晶格子恢复和光学激活Yb植入到β-Ga2O3中
Mahwish Sarwar1, Renata Ratajczak2, Vitalii Yu Ivanov1
1Institute of Physics, Polish Academy of Sciences, Al. Lotnikow 32/46, 02-668 Warsaw, Poland.
Materials (Basel, Switzerland)
|August 29, 2024
概括
化恢复了Yb植入的β-Ga2O3的晶格,但Yb扩散限制了有效性. 在这种超宽带间隙半导体中,氧气火对于强烈的Yb发光至关重要.
科学领域:
- 材料科学 材料科学 材料科学
- 半导体物理 半导体物理
- 光电学是指光电子产品.
背景情况:
- β-氧化物 (β-Ga2O3) 是一种超宽带隙半导体,带隙大约为4.8 eV.
- 它是光电子应用的一个有前途的材料,通过稀土兴奋剂可调节的紫外线可见光发射.
- 离子植入是用β-Ga2O3进行兴奋剂的关键技术,可使受控的兴奋剂引入超出可溶性极限,但它会诱导晶格损伤.
研究的目的:
- 在伊特 (Yb) 离子植入后研究 (2 ̄01) 导向β-Ga2O3晶体的晶格恢复.
- 分析植入后冷却温度和大气对晶体结构恢复和Yb光学激活的影响.
- 确定在β-Ga2O3.3中实现强烈Yb发光的最佳条件.
主要方法:
- 在 (2 ̄01) 导向的β-Ga2O3晶体中植入Yb离子的离子植入,其流量为1 × 10^14at/cm^2.
- 在不同温度 (700-900°C) 和不同气氛下进行植入后回火处理.
- 通过麦卡西模拟支持的拉瑟福回散光谱法 (RBS/c) 来评估晶格回收.
- 光学响应测试以评估Yb离子激活和发光.
主要成果:
- 在700-900°C的植入后化导致β-Ga2O3晶格的部分恢复.
- 当回火温度超过800°C超过10分钟时,Yb离子向外扩散到表面.
- 高温植入 (500-900°C) 可以最大限度地减少晶格损伤,但不会导致强烈的Yb发光.
- 氧气回火大气被发现有利于从Yb-dopedβ-Ga2O3.3.中获得强烈的红外发光.
结论:
- 单独的晶格复原不足以在β-Ga2O3.3中产生强烈的室温稀土光发光.
- 优化化条件对于平衡晶格修复和防止多剂外扩散至关重要.
- 富含氧气的回火环境对于增强植入离子β-Ga2O3.3中的Yb发光是必不可少的.
相关概念视频
Crystal Growth: Principles of Crystallization
Crystallization is a phase transformation process in which crystals are precipitated from a supersaturated solution or formed from other sources. During crystallization, atoms or molecules arrange themselves into a well-defined, rigid crystal lattice to minimize energy.
Initiating crystallization involves manipulating the concentration of the solute and the temperature of the solution. Since crystal growth occurs when the ratio of concentration and solubility of the solute in the solvent – the...
Initiating crystallization involves manipulating the concentration of the solute and the temperature of the solution. Since crystal growth occurs when the ratio of concentration and solubility of the solute in the solvent – the...
Lattice Energies of Ionic Crystals
Lattice energy represents the energy released when gaseous cations and anions combine to form an ionic solid, reflecting the strength of electrostatic interactions within the crystal. This process is fundamentally governed by Coulombic attraction between oppositely charged ions, where the potential energy varies inversely with the interionic distance and directly with the product of ionic charges. As ions approach one another, the electrostatic energy becomes increasingly negative, indicating a...


