研究目的
To develop a high-performance large area cesium lead bromide (CsPbBr3) perovskite light-emitting diodes (PeLEDs) through controlled growth of CsPbBr3 emission layer using a hybrid additive in the CsPbBr3 precursor solution.
研究成果
The use of a CsPbBr3 precursor solution with a hybrid additive of PEO and Cs2CO3 significantly improves the performance of large area PeLEDs by suppressing structural defects and non-radiative recombination, and by improving electron-hole current balance. This approach demonstrates practical interest for applications in solution processable all-inorganic large area PeLEDs.
研究不足
The study focuses on the impact of a hybrid additive on the performance of large area CsPbBr3 PeLEDs but does not explore the long-term stability or scalability of the fabrication process for industrial applications.
1：Experimental Design and Method Selection:
The study involved the preparation of CsPbBr3 precursor solutions with and without hybrid additives (PEO and Cs2CO3) for the fabrication of PeLEDs. The performance of these devices was compared to understand the impact of the hybrid additive on the structural and morphological properties of the CsPbBr3 emission layer.
2：Sample Selection and Data Sources:
The samples were prepared using ITO/glass substrates, with CsPbBr3 perovskite layers formed on PEDOT:PSS HTL surfaces using different precursor solutions.
3：List of Experimental Equipment and Materials:
Equipment included a spin-coater for film deposition, SEM for morphological analysis, XRD for structural analysis, and various spectrometers for optical and electrical characterization. Materials included PbBr2, CsBr, DMSO, PEO, and Cs2CO
4：Experimental Procedures and Operational Workflow:
The CsPbBr3 precursor solutions were prepared and used to fabricate PeLEDs with a layer structure of ITO/PEDOT:PSS/CsPbBr3/TPBi/LiF/Al. The devices were characterized for their performance.
5：Data Analysis Methods:
The data were analyzed using SEM, XRD, UV-visible absorption spectroscopy, photoelectron spectroscopy, and electrical impedance spectroscopy to understand the impact of the hybrid additive on device performance.
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