欠陥フリー低鉛ペロブスカイトナノ結晶の基礎研究と光電デバイスへの応用

无缺陷低铅钙钛矿纳米晶的基础研究及其在光电器件中的应用

• 批准号: 18F18370
• 负责人: 沈 青
• 金额: $ 1.41万
• 依托单位: The University of Electro-Communications
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for JSPS Fellows
• 财政年份: 2018
• 资助国家: 日本
• 起止时间: 2018-11-09 至 2021-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-18F18370/
• 关键词: 量子ドット; ペロブスカイト; 低欠陥; 太陽電池; quantum dots; perovskite; less defect; solar cell; perovskite nanocrystals; perovskite solar cell; near-unity PL QY

In the research, we have proposed improved synthetic methods which can lead to significantly improved crystal quality and stability for the resulting perovskite Pb-based QD and Sn-Pb alloyed QD solutions. We have demonstrated that a high photoluminescence quantum yield of up to 100% can be obtained in the Pb-based perovskite QDs, signifying the achievement of almost complete elimination of the trapping defects. Ultrafast kinetic analysis evidences the negligible electron or hole trapping pathways in our QDs. Solar cells based on the high-quality QDs exhibit power conversion efficiency of over 12%. We expect the successful synthesis of the “ideal” perovskite QDs will exert profound influence on their applications to both QD-based light-harvesting and -emitting devices in the near future.

在研究中，我们提出了改进的合成方法，可以显着提高所得钙钛矿铅基量子点和锡铅合金量子点溶液的晶体质量和稳定性。我们已经证明，Pb基钙钛矿量子点可以获得高达100%的高光致发光量子产率，这意味着几乎完全消除了捕获缺陷。超快动力学分析证明我们的量子点中的电子或空穴捕获路径可以忽略不计。基于高质量量子点的太阳能电池的能量转换效率超过12%。我们预计“理想”钙钛矿量子点的成功合成将在不久的将来对其在基于量子点的光捕获和发射器件中的应用产生深远的影响。

项目成果

Atomistic and Electronic Origin of Phase Instability of Metal Halide Perovskites

• DOI: 10.1021/acsaem.0c00791
• 发表时间: 2020-12-28
• 期刊: ACS APPLIED ENERGY MATERIALS
• 影响因子: 6.4
• 作者: Jiang, Junke;Liu, Feng;Tao, Shuxia
• 通讯作者: Tao, Shuxia

Enhanced Near-Infrared Emission from Cs(Pb/Sn)I3 Quantum Dots by Sodium Doping

通过钠掺杂增强 Cs(Pb/Sn)I3 量子点的近红外发射

• 发表时间: 2019
• 作者: Jiang Junke;Liu Feng;Tranca Ionut;Shen Qing;Tao Shuxia;Qing Shen;Qing Shen;Feng Liu and Qing Shen
• 通讯作者: Feng Liu and Qing Shen

National Renewable Energy Laboratory(米国)

国家可再生能源实验室（美国）

Phase-Stable and High Optoelectronic Quality All-Inorganic Perovskite Quantum Dots and Their Application in Optoelectronic Devices

相稳定、高光电品质的全无机钙钛矿量子点及其在光电器件中的应用

• 发表时间: 2019
• 作者: Qing Shen

Phase stable and less-defect perovskite quantum dots: optical property, photoexcited carrier dynamics and application to solar cells

相稳定且缺陷较少的钙钛矿量子点：光学特性、光激发载流子动力学及其在太阳能电池中的应用

• 发表时间: 2020
• 作者: Jiang Junke;Liu Feng;Tranca Ionut;Shen Qing;Tao Shuxia;Qing Shen
• 通讯作者: Qing Shen