Enabling Tailorable Optical Properties and Markedly Enhanced Stability of Perovskite Quantum Dots by Permanently Ligating with Polymer Hairs
Enabling Tailorable Optical Properties and Markedly Enhanced Stability of Perovskite Quantum Dots by Permanently Ligating with Polymer Hairs
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DOI：
10.1002/adma.201901602
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发表时间：
2019-06
影响因子：
29.4
通讯作者：
Y. Yoon;Yajing Chang;Shuguang Zhang;Meng Zhang;Shuang Pan;Yanjie He;C. Lin;Shengtao Yu;Yihuang Chen;Zewei Wang;Yong Ding;Jaehan Jung;N. Thadhani;V. Tsukruk;Z. Kang;Zhiqun Lin
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文献类型：
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作者：
Y. Yoon;Yajing Chang;Shuguang Zhang;Meng Zhang;Shuang Pan;Yanjie He;C. Lin;Shengtao Yu;Yihuang Chen;Zewei Wang;Yong Ding;Jaehan Jung;N. Thadhani;V. Tsukruk;Z. Kang;Zhiqun Lin
钙钛矿量子点（QD）对湿度的不稳定性仍然是其在光电器件中长期使用的主要障碍之一。在本文中，提出了一种通用的两亲性星星状嵌段共聚物纳米反应器策略，用于原位制作一组具有精确可调尺寸和异常高的水和胶体稳定性的毛状钙钛矿QD。前体在由星星状二嵌段共聚物的内部亲水嵌段占据的隔室内的选择性分配赋予了在非极性溶剂中通过共沉淀由外部疏水嵌段永久连接的坚固的毛状钙钛矿QD的原位形成。这些尺寸和组成可调的钙钛矿量子点显示出令人印象深刻的水和胶体稳定性，因为量子点的表面被一层外部疏水聚合物毛发紧密且永久地连接。更有趣的是，外部疏水聚合物的长度容易改变，使得对毛状钙钛矿QD的稳定性增强的显著控制。
Instability of perovskite quantum dots (QDs) toward humidity remains one of the major obstacles for their long‐term use in optoelectronic devices. Herein, a general amphiphilic star‐like block copolymer nanoreactor strategy for in situ crafting a set of hairy perovskite QDs with precisely tunable size and exceptionally high water and colloidal stabilities is presented. The selective partition of precursors within the compartment occupied by inner hydrophilic blocks of star‐like diblock copolymers imparts in situ formation of robust hairy perovskite QDs permanently ligated by outer hydrophobic blocks via coprecipitation in nonpolar solvent. These size‐ and composition‐tunable perovskite QDs reveal impressive water and colloidal stabilities as the surface of QDs is intimately and permanently ligated by a layer of outer hydrophobic polymer hairs. More intriguingly, the readily alterable length of outer hydrophobic polymers renders the remarkable control over the stability enhancement of hairy perovskite QDs.