Pressure-induced 2D-3D conversion in hybrid lead iodide layered perovskite
Hydrostatic pressurization can lead to new and improved material properties. However, most novel material properties are only retainable at high-pressure states, and therefore have no practical applicability at ambient conditions. Recently, a team of international scientists led by Dr. Lingping Kong and Dr. Gang Liu from HPSTAR reported permanent and irreversible transition of 2-D hybrid Dion-Jacobson lead iodide perovskite to 3-D perovskite phase at ambient conditions after pressure treatment. This work suggests the usefulness of high-pressure techniques in preparing materials for real-situation applications. The results, as reported in PNAS, marks crucial steps in utilizing pressure for ex-situ and ambient-environment applicability in engineering light-absorbing materials for high-performance optoelectronics and luminescence.