Herein, all-solution-processed and ambient air-stable perovskite light-emitting diodes (PeLEDs) based on organic–inorganic hybrid perovskite nanocrystals are fabricated. Uniform surface coverage of methylammonium lead bromide (MAPbBr3) perovskite nanocrystals fabricated under ambient air conditions is achieved by blowing nitrogen (N2) gas onto the surface of the perovskite–polymer-mixed precursor solution as it is being spin-coated and thus controlling the crystallization rate of the nanocrystals. To obtain uniform morphology, the experimental conditions are optimized, namely, the spin rate and N2 gas blowing start time. Finally, a spin rate of 5000 rpm (revolutions per minute) and N2 gas blowing for 10 s at 10 s after the start of spinning are found to be the optimal conditions. PeLEDs fabricated using the optimized N2 blowing conditions provide a high maximum luminance (L) of approximately 11 610 cd m−2 and a current efficiency of approximately 4.42 cd A−1 at an L of 2328 cd m−2 accompanied by excellent operational stability. The PeLEDs are not only fabricated on rigid glass substrates but also on polymeric and elastomeric substrates, which demonstrates their potential application as flexible and wearable devices.
|Journal||Physica Status Solidi (A) Applications and Materials Science|
|Publication status||Published - 2019 Nov 1|
Bibliographical noteFunding Information:
This research was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT & Future Planning (grant number: 2018R1A2B6001390).
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Surfaces and Interfaces
- Surfaces, Coatings and Films
- Electrical and Electronic Engineering
- Materials Chemistry