Enhancing the fluorescence intensity of colloidal quantum dots (QDs) in case of color‐conversion type QD light‐emitting devices (LEDs) is very significant due to the large loss of QDs and their quantum yields during fabrication processes, such as patterning and spin‐coating, and can therefore improve cost‐effectiveness. Understanding the enhancement process is crucial for the design of metallic nanostructure substrates for enhancing the fluorescence of colloidal QDs. In this work, improved color conversion of colloidal green and red QDs coupled with aluminum (Al) and silver (Ag) nanodisk (ND) arrays designed by in‐depth systematic finite‐difference time domain simulations of excitation, spontaneous emission, and quantum efficiency enhancement is reported. Calculated results of the overall photoluminescence enhancement factor in the substrate of 500 × 500 µm² size are 2.37‐fold and 2.82‐fold for Al ND‐green QD and Ag ND‐red QD structures, respectively. Experimental results are in good agreement, showing 2.26‐fold and 2.66‐fold enhancements for Al ND and Ag ND structures. Possible uses of plasmonics in cases such as white LED and total color conversion for possible display applications are discussed. The theoretical treatments and experiments shown in this work are a proof of principle for future studies of plasmonic enhancement of various light‐emitting materials.

中文翻译：

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等离子体增强胶体量子点对变色发光器件的效果如何？

在颜色转换型QD发光器件（LED）的情况下，提高胶体量子点（QD）的荧光强度非常重要，这是因为QD的大量损失及其在制造过程中（例如构图和自旋）的量子产率。涂层，因此可以提高成本效益。了解增强过程对于设计用于增强胶体QD荧光的金属纳米结构基板至关重要。在这项工作中，胶体绿色和红色量子点与铝（Al）和银（Ag）纳米盘（ND）阵列相结合，通过对激发，自发发射和量子效率进行深入的系统有限差分时域仿真来设计，从而改善了颜色转换报告增强。Al ND绿色QD和Ag ND红色QD结构的^2个尺寸分别为2.37倍和2.82倍。实验结果吻合良好，表明Al ND和Ag ND结构提高了2.26倍和2.66倍。讨论了等离子在诸如白光LED和可能的显示应用中进行总颜色转换的情况下的可能用途。这项工作中显示的理论处理和实验是将来对各种发光材料进行等离子体增强的研究的原理证明。