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Stoichiometry-Controlled InP-Based Quantum Dots: Synthesis, Photoluminescence, and Electroluminescence
Abstract
We introduce stoichiometry control within both core and shell regions of InP/ZnSe/ZnS core/shell/shell quantum dots (QDs) to advance their properties drastically, approaching those of state-of-the-art CdSe-based QDs. The resulting QDs possess near-unity photoluminescence quantum yield, monoexponential decay dynamics, narrow line width, and nonblinking at a single-dot level. Quantum-dot light-emitting diodes (QLEDs) with the InP/ZnSe/ZnS core/shell/shell QDs as emitters exhibit a peak external quantum efficiency of 12.2% and a maximum brightness of >10 000 cd m –2, greatly exceeding those of the Cd/Pb-free QLEDs reported in literature. These results pave the way toward Cd/Pb-free QDs as outstanding optical and optoelectronic materials.
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Colloidal Alloyed Quantum Dots with Enhanced Photoluminescence Quantum Yield in the NIR-II Window
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Metadata
- Authors
- Li, Y., Hou, X., Dai, X., Yao, Z., Lv, L., Jin, Y., & Peng, X.
- Venue
- Journal of the American Chemical Society
- Publisher
- American Chemical Society (ACS)
- Published
- 2019-04-09
- Volume
- 141
- Issue
- 16
- Pages
- 6448-6452
- ISSN
- 0002-7863 (ISSN-L)
- 1520-5126
- OpenAlex
- W2935883794
- Cited by
- 422
- References
- 34
- FWCI
- 18.58
- Type
- journal article
- Language
- en
- Open access
- closed
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