Ultrastable perovskite-zeolite composite enabled by encapsulation and in situ passivation.,Angewandte Chemie International Edition

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Ultrastable perovskite-zeolite composite enabled by encapsulation and in situ passivation.
Angewandte Chemie International Edition ( IF 16.1 ) Pub Date : 2020-09-05 , DOI: 10.1002/anie.202011203
Peijun Wang _{1,

2,

3} , Bolun Wang ₄ , Yucheng Liu ₂ , Lin Li ₅ , Hua Zhao ₂ , Yonghua Chen ₆ , Jiyang Li ₄ , Shengzhong Frank Liu _{1,

2,

3} , Kui Zhao _{1,

2}

Affiliation

Metal halide perovskites have been widely applied in optoelectronic fields, but their poor stability hinders their actual applications. A perovskite–zeolite composite was synthesized via in situ growth in air from aluminophosphate AlPO‐5 zeolite crystals and perovskite nanocrystals. The zeolite matrix provides quantum confinement for perovskite nanocrystals, achieving efficient green emission, and it passivates the defects of perovskite by H‐bonding interaction, which leads to a longer lifetime compared to bulk perovskite film. Furthermore, the AlPO‐5 zeolite also acts as a protection shield and enables ultrahigh stability of perovskite nanocrystals under 150 °C heat stress, under a 15‐month long‐term ambient exposure, and even in water for more than 2 weeks, respectively. The strategy of in situ passivation and encapsulation for the perovskite@AlPO‐5 composite was amenable to a range of perovskites, from MA‐ to Cs‐based perovskites. Benefiting from high stability and photoluminescence performance, the composite exhibits great potential to be virtually applied in light‐emitting diodes (LEDs) and backlight displays.

中文翻译：

通过封装和原位钝化实现超稳定的钙钛矿-沸石复合材料。

金属卤化物钙钛矿已广泛应用于光电子领域，但是其差的稳定性阻碍了它们的实际应用。钙钛矿-沸石复合材料是通过在空气中由铝磷酸盐AlPO-5沸石晶体和钙钛矿纳米晶体原位生长合成的。沸石基质为钙钛矿纳米晶体提供了量子限制，实现了有效的绿色发射，并且通过氢键相互作用钝化了钙钛矿的缺陷，与块状钙钛矿薄膜相比，使用寿命更长。此外，AlPO-5沸石还可以作为保护层，并分别在150°C的热应力下，在15个月的长期环境暴露下，甚至在水中超过2周的时间，实现钙钛矿纳米晶体的超高稳定性。钙钛矿@ AlPO-5复合材料的原位钝化和封装策略适用于从MA到Cs钙钛矿的一系列钙钛矿。得益于高稳定性和光致发光性能，该复合材料具有巨大的潜力，可以虚拟地应用于发光二极管（LED）和背光显示器。

更新日期：2020-09-05

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