High Efficiency Quantum Dot And Organic Leds With A Back-Cavity And A High Index Substrate

Keywords

light emitting diode; quantum dot display; thin film device

Abstract

We report a back-cavity design to enhance the optical efficiency of a quantum dot light-emitting diode (QLED) or an organic light-emitting diode (OLED) for display and lighting applications. Our simulation results show that the back-cavity design exhibits two major advantages: (1) the transparent electrode helps to increase the transmittance of backward light despite using a semi-transparent metal electrode, and (2) the thickness of the low index optical buffer layer can be optimized to modify the proportion of each optical channel. The proposed back-cavity also helps to lower the refractive index of the high-index substrate from ∼2.0 to ∼1.8 for achieving high optical efficiency. Finally, the introduced back-cavity does not degrade the color performance of the QLED/OLED.

Publication Date

3-10-2016

Publication Title

Journal of Physics D: Applied Physics

Volume

49

Issue

14

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1088/0022-3727/49/14/145103

Socpus ID

84962299147 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/84962299147

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