Development of Organic Semiconductor Lasers with Self-organized Low-dimensional Crystals of π-Conjugated Oligomers

π共轭低聚物自组织低维晶体有机半导体激光器的研制

• 批准号: 14350498
• 负责人: YANAGI Hisao
• 金额: $ 5.31万
• 依托单位: Kobe University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2002
• 资助国家: 日本
• 起止时间: 2002 至 2003
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-14350498/
• 关键词: Self-organization; π-Conjugated oligomer; Low-dimensional crystals; Organic semiconductor laser; Organic electroluminescence; Field effect transistor; 電界効果型トランジスタ

This study was carried out to realize organic semiconductor lasers using self-organized low-dimensional crystals of π-conjugated oligomers based on their confinement effects of excitons and light. The results are summarized as follows.(1) Development of laser dye moleculesWe found that π-conjugated linear oligomers of distyrylbenzene derivatives, thiophene and p-phenylene are promising as stable lasing materials with good emission efficiency under high current injection.(2) Fabrication of self-organized low-dimensional crystalsThe self-organized low-dimensional crystals were successfully prepared by vapor-deposition of the above oligomers onto the (100) surface of a KCl single-crystal substrate. The oligomer of the distyrylbenzene derivative was self-olganized in dotlike morphology of 1-10 μm in diameter. The tiophene/phenylene co-oligomers grew in epitaxially oriented rodlike crystals.(3) Optically pumped light amplification phenomena of self-organized low-dimensional crystalsThe self … More -organized microdots and epitaxially oriented rodlike crystals were optically pumped by a pulsed excition laser and their photoluminescence spectra were observed. The emitted light was confined in these low-dimensional crystals and gain-narrowed by their microcavity and self-waveguiding effects resulting in the amplified spontaneous emisson (ASE) with a band width of several nanometers. Furthermore,by changing the excitation wavelengths, unusually narrowed emission (band width < 0.5 nm) related to the Raman scattering process was obtained. It was assigned as the stimulated resonance Raman scattering that was indicative of polaritonic interaction between the emitted light and the excitons localized at a specific molecular vibration mode.(4) Current injection characteristics of FET devices fabricated with self-organized low-dimensional crystalsCarrier injection and transport properties of field effect transistors fabricated with the self-organized low-dimensional crystals were measured. The highest hole mobility, 0.015 cm2V-1s-1, was obtained from the epitaxially oriented crystals of the thiophene/phenylene co-oligomer. It suggests that the crystal orientation with respect to the channel direction is important to improve the carrier transport efficiency. Less

本研究利用低维π共轭低聚物晶体对激子和光的限制效应，实现有机半导体激光器。结果总结如下。(1)激光染料分子的发展我们发现，二苯乙烯基苯衍生物、噻吩和对苯撑的π共轭线性低聚物是很有希望的稳定的激光材料，在高电流注入下具有良好的发射效率。(2)自组装低维晶体的制备将上述低聚物气相沉积到KCl单晶衬底的（100）表面上，成功地制备了自组装低维晶体。二苯乙烯基苯衍生物的低聚物以直径1-10 μm的点状形态自组装。钛/亚苯基共低聚物以外延取向的棒状晶体生长。(3)自组织低维晶体的光泵浦光放大现象 ...更多信息 用脉冲激发激光光抽运有序的微粒和外延生长的棒状晶体，观察了它们的光致发光谱。发射的光被限制在这些低维晶体中，并通过它们的微腔和自波导效应使增益变窄，从而产生带宽为几纳米的放大自发辐射（ASE）。此外，通过改变激发波长，获得了与拉曼散射过程相关的异常窄的发射（带宽< 0.5 nm）。它被指定为受激共振拉曼散射，这是指示的极化激元之间的相互作用的发射光和激子定位在一个特定的分子振动模式。(4)自组织低维晶体场效应晶体管的电流注入特性测量了自组织低维晶体场效应晶体管的载流子注入和输运特性。最高的空穴迁移率，0.015 cm ~ 2 V ~（-1）s ~（-1），从噻吩/苯共聚低聚物的外延取向晶体获得。这表明，相对于沟道方向的晶体取向是重要的，以提高载流子输运效率。少

项目成果

Hisao Yanagi: "Stimulated Resonsance Raman Scattering from Single Crystals of a Thiophene/Phenylene Co-Oligomer."Applied Physics Letters. 第83巻・第10号. 1941-1943 (2003)

Hisao Yanagi：“噻吩/亚苯基共聚低聚物单晶的受激共振拉曼散射”，《应用物理快报》第 83 卷，第 10 期，1941-1943 年（2003 年）

Hisao Yanagi: "Fluorescent Crystallization of Isomeric Quinolyne-Capped Thiophene Oligomer in Thin Films Grown by Hot-Wall Epitaxy."The Journal of Physical Chemistry, B. 第107巻・第44号. 12201-12205 (2003)

Hisao Yanagi：“热壁外延生长薄膜中异构喹啉封端噻吩低聚物的荧光结晶。”《物理化学杂志》，B. 第 107 卷，第 44 期。12201-12205 (2003)

Yoshio Taniguchi: "Organic Solid-State Laser"Extended Abstracts of the 21st Electronic Materials Symposium. 173-174 (2002)

Yoshio Taniguchi：《有机固体激光器》第21届电子材料研讨会扩展摘要。

Michifumi Nagawa: "Emission Gain Narrowing from Single Crystals of a Thiophene/Phenylene Co-oligomer."Applied Physics Letters. 第80巻・第4号. 544-546 (2002)

Michifumi Nakawa：“噻吩/亚苯基低聚物单晶的发射增益变窄”，《应用物理快报》第 80 卷，第 4 期。544-546 (2002)

Michifumi Nagawa: "Emission Gain Narrowing from Single Crystals of a Thiophene/Phenylene Co-oligomer"Applied Physics Letters. 80-4. 544-546 (2002)

名川道文：“噻吩/亚苯基共聚低聚物单晶的发射增益变窄”应用物理快报。