Colloquium: “Spin Response of Hybrid Organic-Inorganic Halide Perovskites” — November 11, 2021 at 4 PM
Dr. Z. Valy Vardeny
Distinguished Professor
Physics And Astronomy
The University of Utah
Salt Lake City, UT
Thursday, November 11, 2021, 4 PM
George P. Williams, Jr. Lecture Hall, (Olin 101)
Video Link will be available if needed
To obtain the video conference link, contact wfuphys@wfu.edu
Welcome Back to in-person Colloquiums!
A reception will be held in Olin Lounge* at 3:30 PM prior to the colloquium. All interested persons are cordially invited to attend.
* We encourage all to wander out to the front entrance of the building or up to the Observatory Deck on the 3rd floor to enjoy their refreshments.
ABSTRACT
The field of thin-film photovoltaics has been recently enriched by the introduction of the 2D and 3D hybrid organic inorganic lead halide perovskites (HOIPs) as absorber materials, which allow low-cost synthesis of solar cells with efficiencies exceeding 22%. In addition, it has been shown that these compounds may be effective active layers in spintronics applications [1] due to their large spin orbit coupling [2], Rashba effect in the continuum bands [3], and efficient luminescence emission. More recently chirality has been introduced in 2D-HOIP via chiral organic moieties [4], which has brought novel physics and myriad of spin-optoelectronic applications [5]. The impact of the crystal structure especially regarding the inversion symmetry, and the dimensionality on the optoelectronic and spin response properties of these compounds has been the focus of intense research at the present time. I will briefly outline notable achievements to date, describe the unique attributes of these perovskites that has led to their rapid emergence as serious candidates for spintronics applications, and specifically discuss spin-optoelectronic devices based on chiral 2D-HOIP [6].
[1] Wang et al. Nat. Commun. 10, 129 (2019).
[2] Zhang et al. Nat. Phys. 11, 427 (2015); Odenthal et al. Nat. Phys. 13, 894 (2017).
[3] Zhai et al. Sci. Adv. 3, e1700704 (2017); Liu et al. Nat. Commun. 11, 323 (2020).
[4] Long et al. Nat. Phot. 12, 528 (2018).
[5] Lu et al. Sci. Adv. 5, eaay0571 (2019); Wang et al. ACS Nano. 15, 588 (2021).
[6] Kim et al. Science 371, 1129 (2021).
Professional Website: https://faculty.utah.edu/u0027991-ZEEV_VALENTINE_VARDENY/teaching/index.hml
