SBIR Phase I: Ultra High Efficiency Top-emitting Quantum Dot light-emitting Display Incorporating Microlens Array

这个小型企业创新研究第一阶段项目旨在展示使用顶部发射结构和用于显示应用的微透镜阵列的超高效率量子点发光二极管(QD-LED)。将解决两个关键挑战。首先，在以往高效底发射QD-LED的基础上，探索一种新型的顶发射结构。顶部发射结构的使用消除了通过玻璃基板内的光导模式捕获的光，从而改善了光出耦合。在QD-LED的顶部将应用微透镜阵列，以进一步增强光提取。该项目将侧重于一些创新方法。微透镜阵列将使用一种新的邮票印刷方法来制造。小尺寸微透镜加上顶部发射结构，将使传统的外耦合微透镜引起的像素模糊效应最小化。其次，使用高折射率材料制作微透镜，使其与透明电极的折射率相匹配，从而提高光提取效率。该项目更广泛的影响/商业潜力在于实现QD-LED显示屏、固态照明和其他应用的商业化。与LCD或有机发光二极管(OLED)技术相比，QD-LED提供了本质上更高的颜色纯度，适合显示应用。然而，与LCD和OLED相比，当前的QD-LED解决方案存在效率较低的问题。S公司创新的纳米材料和器件架构使非常高效的底部发射QD-LED具有高的外部量子效率。此外，公司的多层结构？S量子点发光二极管是通过溶液工艺淀积的，这大大降低了成本。预计性能更好、价格更低的QD-LED将迅速在一个年出货量超过15亿台的600亿美元市场上获得相当大的市场份额。

This Small Business Innovation Research Phase I project seeks to demonstrate ultra high efficiency quantum dot light-emitting diodes (QD-LEDs) using a top-emitting structure and micro-lens array for display applications. Two key challenges will be addressed. First, a novel top-emitting structure will be explored based on the previous efficient bottom-emitting QD-LEDs. Use of top-emitting structure removes light trapped through the wave-guide mode within the glass substrate, which improves light out-coupling. A micro-lens array will be applied on top of the QD-LEDs to further enhance the light extraction. The project will focus on a number of innovative approaches. Micro-lens arrays will be fabricated using a novel stamp printing method. A small size micro-lens along with a top-emitting structure will minimize the pixel blurring effect induced by the conventional out-coupling micro-lens. Secondly, high refractive index material will be used to fabricate a micro-lens to match the refractive index of the transparent electrode, hence improving light extraction efficiency. The broader impact/commercial potential of this project lies is to enable the commercialization of QD-LED displays, solid-state lighting and other applications. QD-LEDs provide intrinsically higher color purity compared to LCD or organic light-emitting diode (OLED) technology and are suitable for display applications. However, current QD-LED solutions suffer from lower efficiency compared to LCD and OLED. The company?s innovative nanomaterials and device architecture has enabled very efficient bottom-emitting QD-LEDs with high external quantum efficiency. Additionally, the multi-layer structure in the company?s QD-LED are deposited through solution processing, which reduces the cost significantly. It is expected that a better performing and substantially less expensive QD-LED will quickly gain considerable market share in a $60B market that ships over 1.5B units a year.