QLEDs for displays and solid-state lighting
QLEDs for displays and solid-state lighting
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DOI：
10.1557/mrs.2013.181
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发表时间：
2013-09-01
期刊：
影响因子：
5
通讯作者：
Bulovic, Vladimir
中科院分区：
文献类型：
--
作者：
Supran, Geoffrey J.;Shirasaki, Yasuhiro;Bulovic, Vladimir
用于发光应用的胶体量子点（QDs）的主流商业化已经开始：发射量子点增强颜色的索尼电视现在正在销售。可溶液处理半导体量子点的明亮和独特的尺寸可调颜色突出了电致发光量子点发光器件（qled）在节能，高颜色质量的薄膜显示和固态照明应用中的潜力。事实上，今年的报告显示，创纪录效率的电驱动QLED可以与最高效的分子有机led相媲美，再加上全彩QLED显示屏的出现，预示着QD技术将超越现有的光激发QD增强产品。在这篇文章中，我们讨论了在led中使用量子点作为发光团的主要优势，并概述了四种类型的量子led在19年的发展历程，它们的效率从不到0.01%提高到18%。在强调最新进展的情况下，我们确定了qled商业化面临的关键科学和技术挑战。基于已发表的小规模合成程序的定量分析，使我们能够估计大量生产发光应用中典型量子点的材料成本，并评估其商业可行性。
The mainstream commercialization of colloidal quantum dots (QDs) for light-emitting applications has begun: Sony televisions emitting QD-enhanced colors are now on sale. The bright and uniquely size-tunable colors of solution-processable semiconducting QDs highlight the potential of electroluminescent QD light-emitting devices (QLEDs) for use in energy-efficient, high-color-quality thin-film display and solid-state lighting applications. Indeed, this year's report of record-efficiency electrically driven QLEDs rivaling the most efficient molecular organic LEDs, together with the emergence of full-color QLED displays, foreshadow QD technologies that will transcend the optically excited QD-enhanced products already available. In this article, we discuss the key advantages of using QDs as luminophores in LEDs and outline the 19-year evolution of four types of QLEDs that have seen efficiencies rise from less than 0.01% to 18%. With an emphasis on the latest advances, we identify the key scientific and technological challenges facing the commercialization of QLEDs. A quantitative analysis, based on published small-scale synthetic procedures, allows us to estimate the material costs of QDs typical in light-emitting applications when produced in large quantities and to assess their commercial viability.