对MOSFET和DSSC应用的电场对集群的影响:一个DFT研究
1University School of Basic and Applied Sciences, Guru Gobind Singh Indraprastha University, Dwarka Sector-16 C, New Delhi, 110078, India.
Journal of molecular modeling
|November 15, 2023
概括
这项研究探讨了氧化 (HfTiO) 集群,发现电场增强了它们在电子和太阳能电池中的应用特性. 研究确定了适合这些先进技术用途的特定稳定HfTiO集群.
科学领域:
- 计算材料科学 计算材料科学
- 量子化学是一种量子化学.
- 固态物理 固态物理
背景情况:
- 氧化 (HfTiO) 薄膜对于光电子和光伏设备至关重要.
- 了解外部刺激下的集群特性是优化材料性能的关键.
研究的目的:
- 研究HfTiO集群的结构,电子,光学和光谱特性.
- 检查外部电场对这些属性的影响.
- 确定不同Hf:Ti比对集群稳定性和特性的影响.
主要方法:
- 使用密度函数理论 (DFT) 的计算.
- 混合B3LYP功能与LANL2DZ基础集用于地面状态优化和频率计算.
- 时间依赖的DFT形式主义应用于激发状态计算 (50个状态).
- 用于计算研究的Gaussian 16软件包.
主要成果:
- HfTiO集群,特别是Hf2TiO和HfTiO2,具有很高的稳定性和结合能.
- 外部电场减少了HOMO-LUMO间隙,但增加了双极矩,极化性和介电常数.
- 电场应用增强了集群反应性,表明适合用于电催化.
- 紫外线-VIS光谱在电场下显示红移,使得可以从紫外线调整到可见区域.
结论:
- 稳定的HfTiO集群可以使用电场进行工程设计,以增强电子和光学性能.
- 这些修改后的集群显示出对金属氧化物半导体场效应晶体管 (MOSFET) 和染料敏感太阳能电池 (DSSC) 的应用有希望.
- 该研究强调了电场操纵在先进设备中定制HfTiO集群性能方面的潜力.
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