HKUEMS :: Event Details

Public Seminar of Physics PhD Candidate
posted by Department of Physics for HKU and Public
Event Type: Public Lecture/Forum/Seminar/Workshop/Conference/Symposium
Event Nature: Science & Technology

Event Details

Public Seminar of Physics PhD Candidate
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Optical Studies of Luminescence Mechanisms and Processes in Semiconductor Functional Nanostructures and Novel Materials

Speaker: Mr. Zhicheng SU

Abstract:

Novel semiconducting materials and functional nanostructures have been extensively explored due to their promising wide applications ranging from solar cells in spacecraft to LED display in cellphone. However, our current understanding on some physical mechanisms in these new materials and nanostructures is far from enough to support their rapid development.

In this study, we present comprehensive optical spectroscopic investigations of luminescence mechanisms and internal processes of carriers in several semiconductor functional nanostructures and novel materials, including GaInP based solar cell, coupled InGaN QW-QDs nanostructures, organic luminescent copper complexes and carbon nanodots. Meanwhile, theoretical analysis and modelling are also done to gain a deeper insight into the phenomena and underlying mechanisms. A generalized theoretical model has been developed to quantitatively describe the dispersive thermodynamics of localized carriers and their transient luminescence behaviors at different temperatures. In addition, phonon-assisted tunneling, phonon-electron coupling and thermally activated delayed fluorescence are also quantitatively analyzed.


Anyone interested is welcome to attend.

Date/Time15/11/2017 14:30-15:00
VenueRm 518, 5/F, Chong Yuet Ming Physics Building, HKU
LanguageEnglish

Registration Instruction

Registration is not required.

Contact Information

Should you have any enquiries, please feel free to contact Ms. Eva Wong by email at physdept@hku.hk or by phone at 2859 2360 or by fax at 2559 9152.