Department of Chemistry, Seoul National University , Seoul 151-747, Korea.
Department of Chemistry, Texas A&M University , College Station, Texas 77843, United States.
Langmuir. 2017 Nov 14;33(45):13040-13050. doi: 10.1021/acs.langmuir.7b03335. Epub 2017 Oct 31.
Recently, quantum dots (QDs) have been successfully developed as efficient color converters for light-emitting diodes (LEDs) display due to excellent optical properties of QDs. Herein, we demonstrate a new approach to form metal oxide layers (or metal oxide coating) on the exterior surface of gradient alloy QDs (the most advanced chemical architecture QDs developed thus far wherein the lattice parameter from the core to shell is changing in a gradient fashion) in order to improve the photochemical stability and photoluminescence efficiency. The resulting CdO-treated QDs are incorporated into polymer matrix films to fabricate a backlight unit as a part of display panel wherein CdO-treated gradient alloy QDs are utilized as color converters upon the blue-LED excitation. The fabricated 9.7 in. iPad 2 tablet liquid crystal display panel exhibited an excellent uniformity in terms of CIE chromaticity, luminance, and bright variation and superb durability test results (maintenance of ca. 110% brightness compared to initial value even after 3 weeks of operation).
最近，量子点 (QDs) 因其出色的光学性能而成功地被开发为用于发光二极管 (LED) 显示器的高效色转换材料。在此，我们展示了一种新方法，即在梯度合金 QDs（迄今为止开发的最先进的化学结构 QD，其晶格参数从核到壳呈梯度变化）的外表面形成金属氧化物层（或金属氧化物涂层），以提高光电化学稳定性和光致发光效率。所得的 CdO 处理的 QDs 被掺入聚合物基质膜中以制造背光单元作为显示面板的一部分，其中在蓝 LED 激发下，CdO 处理的梯度合金 QDs 用作颜色转换器。所制造的 9.7 英寸 iPad 2 平板电脑液晶显示面板在 CIE 色度、亮度和亮度变化方面表现出出色的均匀性，并且具有出色的耐久性测试结果（与初始值相比，即使在运行 3 周后，亮度也保持约 110%）。
