Jump to main content
Jump to site search
PLANNED MAINTENANCE Close the message box

Scheduled maintenance work on Wednesday 22nd May 2019 from 11:00 AM to 1:00 PM (GMT).

During this time our website performance may be temporarily affected. We apologise for any inconvenience this might cause and thank you for your patience.



Strong Thickness-Dependent Quantum Confinement in All-inorganic Perovskite Cs2PbI4 with Ruddlesden-Popper Structure

Abstract

In recent years, two-dimensional (2D) organic-inorganic perovskites have been attracted considerably attention as the unique performance and enhanced stability for the photovoltaic solar cells or photoluminescent device. However, how the two-dimensionality affects the photoelectric properties of all-inorganic perovskites remains unclear. In this work, the electronic and optical properties including band structures, carrier mobility, optical absorption spectra and exciton-binding energies for the all-inorganic perovskite Cs2PbI4 with Ruddlesden-Popper (RP) structure are investigated systemically by using density functional theory with spin orbit coupling (SOC) effect. The calculated results demonstrate the thickness-dependent of electronic properties in the all-inorganic 2D RP perovskite Cs2PbI4 and their carrier mobility which is comparable to that of CsPbI3 thin films. The exciton-binding energies of perovskite Cs2PbI4 with RP structure increase with the decrease of number of layers. Besides, the value of exciton-binding energiey for monolayer (181.70 meV) more than 3 times larger than that of CsPbI3 (59.12 meV). Moreover, the calculated results show that two dimensional layered Ruddlesden-Popper perovskite Cs2PbI4 may be not a good material for photovoltaic applications due to their low carrier mobility and poor visible light absorption, but may be a good material for light-emission applications due to their larger thickness-dependent exciton binding energy. Our work would provide a theoretical basis for other ultrathin two-dimensional Perovskite materials with potential application for photoluminescent device or solar absorbers.

Back to tab navigation

Supplementary files

Publication details

The article was received on 29 Apr 2019, accepted on 15 May 2019 and first published on 16 May 2019


Article type: Paper
DOI: 10.1039/C9TC02267H
J. Mater. Chem. C, 2019, Accepted Manuscript

  •   Request permissions

    Strong Thickness-Dependent Quantum Confinement in All-inorganic Perovskite Cs2PbI4 with Ruddlesden-Popper Structure

    Y. Ding, Q. Zhao, Z. Yu, Y. Zhao, B. Liu, P. He, H. Zhou, K. Li, S. Yin and M. Cai, J. Mater. Chem. C, 2019, Accepted Manuscript , DOI: 10.1039/C9TC02267H

Search articles by author

Spotlight

Advertisements