Useful analysis method of angle-resolved ultraviolet photoemission spectra

有用的角分辨紫外光电子发射光谱分析方法

• 批准号: 07640782
• 负责人: HASEGAWA Shinji
• 金额: --
• 依托单位: Okazaki National Research Institutes
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C).
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 无数据
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-07640782/
• 关键词: angle-resolved ultraviolet photoemission spectra; organic thin films; photoelectron scattering; escape depth; 脱出深さ

We measured Angle-resolved ultraviolet photoemission spectra (ARUPS) for the thin films of bis (1,2,5-thiadiazolo)-rho-quinobis (1,3-dithiole) (BTQBT) and naphthacene on HOPG graphite and MoS_2 substrate. Through the quantitative comparison between the observed and calculated take-off angle dependencies of the photoelectron intensities, we succeeded in determining the polar and azimuthal orientations of such large organic molecules. In these calculations, we applied the independent-atomic-center (IAC) approximation which includes the self-scattering of the photoelectrons by the emitting atoms. Further, the measured take-off angle dependence of the full valence-band spectra is compared with the calculated one by considering both the self- and single-scattering. The effect of the phenomenologically induced mean free path of the photoelectrons is also included in the calculation.Our developing calculation program (IAC31) enables us to determine the quantitative molecular orientation in the thin films of the large organic molecules.

用角分辨紫外光电子能谱（ARUPS）研究了双（1，2，5-噻二唑）对苯醌双（1，3-二硫杂环戊烯）（BTQBT）和并四苯在HOPG石墨和MoS_2衬底上形成的薄膜。通过定量比较观察到的和计算出的起飞角的依赖性的光电子强度，我们成功地确定这样的大有机分子的极性和方位角取向。在这些计算中，我们采用独立原子中心（IAC）近似，其中包括发射原子的光电子的自散射。此外，通过考虑自散射和单散射，将测量的全价带谱的起飞角依赖性与计算的起飞角依赖性进行了比较。计算中还考虑了光电子平均自由程的影响，我们开发的计算程序（IAC 31）使我们能够确定有机大分子薄膜中分子取向的定量。

项目成果

Shinji Hasegawa: "Angle-resolved photoemission from oriented thin films of naphthacene : comparison with theoretical spectra" J.Electr.Spectrosc.and Relat.Phen.(in press).

Shinji Hasekawa：“并四苯定向薄膜的角分辨光电子发射：与理论光谱的比较”J.Electr.Spectrosc.and Relat.Phen.（出版中）。

Shinji Hasegawa: "Angle-resolved photoemission from oriented thin films of naphthacene:comparison with theoretical spectra" J. Electr. Spectrosc. and Relat. Phen.(印刷中).

Shinji Hasekawa：“环四苯定向薄膜的角分辨光发射：与理论光谱的比较”J. Spectrosc 和 Relat。

Shinji Hasegawa: "Angle-resolved photoemission from oriented thin films of naphthacene:comparison with theoretical spectra" J.Electr.Spectrosc.and Relat.Phen.印刷中.

Shinji Hasekawa：“并四苯定向薄膜的角分辨光电发射：与理论光谱的比较”J.Electr.Spectrosc.and Relat.Phen.In press。