The Study of p,n Control of room-temparature Photoluminescence Thin Films

室温光致发光薄膜的p,n控制研究

• 批准号: 15560584
• 负责人: TANAKA Katsumi
• 金额: $ 2.11万
• 依托单位: The University of Electro-Communications
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2003
• 资助国家: 日本
• 起止时间: 2003 至 2004
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-15560584/
• 关键词: Work function; Photoluminescence; P,n Control; Thin films; Kelvin probe; Pulsed laser deposition; CdWO4; Nano Si particles; Si; ゼオライト

Digital Kelvin prove was purchased and the system was attached to our UHV system. The system worked to measure work functions of the samples prepared with pulsed laser deposition. Work functions of the prepared samples can be measured by the charge difference between the probe tip and the sample so called CPD value indirectly. The system needed standard samples, for instance, Au,Ag,and Si whose work functions have been known and their CPD values have to be measured as a function of their work functions. It was found that doped ions in CdWO4 single crystals played significant roles on the charge distribution on their surfaces and therefore unexpectedly large work function values were apparently estimated. Only few results have been reported with digital Kelvin prove so that it is required to distinguish whether the system is measurement possible or not. It should be also considered that large surface area of the probe demands the heterogeneity of the sample surface.In this system, we co … More uld measure the work function measurement on the K/O/Si nanoparticles. It is reported that work function drastically decreases in the system of alkaline/oxygen/Silicon mixture because of negative electron affinity(NEA). So far the smallest work function value of 0.8eV has been reported, however, we could obtain 0.7eV in the K/O/Si nanoparticles. We are expecting that the system could work as one of cold emission materials.Some papers have been published. Ion-doped CdWO4 thin films have been successfully prepared and their PL intensities were drastically enhanced. The effect of laser fluence on the termination of Si species prepared with pulsed laser ablation was reported. The Si species could be encapsulated in zeolite supercages and showed specific PL. The time resolved PL spectra were studied on this system and it was found that Si species encapsulated in zeolite pores shows very short nanoseconds decay time which is quite significant in this system. The discrimination of p-type or n-type is designed to these interesting materials with the present digital Kelvin probe system. Less

购买了数字开尔文，并将系统附加到UHV系统上。所需的样本是按照其工作函数的函数来测量的很少有人被证明是为了区分系统是可能的，也可以将其视为样品表面异质性的表面积。由于负电子亲和力（NEA），对K/O/Si纳米型的测量大大降低了碱/牛的。我们期望该系统的纳米颗粒可以发表，并宣布其PL强度大大增强。封装在沸石超级元素中，并在该系统上研究了特定的PL光谱，并发现封装在沸石孔中的Si物种显示出非常短的纳秒衰减时间，这在系统中非常重要。 -type旨在使用Pressent Elvin探针系统的有趣材料

项目成果

Time-resolved Photoluminescence on ion doped CdWO_4 Thin Films Prepared with Pulsed Laser Deposition

脉冲激光沉积离子掺杂CdWO_4薄膜的时间分辨光致发光

• 发表时间: 2004
• 期刊: J.Appl.Phys. 95
• 作者: K.Tanaka;S.Suzuki;C-K.Choo
• 通讯作者: C-K.Choo

Photoluminescence Intensity Enhancement on Ion-doped CdWO_4 Thin Films Prepared with Prepared Laser Deposition

制备激光沉积制备的离子掺杂CdWO_4薄膜的光致发光强度增强

• 发表时间: 2004
• 期刊: Thin Solid Films 458
• 作者: C-K.Choo;S.Suzuki;K.Tanaka
• 通讯作者: K.Tanaka

K.Tanaka, S.Suzuki, C-K.Choo: "Time-resolved photoluminescence on samarium, nickel, and cesium ion doped scintillator CdWO4(010) single crystal surfaces"Journal of Applied Physics. Vol.95, No.3. 1287-1293 (2004)

K.Tanaka、S.Suzuki、C-K.Choo：“钐、镍和铯离子掺杂闪烁体 CdWO4(010) 单晶表面的时间分辨光致发光”应用物理学杂志。

Time-Resolved Photoluminescence Spectra of Si Species Encapsulated in Zeolite Supercages

封装在沸石超级笼中的硅物质的时间分辨光致发光光谱

• 发表时间: 2005
• 期刊: Journal of Physical Chemistry B 109
• 作者: K.Tanaka;Y.Komatsu;C-K Choo
• 通讯作者: C-K Choo

Time-resolved photoluminescence on samarium, nickel, and cesium ion doped scintillator CdWO4(010) single crystal surfaces

钐、镍和铯离子掺杂闪烁体 CdWO4(010) 单晶表面的时间分辨光致发光

• 发表时间: 2004
• 期刊: Journal of Applied Physics 95
• 作者: K.Tanaka;S.Suzuki;C-K.Choo
• 通讯作者: C-K.Choo