Synthesis of percolative ZnO quantum-dot superlattices

渗透式 ZnO 量子点超晶格的合成

• 批准号: 23510130
• 负责人: TOYAMA Toshihiko
• 金额: $ 3.49万
• 依托单位: Osaka University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2011
• 资助国家: 日本
• 起止时间: 2011 至 2013
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-23510130/
• 关键词: ナノ材料創製; パーコレーティブ伝導; 液相合成; 量子ドット超格子; コア／シェル構造; 酸化亜鉛; 酸化マグネシウム; パーコレーション転移

We have studied percolative (P-) quantum-dot superlattices (QDSLs) based on the percolation threshold for the formation of QDSLs that are suitable for solution-based fabrication processes. Cross-sectional transmission-electron-microscope measurements revealed the presence of ZnO cores with a mean radius of 2.5 nm that were densely and nearly mono-dispersed in the printed emission layer (EML). Elemental analysis indicated the presence of Mg elements locally around the ZnO cores, suggesting the formation of MgO shells. The blue shifts observed in the transmittance and photoluminescence spectra indicated band gap widening induced by quantum confinement effects. From analysis of the current versus voltage and current versus light intensity characteristics, the formation of the percolative current paths was indicated. Consequently, the structural and optical studies of the EML and the device performance of the light-emitting device demonstrate that the formation of P-QDSLs is possible.

我们研究了基于逾渗阈值的双折射（P-）量子点超晶格（QDSLs）的形成，适用于基于溶液的制造工艺。横截面透射电子显微镜测量揭示了ZnO核心的存在下，具有2.5 nm的平均半径是密集的，几乎单分散在印刷的发光层（EML）。元素分析表明，镁元素的存在下，局部周围的ZnO核心，这表明MgO壳的形成。在透射光谱和光致发光光谱中观察到的蓝移表明量子限制效应引起的带隙加宽。通过对电流-电压特性和电流-光强特性的分析，指出了双折射电流路径的形成。因此，EML的结构和光学研究以及发光器件的器件性能表明P-QDSL的形成是可能的。

项目成果

Optical absorption spectra of P-type Tin monoxide thin films around their indirect fundamental gaps determined using photothermal deflection spectroscopy

• DOI: 10.1016/j.tsf.2013.05.141
• 发表时间: 2014-03
• 期刊: Thin Solid Films
• 影响因子: 2.1
• 作者: T. Toyama;Y. Seo;Takafumi Konishi;H. Okamoto;R. Morimoto;Yuichi Nishikawa;Y. Tsutsumi

「ナノ蛍光体のELデバイスへの応用」、ナノ蛍光体の開発と応用(普及版)、磯辺徹彦監修, 第4章1節

“纳米荧光粉在 EL 器件中的应用”，《纳米荧光粉的开发与应用》（通俗版），矶部哲彦指导，第 4 章第 1 节

• 发表时间: 2012
• 作者: 安立 大輔;外山 利彦
• 通讯作者: 外山 利彦

Top-Emission Ultraviolet-Light-Emitting Diodes Containing Solution-Processed ZnO Nanocrystals

• DOI: 10.1143/apex.4.065005
• 发表时间: 2011-06
• 期刊: Applied Physics Express
• 影响因子: 2.3
• 作者: T. Toyama;H. Kawasaki;Kazuki Itatani;H. Okamoto

Printed Electroluminescent Devices Containing Solution-Processed Zinc-Based Inorganic-Semiconductor Nanocrystals

含有溶液处理的锌基无机半导体纳米晶体的印刷电致发光器件

• 发表时间: 2011
• 作者: 藤本隼平;田村厚夫;Toshihiko Toyama
• 通讯作者: Toshihiko Toyama

Physical Properties of p-Type Tin Monoxide Films Deposited at Low Temperature by Radio Frequency Magnetron Sputtering

• DOI: 10.1143/apex.4.071101
• 发表时间: 2011-06
• 期刊: Applied Physics Express
• 影响因子: 2.3
• 作者: T. Toyama;Y. Seo;Takafumi Konishi;H. Okamoto;Y. Tsutsumi