Halide perovskite quantum dots (PQDs) are promising materials for diverse applications including displays, light‐emitting diodes, and solar cells due to their intriguing properties such as tunable bandgap, high photoluminescence quantum yield, high absorbance, and narrow emission peaks. Despite the prosperous achievements over the past several years, PQDs face severe challenges in terms of stability under different circumstances. Currently, researchers have overcome part of the stability problem, making PQDs sustainable in water, oxygen, and polar solvents for long‐term use. However, halide PQDs are easily degraded under continuous irradiation, which significantly limits their potential for conventional applications. In this study, an oleic acid/oleylamine (traditional surface ligands)‐free method to fabricate perovskite quantum dot papers (PQDP) is developed by adding cellulose nanocrystals as long‐chain binding ligands that stabilize the PQD structure. As a result, the relative photoluminescence intensity of PQDP remains over ≈90% under continuous ultraviolet (UV, 16 W) irradiation for 2 months, showing negligible photodegradation. This proposed method paves the way for the fabrication of ultrastable PQDs and the future development of related applications.

中文翻译：

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高抗紫外线英寸级混合钙钛矿量子点纸

卤化物钙钛矿量子点（PQD）因其具有可调谐带隙、高光致发光量子产率、高吸光度和窄发射峰等有趣的特性，成为显示器、发光二极管和太阳能电池等多种应用的有前途的材料。尽管过去几年取得了巨大的成就，但PQD在不同情况下的稳定性方面面临着严峻的挑战。目前，研究人员已经克服了部分稳定性问题，使得PQD可以在水、氧气和极性溶剂中长期使用。然而，卤化物PQD在连续照射下很容易降解，这极大地限制了它们在传统应用中的潜力。在这项研究中，通过添加纤维素纳米晶体作为稳定PQD结构的长链结合配体，开发了一种无需油酸/油胺（传统表面配体）的方法来制造钙钛矿量子点纸（PQDP）。结果，在连续紫外线（UV，16 W）照射2个月下，PQDP的相对光致发光强度保持在约90%以上，表现出可忽略不计的光降解。该方法为超稳定PQD的制造和相关应用的未来发展铺平了道路。