Room temperature phosphorescence (RTP) films have recently attracted increasing attention due to their excellent luminescent properties for information encryption, optoelectronic devices, and sensors. However, polyvinyl alcohol (PVA) films with abundant hydrogen bonds to suppress triplet energy dissipation suffered from the humidity induced phosphorescence quenching under storage in the air for a long time. In this work, poly(acrylic acid) (PAA) was selected to crosslink PVA matrix through esterification reactions for preparing water resistant RTP films. The blue, cyan, and orange emissive RTP films were successfully obtained by incorporating three different organic compounds into PVA-PAA crosslinking films. Crosslinking strategy significantly improved the phosphorescence emissions of the doped films, and effectively blocked the absorption of water molecular, leading to the excellent photostability of the developed films. As a proof of concept, the white light phosphorescence film and anti-counterfeiting applications were successfully demonstrated.

室温磷光 (RTP) 薄膜由于其在信息加密、光电器件和传感器方面的优异发光特性，最近引起了越来越多的关注。然而，具有丰富氢键以抑制三重态能量耗散的聚乙烯醇（PVA）薄膜在空气中长时间储存​​时会遭受湿气诱导的磷光猝灭。在这项工作中，选择聚（丙烯酸）（PAA）通过酯化反应交联PVA基质以制备防水RTP薄膜。通过将三种不同的有机化合物掺入 PVA-PAA 交联薄膜中，成功获得了蓝色、青色和橙色发光 RTP 薄膜。交联策略显着改善了掺杂薄膜的磷光发射，并有效阻断水分子的吸收，使显影薄膜具有优异的光稳定性。作为概念验证，成功展示了白光磷光膜和防伪应用。