典型文献
Centimeter-scale perovskite SrTaO2N single crystals with enhanced photoelectrochemical performance
文献摘要：
Large-scale single crystals have potential applications in many fields,such as in ferroelectric and photo-electric energy conversion devices.Perovskite oxynitrides have also attracted attention in photoelectro-chemical water splitting systems because of their high theoretical solar-to-hydrogen efficiencies.Nevertheless,the synthesis of perovskite oxynitride single crystals requires the coupling of cation exchange and ammonization processes,which is exceptionally challenging.The present study demon-strates an inorganic vapor method that provides,for the first time ever,high-quality epitaxial perovskite SrTaO2N single crystals on the centimeter scale.Assessments using Raman spectroscopy,crystal structure analysis and density functional theory determined that the conversion mechanism followed a topotactic transition mode.Compared with conventional SrTaO2N particle-assembled films,the SrTaO2N single crystals made in this work were free of interparticle interfaces and grain boundaries,which exhibited extremely high performance during photoelectrochemical water oxidation.In particular,these SrTaO2N single crystals showed the highest photocurrent density at 0.6 V vs.RHE(1.20 mA cm-2)and the highest photocurrent filling factor(47.6％)reported to date,together with a low onset potential(0.35 V vs.RHE).This onset potential was 200 mV less than that of the reported in situ SrTaO2N film,and the photocurrent fill factor was improved by 2 to 3 times.
文献关键词：
中图分类号：
作者姓名：
Xiaoming Xu;Wenjing Wang;Yuanming Zhang;Yong Chen;Huiting Huang;Tao Fang;Yang Li;Zhaosheng Li;Zhigang Zou
作者机构：
Collaborative Innovation Center of Advanced Microstructures,National Laboratory of Solid State Microstructures,College of Engineering and Applied Sciences,Nanjing University,Nanjing 210093,China;Jiangsu Key Laboratory of Nano Technology,Nanjing University,Nanjing 210093,China;School of Mathematics and Physics,Jiangsu University of Technology,Changzhou 213001,China
文献出处：
引用格式：
[1]Xiaoming Xu;Wenjing Wang;Yuanming Zhang;Yong Chen;Huiting Huang;Tao Fang;Yang Li;Zhaosheng Li;Zhigang Zou-.Centimeter-scale perovskite SrTaO2N single crystals with enhanced photoelectrochemical performance)[J].科学通报（英文版）,2022(14):1458-1466
A类：
SrTaO2N,oxynitrides,oxynitride,ammonization
B类：
Centimeter,scale,perovskite,single,crystals,enhanced,photoelectrochemical,performance,Large,have,potential,applications,many,fields,such,ferroelectric,energy,conversion,devices,Perovskite,also,attracted,attention,water,splitting,systems,because,their,theoretical,solar,hydrogen,efficiencies,Nevertheless,synthesis,requires,coupling,exchange,processes,which,exceptionally,challenging,present,study,demon,strates,inorganic,vapor,method,that,provides,first,quality,epitaxial,centimeter,Assessments,using,Raman,spectroscopy,structure,analysis,density,functional,theory,determined,mechanism,followed,topotactic,transition,mode,Compared,conventional,assembled,films,made,this,work,were,free,interparticle,interfaces,grain,boundaries,exhibited,extremely,during,oxidation,In,particular,these,showed,highest,photocurrent,RHE,mA,filling,reported,date,together,onset,This,was,mV,than,situ,improved,by,times
AB值：
0.550786
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