Strongly-ligated perovskite quantum dots with precisely controlled dimensions and architectures for white light-emitting diodes
Strongly-ligated perovskite quantum dots with precisely controlled dimensions and architectures for white light-emitting diodes
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DOI：
10.1016/j.nanoen.2020.105043
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发表时间：
2020-11-01
期刊：
影响因子：
17.6
通讯作者：
Lin, Zhiqun
中科院分区：
文献类型：
--
作者：
Pan, Shuang;Chen, Yihuang;Lin, Zhiqun
尽管钙钛矿量子点 (PQD) 的合成取得了令人印象深刻的进展，但制造相同尺寸但不同结构（例如实心与空心）的 PQD 的能力仍然是一个巨大的挑战。此外，对 PQD 结构和组件的精确控制带来了新的光学和光电特性。在此，我们报告了一种强大的两亲星状嵌段共聚物纳米反应器策略，可在原位快速产生相同外径的单分散实心和空心PQD。 PQD 的尺寸可以通过利用星形共聚物轻松调节。与实心PQD相比，随着空心PQD内径的增加，它们的光致发光逐渐蓝移。此外，PQD 的条纹图案可以通过弯月面辅助自组装（MASA）方便地形成，然后进行阴离子交换，产生具有异质结构过渡区的多色条纹。从概念上讲，一系列 PQD（包括所有无机无铅和有机-无机 PQD）可轻松用于激光器、LED 和太阳能电池中的应用。
Despite impressive advances in the synthesis of perovskite quantum dots (PQDs), the ability to craft PQDs of the same dimension yet different architectures (e.g., solid vs. hollow) remains a grand challenge. Moreover, precise control over the architectures and assemblies of PQDs renders new optical and optoelectronic properties. Herein, we report on a robust amphiphilic star-like block copolymer nanoreactor strategy to rapidly create monodisperse solid and hollow PQDs of the same external diameter in-situ. The dimension of PQDs can be readily regulated by utilizing star-like copolymers. Compared to solid PQDs, as the inner diameter of hollow PQDs increases, their photoluminescence progressively blue-shifts. Moreover, stripe patterns of PQDs can be conveniently formed via meniscus-assisted self-assembly (MASA) and subsequently anion-exchanged to yield multi-colored stripes with a heterostructured transition zone. Conceptually, an array of PQDs including all inorganic lead-free and organic-inorganic PQDs, can be easily accessed for applications in lasers, LEDs, and solar cells.