Ligand assisted swelling–deswelling microencapsulation (LASDM) for stable, color tunable perovskite–polymer composites,Nanoscale Advances

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Ligand assisted swelling–deswelling microencapsulation (LASDM) for stable, color tunable perovskite–polymer composites
Nanoscale Advances ( IF 4.6 ) Pub Date : 2020-03-18 , DOI: 10.1039/d0na00196a
Juan He ₁ , Ziqian He ₁ , Andrew Towers _{2,

3} , Tao Zhan ₁ , Hao Chen _{1,

2} , Le Zhou ₄ , Caicai Zhang _{2,

4} , Ran Chen _{1,

5} , Ted Sun ₆ , Andre J Gesquiere _{1,

2,

3,

4} , Shin-Tson Wu ₁ , Yajie Dong _{1,

2,

4}

Affiliation

Metal halide perovskite nanocrystals (PNCs), with excellent electronic and optical properties, are promising for a variety of optoelectronic and photonic applications. However, the instability issue still impedes their practical applications. Here a ligand-assisted swelling–deswelling microencapsulation (LASDM) strategy is proposed and evaluated for improving the stability and photoluminescence (PL) performance of PNCs. With ligand assistance, well dispersed and intimately passivated PNCs in polymer matrices are obtained. Compared with the previously reported swelling–deswelling microencapsulation (SDM) strategy, the proposed method can provide better nanocrystal size control and surface coordination. Thus, full-color perovskite–polymer composites (PPCs) with unprecedented environmental stability can be achieved and concentration quenching can be avoided in polymer matrices. The excellent color purity, color tunability, optical density variability and environmental stability make PPCs highly promising for a range of PL applications, such as tailored lighting and transparent projection displays. Moreover, the simple, low cost, scalable process and the compatibility of this method with a group of polymer matrices should pave the way for PPCs to meet the requirements for practical use.

中文翻译：

配体辅助溶胀-消溶胀微胶囊（LASDM）用于稳定、颜色可调的钙钛矿-聚合物复合材料

金属卤化物钙钛矿纳米晶体（PNC）具有优异的电子和光学性能，在各种光电和光子应用中具有广阔的前景。然而，不稳定问题仍然阻碍了它们的实际应用。这里提出并评估了配体辅助溶胀-消溶胀微胶囊 (LASDM) 策略，以提高 PNC 的稳定性和光致发光 (PL) 性能。在配体的帮助下，可以在聚合物基质中获得良好分散且紧密钝化的 PNC。与之前报道的溶胀-消溶胀微胶囊（SDM）策略相比，该方法可以提供更好的纳米晶尺寸控制和表面配位。因此，可以实现具有前所未有的环境稳定性的全色钙钛矿聚合物复合材料（PPC），并且可以避免聚合物基质中的浓度猝灭。出色的色纯度、颜色可调性、光密度可变性和环境稳定性使 PPC 在一系列 PL 应用中极具前景，例如定制照明和透明投影显示器。此外，简单、低成本、可扩展的工艺以及该方法与一组聚合物基质的兼容性应该为PPC满足实际应用的要求铺平道路。

更新日期：2020-03-18

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