Year: 2021
Type: article
Abstract: In most perovskite nanocrystal (PeNC)‐based optoelectronic and photonic applications, surface ligands inevitably lead to a donor–bridge–acceptor charge transfer configuration. In this article, we demonstrate successful modulation of electron transfer (ET) rates from all‐inorganic CsPbBr 3 PeNCs to mesoporous titanium dioxide films, by using different surface ligands including single alkyl chain oleic acid and oleylamine, cross‐linked insulating (3‐aminopropyl)triethoxysilane and aromatic naphthoic acid molecules as the ligand‐bridge. We systematically investigated the ET process through time‐resolved photoluminescence spectroscopy. Calculations verified the ligand‐bridge barrier effect of the three species upon the ET process. Transient absorption measurements excluded carrier‐delocalization effect of the naphthoic acid ligands and confirmed the bridge‐barrier effect. Our work provides a perspective for composable and appropriate ligands design for diverse practical purposes.
Source: Nanophotonics
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,662
OpenAlex ID: W3133605074