Wide-range correlated color temperature light generation from resonant cavity hybrid quantum dot light-emitting diodes

Kuo Ju Chen; Chien Chung Lin; Hau Vei Han; Chia Yu Lee; Shih Hsuan Chien; Kuan Yu Wang; Sheng Huan Chiu; Zong Yi Tu; Jie Ru Li; Teng Ming Chen; Xiuling Li; Min Hsiung Shih; Hao Chung Kuo

doi:10.1109/JSTQE.2015.2404877

Wide-range correlated color temperature light generation from resonant cavity hybrid quantum dot light-emitting diodes

Kuo Ju Chen, Chien Chung Lin, Hau Vei Han, Chia Yu Lee, Shih Hsuan Chien, Kuan Yu Wang, Sheng Huan Chiu, Zong Yi Tu, Jie Ru Li, Teng Ming Chen, Xiuling Li, Min Hsiung Shih, Hao Chung Kuo

Research output: Contribution to journal › Article › peer-review

Abstract

This study presents extremely uniform colloidal quantum dot white light-emitting diodes (QD-WLEDs) that demonstrate a high color rendering index (CRI) and correlated color temperatures (CCTs) ranging from 2500 to 4500 K. Experimental results indicate that the structure of the distributed Bragg reflector (DBR) containing a stopband in the UV region enhances the intensity output of both monochromatic QD-LEDs and QD-WLEDs by reflecting the unconverted UV light back onto the package to excite the QDs further. Furthermore, the angular CCT uniformity of the QD-WLEDs also improved considerably because of the dependence of the DBR structure on the incident angle. The angular CCT deviation in the range of -70° to 70° decreased to 39 K and the CRI of the WLED is higher than 90. The high-CRI and uniform angular CCT QD-WLED containing the DBR demonstrates potential applicability as the lighting source of next-generation display devices and solid-state lighting.

Original language	English (US)
Article number	7046267
Pages (from-to)	23-29
Number of pages	7
Journal	IEEE Journal of Selected Topics in Quantum Electronics
Volume	21
Issue number	4
DOIs	https://doi.org/10.1109/JSTQE.2015.2404877
State	Published - Jul 1 2015

Keywords

GaN
light-emitting diodes (LEDs
quantum dots (QDs)

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics
Electrical and Electronic Engineering

Online availability

10.1109/JSTQE.2015.2404877

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Chen, K. J., Lin, C. C., Han, H. V., Lee, C. Y., Chien, S. H., Wang, K. Y., Chiu, S. H., Tu, Z. Y., Li, J. R., Chen, T. M., Li, X., Shih, M. H., & Kuo, H. C. (2015). Wide-range correlated color temperature light generation from resonant cavity hybrid quantum dot light-emitting diodes. IEEE Journal of Selected Topics in Quantum Electronics, 21(4), 23-29. [7046267]. https://doi.org/10.1109/JSTQE.2015.2404877

Chen, KJ, Lin, CC, Han, HV, Lee, CY, Chien, SH, Wang, KY, Chiu, SH, Tu, ZY, Li, JR, Chen, TM, Li, X, Shih, MH & Kuo, HC 2015, 'Wide-range correlated color temperature light generation from resonant cavity hybrid quantum dot light-emitting diodes', IEEE Journal of Selected Topics in Quantum Electronics, vol. 21, no. 4, 7046267, pp. 23-29. https://doi.org/10.1109/JSTQE.2015.2404877

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abstract = "This study presents extremely uniform colloidal quantum dot white light-emitting diodes (QD-WLEDs) that demonstrate a high color rendering index (CRI) and correlated color temperatures (CCTs) ranging from 2500 to 4500 K. Experimental results indicate that the structure of the distributed Bragg reflector (DBR) containing a stopband in the UV region enhances the intensity output of both monochromatic QD-LEDs and QD-WLEDs by reflecting the unconverted UV light back onto the package to excite the QDs further. Furthermore, the angular CCT uniformity of the QD-WLEDs also improved considerably because of the dependence of the DBR structure on the incident angle. The angular CCT deviation in the range of -70° to 70° decreased to 39 K and the CRI of the WLED is higher than 90. The high-CRI and uniform angular CCT QD-WLED containing the DBR demonstrates potential applicability as the lighting source of next-generation display devices and solid-state lighting.",

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AU - Chien, Shih Hsuan

AU - Wang, Kuan Yu

AU - Chiu, Sheng Huan

AU - Tu, Zong Yi

AU - Li, Jie Ru

AU - Chen, Teng Ming

AU - Li, Xiuling

AU - Shih, Min Hsiung

AU - Kuo, Hao Chung

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N2 - This study presents extremely uniform colloidal quantum dot white light-emitting diodes (QD-WLEDs) that demonstrate a high color rendering index (CRI) and correlated color temperatures (CCTs) ranging from 2500 to 4500 K. Experimental results indicate that the structure of the distributed Bragg reflector (DBR) containing a stopband in the UV region enhances the intensity output of both monochromatic QD-LEDs and QD-WLEDs by reflecting the unconverted UV light back onto the package to excite the QDs further. Furthermore, the angular CCT uniformity of the QD-WLEDs also improved considerably because of the dependence of the DBR structure on the incident angle. The angular CCT deviation in the range of -70° to 70° decreased to 39 K and the CRI of the WLED is higher than 90. The high-CRI and uniform angular CCT QD-WLED containing the DBR demonstrates potential applicability as the lighting source of next-generation display devices and solid-state lighting.

AB - This study presents extremely uniform colloidal quantum dot white light-emitting diodes (QD-WLEDs) that demonstrate a high color rendering index (CRI) and correlated color temperatures (CCTs) ranging from 2500 to 4500 K. Experimental results indicate that the structure of the distributed Bragg reflector (DBR) containing a stopband in the UV region enhances the intensity output of both monochromatic QD-LEDs and QD-WLEDs by reflecting the unconverted UV light back onto the package to excite the QDs further. Furthermore, the angular CCT uniformity of the QD-WLEDs also improved considerably because of the dependence of the DBR structure on the incident angle. The angular CCT deviation in the range of -70° to 70° decreased to 39 K and the CRI of the WLED is higher than 90. The high-CRI and uniform angular CCT QD-WLED containing the DBR demonstrates potential applicability as the lighting source of next-generation display devices and solid-state lighting.

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Wide-range correlated color temperature light generation from resonant cavity hybrid quantum dot light-emitting diodes

Abstract

Keywords

ASJC Scopus subject areas

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