Diameter-dependent photoelectric performances of semiconducting carbon nanotubes/perovskite heterojunctions  

作　　者：Yayang Yu Wenke Wang Xiao Li Linhai Li Shilong Li Xiaojun Wei Weiya Zhou Jing Lin Yang Huang Huaping Liu 

机构地区：[1]School of Materials Science and Engineering,Hebei Key Laboratory of Boron Nitride Micro and Nano Materials,Hebei University of Technology,Tianjin 300130,China [2]Beijing National Laboratory for Condensed Matter Physics,Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China [3]Center of Materials Science and Optoelectronics Engineering,School of Physical Sciences,University of Chinese Academy of Sciences,Beijing 100049,China [4]Beijing Key Laboratory for Advanced Functional Materials and Structure Research,Beijing 100190,China [5]Songshan Lake Materials Laboratory,Dongguan 523808,China

出　　处：《Nano Research》2023年第11期12662-12669,共8页纳米研究（英文版）

基　　金：supported by the National Key Research and Development Program of China(Nos.2020YFA0714700 and 2018YFA0208402);the National Natural Science Foundation of China(Nos.51820105002,51872320,51472264,11634014,and 52172060);the Strategic Priority Research Program of the Chinese Academy of Sciences(No.XDB33030100);the Key Research Program of Frontier Sciences,CAS(No.QYZDBSSW-SYS028);the Youth Innovation Promotion Association of CAS(No.2020005).

摘　　要：The heterojunction of single-wall carbon nanotubes(SWCNTs)and perovskite quantum dots(QDs)shows excellent photodetection performances due to the combination of the advantages of high carrier mobility of SWCNTs and high absorption coefficient of perovskite QDs.However,the band structure of a SWCNT is determined by its atomic arrangement structure.How the structure of SWCNTs affects the photoelectric performance of the composite film remains elusive.Here,we systematically explored the diameter effect of SWCNTs with different bandgaps on the photodetection performances of SWCNTs/perovskite QDs heterojunction films by integrating semiconducting SWCNTs(s-SWCNTs)with different diameters with CsPbBr3 QDs.The results show that with an increase in diameter of s-SWCNTs,the heterojunction exhibits increasing responsivity(R),detectivity(D*),and faster response time.The great improvement in the optoelectronic performances of devices should be attributed to the higher carrier mobility of larger-diameter SWCNT films and the increasing built-in electric field at the heterojunction interfaces between larger-diameter SWCNTs and CsPbBr3 QDs,which enhances the separation of the photogenerated excitons and the transport of the resulted carriers in SWCNT films.

关 键 词：carbon nanotubes perovskite quantum dots diameter effect RESPONSIVITY DETECTIVITY 

分 类 号：TB383[一般工业技术—材料科学与工程]