LiNbO<sub>3</sub> :Pr<sup>3+</sup> : A Multipiezo Material with Simultaneous Piezoelectricity and Sensitive Piezoluminescence.
basic_science · Level V
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- Record sourced from PubMed, PMID 28370452.
- Also identified by DOI 10.1002/adma.201606914.
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Abstract
Red-emitting piezoluminescence (elasticoluminescence) is achieved by doping rare earth Pr<sup>3+</sup> into the well-known piezoelectric matrix, LiNbO<sub>3</sub> . By precisely tuning the Li/Nb ratio in nonstoichiometric Li <sub>x</sub> NbO<sub>3</sub> :Pr<sup>3+</sup> , a material that exhibits an unusually high piezoluminescence intensity, which far exceeds that of any well-known piezoelectric material, is produced. Li <sub>x</sub> NbO<sub>3</sub> :Pr<sup>3+</sup> shows excellent strain sensitivity at the lowest strain level, with no threshold for stress sensing. These multipiezo properties of sensitive piezoluminescence in a piezoelectric matrix are ideal for microstress sensing, damage diagnosis, electro-mechano-optical energy conversion, and multifunctional control in optoelectronics.