研究目的
Investigating the effects of a cocktail of multiple cations in inorganic halide perovskite towards efficient and highly stable blue light-emitting diodes.
研究成果
The multi-cation strategy significantly improves both the efficiency and stability of blue PeLEDs, with maximum EQE of 2.01% and maximum luminance of 4015 cd/m2 at 484 nm, and a half-lifetime over 300 min under continuous operation.
研究不足
The technical and application constraints include the challenge of realizing stable blue PeLEDs with high efficiency due to poor film quality and unreasonable device structure.
1：Experimental Design and Method Selection:
A cocktail strategy of multiple cations in inorganic perovskites is developed to improve the quality of the film synergistically.
2：Sample Selection and Data Sources:
A series of multi-cation perovskite films are fabricated and optimized.
3：List of Experimental Equipment and Materials:
Scanning electron microscope (SEM), X-ray diffraction (XRD), grazing-incidence wide-angle X-ray scattering (GIWAXS), photoluminescence (PL) measurements.
4：Experimental Procedures and Operational Workflow:
One-step hot-casting process without anti-solvent dropping was used to fabricate perovskite films.
5：Data Analysis Methods:
PL spectra and PLQY measurements, SEM images analysis, XRD patterns analysis.
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