Water-Soluble Quantum Dots for Inkjet Printing Color Conversion Films with Simultaneous High Efficiency and Stability,ACS Applied Materials & Interfaces

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Water-Soluble Quantum Dots for Inkjet Printing Color Conversion Films with Simultaneous High Efficiency and Stability
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2024-01-16 , DOI: 10.1021/acsami.3c13244
Le Wang ₁ , Shuchen Shi ₂ , Lu Yin ₁ , Yue Zhai ₁ , Tongtong Xuan _{2,

3} , Bo Liu ₄ , Rong-Jun Xie _{2,

3,

5}

Affiliation

Water-soluble quantum dots (QDs) are necessary to prepare patterned pixels or films for high-resolution displays with less environmental burden but are very limited by the trade-off between photoluminescence and stability of QDs. In this work, we proposed synthesizing water-soluble QDs with simultaneous excellent luminescence properties and high stability by coating the amphiphilic poly(maleic anhydride-alt-1-octadecene)-ethanol amine (PMAO-EA) polymer on the surface of silane-treated QDs. These coated QDs show a photoluminescence quantum yield (PLQY) as high as 94%, and they have good photoluminescence stability against light irradiation and thermal attacks, owing to the suppression of the nonradiative recombination by the polymer layer and the isolation of oxygen and water by the silica layer. The water-soluble QDs, mixed with ethylene glycol, enable inkjet printing of QD color conversion films (QD-CCFs) with an average diameter of 68 μm for each pixel and a high PLQY of 91%. The QD-CCFs are demonstrated to fabricate red-emitting mini-LEDs by combining with blue mini-LED chips, which have an external quantum efficiency as high as 25.86% and a luminance of 2.44 × 10⁷ cd/m². We believe that the proposed strategy is applicable to other water-soluble QDs and paves an avenue for inkjet printing environmentally friendly QD-CCFs for mini/micro-LED displays.

中文翻译：

用于喷墨打印彩色转换薄膜的水溶性量子点同时具有高效率和稳定性

水溶性量子点（QD）是制备用于高分辨率显示器的图案化像素或薄膜所必需的，且环境负担较小，但由于量子点的光致发光和稳定性之间的权衡而受到很大限制。在这项工作中，我们提出通过在硅烷处理的表面涂覆两亲性聚（马来酸酐-alt -1-十八碳烯）-乙醇胺（PMAO-EA）聚合物来合成同时具有优异发光性能和高稳定性的水溶性量子点。 QD。这些涂层量子点的光致发光量子产率（PLQY）高达94%，并且由于聚合物层抑制非辐射复合以及氧和水的隔离，它们对光照射和热攻击具有良好的光致发光稳定性。二氧化硅层。水溶性量子点与乙二醇混合，可喷墨打印量子点颜色转换薄膜（QD-CCF），每个像素的平均直径为 68 μm，PLQY 高达 91%。 QD-CCFs被证明可以与蓝色mini-LED芯片结合制造红光mini-LED，其外量子效率高达25.86%，亮度为2.44 × 10 ⁷ cd/m ² 。我们相信，所提出的策略适用于其他水溶性量子点，并为用于微型/微型 LED 显示器的喷墨印刷环保 QD-CCF 铺平了道路。

更新日期：2024-01-16

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