低次元有機・無機ハイブリッドペロブスカイト単結晶の作製と熱電変換特性の計測

低维有机/无机杂化钙钛矿单晶的制备及热电转换性能的测量

• 批准号: 19J10303
• 负责人: DUONG THI Mai Huong
• 金额: $ 1.09万
• 依托单位: Osaka University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for JSPS Fellows
• 财政年份: 2019
• 资助国家: 日本
• 起止时间: 2019-04-25 至 2021-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-19J10303/
• 关键词: Self trapped exciton; 1D hybrid perovskite; single crystal; broadband emission; hybrid-perovskite; low-dimensional; face-shared

Self trapped exciton (STEs) are widely assigned for broadband emissions in low-dimensional hybrid perovskite which promises application potential in white LED light conversion devices. Two models have been proposed for broadband emission in hybrid perovskite. The role of the organic molecules in the absorption-emission process and the effect of the inorganic framework on the emission mechanism remains unclear. One of the effective ways to understand the influence of organic molecule and inorganic part in the STEs phenomenon is to exam the optical properties of various structures based on different molecules. Single crystals of various 1D hybrid perovskite structures are good candidates for examining STEs to illuminate the roles of organic molecules and structure in the generation of STEs. In this work, the photoluminescence (PL) and time-resolved PL spectra of the four lead iodide 1D compounds were studied. The compounds exhibited a broadband emission with a large Stokes shift assigned to STE in the organic molecules following the model I. At low temperatures, compound 1DI-4McPy exhibited two broadband emissions at 2.36 and 1.73 eV which would be assigned to STEs arising from distortion in the inorganic chain and organic part, respectively. These results are a good foundation for further investigation into the absorption and emission mechanisms of 1D hybrid perovskite.

自俘获激子 (STE) 广泛用于低维混合钙钛矿中的宽带发射，这有望在白光 LED 光转换器件中发挥应用潜力。已经提出了两种混合钙钛矿宽带发射模型。有机分子在吸收发射过程中的作用以及无机骨架对发射机制的影响仍不清楚。了解有机分子和无机部分对STE现象的影响的有效方法之一是检查基于不同分子的各种结构的光学性质。各种一维杂化钙钛矿结构的单晶是检查 STE 的良好候选者，以阐明有机分子和结构在 STE 生成中的作用。在这项工作中，研究了四种碘化铅一维化合物的光致发光（PL）和时间分辨PL光谱。这些化合物表现出宽带发射，其中有机分子中的 STE 具有较大的斯托克斯位移，遵循模型 I。在低温下，化合物 1DI-4McPy 在 2.36 和 1.73 eV 处表现出两个宽带发射，这将被分配给因扭曲而产生的 STE。分别为无机链和有机部分。这些结果为进一步研究一维杂化钙钛矿的吸收和发射机制奠定了良好的基础。

项目成果

Substitutional doping of hybrid organic–inorganic perovskite crystals for thermoelectrics

用于热电材料的有机-无机杂化钙钛矿晶体的替代掺杂

• DOI: 10.1039/d0ta03648j
• 发表时间: 2020-07-14
• 期刊: Journal of Materials Chemistry
• 作者: Weidong Tang;Jinshuai Zhang;S. Ratnasingham;F. Liscio;Kan Chen;Tianjun Liu;K. Wan;E. S. Galindez;E. Bilotti;M. Reece;M. Baxendale;S. Milita;M. McLachlan;Lei Su;O. Fenwick
• 通讯作者: O. Fenwick

ハロゲン化鉛ペロブスカイト単結晶の電気特性

卤化铅钙钛矿单晶的电性能

• 发表时间: 2019
• 作者: 分子アーキテクトニクス研究会

Preparation of perovskite-derived one dimensional single crystals based on edge-shared octahedrons with pyridine derivatives

吡啶衍生物制备基于共边八面体的钙钛矿衍生一维单晶

• 发表时间: 2020
• 影响因子: 1.8
• 作者: Thi

有機-無機ハロゲン化ペロブスカイト単結晶の熱輸送機構

有机-无机卤化钙钛矿单晶的传热机理

• 发表时间: 2019
• 作者: 応用物理学会

Seebeck Coefficient of Two Dimensional Hybrid Perovskites

二维杂化钙钛矿的塞贝克系数

• 发表时间: 2019
• 作者: 分子アーキテクトニクス研究会