91成视频网站免费

91成视频网站免费

学院动态

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jinri,woxiaojixiegongchengxueyuanhuangwenbinyanjiuyuanzuoweigongtongdiyizuozhedezuixinyanjiuchengguo“giant photoflexoelectric effect in halide perovskites”(luhuagaitaikuangzhongdejudaguangnaoqudianxiaoying)zaiguojidingjixueshuqikan《nature materials》(《ziran•cailiao》)shangfabiao。nanchangdaxueshulonglongfujiaoshou,xibanyajiatailuoniyagaodengyanjiuyuangustau catalanjiaoshoushilunwendegongtongtongxunzuozhe,zhongqingdaxuejixiegongchengxueyuanboshishengwangzhiguozuochulezhongyaogongxian。

zuoweizhumingdenaturezazhizikan,《nature materials》shicailiao、wuli、huaxuedengjiaochaxuekelingyuzuijuyingxianglideqikanzhiyi,2019nianqiyingxiangyinzigaoda38.8。zheishizhongqingdaxuejixiegongchengxuekeyoushiyilaizaizheiyiguojidingjiankanwushangfabiaodediyipianlunwen,shixianlelingdetupo。

挠曲电效应(Flexoelectricity)是近年来逐渐发展起来的新型机电耦合效应,由于具有不受晶体对称性限制和小尺寸效应等的优点,挠曲电特有的梯度应变场不仅可以衍生出丰富的物理现象,而且在机械应力应变传感、能量收集等领域具有重大的应用潜力。自上世纪60年起至今,有关挠曲电的研究大都集中在金属氧化物体系。此次,本论文通过确凿的实验证据表明,有机无机杂化的卤化钙钛矿(CH3NH3PbX391成视频网站免费, X=Cl, Br)光伏半导体材料具有十分特殊的光致挠曲电增强现象(研究团队将其命名为光挠曲电效应),光挠曲电效应产生的等效挠曲电系数是目前已知的挠曲电系数值之最。

91成视频网站免费huangwenbinyanjiuyuanyunanchangdaxueshulonglongfujiaoshou、xibanyajiatailuoniyagaodengyanjiuyuangustau catalanjiaoshouhejixiegongchengxueyuanboshishengwangzhiguozuchengdeyanjiutuanduihaiduiguangnaoqudiandewulijizhizuoleshenruyanjiu,tichuleyitaoguanlianbandaotizailiuzinongduhejiezhicailiaodianjihuadelilunmoxing,gaimoxingyushiguangnaoqudianxiaoyingshisuoyouguangxishoucailiaozhongpubiancunzaidewulixianxiang,weijinyibukaizhanxiangguanyanjiuzhichulefangxiang。zheixianggongzuodiyicibaodaoleluhuaqiangaitaikuangcailiaodenaoqudianxiaoying、diyicifaxianlebandaoticailiaode“guangnaoqudian”xiaoying,zaiwulililunshanggaoduchuangxin,zaixingnengshangdaposhijiejilu。

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图(a) MAPbX3极化强度与应变梯度关系;(b)梯形挠曲电响应;(c)挠曲电尺寸效应和电极依赖性;(d)光挠曲电示意图;(e)光挠曲电频率依赖性;(f)光挠曲电实验结果;(g) MAPbX3光挠曲电系数与其他材料对比

gaiyanjiuchengguohuodeguojiazirankexuejijinhekejibuzhongdianyanfajihuaziketixiangmudezhichi。

供稿:黄文彬      审核: