Synthesis of ultra-narrow PbTe nanorods with extremely strong quantum confinement  

作　　者：Lu Han Honghua Fang Chunmiao Du Jianxia Sun Youyong Li Wanli Ma 

机构地区：[1]Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou, 215123, China [2]Zernike Institute for Advanced Materials University of Groningen, Nijenborgh4, Groningen, 9747AG, the Netherlands

出　　处：《Journal of Materials Science & Technology》2019年第5期703-710,共8页材料科学技术（英文版）

基　　金：financially supported by the National Key Research Projects (No. 2016YFA0202402);the Natural Science Foundation of Jiangsu Province of China (No. BK20170337);the National Natural Science Foundation of China (No. 61674111);“111” projects;the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD);L. Han thanks State-Sponsored Scholarship for Graduate Students from China Scholarship Council (No. 201606920064)

摘　　要：Monodisperse, high-quality, ultra-narrow PbTe nanorods were synthesized for the first time in a one-pot, hot-injection reaction using trans-2-decenoic acid as the agents for lead precursors and tris(diethylamino)phosphine telluride together with free tris(diethylamino)phosphine as the telluride precursors. High monomer reactivity, rapid nucleation and fast growth rate derived from the new precursors led to the anisotropic growth of PbTe nanocrystals at low reaction temperatures(<150℃). In addition, the aspect ratio of PbTe nanorods could be largely adjusted from 4 to 15 by tuning the Pb to Te precursor molar ratio and reaction temperatures. Moreover, the synthesized ultra-narrow PbTe nanorods exhibited extremely strong quantum confinement and presented unique optical properties. We revealed that the diameter and length of PbTe nanorods could significantly affect their optical properties, which potentially offer them new opportunities in the application of optoelectronic and thermoelectric devices and make them desired subjects for multiple exciton generation and other fundamental physics studies.Monodisperse, high-quality, ultra-narrow PbTe nanorods were synthesized for the first time in a one-pot, hot-injection reaction using trans-2-decenoic acid as the agents for lead precursors and tris(diethylamino)phosphine telluride together with free tris(diethylamino)phosphine as the telluride precursors. High monomer reactivity, rapid nucleation and fast growth rate derived from the new precursors led to the anisotropic growth of PbTe nanocrystals at low reaction temperatures(<150℃). In addition, the aspect ratio of PbTe nanorods could be largely adjusted from 4 to 15 by tuning the Pb to Te precursor molar ratio and reaction temperatures. Moreover, the synthesized ultra-narrow PbTe nanorods exhibited extremely strong quantum confinement and presented unique optical properties. We revealed that the diameter and length of PbTe nanorods could significantly affect their optical properties, which potentially offer them new opportunities in the application of optoelectronic and thermoelectric devices and make them desired subjects for multiple exciton generation and other fundamental physics studies.

关 键 词：COLLOIDAL semiconductor NANOCRYSTALS PBTE NANORODS Optical properties 

分 类 号：TG[金属学及工艺]