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231225s2019 xx |||||o 00| ||eng c |
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|a 10.1002/adma.201805802
|2 doi
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|a pubmed24n0969.xml
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|a (DE-627)NLM290761786
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|a (NLM)30444031
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a eng
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| 100 |
1 |
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|a Xiao, Hongyuan
|e verfasserin
|4 aut
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|a Design for Highly Piezoelectric and Visible/Near-Infrared Photoresponsive Perovskite Oxides
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|c 2019
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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|a ƒa Online-Ressource
|b cr
|2 rdacarrier
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|a Date Completed 30.01.2019
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|a Date Revised 01.10.2020
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a © 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
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|a Defect-engineered perovskite oxides that exhibit ferroelectric and photovoltaic properties are promising multifunctional materials. Though introducing gap states by transition metal doping on the perovskite B-site can obtain low bandgap (i.e., 1.1-3.8 eV), the electrically leaky perovskite oxides generally lose piezoelectricity mainly due to oxygen vacancies. Therefore, the development of highly piezoelectric ferroelectric semiconductor remains challenging. Here, inspired by point-defect-mediated large piezoelectricity in ferroelectrics especially at the morphotropic phase boundary (MPB) region, an efficient strategy is proposed by judiciously introducing the gap states at the MPB where defect-induced local polar heterogeneities are thermodynamically coupled with the host polarization to simultaneously achieve high piezoelectricity and low bandgap. A concrete example, Ni2+ -mediated (1-x)Na0.5 Bi0.5 TiO3 -xBa(Ti0.5 Ni0.5 )O3-δ (x = 0.02-0.08) composition is presented, which can show excellent piezoelectricity and unprecedented visible/near-infrared light absorption with a lowest ever bandgap ≈0.9 eV at room temperature. In particular, the MPB composition x = 0.05 shows the best ferroelectricity/piezoelectricity (d33 = 151 pC N-1 , Pr = 31.2 μC cm-2 ) and a largely enhanced photocurrent density approximately two orders of magnitude higher compared with classic ferroelectric (Pb,La)(Zr,Ti)O3 . This research provides a new paradigm for designing highly piezoelectric and visible/near-infrared photoresponsive perovskite oxides for solar energy conversion, near-infrared detection, and other multifunctional applications
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|a Journal Article
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|a ceramics
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4 |
|a ferroelectrics
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4 |
|a perovskite oxides
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4 |
|a photovoltaics
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4 |
|a semiconductors
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1 |
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|a Dong, Wen
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Guo, Yiping
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Wang, Yufeng
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Zhong, Haoyin
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Li, Qian
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Yang, Ming-Min
|e verfasserin
|4 aut
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| 773 |
0 |
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|i Enthalten in
|t Advanced materials (Deerfield Beach, Fla.)
|d 1998
|g 31(2019), 4 vom: 18. Jan., Seite e1805802
|w (DE-627)NLM098206397
|x 1521-4095
|7 nnns
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| 773 |
1 |
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|g volume:31
|g year:2019
|g number:4
|g day:18
|g month:01
|g pages:e1805802
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|u http://dx.doi.org/10.1002/adma.201805802
|3 Volltext
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