【公開日：2023.08.01】【最終更新日：2023.05.08】
課題データ / Project Data
課題番号 / Project Issue Number
22KT0014
利用課題名 / Title
The real-time observetion of core-shell structure NCs in glass matrices
利用した実施機関 / Support Institute
京都大学
機関外・機関内の利用 / External or Internal Use
内部利用（ARIM事業参画者以外）/Internal Use (by non ARIM members)
技術領域 / Technology Area
【横断技術領域 / Cross-Technology Area】（主 / Main）計測・分析/Advanced Characterization（副 / Sub）-
【重要技術領域 / Important Technology Area】（主 / Main）次世代ナノスケールマテリアル/Next-generation nanoscale materials（副 / Sub）高度なデバイス機能の発現を可能とするマテリアル/Materials allowing high-level device functions to be performed
キーワード / Keywords
Perovskite, glass ceramics, quantum dot,電子顕微鏡/Electron microscopy,量子効果デバイス/ Quantum effect device,ナノ粒子/ Nanoparticles
利用者と利用形態 / User and Support Type
利用者名（課題申請者）/ User Name (Project Applicant)
田部 勢津久
所属名 / Affiliation
京都大学 人間・環境学研究科
共同利用者氏名 / Names of Collaborators in Other Institutes Than Hub and Spoke Institutes
Ruilin ZHENG
ARIM実施機関支援担当者 / Names of Collaborators in The Hub and Spoke Institutes
山口 睦
利用形態 / Support Type
（主 / Main）技術代行/Technology Substitution（副 / Sub）-
利用した主な設備 / Equipment Used in This Project
KT-403：モノクロメータ搭載低加速原子分解能分析電子顕微鏡
報告書データ / Report
概要（目的・用途・実施内容）/ Abstract (Aim, Use Applications and Contents)
The growth process of the halide-chalcogenide QDs in amorphous oxide matrix was successfully elucidated via in-situ analytical electron microscope. The multilayer core-shell structural CsPbX3-ZnS QDs exists in the amorphous oxide matrix, and the obtained CsPbX3 QDs glass shows a multi core-shell microstructural density distribution.
実験 / Experimental
The high-resolution microstructure and the high angle annular dark-field (HAADF) images were investigated by an atomic resolution analytical electron microscope (STEM) (JEM-ARM200F, JEOL, 200kV). The elemental distribution was analyzed by energy-dispersive X-ray spectroscopy (EDX) (JED-2300T SDD100GV, JEOL). The temperature of in-situ TEM and STEM were controlled using an equipped heating sample holder.
結果と考察 / Results and Discussion
We successfully clarified the growth mechanism and phase transition of halide-chalcogenide core-shell QDs in an amorphous oxide matrix via in-situ analytical electron microscope technique. The as-prepared glass exhibits nanoglass phase separation microstructure which is composed of non-stoichiometric halide precursors. The in-situ growth process of halide-chalcogenide QDs in an amorphous oxide matrix is a nanoglass-based phase transition process. More importantly, the complex halide-chalcogenide multi-phase transition process exists in the amorphous oxide matrix, and the obtained CsPbX3-ZnS QDs glass-ceramic shows a multi core-shell microstructural density distribution. It helps in understanding the in-situ growth mechanism of halide-chalcogenide QDs in an amorphous matrix and the development of highly efficient QDs embedded materials and optoelectronic devices.
図・表・数式 / Figures, Tables and Equations
TEM images of the (a) GC-ClBr, (b) GC-Br, and (c) GC-BrI. (d) PL spectra, and (e) absorption intensity (Ahν)2 versus the energy of the gralss ceramic samples (GC-ClBr, GC-Br, GC-BrI) using a 365 nm LED as the light source.
その他・特記事項（参考文献・謝辞等） / Remarks(References and Acknowledgements)
The work by R.Z. was financially supported by the Grant-in-Aid for JSPS Fellows (Grant No. 20F40051). This work was supported by “Advanced Research Infrastructure for Materials and Nanotechnology in Japan (ARIM)” of the Ministry of Education, Culture, Sports, Science and Technology (MEXT) Grant Number JPMXP1222KT0014. We thank Dr. Atsushi Yamaguchi and Prof. Hiroki Kurata for the analytical electron microscope measurements.
成果発表・成果利用 / Publication and Patents
論文・プロシーディング（DOIのあるもの） / DOI (Publication and Proceedings)
-
Ruilin Zheng, Reversible Phase Segregation and Amorphization of Mixed-Halide Perovskite Nanocrystals in Glass Matrices, The Journal of Physical Chemistry Letters, 13, 7809-7815(2022).
DOI: 10.1021/acs.jpclett.2c02261
口頭発表、ポスター発表および、その他の論文 / Oral Presentations etc.
- R. Zheng, S. Tanabe. 日本セラミックス協会第35回秋季シンポジウム (9/14-16, 2022)
特許 / Patents
特許出願件数 / Number of Patent Applications：0件
特許登録件数 / Number of Registered Patents：0件