研究目的
To increase the luminescent efficiency of perovskite light-emitting diodes (PeLEDs) by using a modified two-step deposition method combined with an interdiffusion process without additional solvent engineering or additive molecules.
研究成果
The modified two-step deposition method combined with an interdiffusion process significantly increased the luminescent efficiency of PeLEDs, achieving the highest current efficiency among reported 3D PeLEDs fabricated by the two-step deposition method based on MAPbBr3 without any post-treatment and additives.
研究不足
The study focuses on MAPbBr3-based PeLEDs and does not explore other perovskite materials or deposition methods.
1：Experimental Design and Method Selection:
A modified two-step deposition method was used to fabricate MAPbBr3 polycrystalline films with nanosized grains and low electronic disorder.
2：Sample Selection and Data Sources:
MAPbBr3 films were fabricated and analyzed for their optical and electrical properties.
3：List of Experimental Equipment and Materials:
Indium tin oxide (ITO), PEDOT:PSS, tetrafluoroethylene-perfluoro-3,6-dioxa-4-7-octene-sulfonic acid copolymer (PFI), PbBr2, MABr, TPBi, LiF, Al.
4：Experimental Procedures and Operational Workflow:
The films were fabricated by spin-coating PbBr2 and MABr solutions sequentially, followed by annealing and encapsulation.
5：Data Analysis Methods:
Temperature-dependent UV-Vis absorption analysis, XPS depth profile, UPS measurement, and current-voltage-luminance characteristics were used to analyze the films.
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