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

这个小企业创新研究第一阶段项目旨在展示超高效率的量子点发光二极管（qd - led），使用顶部发射结构和微透镜阵列用于显示应用。两个关键挑战将得到解决。首先，我们将在先前高效底发射量子二极管的基础上，探索一种新的顶发射结构。顶部发射结构的使用消除了通过玻璃基板内波导模式捕获的光，从而改善了光的外耦合。微透镜阵列将应用于量子二极管的顶部，以进一步提高光提取。该项目将侧重于若干创新方法。微透镜阵列将采用一种新颖的邮票印刷方法制造。小尺寸微透镜加上顶发射结构可以最大限度地减少传统外耦合微透镜引起的像素模糊效应。其次，利用高折射率材料制作与透明电极折射率相匹配的微透镜，提高光提取效率。该项目的更广泛的影响/商业潜力在于使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本质上提供更高的色彩纯度，适合显示应用。然而，与LCD和OLED相比，目前的QD-LED解决方案的效率较低。公司吗?其创新的纳米材料和器件架构使具有高外量子效率的高效底发射qd - led成为可能。另外，公司的多层结构？QD-LED通过溶液处理沉积，大大降低了成本。预计性能更好、价格更低的QD-LED将迅速在每年出货量超过15亿的600亿美元市场中获得可观的市场份额。

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.