VIỆN VẬT LÝ

Abstract:Hybrid organic-inorganic perovskite materials have been studied since 1970s, but they only attracted strong attention in the research community after having been applied in solar cells[1]. By possessing simultaneously important properties, such as (i) high light absorption (ii) band gap tunability (iii) easy free carrier generation from photon absorption and (iv) balanced electron-hole transport, these materials have yielded an unprecedented increase of solar cells efficiency during a very short period of time[2]. Recently, these materials have refreshed strong attention by going two-dimensional with the use of larger organic cations and different organic-metal molar ratio[3]. These two-dimensional materials exist intrinsically in the crystalline structure by arranging metal halide octahedra in a particular manner. In this seminar, a summary of two-dimensional organo-metal halide perovskites will be presented, with applications in optoelectronics and light-matter coupling. Some recent results of our research group and development direction in synthesizing and applying these two-dimensional materials will be shown. Finally, a huge opportunity in fundamental research for terahertz lasing will be discussed.

[1]A. Kojima, K. Teshima, Y. Shirai, T. Miyasaka, Organometal halide perovskites as visible-light sensitizers for photovoltaic cells, J. Am. Chem. Soc. 131 (2009) 6050–6051.

[3]M.I. Saidaminov, O.F. Mohammed, O.M. Bakr, Low-dimensional-networked metal halide perovskites: the next big thing, ACS Energy Lett. 2 (2017) 889–896

Nano and Energy Center, VNU University of Science

Thời gian/ Time:10g00, Thứ tư, 15-05-2019

Địa điểm/ Venue:Phòng 62, nhà 2H, Viện Vật lý, 18 Hoàng Quốc Việt, Hà Nội