High-performance quantum dot light-emitting diodes using chip-scale package structures with high reliability and wide color gamut for backlight displays.

High-performance quantum dot light-emitting diodes using chip-scale package structures with high reliability and wide color gamut for backlight displays.
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DOI:
10.1039/c8ra07928e
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发表时间:
2018-10-22
期刊:
影响因子:
3.9
通讯作者:
Lee, Yu-Chun
Lee, Yu-Chun
中科院分区:
化学3区
文献类型:
--
作者:
Lai, Chun-Feng;Tien, Yu-Chien;Tong, Hung-Chun;Zhong, Chang-Zhi;Lee, Yu-Chun

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High reliability and wide color gamut light-emitting diodes (LEDs) that use composite quantum dot films (CQDFs) protected by chip-scale package (CSP) structures are presented. CQDFs containing CdZnSeS/ZnS core–shell QDs and the K2SiF6:Mn4+ phosphors were mixed with silicone gel and used as color converters in the CSP QD-LEDs. The CSP QD-LEDs, used for backlight displays, transmitted through a color filter and exhibited ITU-R Recommendation BT.2020 of approximately 86% (a National Television System Committee value of 115%). Furthermore, we performed a long-term reliability analysis test on the CSP QD-LEDs for 2352 h to verify whether the optical performance of CSP QD-LEDs does not significantly degrade relative to that of a conventional plastic leaded chip carrier QD-LEDs. We implemented a highly reliable package technology that can protect the QDs, solve the moisture/oxygen problems in defective QD-LEDs, and produce a backlight source for display with a wide color gamut. In this study, for the first time, we propose CSP QD-LEDs with excellent stability, high color uniformity, and wide color gamut for backlight displays.
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