期刊
NANOMATERIALS
卷 12, 期 24, 页码 -出版社
MDPI
DOI: 10.3390/nano12244372
关键词
all-inorganic lead halide perovskite; quantum dot; blue emission; light-emitting diodes
类别
资金
- Natural Science Foundation of China [52002021]
- Engineering Research Center of Clinical Functional Materials and Diagnosis & Treatment Devices of Zhejiang Province [WIUCASK20005]
- Fundamental Research Funds for the Central Universities [FRF-IDRY-20-037]
This review focuses on the rapid development of light-emitting diodes (LEDs) based on all-inorganic lead halide perovskite quantum dots (PQDs), with particular emphasis on the challenges faced by blue-emitting PeQLEDs. The review summarizes strategies to improve device performance and provides suggestions and outlooks for future research directions of blue PeQLEDs.
Light-emitting diodes (LEDs) based on all-inorganic lead halide perovskite quantum dots (PQDs) have undergone rapid development especially in the past five years, and external quantum efficiencies (EQEs) of the corresponding green- and red-emitting devices have exceeded 23%. However, the blue-emitting devices are facing greater challenges than their counterparts, and their poor luminous efficiency has hindered the display application of PQD-based LEDs (PeQLEDs). This review focuses on the key challenges of blue-emitting PeQLEDs including low EQEs, short operating lifetime, and spectral instability, and discusses the essential mechanism by referring to the latest research. We then systematically summarize the development of preparation methods of blue emission PQDs, as well as the current strategies on alleviating the poor device performance involved in composition engineering, ligand engineering, surface/interface engineering, and device structural engineering. Ultimately, suggestions and outlooks are proposed around the major challenges and future research direction of blue PeQLEDs.
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