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July 23-25, 2018 | Moscow, Russia
Materials Science and Engineering
International Conference on
Journal of Materials Science and Nanotechnology | Volume 2
Perovskitesemiconductorshavebeenreceivedgreatattention
due to their potential application in photonic devices, such
as laser, LED, solar cell. The perovskite solar cell conversion
efficiency is reported up to about 22%. However, there is few
reports on the investigation of the k.p band structure of cubic
CsSnBr 3 perovskite nanoplatelets. In this work, we extracted
the band parameters from the first-principles calculation of the
cubic CsSnBr 3 perovskite. The Luttinger parameters γ1 =10.22,
γ2 =4.32, and γ3=1.73 were obtained. Using the obtained
parameters, we developed an 8-band k.p method to calculate
the optical absorption spectrum of the cubic CsSnBr3 perovskite
nanoplatelet with different layer thickness (4 to 8 MLs). The
bulk inversion asymmetry was taken into consideration in
our model. The energy splitting was observed at non-zero k
point (k=0 is the R point). The exciton effect was included in
the absorption spectrum simulation. The TE and TM mode
exciton enhanced absorption spectrum of CsSnBr3 NPL at room
temperature are simulated and obtained. The results could be
useful to understand the perovskite based photonic devices.
Speaker Biography
W J Fan received his degree in electrical engineering from National University of
Singapore, in 1997. He is an Associate Professor in Nanyang Technological University.
He authored/co-authored over 130 refereed journal papers and over 100 conference
presentations including 9 plenary/invited talks. According to SCI (Web of Science),
the total external citations > 2100 times, his H-index is 22. He co-authored two book
chapters. He was awarded JAP outstanding author in 2013. The granted research
funding > S$3.9 M from Moe, Astar, Darpa(USA) and Nsg(Japan) as PI/Co-PI. He
graduated > 8 PhD students as Main/Co-supervisor. He is the Founder and Vice
President of International Optofluidics Organization since 2016. He served as Chair
of Symposium B of the 9th International Conference on Materials for Advanced
Technologies, Singapore 2017. He is the main editor of Procedia Engineering - Journal
of Elsevier (for ICMAT 2017 Symposium B).
e:
W J Fan
Nanyang Technological University, Singapore
Band structures and optical properties of cubic CsSnBr 3 Perovskite Nanoplatelets