Photo-induced macro/mesoscopic scale ion displacement in mixed-halide perovskites:ring structures and ionic plasma oscillations|Xiaoxiao Sun;Yong Zhang;Weikun Ge|Department of Information Technology and Electrical Engineering,ETH Zurich,8093 Zurich,Switzerland - 期刊导航|首站-论文投稿智能助手|论文发表|论文智能投稿|期刊自助发表推荐|杂志社快速发表|查同导刊-域田数据官方网站

典型文献

Photo-induced macro/mesoscopic scale ion displacement in mixed-halide perovskites:ring structures and ionic plasma oscillations

文献摘要：

Contrary to the common belief that the light-induced halide ion segregation in a mixed halide alloy occurs within the illuminated area,we find that the Br ions released by light are expelled from the illuminated area,which generates a macro/mesoscopic size anion ring surrounding the illuminated area,exhibiting a photoluminescence ring.This intriguing phenomenon can be explained as resulting from two counter-balancing effects:the outward diffusion of the light-induced free Br ions and the Coulombic force between the anion deficit and surplus region.Right after removing the illumination,the macro/mesoscopic scale ion displacement results in a built-in voltage of about 0.4 V between the ring and the center.Then,the displaced anions return to the illuminated area,and the restoring force leads to a damped ultra-low-frequency oscillatory ion motion,with a period of about 20-30 h and lasting over 100 h.This finding may be the first observation of an ionic plasma oscillation in solids.Our understanding and controlling the"ion segregation"demonstrate that it is possible to turn this commonly viewed"adverse phenomenon"into novel electronic applications,such as ionic patterning,self-destructive memory,and energy storage.

文献关键词：

中图分类号：

[1] 医药、卫生（R） / 基础医学（R3） / 病理学（R36） / 病理过程（R364）

[2] 医药、卫生（R） / 药学（R9） / 药理学（R96） / 实验药理学（R965）

[3] 数理科学和化学（O） / 力学（O3） / 振动理论（O32） / 非线性振动（O322）

作者姓名：

Xiaoxiao Sun;Yong Zhang;Weikun Ge

作者机构：

Laboratory for Thin Films and Photovoltaics,Empa-Swiss Federal Laboratories for Materials Science and Technology,8600 Duebendorf,Switzerland;Department of Information Technology and Electrical Engineering,ETH Zurich,8093 Zurich,Switzerland;Institute of Ion Beam Physics and Materials Research,Helmholtz-Zentrum Dresden-Rossendorf,Dresden 01328,Germany;Department of Electrical and Computer Engineering,The University of North Carolina at Charlotte,Charlotte,NC 28223,USA;Department of Physics,Tsinghua University,Beijing 10084,People's Republic of China

文献出处：

光：科学与应用（英文版）

引用格式：

[1]Xiaoxiao Sun;Yong Zhang;Weikun Ge-.Photo-induced macro/mesoscopic scale ion displacement in mixed-halide perovskites:ring structures and ionic plasma oscillations)[J].光：科学与应用（英文版）,2022(10):2388-2398

A类：

expelled

B类：

Photo,induced,macro,mesoscopic,scale,displacement,mixed,halide,perovskites,structures,ionic,plasma,oscillations,Contrary,belief,that,light,segregation,alloy,occurs,within,illuminated,area,Br,released,by,from,which,generates,size,surrounding,exhibiting,photoluminescence,This,intriguing,phenomenon,can,explained,resulting,two,counter,balancing,effects,outward,diffusion,free,Coulombic,force,between,deficit,surplus,region,Right,after,removing,illumination,results,built,voltage,about,center,Then,displaced,anions,return,restoring,leads,damped,ultra,low,frequency,oscillatory,motion,period,lasting,over,finding,may,first,observation,solids,Our,understanding,controlling,demonstrate,possible,this,commonly,viewed,adverse,into,novel,electronic,applications,such,patterning,self,destructive,memory,energy,storage

AB值：

0.574929

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