RE = Pr,Sm和Tb)的SrAlSi 4 N 7样品,并研究了它们的光致发光性能。值得注意的是,与氧化物相比,在SrAlSi 4 N 7中,Pr 3+和Tb 3+的5d带处于较低的能量。在掺有Pr 3+的SrAlSi 4 N 7中观察到了在4f 2 →4f 1 5d 1激发下典型的Pr 3+的4f 2 →4f 2发射线(480-800 nm)。Sm 3+掺杂的SrAlSi 4 N 7显示出源自4 G 5/2 → 6 H J(J = 5 / 2、7 / 2和9/2)跃迁的红色发射,并且在60nm处观察到Sm 3+的电荷转移带。3.98 eV的异常低的能量。掺Tb 3+的样品表现出5 D 3 → 7 F J(J = 6、5、4、3、2、1)(蓝色)和5 D 4 → 7 F J(J在直接Tb 3+ 4f 8 →4f 7 5d 1激发下,在375-650
Luminescent thermal stability and electronic structure of narrow-band green-emitting Sr-Sialon:Eu2+ phosphors for LED/LCD backlights
作者:Weitao Ji、Shuxin Wang、Zhen Song、Quanlin Liu
DOI:10.1016/j.jallcom.2019.07.203
日期:2019.10
Abstract Stable and high-efficiency narrow-band green phosphor is a key component for wide color gamut liquid crystal display (LCD) backlights. In this paper, narrow-bandgreen-emitting Sr3-3xSi13Al3O2N21:3xEu2+ (0.001 ≤ x ≤ 0.09) (Sr-Sialon:Eu2+) phosphor with a full-width at half maximum of 66 nm has been successfully synthesized by using the solid-state reaction method. All the samples are the pure
Electrochemically Prepared Precursors for the Formation of Non‐Oxides
作者:Christian Rüssel、Ralph Zahneisen
DOI:10.1149/1.2221243
日期:1992.9.1
Various metals, such as Ca, Mg, Al, Ti, Cr, Y, Zr, and Ta were anodically dissolved in an organic electrolyte composed of propylamine, acetonitrile, and tetrabutylammonium bromide. The electrode reactions were completely irreversible. At the cathode, the organic amine was reduced to the corresponding anion and gaseous hydrogen, at the anode the metals were oxidized and metal-amino compounds were formed
各种金属,如 Ca、Mg、Al、Ti、Cr、Y、Zr 和 Ta 阳极溶解在由丙胺、乙腈和四丁基溴化铵组成的有机电解质中。电极反应是完全不可逆的。在阴极,有机胺被还原成相应的阴离子和气态氢,在阳极,金属被氧化并形成金属-氨基化合物
GaN–GaN junctions with ultrathin AlN interlayers: Expanding heterojunction design
作者:S. Keller、S. Heikman、L. Shen、I. P. Smorchkova、S. P. DenBaars、U. K. Mishra
DOI:10.1063/1.1484551
日期:2002.6.10
The formation of a two-dimensional electron gas (2DEG) was observed at GaN–GaNjunctions, when an AlN layer of a thickness greater than or equal to 0.5 nm was inserted, and the GaN cap layer was modulation-doped with silicon. No 2DEG was found for undoped samples. When the AlNinterlayer thickness was increased from 0.5 to 1 nm, the electron mobility increased from 720 to 1250 cm2/Vs at 300 K and from