Abstract Highly photo-stable CsPbI3 perovskite quantum dots (PeQDs) were prepared using thiol as an exchanged ligand. Among the CsPbX3 PeQDs, CsPbI3 with common capping ligands such as oleic acid (OA) and oleylamine (OLA) was particularly unstable and the optical properties were readily degraded because of its structural instability. To overcome these problems, thiol ( SH) as an exchanged ligand was used to stabilize the structure and could maintain the structural and optical properties. The synthesized CsPbI3 exhibited highly improved photo-stability under ultraviolet (365 nm) irradiation by ligand exchange from OA and OLA to thiol. As an application, perovskite films were fabricated using the PeQDs and a cyclic olefin copolymer (COC). The thiol-treated PeQD films exhibited higher stability than the untreated films under irradiation with a blue light-emitting diode (LED).

中文翻译：

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通过硫醇配体交换的高光稳定性 CsPbI3 钙钛矿量子点及其聚合物薄膜应用

摘要 使用硫醇作为交换配体制备了高度光稳定的 CsPbI3 钙钛矿量子点 (PeQDs)。在 CsPbX3 PeQDs 中，CsPbI3 与常见的封端配体如油酸 (OA) 和油胺 (OLA) 特别不稳定，并且由于其结构不稳定性，光学性质很容易退化。为了克服这些问题，使用硫醇（SH）作为交换配体来稳定结构并保持结构和光学特性。通过从 OA 和 OLA 到硫醇的配体交换，合成的 CsPbI3 在紫外线 (365 nm) 照射下表现出高度改善的光稳定性。作为应用，钙钛矿薄膜是使用 PeQD 和环烯烃共聚物 (COC) 制造的。