Dual Extraction of Photogenerated Electrons and Holes from a Ferroelectric Sr0.5Ba0.5Nb2O6 Semiconductor
文献类型：期刊论文
| 作者 | Fan, Dayong1,2; Zhu, Jian1,2; Wang, Xiuli1; Wang, Shengyang1,2; Liu, Yong1,2; Chen, Ruotian1,2; Feng, Zhaochi1; Fan, Fengtao1; Li, Can1 |
| 刊名 | ACS APPLIED MATERIALS & INTERFACES
 |
| 出版日期 | 2016-06-08 |
| 卷号 | 8期号:22页码:13857-13864 |
| 关键词 | Ferroelectric Semiconductor Sbn Apv Photocatalysis Charge Separation Kpfm |
| ISSN号 | 1944-8244 |
| DOI | 10.1021/acsami.6b00809 |
| 文献子类 | Article |
| 英文摘要 | The separation of photogenetated charges is a critical factor in photocatalysis. Recently, anomalous photovoltaic (APV) field effects (V-oc similar to 10(3) V/cm) in ferroelectrics, with their strong driving force for charge separation, have attracted much attention in photocatalysis and photoelectrocatalysis. However,, it is still unknown whether photogenerated electrons and holes can be simultaneously extracted by the strong driving force toward the surface of ferroelectrics and can become available for surface reactions. This issue becomes critically important in photocatalysis because the surface reaction utilizes both the electrons and holes that reach the surface. In this work, a model lateral symmetric structure, metal/Sr0.5Ba0.5Nb2O6/metal (metal = Ag or Pt), as an electrode was fabricated: The dual extractions, of photogenerated electrons and holes on the two opposite metal electrodes were achieved, as revealed by photovoltaic and fertoelectrical hysteresis measurements and photoassisted Kelvin probe force microscopy (KPFM). It was found that the high Schottky barriers of the two opposite Sr0.5Ba0.5Nb2O6-Pt electrodes are key factors that alter the two space charge regions (SCRs) by a poling effect. The resulting built-in electrical fields with parallel directions near both electrodes significantly enhance the charge separation ability: Our model unravels the driving force of charge separation in ferroelectric semiconductors, thus demonstrating the potential for highly efficient charge separation in photocatalysis. |
| WOS关键词 | BISMUTH TITANATE CERAMICS ; PHOTOCHEMICAL REACTIVITY ; DIELECTRIC-RELAXATION ; BATIO3 ; BARIUM ; PHOTOCATALYST ; PHASE ; FILMS ; EVOLUTION ; CRYSTAL |
| WOS研究方向 | Science & Technology - Other Topics ; Materials Science |
| 语种 | 英语 |
| WOS记录号 | WOS:000377642100023 |
| 出版者 | AMER CHEMICAL SOC |
| 源URL | [http://cas-ir.dicp.ac.cn/handle/321008/170552]  |
| 专题 | 大连化学物理研究所_中国科学院大连化学物理研究所 |
| 通讯作者 | Fan, Fengtao; Li, Can |
| 作者单位 | 1.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian Natl Lab Clean Energy, State Key Lab Catalysis, Dalian 116023, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Fan, Dayong,Zhu, Jian,Wang, Xiuli,et al. Dual Extraction of Photogenerated Electrons and Holes from a Ferroelectric Sr0.5Ba0.5Nb2O6 Semiconductor[J]. ACS APPLIED MATERIALS & INTERFACES,2016,8(22):13857-13864. |
| APA | Fan, Dayong.,Zhu, Jian.,Wang, Xiuli.,Wang, Shengyang.,Liu, Yong.,...&Li, Can.(2016).Dual Extraction of Photogenerated Electrons and Holes from a Ferroelectric Sr0.5Ba0.5Nb2O6 Semiconductor.ACS APPLIED MATERIALS & INTERFACES,8(22),13857-13864. |
| MLA | Fan, Dayong,et al."Dual Extraction of Photogenerated Electrons and Holes from a Ferroelectric Sr0.5Ba0.5Nb2O6 Semiconductor".ACS APPLIED MATERIALS & INTERFACES 8.22(2016):13857-13864. |
入库方式： OAI收割
来源：大连化学物理研究所
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