期刊
ACS APPLIED MATERIALS & INTERFACES
卷 9, 期 46, 页码 40477-40487出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.7b14471
关键词
quantum dots; energy transfer; luminescence; perovskite; LED
资金
- Zhejiang Provincial Natural Science Foundation of China [LR15E020001]
- National Natural Science Foundation of China [51572065, 61372025, 51372172]
- 151 Talent's Projects in the Second Level of Zhejiang Province
Tunability of emitting colors of perovskite quantum dots (PQDs) was generally realized via composition/size modulation. Due to their bandgap absofption and ionic crystal features, the mixing of multiple PQDs inevitably suffers from reabsorption and anion-exchange effects. Herein, we address these issues with high-content Mn2+-doped CsPbCl3 PQDs that can yield blue-excitable orange Mn2+ emission benefited from exciton-to-Mn energy transfer and Cl-to-Br anion exchange. Silica-coating was applied to improve air stability of PQDs, suppress the loss of Mn2+, and avoid anion exchange between different PQDs. As a direct benefit of intense multicolor emissions from Mn2+-doped PQD@SiO2 solid phosphors, a prototype white light-emitting diode with excellent optical performance and superior light stability was constructed using green CsPbBr(3)pSiO(2) and orange Mn: CsPb(Cl/Br)(3)@SiO2 composites as color converters, verifying their potential applications in the field of optoelectronics.
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