Journal
CHEMISTRY-AN ASIAN JOURNAL
Volume 14, Issue 7, Pages 1028-1033Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/asia.201801921
Keywords
band gap; non-ferroelectric piezoelectric; organic-inorganic hybrid composites; phase transition; semiconductors
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Funding
- National Natural Science Foundation of China [21703033,91856114, 21261024]
- Science Foundation of Jiangxi Provincial Office of Education [GJJ170900]
- Natural Science Foundation of Jiangxi Provincial [20181BAB203002]
- Young Elite Scientists Sponsorship Program By CAST [2018QNRC001]
- Natural Science Foundation of Jiangsu Province [BK20170658]
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Piezoelectric materials are a class of important functional materials applied in high-voltage sources, sensors, vibration reducers, actuators, motors, and so on. Herein, [(CH3)(3)S](3)[Bi2Br9](1) is a brilliant semiconducting organic-inorganic hybrid perovskite-type non-ferroelectric piezoelectric with excellent piezoelectricity. Strikingly, the value of the piezoelectric coefficient d(33) is estimated as approximate to 18 pC N-1. Such a large piezoelectric coefficient in non-ferroelectric piezoelectric has been scarcely reported and is comparable with those of typically one-composition non-ferroelectric piezoelectrics such as ZnO (3pC N-1) and much greater than those of most known typical materials. In addition, 1 exhibits semiconducting behavior with an optical band gap of approximate to 2.58 eV that is lower than the reported value of 3.37 eV for ZnO. This discovery opens a new avenue to exploit molecular non-ferroelectric piezoelectric and should stimulate further exploration of non-ferroelectric piezoelectric due to their high stability and low loss characteristics.
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