Photochromic devices (PC) are considered as ideal candidates for integrated building applications because of their ability to control light and heat transfer into/out of building inner spaces without any external power supply. However, several issues restrict their practical application, including long-term stability concerns due to the volatile nature of the commonly used liquid electrolyte, the high replacement/installation cost associated with their rigid device architecture, and an extremely slow bleaching speed during reversion to their original state due to the lack of an external stimulus such as electricity. The present study aimed to resolve these bottlenecks. Firstly, we exploited a highly stable and conductive polymer-gel electrolyte based on UV-curable trivalent acrylate instead of using organic liquid-based electrolytes. Secondly, we explored a low-temperature UV-curing procedure to deposit the chromogenic WO₃ and TiO₂ layers, suitable for fabricating a flexible PC device. Finally, a catalytic amount of Pt nanoparticles was successfully incorporated on the surface of the WO₃ layer using an identical UV-curing route, which was found to significantly enhances the bleaching speed of the resulting PC device. Thanks to the combined positive effects, the fabricated PC device displayed a deep contrast in coloration (approximately 60 %), unprecedented bleaching kinetic with 90 % recovery of its original transmittance value within 45 min in the dark condition, and prolonged long-term operation for over 1000 coloration-bleaching cycles. These results open way to making efficient PCs for not only smart windows but also for other bendable or wearable applications.

光致变色器件 (PC) 被认为是集成建筑应用的理想选择，因为它们能够在没有任何外部电源的情况下控制光和热传入/传出建筑内部空间。然而，有几个问题限制了它们的实际应用，包括由于常用液体电解质的挥发性而导致的长期稳定性问题、与刚性设备结构相关的高更换/安装成本以及在恢复到它们的过程中极慢的漂白速度。由于缺乏外部刺激（如电）的原始状态。本研究旨在解决这些瓶颈。首先，我们开发了一种基于紫外线固化三价丙烯酸酯的高度稳定和导电的聚合物凝胶电解质，而不是使用有机液体电解质。第二，₃层和 TiO ₂层，适用于制造柔性 PC 设备。最后，使用相同的 UV 固化途径成功地将催化量的 Pt 纳米粒子结合到 WO ₃层的表面上，发现这显着提高了所得 PC 器件的漂白速度。由于综合的积极影响，制造的 PC 设备显示出强烈的着色对比度（约 60%），前所未有的漂白动力学，在黑暗条件下 45 分钟内恢复其原始透射率值 90%，并延长了长期运行时间超过 1000 次着色-漂白循环。这些结果为制造高效 PC 开辟了道路，不仅适用于智能窗户，还适用于其他可弯曲或可穿戴应用。