期刊
NANOTECHNOLOGY
卷 25, 期 22, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/0957-4484/25/22/225601
关键词
white lighting; composite film; non-Cd quantum dots; hydrophilic; hydrophobic
资金
- National Research Foundation of Korea (NRF) grant - Korea government (MSIP) [2013R1A2A2A01068158, 2011-0013377]
- Converging Research Center Program through the Ministry of Science, ICT and Future Planning, Korea [2013K000182]
- National Research Foundation of Korea [2011-0013377, 2010-50192] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Two types of non-Cd quantum dots (QDs)-In/Ga ratio-varied, green-to-greenish-yellow fluorescence-tuned Cu-In-Ga-S (CIGS) alloy ones, and red-emitting InP ones-are synthesized for use as down-converters in conjunction with a blue light-emitting diode (LED). Among a series of Ga-rich CI(1-x)G(x)S/ZnS core/shell QDs (x = 0.7, 0.8, and 0.9), CI(0.2)G(0.8)S/ZnS QD is chosen for the hydrophobic-to-hydrophilic surface modification via an in-situ ligand exchange and then embedded in a water-soluble polyvinyl alcohol (PVA). This free-standing composite film is utilized as a down-converter for the fabrication of a remote-type white QD-LED, but the resulting bi-colored device exhibits a cool white light with a limited color rendering index property. To improve white light qualities, another QD-polymer film of hydrophobic red InP/ZnS QD-embedding polyvinylpyrrolidone is sequentially stacked onto the CI(0.2)G(0.8)S/ZnS QD-PVA film, producing a unique dual color-emitting, flexible and transparent bilayered composite film. Tri-colored white QD-LED integrated with the bilayered QD film possesses an exceptional color rendering property through reinforcing a red spectral component and balancing a white spectral distribution.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据