基于半导体纳米材料的偏振光发射:从材料到发光二极管  

Semiconductor nanomaterial-based polarized light emission:From materials to light emitting diodes

作　　者：吴金磊 方国强 张永亮 Nandita Biswas 季亚楠 徐文 董斌 刘宁 Jinlei Wu;Guoqiang Fang;Yongliang Zhang;Nandita Biswas;Yanan Ji;Wen Xu;Bin Dong;Ning Liu(Department of Physics and Bernal Institute,University of Limerick,Limerick,Ireland;Key Laboratory of New Energy and Rare Earth Resource Utilization of State Ethnic Affairs Commission,Key Laboratory of Photosensitive Materials and Devices of Liaoning Province,School of Physics and Materials Engineering,Dalian Minzu University,Dalian 116600,China)

机构地区：[1]Department of Physics and Bernal Institute,University of Limerick,Limerick,Ireland [2]Key Laboratory of New Energy and Rare Earth Resource Utilization of State Ethnic Affairs Commission,Key Laboratory of Photosensitive Materials and Devices of Liaoning Province,School of Physics and Materials Engineering,Dalian Minzu University,Dalian 116600,China

出　　处：《Science China Materials》2023年第4期1257-1282,共26页中国科学（材料科学（英文版）

基　　金：supported by the European Union’s Horizon 2020 Research and Innovation Programme under the Marie Sklodowska-Curie grant agreement(801165),with co-funding through Science Foundation Ireland,Career Development Award(17/CDA/4733);supported by the National Natural Science Foundation of China(12204088,11974069 and U21A2074);Liaoning Revitalization Talents Program(XLYC1902113);the Science and Technology Project of Liaoning Province(2020JH2/10100012)。

摘　　要：由于偏光片、彩色滤光片和液晶层等结构的损耗,基于背光源技术的液晶显示器的整体效率不足5%.自发射发光二极管(LED)不但具有巨大的市场潜力,而且能够满足未来显示的需求,迎来了巨大的发展机遇.更重要的是,由于避免了偏光片造成的光损失,偏振LED可以提高背景光利用效率.因此,亟需寻找有效的方法组装高质量的各向异性纳米材料薄膜,从而制备出具有高偏振度和高外量子效率的偏振LED.本文介绍了一些半导体纳米材料的光电特性及其在偏振LED中的潜在应用.综述了在偏振光发射领域从材料到薄膜,再到LED的研究进展;总结和比较了构建偏振光发射薄膜和LED的不同组装策略;最后,讨论了当前面临的挑战,并对偏振LED的潜在商业应用价值进行了展望.我们希望这篇综述能够对偏振LED当前研究进展进行有价值的总结,并对其未来发展激发一些新的、切实可行的想法.The overall optical efficiency of backlight-based liquid crystal displays(LCDs)is less than 5%due to the loss of backlight source by polarizers,color filter,liquid crystal layer and so on.Self-emissive light emitting diodes(LEDs)have been undergoing huge development due to their substantial market potentials to meet the demand of future display.More importantly,the polarized LEDs could enhance the energy utilization efficiency by avoiding light loss caused by polarizers.Therefore,it is desirable to look for effective methods to assemble high-quality anisotropic nanomaterial films so as to fabricate polarized LEDs with high degree of polarization and external quantum efficiency.Here,the photoelectrical properties of some semiconductor nanomaterials and their potential applications for polarized LEDs are introduced.The research progress in the field of polarized light emission from materials to films and then to LEDs is reviewed.Mechanisms of polarized emission,and different assembly strategies for polarized light emitting films and LEDs are also summarized and compared.Finally,several current challenges are discussed,and perspectives on future potential commercial application of polarized LEDs are offered.We hope this review will provide a valuable summary on current status and stimulate some new insightful ideas for future development of polarized LEDs.

关 键 词：偏振光 半导体纳米材料 偏振度 背景光 液晶显示器 偏光片 彩色滤光片 外量子效率 

分 类 号：TN312.8[电子电信—物理电子学] TB383.1[一般工业技术—材料科学与工程]