极端条件下钙钛矿氧化物低维结构的光电特性及其应用

项目名称： 极端条件下钙钛矿氧化物低维结构的光电特性及其应用

项目编号： No.11474349

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 数理科学和化学

项目作者： 何萌

作者单位： 中国科学院物理研究所

项目金额： 90万元

中文摘要： 钙钛矿氧化物是复杂电子体系材料，即电子电荷、晶格、轨道和自旋等各个自由度之间存在着竞争和相互关联的关系，与半导体材料相比，该类材料的物理性质更丰富。并且其结构更稳定，具有耐高温、抗辐照、不怕氧化、不怕潮解等特点，可以应用在高温、强辐照等极端条件下。本项目将研究钙钛矿氧化物低维结构在高温、低温、强辐照等极端条件下的光电特性，揭示其机理，以及研制快响应、高灵敏度的紫外探测器，并检验其在高温、低温、强辐照下的性能这两方面内容。 本项目将首先通过人工结构设计和原子层面可控制备，外延生长具有原子级平整度界面的钙钛矿氧化物低维结构；研究氧化物低维结构在高温、低温、强辐照等极端条件下的光电特性，并揭示其机理，提高其性能；最后，研制快响应、高灵敏度、抗辐照、耐高温的新一代紫外探测器件，制作出2~3种能在极端条件下工作的新型氧化物紫外探测器件。

中文关键词： 钙钛矿氧化物低维结构；光电效应；极端条件；紫外光电探测；激光分子束外延

英文摘要： Perovskite oxide materials belong to complex electronic system, and there are relationships of competition and various interactions between the degrees of freedom of electron, lattice, orbital, and spin. Therefore, perovskite oxides have more extensive properties compared with semiconductor materials. And the structures of perovskite oxides are more stable, and perovskite oxides have characteristics of thermostabilityanti, anti-irradiation, anti-oxidation, and anti-deliquescence, etc, therefore perovskite oxides can work under extreme conditions of high temperature and strong irradiation. This project will focus on two aspects, one is to investigate the photoelectric effects of the perovskite oxide low-dimensional structures under the extreme conditions of high temperature, low temperature, and strong irradiation; another is to fabricate the perovskite oxide ultraviolet photodetectors with fast response and high sensitivity, and to fabricate two or three kinds of new oxide ultraviolet photodetectors which can work under extreme conditions. In this project, firstly, through artificial design and controllable preparation at atomic level, perovskite oxide low-dimensional structures will be epitaxially grown with atomically smooth interface. Secondly, the photoelectric effects of perovskite oxide low-dimensional structures under extreme conditions of high temperature, low temperature, and strong irradiation, and the mechanism will be revealed. Finally, we will fabricate the new-generation ultraviolet photodetectors with fast response, high sensitivity, anti-irradiation, and working at high-temperature using perovskite oxide low-dimensional structures. Two or three new pieces of oxide ultraviolet detectors will be fabricated.

英文关键词： Pervoskite oxide low-dimensional structures;Photoelectric effect;Extreme conditions;Ultraviolet photodetectors;Laser molecular beam epitaxy