Metal-Halide-Perovskite Photopolymer Composites: Moisture, Ion Migration, Cure Compatibility and Optoelectronic Performance

Metal-halide perovskites offer strong absorption, composition-dependent emission and fast radiative responses, but their soft ionic lattices and environmental sensitivity create unusual constraints when they are embedded in photocurable polymers. A successful print requires more than particle dispersion. The perovskite phase must survive resin preparation, photoinitiation, exposure, polymerisation exotherm, washing and post-cure without unacceptable phase change or luminescence loss; the polymer must in turn provide sufficient optical access, low background absorption and a barrier environment compatible with the intended service condition. This review examines the coupled engineering problem using the recent demonstration of stereolithographically printed Cs4PbBr6-perovskite/photocurable-resin scintillators as an anchor. It separates moisture-driven degradation from ion migration, distinguishes encapsulation from intrinsic stabilisation, and emphasises that polymer incorporation can slow environmental attack without eliminating field-, light- or thermally activated ionic motion. A minimum qualification framework is proposed around phase identity, optical spectra, cure compatibility, water/oxygen exposure, thermal/light stress, ion-migration-sensitive measurements and device-level response. ER-422.