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Full spectral optical modeling of quantum-dot-converted elements for light-emitting diodes considering reabsorption and reemission effect

机译：考虑重吸收和再次效应的发光二极管的量子点转换元件的全光谱光学建模

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摘要

Quantum dots (QDs) have attracted significant attention in light-emitting diode (LED) illumination and display applications, owing to their high quantum yield and unique spectral properties. However, an effective optical model of quantum-dot-converted elements (QDCEs) for (LEDs) that entirely considers the reabsorption and reemission effect is lacking. This suppresses the design of QDCE structures and further investigation of light-extraction/ conversion mechanisms in QDCEs. In this paper, we proposed a full spectral optical modeling method for QDCEs packaged in LEDs, entirely considering the reabsorption and reemission effect, and its results are compared with traditional models without reabsorption or reemission. The comparisons indicate that the QDCE absorption loss of QD emission light is a major factor decreasing the radiant efficacy of LEDs, which should be considered when designing QDCE structures. According to the measurements of fabricated LEDs, only calculation results that entirely consider reabsorption and reemission show good agreement with experimental radiant efficacy, spectra, and peak wavelength at the same down-conversion efficiency. Consequently, it is highly expected that QDCE will be modeled considering the reabsorption and reemission events. This study provides a simple and effective modeling method for QDCEs, which shows great potential for their structure designs and fundamental investigations.
机译：由于其高量子产量和独特的光谱性能，量子点（QDS）在发光二极管（LED）照明和显示应用中引起了显着的关注。然而，缺乏针对（LED）的量子点转换元件（QDCE）的有效光学模型，其完全考虑重吸收和再次效应。这抑制了QDCE结构的设计以及QDCE中的光提取/转换机制进一步研究。在本文中，我们提出了一种全谱光学建模方法，用于在LED中包装的QDCE，完全考虑重吸收和再次效果，其结果与传统模型进行比较，而无需重吸收或再次。比较表明QD发射光的QDCE吸收损失是降低LED辐射功效的主要因素，这在设计QDCE结构时应考虑。根据制造的LED的测量，仅计算结果完全考虑Reobleplate和Reemission，与实验辐射功效，光谱和峰值波长以相同的下转换效率展示良好的一致性。因此，预计QDCE将考虑重吸收和再次事件的建模。本研究为QDCE提供了一种简单有效的QDCE建模方法，这对其结构设计和基本调查表示巨大潜力。

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  • 来源
    《Nanotechnology》 |2018年第29期|共10页
  • 作者

    Li Jia-Sheng; Tang Yong; Li Zong-Tao; Cao Kai; Yan Cai-Man; Ding Xin-Rui;

  • 作者单位

    South China Univ Technol Engn Res Ctr Green Mfg Energy Saving &

    New Energy Guangzhou 510640 Guangdong Peoples R China;

    South China Univ Technol Engn Res Ctr Green Mfg Energy Saving &

    New Energy Guangzhou 510640 Guangdong Peoples R China;

    South China Univ Technol Engn Res Ctr Green Mfg Energy Saving &

    New Energy Guangzhou 510640 Guangdong Peoples R China;

    South China Univ Technol Engn Res Ctr Green Mfg Energy Saving &

    New Energy Guangzhou 510640 Guangdong Peoples R China;

    South China Univ Technol Engn Res Ctr Green Mfg Energy Saving &

    New Energy Guangzhou 510640 Guangdong Peoples R China;

    South China Univ Technol Engn Res Ctr Green Mfg Energy Saving &

    New Energy Guangzhou 510640 Guangdong Peoples R China;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 特种结构材料;
  • 关键词

    quantum dots; optical modeling; quantum-dot-converted elements; light-emitting diodes; reabsorption;

    机译：量子点;光学建模;量子点转换元件;发光二极管;重吸收;

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