期刊
APPLIED PHYSICS LETTERS
卷 109, 期 6, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.4960662
关键词
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资金
- National Natural Science Foundation of China [51272084, 61306078, 61225018, 61475062]
- Jilin Province Key Fund [20140204079GX]
- NSF [1338346]
- BORSF LA
- Direct For Mathematical & Physical Scien
- Division Of Chemistry [1338346] Funding Source: National Science Foundation
High quantum yield, narrow full width at half-maximum and tunable emission color of perovskite quantum dots (QDs) make this kind of material good prospects for light-emitting diodes (LEDs). However, the relatively poor stability under high temperature and air condition limits the device performance. To overcome this issue, the liquid-type packaging structure in combination with blue LED chip was employed to fabricate the fluorescent perovskite quantum dot-based LEDs. A variety of monochromatic LEDs with green, yellow, reddish-orange, and red emission were fabricated by utilizing the inorganic cesium lead halide perovskite quantum dots as the color-conversion layer, which exhibited the narrow full width at half-maximum (<35 nm), the relatively high luminous efficiency (reaching 75.5 lm/W), and the relatively high external quantum efficiency (14.6%), making it the best-performing perovskite LEDs so far. Compared to the solid state LED device, the liquid-type LED devices exhibited excellent color stability against the various working currents. Furthermore, we demonstrated the potential prospects of all-inorganic perovskite QDs for the liquid-type warm white LEDs. Published by AIP Publishing.
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