徐翔星教授課題組在JACS發(fā)表研究論文
Heterostructural CsPbX3-PbS (X = Cl, Br, I) Quantum Dots with Tunable Vis-NIR Dual Emission
Zhang, XJ (Zhang, Xianju)[ 1 ] ; Wu, XX (Wu, Xianxin)[ 2 ] ; Liu, XY (Liu, Xiaoyu)[ 1 ] ; Chen, GY (Chen, Gaoyu)[ 1 ] ; Wang, YK (Wang, Yongkai)[ 1 ] ; Bao, JC (Bao, Jianchun)[ 1 ] ; Xu, XX (Xu, Xiangxing)[ 1 ]*（徐翔星） ; Liu, XF (Liu, Xinfeng)[ 2 ]*; Zhang, Q (Zhang, Qi)[ 4 ] ; Yu, KH (Yu, Kehan)[ 4 ] ; Wei, W (Wei, Wei)[ 4 ] ; Liu, JJ (Liu, Jingjing)[ 5,6 ] ; Xu, J (Xu, Jun)[ 5,6 ] ; Jiang, H (Jiang, Hua)[ 6,7 ] ; Wang, P (Wang, Peng)[ 6,7 ] ; Wang, X (Wang, Xun)[ 3 ]*
[ 1 ] Nanjing Normal Univ, Sch Chem & Mat Sci, Jiangsu Key Lab Biofunct Mat, Nanjing 210046, Peoples R China
[ 2 ] Chinese Acad Sci, Natl Ctr Nanosci & Technol, Key Lab Standardizat & Measurement Nanotechnol, Ctr Excellence Nanosci, Beijing 100190, Peoples R China
[ 3 ] Tsinghua Univ, Key Lab Organ Optoelect & Mol Engn, Dept Chem, Beijing 100084, Peoples R China
[ 4 ] Nanjing Univ Posts & Telecommun, Coll Elect & Opt Engn, Nanjing 210023, Peoples R China
[ 5 ] Nanjing Univ, Sch Elect Sci & Engn, Natl Lab Solid State Microstruct, Nanjing 210093, Peoples R China
[ 6 ] Nanjing Univ, Collaborat Innovat Ctr Adv Microstruct, Nanjing 210093, Peoples R China
[ 7 ] Nanjing Univ, Coll Engn & Appl Sci, Natl Lab Solid State Microstruct, Nanjing 210093, Peoples R China
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY，202003,142(9),4464-4471
Perovskite and chalcogenide quantum dots (QDs) are important nano semiconductors. It has been a challenge to synthesize heterostructural QDs combining perovskite and chalcogenide with tailorable photoelectronic properties. In this report, heterostructural CsPbX3-PbS (X = Cl, Br, I) QDs were successfully synthesized via a room temperature in situ transformation route. The CsPbX3-PbS QDs show a tunable dual emission feature with the visible and near-infrared (NIR) photoluminescence (PL) corresponding to CsPbX3 and PbS, respectively. Typically, the formation and evolution of the heterostructural CsPbBr3-PbS QDs with reaction time was investigated. Femtosecond transient absorption spectroscopy (TAS) was applied to illuminate the exciton dynamics in CsPbBr3-PbS QDs. The mild synthetic method and TAS proved perovskite to PbS energy transfer may pave the way toward highly efficient QD photovoltaic and optoelectronic devices.
文章鏈接：
https://pubs.acs.org/doi/abs/10.1021/jacs.9b13681
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