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Title: Perovskite Transparent Conducting Oxide for the Design of a Transparent, Flexible, and Self-Powered Perovskite Photodetector
Authors:
; ; ; ; ; ; ; ; ; ; ; ; ;
Award ID(s):
1809520
Publication Date:
NSF-PAR ID:
10227048
Journal Name:
ACS Applied Materials & Interfaces
Volume:
12
Issue:
14
Page Range or eLocation-ID:
16462 to 16468
ISSN:
1944-8244
Sponsoring Org:
National Science Foundation
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  1. A line defect with metallic characteristics has been found in optically transparent BaSnO 3 perovskite thin films. The distinct atomic structure of the defect core, composed of Sn and O atoms, was visualized by atomic-resolution scanning transmission electron microscopy (STEM). When doped with La, dopants that replace Ba atoms preferentially segregate to specific crystallographic sites adjacent to the line defect. The electronic structure of the line defect probed in STEM with electron energy-loss spectroscopy was supported by ab initio theory, which indicates the presence of Fermi level–crossing electronic bands that originate from defect core atoms. These metallic line defects also act as electron sinks attracting additional negative charges in these wide-bandgap BaSnO 3 films.