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P‐9.1: QD based color converter with DBR Structure and its application on Micro‐LED
Author(s) -
Weng Yalian,
Yan Qun,
Guo Tailiang,
Zhou Xiongtu
Publication year - 2019
Publication title -
sid symposium digest of technical papers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.351
H-Index - 44
eISSN - 2168-0159
pISSN - 0097-966X
DOI - 10.1002/sdtp.13670
Subject(s) - light emitting diode , materials science , optoelectronics , atomic layer deposition , quantum dot , transmittance , diode , layer (electronics) , nanotechnology
An enhancement of light extraction efficiency of quantum dots (QD) in light‐emitting diodes (LEDs) with Bi‐functional TiO 2 /Al 2 O 3 distributed Bragg reflector (DBR) nanolaminate structure grown by atomic layer deposition (ALD) has been demonstrated. The DBRs were simulated and optimized with TFCalc, and they exhibited excellent and tunable optical properties, as well as reliable moisture barrier performance. These DBRs were integrated in the QD‐LED, enabling an obvious increase in red emission and a strong decrease in blue light transmittance, which can achieve color conversion greatly. Furthermore, these DBRs can prolong the lifetime of QDs evidently by isolating the QDs from the moisture vapor. These results highlight the potential application of DBRs in the QLEDs and QD‐LEDs.