Abstract
Stimuli-responsive smart materials exhibit reverse chemical/physical changes in response to external stimuli and research on stimuli-responsive smart materials with self-powered properties is still un-cultivated ground.Here,we report perovskite crystalline self-powered multiple stimuli-responsive ma-terials triggered by chemical and thermal stimuli.[HMEP]PbI3·(H2O)(1;HMEP is a hydroxytris(1-methylethyl)phosphorus cation)crystallizes in a chiral space group P21 at 293 K and has the piezoelec-tric reaction(d33=10 pC/N and output voltage=1V)of self-powered modes,this value is larger than the value of 3 pC/N for the classical piezoelectric material ZnO.Piezoelectric materials can generate en-ergy due to mechanical deformation,and using thermal heating to lose water,[HMEP]PbI3(2)can be obtained.2 crystallizes in the non-centrosymmetric space group,undergoes two reversible phase transi-tions at 243/255K and 315/348 K,and shows second harmonic generation switching.Interestingly,2 can return to the hydrated form 1 after absorbing water.This work will lay the foundation for self-powered stimuli-responsive compounds and contribute to the construction of novel organic-inorganic hybrid ma-terials with second harmonic generation switching.
维普
万方数据