10.1021/acsanm.9b01857.s001
Anna Jancik Prochazkova
Anna
Jancik Prochazkova
Yolanda Salinas
Yolanda
Salinas
Cigdem Yumusak
Cigdem
Yumusak
Markus Clark Scharber
Markus Clark
Scharber
Oliver Brüggemann
Oliver
Brüggemann
Martin Weiter
Martin
Weiter
Niyazi Serdar Sariciftci
Niyazi Serdar
Sariciftci
Jozef Krajcovic
Jozef
Krajcovic
Alexander Kovalenko
Alexander
Kovalenko
Controlling Quantum Confinement in Luminescent Perovskite
Nanoparticles for Optoelectronic Devices by the Addition of Water
American Chemical Society
2020
32 mol equiv
nanoparticle
exhibit chemical tunability
solution
Controlling Quantum Confinement
perovskite lattice growth
photoluminescence quantum yields
method
metal halide PNPs
PLQY
preparation
bromide
Luminescent Perovskite Nanoparticles
quantum confinement effect
optoelectronic devices
2020-01-17 16:34:19
Journal contribution
https://acs.figshare.com/articles/journal_contribution/Controlling_Quantum_Confinement_in_Luminescent_Perovskite_Nanoparticles_for_Optoelectronic_Devices_by_the_Addition_of_Water/11638173
Here,
a simple method for controlling the size of the perovskite
nanoparticles (PNPs) during preparation is reported. Metal halide
PNPs have great potential for application in optoelectronic devices,
such as light-emitting diodes, lasers, photodetectors, etc. They have
exceptionally high photoluminescence quantum yields (PLQYs) and exhibit
chemical tunability for versatile modifications of the perovskite
structural composition, enabling the synthesis of nanoparticles with
controlled size, shape, and optical properties. In this work, methylammonium
lead bromide PNPs were prepared using a hygroscopic stabilizing ligand,
tert-butoxycarbonyl-Lysine (tboc-Lysine). Water was used as an additive
in the precursor solution, which resulted in the formation of highly
mobile species and, thus, the nhancement of perovskite lattice growth.
This method allowed the preparation of PNPs with controlled size between
4 and 7 nm. The quantum confinement effect led to a fine-tuned optical
band gap of the nanoparticles. Increasing the amount of water added
from 0 to 32 mol equiv with respect to Lead(II) bromide (PbBr<sub>2</sub>) increased the PLQY to 70% in colloidal solutions and to
87% in thin films. Therefore, because of control over the size and
high luminescent yields, the above-mentioned nanoparticles are targeted
for use in optoelectronic devices.