对聚甲基丙烯酸甲酯(PMMA)和聚苯乙烯-聚乙烯-聚丁烯-聚苯乙烯嵌段共聚物(SEBS)高分子聚合物材料包裹钙钛矿量子点进行了研究.利用一步包裹法制备了高质量的钙钛矿量子点薄膜, 在连续365 nm紫外激发下和LED远程封装时, PMMA钙钛矿薄膜衰减率分别约是SEBS薄膜的4倍和6倍, 证明了SEBS包裹的钙钛矿量子点薄膜稳定性优于PMMA.进一步对SEBS钙钛矿薄膜分别在空气、水等环境下的稳定性进行研究, 相比钙钛矿量子点溶液4 h衰退约18%, SEBS钙钛矿薄膜在空气中和水中衰退约18%延长至约55 h和240 h, 说明SEBS包裹之后增强了钙钛矿量子点的稳定性, 对钙钛矿量子点封装应用有着重要的意义.

Perovskite quantum dots have attracted great attention due to their narrow emission spectrum, tunable spectrum and high quantum yield, however, their poor stability because of the sensitivity of water and oxygen molecules limits their application. Polymethyl methacrylate (PMMA) and polystyrene-polyethylene-polybutene-polystyrene block copolymer (SEBS) were selected as two kinds of polymer materials to study their perovskite quantum dots film performances. The high-quality perovskite quantum dots films were fabricated by one-step package method. The decay rate of PMMA perovskite films was about 4 times and 6 times that of SEBS films under continuous 365 nm UV excitation and LED remote package, which indicated SEBS perovskite films had better stability than PMMA. Furthermore, the stability of SEBS perovskite films in air and water was studied. Compared with the 18% recession after about 4 h of the perovskite quantum dots solution, it was found that SEBS perovskite films in the air and water about 18% degradation extended to 55 h and 240 h, indicating that SEBS package enhanced the stability of the perovskite quantum dots, which has great significance to the application of perovskite quantum dot package in the future.