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Epitaxial Growth of AlGaN Thin Films by MOCVD and Applications in Ultraviolet Emitters

Speaker：GUO Wei,The Ningbo Institute of Industrial Technology (CNITECH) of the Chinese Academy of Sciences (CAS)
　　Time： Friday,2:00p.m.,29th March
　　Place： A718
　　Abastract:
　　Aluminum-gallium-nitride (AlGaN) alloys can emit light covering the spectrum from 210 to 360 nm, which can be widely used in solid state ultraviolet emitters. However, compared to InGaN-based blue LED counterp...

Mar 26, 2019
New Regimes for In-Device Characterization of Thin-Film Solar Cells Using Extraction Current Transients

Speaker:Ronald Osterbacka,Abo Akademi University
　　Time:Thursday,9:30a.m.,28th March
　　Place:A718
　　Abstract:
　　We have extended the analytical framework of the charge extraction by linearly increasing voltage (CELIV) theory taking the effect of built-in voltage, diffusion and band-bending into account. By doing so we have been able to extend the CELIV into new regimes, namely for metal...

Mar 26, 2019
Flat-Band Materials

Speaker：Prof.LIUfeng,The University of Utah
　　Time：Tuesday,10:00a.m.,22nd Janurary
　　Place：Shangshan yuan 201
　　Abstract:Unlike a localized state induced by defect in a crystalline solid, the so-called flat band is truly a Bloch state but yet without band dispersion. It arises from destructive interference of Bloch wave functions, independent of the single-particle crystalline Hamilton...

Jan 21, 2019
In-situ TEM Studies on Nanomaterials for Electronics Applications

Speaker：Dr.Liao zhongquan
　　Time： Monday,10:00a.m.,7th January
　　Place： A718
　　Abstract：In-situ transmission electron microscopy (TEM) is a technique where a TEM tool is used to monitor a sample in real time. It provides kinetic information on a material under certain stimuli. The fast development in the microscopy instrumentation advances in-situ TEM into a fast-growing, increasing i...

Jan 04, 2019

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