[seminar] Seminar na IRB-u: "Halide perovskite materials and devices"

[Mihael Makek]

Poštovane kolegice i kolege,

proslijeđujem Vam obavijest o seminaru koji će se održati Prof. Aleksandra
B. Djurišić, Dept. of Phyiscs, Hong Kong University (HKU), Hong Kong.

Naslov predavanja je "Halide perovskite materials and devices" i održat će
se u utorak, 18. prosinca 2018. godine, s početkom u 10:30 sati, u
predavaonici 3. krila Instituta Ruđer Bošković.


Kratke crtice iz životopisa Prof. A. B. Djurišić, kao i sažetak
predavanja, nalaze se u nastavku ovog maila.


Short biography
----------------
Aleksandra B. Djurišić is a full professor at Dept. of Phyiscs, Hong Kong
Univeristy (HKU). Currently she is also the Vice-dean of Hong Kong
University.
Her research interests include nanomaterials, wide-bandgap semiconductors,
and organic materials, and their applications in areas related to energy
and environment, such as photocatalysis, antimicrobial materials, solar
cells, and batteries.
She has published 340 research articles and has been cited over 14500
times. Her h-index is 54.


Halide perovskite materials and devices
-----------------------------------------
Perovskite solar cells have been attracting increasing interest due to
their rapidly rising record power conversion efficiencies (PCE). Since the
initial reports on solid state solar cells in 2012 with PCE of ~10%, the
current record PCE is 23.3%, outperforming well established inorganic thin
film technologies, such as CIGS and CdTe. Similarly, the efficiency of
perovskite LEDs operating at room temperature has increased from 0.0125%
in 2014 to ~20% today. Consequently, there is a huge interest in these
materials. While lots of work is devoted to the efficiency improvements
for both solar cells and LEDs, there is considerably less work done to
address a significant problem for both type of devices, namely the
material and device stability.
In this talk, the common 3D perovskite material CH3NH3PbI3 and its
stability issues will be discussed. Then, 2D and quasi-2D
Ruddlesden-Popper perovskite materials which enable improved ambient
stability and increased flexibility in tailoring the composition and
properties will be discussed. The relevant problems in controlling the
composition of the quasi-2D materials will be discussed, with implications
on the optical properties and device applications. Finally, examples of
device applications of quasi-2D materials will be given.