学术报告

能源光电学术论坛(第14期)

来源:武汉光电国家研究中心    作者:    发布时间:2018年06月27日

Chemistry, Physics, and Optoelectronic Applications of Meta
Halide Perovskite Nanostructures


时 间:2018629日(星期五) 10:00 — 12:00

地 点:武汉光电国家研究中心A302

报告人:Song Jin 教授 (University of Wisconsin-Madison)

邀请人:唐江 教授


报告摘要:
The remarkable solar performance of lead halide perovskites can be attributed to their excellent
physical properties that present many mysteries, challenges, as well as opportunities. Better control
over the crystal growth of these fascinating materials and better understanding of their complex solid
state chemistry would further enhance their applications. Here I will first report new insights on the
crystal growth of perovskite materials and the solution growth of single crystal nanowires and
nanoplates of methylammonium (MA), formamidinium (FA), and all-inorganic cesium (Cs) lead
halides perovskites (APbX3) via a dissolution-recrystallization pathway, which might be driven by
screw dislocations. We also developed the vapor phase epitaxial growth of CsPbX3 perovskite
materials on different substrates and the van der Waals epitaxial heterostructures of 2D perovskites.
Moreover, chemical strategies to stabilize the metastable perovskite phases, such as FAPbI3 and
CsPbI3, have been developed by using surface ligands to manipulate the delicate thermodynamic and
kinetic balance between 3D and 2D layered perovskites. We demonstrated high performance room
temperature lasing with broad tunability of emission with these single-crystal perovskite nanowires.
The excellent properties of these single-crystal perovskite nanostructures of diverse families of
perovskite materials with different cations, anions, and dimensionality make them ideal for
fundamental physical studies of carrier transport and decay mechanisms, and for enabling high performance semiconductor lasers, LEDs, and other optoelectronic applications.



报告人介绍:
Prof. Song Jin received his B.S. in Chemistry from Peking University in 1997, Ph.D. in 2002 from
Cornell University under the direction of Prof. Francis J. DiSalvo and carried out his postdoctoral
research under the direction of Prof. Charles M. Lieber at Harvard University. Dr. Jin is interested in
the chemistry, physics and technological applications of nanoscale and solid-state materials. Dr. Jin
developed innovative synthesis of a variety of nanomaterials including metal chalcogenides, oxides,
silicides, and halide perovskites, and discovered and developed the screw dislocation-driven growth of
anisotropic nanomaterials. Building on the fundamental understanding of novel physical properties, Jin
advances the exploitation of (nano)materials for solar energy conversion, electrocatalysis, energy
storage, optoelectronics, nanospintronics, and biotechnology. A unifying theme of Jin’s energy research
is the focus on earth-abundant materials. Dr. Jin has authored or co-authored over 170 publications and
6 patents. He has been recognized with a NSF CAREER Award, a Research Corporation Cottrell
Scholar Award and as one of world’s top 35 innovators under the age of 35 (TR35 Award) by the MIT
Technology Review Magazine, the ACS ExxonMobil Solid State Chemistry Fellowship, and the Alfred
P.
Sloan Research Fellowship, U. of Wisconsin-Madison Vilas Associate Award and H. I. Romnes
Faculty Fellowship, and the ACS Inorganic Nanoscience Award. He also serves as a Senior Editor for
ACS Energy Letters.