Institute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou, 510640, P. R. China.
Adv Mater. 2014 Apr 23;26(16):2459-73. doi: 10.1002/adma.201304784. Epub 2014 Mar 14.
White polymer light-emitting devices (WPLEDs) have become a field of immense interest in both scientific and industrial communities. They have unique advantages such as low cost, light weight, ease of device fabrication, and large area manufacturing. Applications of WPLEDs for solid-state lighting are of special interest because about 20% of the generated electricity on the earth is consumed by lighting. To date, incandescent light bulbs (with a typical power efficiency of 12-17 lm W(-1) ) and fluorescent lamps (about 40-70 lm W(-1) ) are the most widely used lighting sources. However, incandescent light bulbs convert 90% of their consumed power into heat while fluorescent lamps contain a small but significant amount of toxic mercury in the tube, which complicates an environmentally friendly disposal. Remarkably, the device performances of WPLEDs have recently been demonstrated to be as efficient as those of fluorescent lamps. Here, we summarize the recent advances in WPLEDs with special attention paid to the design of novel luminescent dopants and device structures. Such advancements minimize the gap (for both efficiency and stability) from other lighting sources such as fluorescent lamps, light-emitting diodes based on inorganic semiconductors, and vacuum-deposited small-molecular devices, thus rendering WPLEDs equally competitive as these counterparts currently in use for illumination purposes.
白色聚合物发光器件（WPLEDs）在科学界和工业界都引起了极大的兴趣。它们具有独特的优势，如低成本、重量轻、易于器件制造和大面积制造。WPLED 用于固态照明的应用特别有趣，因为地球上大约 20%的发电量用于照明。迄今为止，白炽灯泡（典型功率效率为 12-17 lm W(-1)）和荧光灯（约 40-70 lm W(-1)）是最广泛使用的照明光源。然而，白炽灯泡将其消耗功率的 90%转化为热量，而荧光灯在灯管中含有少量但相当数量的有毒汞，这使得环保处理变得复杂。值得注意的是，WPLED 的器件性能最近已被证明与荧光灯一样高效。在这里，我们总结了 WPLED 的最新进展，特别关注新型发光掺杂剂和器件结构的设计。这些进展最大限度地缩小了与其他光源（如荧光灯、基于无机半导体的发光二极管和真空沉积小分子器件）的差距（无论是效率还是稳定性），从而使 WPLED 与目前用于照明目的的这些同类产品具有同等竞争力。
