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1.武汉大学 化学与分子科学学院, 湖北 武汉 430072
2.武汉光电国家研究中心, 湖北 武汉 430074
3.汕头大学 化学系和广东省有序结构材料的制备与应用重点实验室, 广东 汕头 515063
[ "高羽晗(1997-),女,重庆人,硕士,2022年于武汉大学获得硕士学位,主要从事有机光电材料和器件方面的 研究。Email:gaoyuhan@whu.edu.cn" ]
[ "谢国华(1982-),男,福建漳州人,博士,副研究员,博士生导师,2011年于吉林大学获得博士学位,主要从事有机光电材料和器件的交叉学科的研究。E-mail: guohua.xie@whu.edu.cn" ]
纸质出版日期:2023-02-05,
收稿日期:2022-09-05,
修回日期:2022-09-29,
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高羽晗,谢国华.级联敏化三元旋涂型磷光器件电致发光性能[J].发光学报,2023,44(02):219-226.
GAO Yuhan,XIE Guohua.Electroluminescent Performances of Solution-processed Phosphorescent Organic Light-emitting Diodes Based on Cascade Energy Transfer of Ternary Blends[J].Chinese Journal of Luminescence,2023,44(02):219-226.
高羽晗,谢国华.级联敏化三元旋涂型磷光器件电致发光性能[J].发光学报,2023,44(02):219-226. DOI: 10.37188/CJL.20220323.
GAO Yuhan,XIE Guohua.Electroluminescent Performances of Solution-processed Phosphorescent Organic Light-emitting Diodes Based on Cascade Energy Transfer of Ternary Blends[J].Chinese Journal of Luminescence,2023,44(02):219-226. DOI: 10.37188/CJL.20220323.
金属配合物磷光分子在高浓度下易产生发光猝灭,通常采用主客体两元掺杂结构来提高电致发光效率。热激活延迟荧光(TADF)材料通过三线态激子的反向系间窜越理论上可达到100%的内量子效率。为探究不同主体材料在三元敏化磷光体系中的作用,本文基于TADF聚合物作为敏化剂、黄橙光磷光配合物作为发光材料,分别研究了以传统荧光材料和蓝色TADF主体构建的三元敏化的旋涂型有机电致发光器件性能。研究表明,在客体浓度分别为1%、5%、50%时,基于TADF主体的器件电致发光性能均优于相同浓度下以传统荧光主体构建的器件性能。其中当磷光配合物PO‐01‐TB掺杂浓度为1%时,以天蓝光TADF材料为主体制备的器件最大外量子效率为12.2%,相较于以传统荧光为主体的器件外量子效率(10.7%)提高了14%。这源于本身具有双极传输特性的TADF主体通过反向系间窜越通道增强了对敏化剂和客体的级联能量传递作用,减少了三线态激子的浓度猝灭和湮灭过程,提高了大电流注入下的激子利用率。
Phosphorescent metal complexes tend to be quenched at high concentration. The host-guest strategy is usually employed to improve the electroluminescent efficiency. Due to the reverse intersystem crossing, thermally activated delayed fluorescence (TADF) materials could potentially achieve 100% internal quantum efficiency. To explore the influence of the host on the electroluminescence of the solution-processed organic light-emitting devices, the ternary-blend emitting layers were constructed with a TADF polymer as the sensitizer and a phosphorescent emitter which were hosted by a conventional fluorescent material and a TADF material, respectively. For the phosphorescent emitter with the concentration of 1%, 5% and 50%, the external quantum efficiencies of the devices based on the sky-blue TADF host were respectively higher than those of the devices based on the conventional fluorescent host. With 1 % phosphorescent emitter PO-01-TB doped in the ternary-blend emitting layer, the peak external quantum efficiency of the solution-processed device hosted by the TADF material DMAC-DPS was up to 12.2%, which was 14% higher than that of the device with the fluorescent host (10.7%). This is attributed to efficient cascade energy transfer in the presence of the TADF host with the bipolar property and reverse intersystem crossing, which alleviates the triplet annihilation and quenching effects under high driving current.
