Excellent Color Quality of White-Light-Emitting Diodes by Embedding Quantum Dots in Polymers Material

This study employs the polyfluorene composite (called Green B) with several colors of quantum dots to generate the high-color-rendering index (CRI) white LEDs. The Green B polymer is a good candidate to manufacture the hybrid w-LED because of its good quantum efficacy. The hybrid w-LEDs are fabricat...

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Bibliographic Details
Published in:IEEE journal of selected topics in quantum electronics 2016-01, Vol.22 (1), p.35-41
Main Authors: Huang-Yu Lin, Sheng-Wen Wang, Chien-Chung Lin, Kuo-Ju Chen, Hau-Vei Han, Zong-Yi Tu, Hsien-Hao Tu, Teng-Ming Chen, Min-Hsiung Shih, Po-Tsung Lee, Chen, Huang-Ming Philip, Hao-Chung Kuo
Format: Article
Language:English
Subjects:
Color
Light emitting diodes
light-emitting diodes (LEDs)
Phosphors
Photonics
Plastics
Quantum dots
quantum dots (QDs)
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Summary:This study employs the polyfluorene composite (called Green B) with several colors of quantum dots to generate the high-color-rendering index (CRI) white LEDs. The Green B polymer is a good candidate to manufacture the hybrid w-LED because of its good quantum efficacy. The hybrid w-LEDs are fabricated by the mixing of Green B with yellow quantum dots and red quantum dots or orange quantum dots to obtain the correlated color temperatures of 3500 and 5500 K. The use of the hybrid polymer/QDs w-LEDs is proved to be beneficial as QD w-LEDs can improve the CRI up to 90 in 3500 K. The luminous efficiency of such devices can be as high as 17.2l m/W.
ISSN:1077-260X
1558-4542
DOI:10.1109/JSTQE.2015.2441291