High-Throughput Robotic Synthesis and Photoluminescence Characterization of Aqueous Multinary Copper–Silver Indium Chalcogenide Quantum Dots,Particle & Particle Systems Characterization

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High-Throughput Robotic Synthesis and Photoluminescence Characterization of Aqueous Multinary Copper–Silver Indium Chalcogenide Quantum Dots
Particle & Particle Systems Characterization ( IF 2.7 ) Pub Date : 2021-09-02 , DOI: 10.1002/ppsc.202100169
Oleksandr Stroyuk ₁ , Oleksandra Raievska _{2,

3} , Stefan Langner ₁ , Christian Kupfer ₄ , Anastasia Barabash ₄ , Dmytro Solonenko _{2,

3} , Yuriy Azhniuk _{5,

6} , Jens Hauch ₁ , Andres Osvet ₄ , Miroslaw Batentschuk ₄ , Dietrich R. T. Zahn _{2,

3} , Christoph J. Brabec _{1,

4}

Affiliation

The feasibility of a high-throughput robot-assisted synthesis of complex Cu_1-_xAg_xInS_ySe_1-_x (CAISSe) quantum dots (QDs) by spontaneous alloying of aqueous glutathione-capped Ag–In–S, Cu–In–S, Ag–In–Se, and Cu–In–Se QDs is demonstrated. Both colloidal and thin-film core CAISSe and core/shell CAISSe/ZnS QDs are produced and studied by high-throughput semiautomated photoluminescence (PL) spectroscopy. The silver-copper-mixed QDs reveal clear evidence of a band bowing effect in the PL spectra and higher average PL lifetimes compared to the counterparts containing silver or copper only. The photophysical analysis of CAISSe and CAISSe/ZnS QDs indicates a composition-dependent character of the nonradiative recombination in QDs. The rate of this process is found to be lower for mixed copper-silver-based QDs compared to Cu- or Ag-only QDs. The combination of the band bowing effect and the suppressed nonradiative recombination of CAISSe QDs is beneficial for their applications in photovoltaics and photochemistry. The synergy of high-throughput robotic synthesis and a high-throughput characterization in this study is expected to grow into a self-learning synthetic platform for the production of metal chalcogenide QDs for light-harvesting, light-sensing, and light-emitting applications.

中文翻译：

水性多元铜-银铟硫属化物量子点的高通量机器人合成和光致发光表征

复杂Cu _1-_x Ag _x InS _y Se _1-_x的高通量机器人辅助合成的可行性(CAISSe) 量子点 (QD) 通过水合谷胱甘肽封端的 Ag-In-S、Cu-In-S、Ag-In-Se 和 Cu-In-Se QD 的自发合金化得到证明。胶体和薄膜核 CAISSe 和核/壳 CAISSe/ZnS QD 都是通过高通量半自动光致发光 (PL) 光谱法生产和研究的。与仅含银或铜的对应物相比，银铜混合 QD 显示出明显的证据表明 PL 光谱中的带弯曲效应和更高的平均 PL 寿命。CAISSe 和 CAISSe/ZnS QD 的光物理分析表明 QD 中非辐射复合的组成依赖特征。与仅含铜或银的 QD 相比，发现该过程的速率对于混合的铜银基 QD 较低。CAISSe QD 的能带弯曲效应和抑制的非辐射复合相结合，有利于它们在光伏和光化学中的应用。本研究中高通量机器人合成和高通量表征的协同作用有望发展成为自学合成平台，用于生产用于光收集、光传感和发光应用的金属硫属化物量子点。

更新日期：2021-10-18

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