Effective Blue Light-Absorbing AuAg Nanoparticles in InP Quantum Dots-Based Color Conversion

In typical color-by-blue mode-based quantum dot (QD) display devices, only part of the blue excitation light is absorbed by QD emitters, thus it is accompanied by the leakage of blue light through the devices. To address this issue, we offer, for the first time, the applicability of AuAg alloy nanop...

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Bibliographic Details
Published in:Materials 2022-11, Vol.15 (23), p.8455
Main Authors: Yeo, Hyo-Jin, Yoon, Suk-Young, Jo, Dae-Yeon, Kim, Hyun-Min, Kwak, Jeonghun, Kim, Sung-Phil, Kim, Myung-Joon, Yang, Heesun
Format: Article
Language:English
Subjects:
Alloys
Color
Display devices
Electromagnetic absorption
Emitters
Ethanol
Excitation
Fluorescence
Gold
Gold base alloys
Indium phosphides
Leakage
Light emitting diodes
Nanoalloys
Nanoparticles
Polymer films
Polymers
Quantum dots
Silver
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Summary:In typical color-by-blue mode-based quantum dot (QD) display devices, only part of the blue excitation light is absorbed by QD emitters, thus it is accompanied by the leakage of blue light through the devices. To address this issue, we offer, for the first time, the applicability of AuAg alloy nanoparticles (NPs) as effective blue light absorbers in InP QD-based color-by-blue platforms. For this, high-quality fluorescent green and red InP QDs with a double shell scheme of ZnSe/ZnS were synthesized and embedded in a transparent polymer film. Separately, a series of Au/Ag ratio-varied AuAg NPs with tunable plasmonic absorption peaks were synthesized. Among them, AuAg NPs possessing the most appropriate absorption peak with respect to spectral overlap with blue emission are chosen for the subsequent preparation of AuAg NP polymeric films with varied NP concentrations. A stack of AuAg NP polymeric film on top of InP QD film is then placed remotely on a blue light-emitting diode, successfully resulting in systematically progressive suppression of blue light leakage with increasing AuAg NP concentration. Furthermore, the beneficial function of the AuAg NP polymeric overlayer in mitigating undesirable QD excitation upon exposure to ambient lights was further examined.
ISSN:1996-1944
1996-1944
DOI:10.3390/ma15238455