Zhu Zhi-Yuan, Yang Qi-Qi, Gao Lin-Feng, Zhang Lei, Shi An-Ye, Sun Chun-Lin, Wang Qiang, Zhang Hao-Li
State Key Laboratory of Applied Organic Chemistry (SKLAOC), Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Key Laboratory of Special Function Materials and Structure Design, Ministry of Education, Lanzhou University , Lanzhou 730000, China.
J Phys Chem Lett. 2017 Apr 6;8(7):1610-1614. doi: 10.1021/acs.jpclett.7b00431. Epub 2017 Mar 24.
A facile and green mechanosynthesis strategy free of solvent and high reaction temperature was developed to fabricate highly emissive cesium lead halide perovskite (CsPbX) quantum dots (QDs). Their composition can be adjusted conveniently simply through mechanically milling/grinding stoichiometric combinations of raw reagents, thereby introducing a broad luminescence tunability of the product with adjustable wavelength, line width, and photoluminescence quantum yield. Desired CsPbX QDs "library" can thus be readily constructed in a way like assembling Lego building blocks. Hence, the method offered new avenues in the preparation of multicomponent cocrystals, adding one appealing apparatus to the tool box of perovskite-type QDs synthesis. Intriguingly, photoinduced dynamic study revealed the hole-transfer process of the as-prepared QDs toward electron donors, indicative of their potential in charge-transfer-based applications such as light-harvesting devices and photocatalysis.
开发了一种简便且绿色的无溶剂、无高温反应的机械合成策略来制备高发射性的卤化铯铅钙钛矿（CsPbX）量子点（QDs）。通过简单地对原料试剂的化学计量组合进行机械研磨，就可以方便地调整它们的组成，从而使产品具有广泛的发光可调性，包括可调节的波长、线宽和光致发光量子产率。因此，可以像组装乐高积木一样轻松构建所需的CsPbX量子点“库”。因此，该方法为多组分共晶体的制备提供了新途径，为钙钛矿型量子点合成工具箱增添了一种有吸引力的方法。有趣的是，光诱导动力学研究揭示了所制备量子点向电子供体的空穴转移过程，表明它们在基于电荷转移的应用（如光捕获装置和光催化）中的潜力。
