Department of Chemistry, SRM University, Andhra Pradesh, Neerukonda, Guntur District, Mangalagiri, Andhra Pradesh 522240, India.
J Phys Chem Lett. 2022 Oct 13;13(40):9480-9493. doi: 10.1021/acs.jpclett.2c02403. Epub 2022 Oct 6.
In recent years, colloidal cesium lead halide (CsPbX) perovskite nanocrystals (PNCs) have attracted significant attention from researchers due to their unique optical properties and potential use in optoelectronic applications. In colloidal synthesis, oleic acid and oleylamine are commonly used as surface-capping ligands. Although oleylamine plays a crucial role in maintaining the colloidal stability and surface passivation of PNCs, its dynamic equilibrium with oleic acid leads to the formation of labile oleylammonium, which pulls halides from the surface of PNCs and thus degrades the crystals. In this Perspective, we summarize the various approaches for eliminating the amines to make high-quality, photostable, and amine-free CsPbX PNCs. In addition, we look over the prospects of these PNCs regarding stability in different environmental conditions, photoluminescence properties, and optoelectronic device performance. This perspective will give a broad overview of amine-free PNCs starting from their synthesis, challenges, and optoelectronic properties to their future prospects.
近年来，胶体铯铅卤（CsPbX）钙钛矿纳米晶体（PNCs）因其独特的光学性质和在光电应用中的潜在用途引起了研究人员的极大关注。在胶体合成中，油酸和油胺通常用作表面封端配体。尽管油胺在保持 PNCs 的胶体稳定性和表面钝化方面起着至关重要的作用，但它与油酸的动态平衡导致了不稳定的油铵的形成，从而从 PNCs 的表面提取卤化物，从而使晶体降解。在本观点中，我们总结了消除胺以制备高质量、耐光和无胺的 CsPbX PNCs 的各种方法。此外，我们还研究了这些 PNCs 在不同环境条件下、光致发光性能和光电设备性能方面的稳定性前景。本观点将从无胺 PNCs 的合成、挑战、光电性质及其未来前景等方面进行全面概述。
