Low Temperature Photochemical Sol-Gel Processing of Functional Thin Films and their Applications

功能薄膜的低温光化学溶胶-凝胶加工及其应用

• 批准号: 20J40137
• 负责人: 孫 麗娜
• 金额: $ 3.08万
• 依托单位: Yamagata University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for JSPS Fellows
• 财政年份: 2020
• 资助国家: 日本
• 起止时间: 2020-04-24 至 2023-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-20J40137/
• 关键词: flexible electronics; electron injection layer; zinc oxide; metal-organic; solution processing; dielectric material; inverted IOLEDs; Znic-alkoxides; vacuum ultraviolet; photochemical conversion; metal oxide thin films; photoluminescence; thin

The project aims to develop general methodologies for the precise control of functional inorganic thin films in their low temperature solution processing for the realization of roll-to-roll fabrication of flexible electronics. This year, it was found that solution-processed amorphous metal-organic thin film zinc(II) methoxyethoxide (ZME) acts as an efficient and stable electron injection layer (EIL) in inverted organic light-emitting diodes (iOLEDs). In contrast, crystallized ZnO obtained either by utilizing vacuum ultraviolet (VUV) light irradiation or by high temperature annealing caused a strong electron leakage, reducing device efficiency. DC capacitance analysis revealed that ag-ZME has a highly dielectric behavior, allowing it to selectively inject electrons into the LUMO of the organic layer while preventing non-emissive direct reduction of holes. Calcium(II) methoxyethoxide (CME) was also employed as an EIL for comparison and showed nearly the same performance as ZME in iOLEDs, despite its strongly insulating properties. The 4s orbitals of Ca(II) and Zn(II) in ag-CME and ag-ZME are used to regulate the electron injection, these insights offer a new design strategy that uses amorphous dielectric metal-organic thin films as EILs, which may yield high-performance, flexible, and stable electronic devices, such as iOLEDs and perovskite solar cells.

该项目旨在开发在低温溶液处理中精确控制功能无机薄膜的通用方法，以实现柔性电子产品的卷对卷制造。今年，人们发现溶液处理的非晶金属有机薄膜锌（II）甲氧基乙醇盐（ZME）在倒置有机发光二极管（iOLED）中充当有效且稳定的电子注入层（EIL）。与此相反，结晶的ZnO通过利用真空紫外线（VUV）光照射或高温退火引起强烈的电子泄漏，降低器件效率。直流电容分析表明，ag-ZME具有高介电行为，允许其选择性地将电子注入到有机层的LUMO中，同时防止空穴的非发射性直接还原。甲氧基乙醇钙（II）（CME）也用作EIL用于比较，并且在iOLED中显示出与ZME几乎相同的性能，尽管其具有强绝缘性质。Ag-CME和ag-ZME中Ca（II）和Zn（II）的4s轨道被用来调节电子注入，这些见解提供了一种新的设计策略，使用非晶介电金属有机薄膜作为EIL，这可能会产生高性能，柔性和稳定的电子器件，如iOLED和钙钛矿太阳能电池。

项目成果

OLED素子上へのウェットプロセスによるハイバリア構造の開発

OLED元件湿法高阻隔结构的开发

• 发表时间: 2020
• 作者: 孫麗娜;佐々木 樹;上村 佳歩;高橋 辰宏;硯里 善幸
• 通讯作者: 硯里 善幸

Solution processing of functional thin films and their device applications

功能薄膜的溶液加工及其器件应用

• 发表时间: 2023
• 作者: Sun Lina;Uda Kyota;Yoshida Tsukasa;Suzuri Yoshiyuki;孫 麗娜
• 通讯作者: 孫 麗娜

塗布型・高バリア性PHPS薄膜におけるVUV光焼成プロセスの解明

阐明涂层高阻隔 PHPS 薄膜的 VUV 光烘烤工艺

• 发表时间: 2020
• 作者: 佐々木 樹;上村 佳歩;孫 麗娜;高橋 辰宏;硯里 善幸
• 通讯作者: 硯里 善幸

Nanometer-Thick SiN Films as Gas Barrier Coatings Densified by Vacuum UV Irradiation

• DOI: 10.1021/acsanm.1c01862
• 发表时间: 2021-09
• 期刊: ACS Applied Nano Materials
• 影响因子: 5.9
• 作者: Tatsuki Sasaki;Lina Sun;Yu Kurosawa;Tatsuhiro Takahashi;Yoshiyuki Suzuri

Photochemical room temperature solution processing of functional thin films

功能薄膜的光化学室温溶液加工

• 发表时间: 2022
• 作者: L. Sun;T. Sasaki;T. Takahashi;T. Yoshida;Y. Suzuri
• 通讯作者: Y. Suzuri