Copy held by FIZ Karlsruhe; available from UB/TIB Hannover / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEDEGerman

Guoqing Xin (1516117)

Jian Shi (141852)

Jie Lian (634561)

Yiping Wang (1484218)

Yunfeng Shi (1516120)

The exploration of emerging materials
physics and prospective applications
of two-dimensional materials greatly relies on the growth control
of their thickness, phases, morphologies, and film–substrate
interactions. Though substantial progress has been made for the development
of two-dimensional films from conventional layered bulky materials,
particular challenges remain for obtaining ultrathin, single crystalline,
dislocation-free films from intrinsically non-van der Waals-type three-dimensional
materials. In this report, with the successful demonstration of single
crystalline ultrathin large-scale perovskite halide material, we reveal
and identify the favorable role of weak van der Waals film–substrate
interaction on the nucleation and growth of the two-dimensional morphology
out of nonlayered materials compared to conventional epitaxy. We also
show how the bonding nature of the three-dimensional material itself
affects the kinetic energy landscape of ultrathin film growth. By
studying the formation of fractal perovskites assisted with Monte
Carlo simulations, we demonstrate that the competition between the
van der Waals diffusion and surface free energy of the perovskite
leads to film thickening, suggesting that extra strategies such as
surface passivation may be needed for the growth of monolayer and
few-layer films

The Francis Crick Institute

Two-Dimensional van der Waals Epitaxy Kinetics in
a Three-Dimensional Perovskite Halide

Gurke, R.

Kernforschungsanlage Juelich G.m.b.H. (KFA) (Germany). Zentralinstitut fuer Angewandte Mathematik

Aachen Technische Hochschule (Germany)

OpenGrey Repository