Scalable and Blue Photoluminescence Emissions of (C4H9NH3)2PbBr4 2D Perovskite Fabricated by the Dip-Coating Method Using a Co-Solvent System

The improved efficiency of perovskite-related photovoltaic devices, such as light-emitting diodes (LEDs), is related to film uniformity, the compactness of each layer, and thickness. Herein, we improved the traditional single-solvent, solution-processed method and developed a co-solvent method to pr...

Full description

Saved in:
Bibliographic Details
Published in:Crystals (Basel) 2022-03, Vol.12 (3), p.418
Main Authors: Chou, Chia-Man, Liu, Yuan-Tung, Wei, Pei-Ching, Li, Yi-Jhen, Kung, Yu-Han, Hsiao, Vincent K. S., Chu, Chih-Chien
Format: Article
Language:English
Subjects:
2D perovskite
Carrier lifetime
co-solvent
Crystal defects
Crystallization
Dimethylformamide
Dip coatings
Efficiency
Electric fields
Electrodes
Glass substrates
Immersion coating
Lasers
Light emitting diodes
Morphology
Optical microscopy
Optical properties
Perovskites
Photoluminescence
photoluminescence emission
Photovoltaic cells
Solvents
Thickness
Transistors
Ultraviolet detectors
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The improved efficiency of perovskite-related photovoltaic devices, such as light-emitting diodes (LEDs), is related to film uniformity, the compactness of each layer, and thickness. Herein, we improved the traditional single-solvent, solution-processed method and developed a co-solvent method to prepare a two-dimensional (2D) (C4H9NH3)2PbBr4 perovskite film for blue photoluminescence (PL) emissions. A poor film-forming uniformity was observed for the use of the single-solvent, dimethylformamide (DMF) method. In adding 1,2-dichlorobenzene (ODCB) of a smaller polarity to DMF, the co-solvent engineering dramatically changed the film-forming properties. Optical microscopy (OM), scanning electron microscopy (SEM), X-ray diffractometer (XRD), and time-resolved PL (TR-PL) spectroscopy analyses confirmed that the perovskite film prepared by the co-solvent system had a good crystallinity, fewer defects, and a longer carrier lifetime. These experimental results show a simple, scalable (1.23 × 1.23 cm2), and stable reproducibility method for preparing 2D perovskite of 415 nm wavelength PL emissions that might be beneficial for the development of ultraviolet (UV) photodetectors, blue LEDs, and high-resolution displays.
ISSN:2073-4352
2073-4352
DOI:10.3390/cryst12030418