Abstract
AbstractLuminescent ferroelectrics are holding exciting prospect for integrated photoelectronic devices due to potential light‐polarization interactions at electron scale. Integrating ferroelectricity and long‐lived afterglow emission in a single material would offer new possibilities for fundamental research and applications, however, related reports have been a blank to date. For the first time, we here achieved the combination of notable ferroelectricity and afterglow emission in an organic‐inorganic hybrid material. Remarkably, the presented (4‐methylpiperidium)CdCl3 also shows noticeable antiferroelectric behavior. The implementation of cationic customization and halogen engineering not only enables a dramatic enhancement of Curie temperature of 114.4 K but also brings a record longest emission lifetime up to 117.11 ms under ambient conditions, realizing a leapfrog improvement of at least two orders of magnitude compared to reported hybrid ferroelectrics so far. This finding would herald the emergence of novel application potential, such as multi‐level density data storage or multifunctional sensors, towards the future integrated optoelectronic devices with multitasking capabilities.
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