Xia Hongbo, Wu Suli, Li Lu, Zhang Shufen
State Key Laboratory of Fine Chemicals, Dalian University of Technology Dalian P. R. China
Qingdao University of Science and Technology China.
RSC Adv. 2018 Oct 22;8(63):35973-35980. doi: 10.1039/c8ra08102f.
CsPbX NCs with both high photoluminescence quantum yields (PLQYs) and enhanced stability have been obtained by using high binding ability ligands. As a result, the CsPbI NCs prepared using palmitic acid and oleylamine as ligands have high PLQY (up to 92%), and the PLQYs of CsPbX perovskite NCs can be sustained for one month with a slight decrease. Impressively, the presence of palmitic acid and stearic acid can dramatically improve the chemical stability of CsPbX NCs. Importantly, H NMR measurements indicate that much more palmitic acid remained on the surface of CsPbX NCs than oleic acid after purification using solvent, suggesting the higher binding ability of palmitic acid than oleic acid. Finally, the fabricated perovskite NCs were used as luminescent inks and phosphors of white light emitting diodes.
通过使用具有高结合能力的配体，已获得了具有高光致发光量子产率（PLQYs）和增强稳定性的CsPbX纳米晶体。结果，以棕榈酸和油胺作为配体制备的CsPbI纳米晶体具有高PLQY（高达92%），并且CsPbX钙钛矿纳米晶体的PLQYs可以在略有下降的情况下持续一个月。令人印象深刻的是，棕榈酸和硬脂酸的存在可以显著提高CsPbX纳米晶体的化学稳定性。重要的是，核磁共振氢谱测量表明，在使用溶剂纯化后，CsPbX纳米晶体表面残留的棕榈酸比油酸多得多，这表明棕榈酸比油酸具有更高的结合能力。最后，所制备的钙钛矿纳米晶体被用作发光油墨和白色发光二极管的磷光体。
