Electronic structure and chemical reaction of Ca deposition on regioregular poly(3-hexylthiophene) surfaces  

作　　者：ZHAO Wei GUO YuXian FENG XueFei ZHANG Liang ZHANG WenHua ZHU JunFa 

机构地区：[1]National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230029, China

出　　处：《Chinese Science Bulletin》2009年第11期1978-1982,共5页

基　　金：Supported by the National Natural Science Foundation of China (Grant No. 20773111);Scientific Research Foundation for Returned Scholars,Ministry of Education of China;Program for New Century Excellent Talents in University (NCET);Start-up Funding of the University of Science and Technology of China

摘　　要：Conjugated polymer, regioregular poly(3-hexylthiophene) (rr-P3HT), films were prepared by spin-coating the rr-P3HT chloroform solution onto clean silicon wafer surfaces. The chemical re-action and electronic structure of Ca deposition on rr-P3HT surfaces were in situ investigated by synchrotron radiation photoemission spectroscopy (SRPES) and X-ray photoemission spectros-copy (XPS). Upon Ca deposition, Ca-induced band bending of rr-P3HT is observed. In addition, Ca atoms preferentially react with S atoms of rr-P3HT. No obvious reaction between Ca and C atoms can be found. Through the investigation of the evolution of valence band spectra and secondary electron cut-off of rr-P3HT during the process of Ca deposition, an energy level alignment diagram at the Ca/rr-P3HT interface is derived.Conjugated polymer, regioregular poly（3-hexylthiophene） （rr-P3HT）, films were prepared by spin-coating the rr-P3HT chloroform solution onto clean silicon wafer surfaces. The chemical re- action and electronic structure of Ca deposition on rr-P3HT surfaces were in situ investigated by synchrotron radiation photoemission spectroscopy （SRPES） and X-ray photoemission spectros- copy （XPS）. Upon Ca deposition, Ca-induced band bending of rr-P3HT is observed. In addition, Ca atoms preferentially react with S atoms of rr-P3HT. No obvious reaction between Ca and C atoms can be found. Through the investigation of the evolution of valence band spectra and secondary electron cut-off of rr-P3HT during the process of Ca deposition, an energy level alignment diagram at the Ca/rr-P3HT interface is derived.

关 键 词：化学反应 表面清洁 电子结构 钙沉积 X射线光电子光谱 同步辐射光电子能谱 X射线光电子能谱 共轭聚合物 

分 类 号：O643.1[理学—物理化学] U483.07[理学—化学]