有机电致发光器件三元敏化热激活延迟荧光磷光能量传递
organic light-emitting diodeternary blendthermally activated delayed fluorescencephosphorescenceenergy transfer
XU S D, LIU T T, MU Y X, et al. An organic molecule with asymmetric structure exhibiting aggregation-induced emission, delayed fluorescence, and mechanoluminescence [J]. Angew. Chem. Int. Ed., 2015, 54(3): 874-878. doi: 10.1002/anie.201409767http://dx.doi.org/10.1002/anie.201409767
TAO Y, YUAN K, CHEN T, et al. Thermally activated delayed fluorescence materials towards the breakthrough of organoelectronics [J]. Adv. Mater., 2014, 26(47): 7931-7958. doi: 10.1002/adma.201402532http://dx.doi.org/10.1002/adma.201402532
PARKER C A, HATCHARD C G. Triplet-singlet emission in fluid solutions. Phosphorescence of eosin [J]. Trans. Faraday Soc., 1961, 57: 1894-1904. doi: 10.1039/tf9615701894http://dx.doi.org/10.1039/tf9615701894
ENDO A, SATO K, YOSHIMURA K, et al. Efficient up-conversion of triplet excitons into a singlet state and its application for organic light emitting diodes [J]. Appl. Phys. Lett., 2011, 98(8): 083302-1-3. doi: 10.1063/1.3558906http://dx.doi.org/10.1063/1.3558906
KONDAKOV D Y, PAWLIK T D, HATWAR T K, et al. Triplet annihilation exceeding spin statistical limit in highly efficient fluorescent organic light-emitting diodes [J]. J. Appl. Phys., 2009, 106(12): 124510-1-7. doi: 10.1063/1.3273407http://dx.doi.org/10.1063/1.3273407
唐歌, 刘士浩, 张乐天, 等. 单层热激活延迟荧光有机发光器件及其激子分布特性 [J]. 发光学报, 2022, 43(4): 576-582. doi: 10.37188/CJL.20220014http://dx.doi.org/10.37188/CJL.20220014
TANG G, LIU S H, ZHANG L T, et al. Single-layer thermally activated delayed fluorescent organic light-emitting devices and exciton distribution profiles [J]. Chin. J. Lumin., 2022, 43(4): 576-582. (in Chinese). doi: 10.37188/CJL.20220014http://dx.doi.org/10.37188/CJL.20220014
HIGGINBOTHAM H F, YI C L, MONKMAN A P, et al. Effects of ortho-phenyl substitution on the rISC rate of D‐A type TADF molecules [J]. J. Phys. Chem. C, 2018, 122(14): 7627-7634. doi: 10.1021/acs.jpcc.8b01579http://dx.doi.org/10.1021/acs.jpcc.8b01579
LIU Y C, WANG Y K, LI C S, et al. Efficient thermally activated delayed fluorescence conjugated polymeric emitters with tunable nature of excited states regulated via carbazole derivatives for solution-processed OLEDs [J]. Macromolecules, 2018, 51(12): 4615-4623. doi: 10.1021/acs.macromol.8b00565http://dx.doi.org/10.1021/acs.macromol.8b00565
ZHANG D D, SONG X Z, CAI M H, et al. Blocking energy-loss pathways for ideal fluorescent organic light-emitting diodes with thermally activated delayed fluorescent sensitizers [J]. Adv. Mater., 2018, 30(6): 1705250-1-10. doi: 10.1002/adma.201705250http://dx.doi.org/10.1002/adma.201705250
HUANG T Y, JIANG W, DUAN L. Recent progress in solution processable TADF materials for organic light-emitting diodes [J]. J. Mater. Chem. C, 2018, 6(21): 5577-5596. doi: 10.1039/c8tc01139ghttp://dx.doi.org/10.1039/c8tc01139g
WANG S P, ZHANG Y W, CHEN W P, et al. Achieving high power efficiency and low roll-off OLEDs based on energy transfer from thermally activated delayed excitons to fluorescent dopants [J]. Chem. Commun. (Camb.), 2015, 51(60): 11972-11975. doi: 10.1039/c5cc04469chttp://dx.doi.org/10.1039/c5cc04469c
CHEN J X, WANG K, ZHENG C J, et al. Red organic light-emitting diode with external quantum efficiency beyond 20% based on a novel thermally activated delayed fluorescence emitter [J]. Adv. Sci. (Weinh.), 2018, 5(9): 1800436-1-7. doi: 10.1002/advs.201800436http://dx.doi.org/10.1002/advs.201800436
刘婷婷, 李淑红, 王文军, 等. 基于器件结构提高TADF-OLED器件的发光性能 [J]. 发光学报, 2020, 41(1): 77-85. doi: 10.3788/fgxb20204101.0077http://dx.doi.org/10.3788/fgxb20204101.0077
LIU T T, LI S H, WANG W J, et al. Enhanced luminescent properties of TADF-OLEDs based on device structures [J]. Chin. J. Lumin., 2020, 41(1): 77-85. (in Chinese). doi: 10.3788/fgxb20204101.0077http://dx.doi.org/10.3788/fgxb20204101.0077
CAI M H, ZHANG D D, DUAN L. High performance thermally activated delayed fluorescence sensitized organic light-emitting diodes [J]. Chem. Rec., 2019, 19(8): 1611-1623. doi: 10.1002/tcr.201800148http://dx.doi.org/10.1002/tcr.201800148
XIE G H, DING L M. Triplet manipulation for strong luminescence [J]. Sci. Bull., 2020, 65(21): 1780-1782. doi: 10.1016/j.scib.2020.07.004http://dx.doi.org/10.1016/j.scib.2020.07.004
SONG X Z, ZHANG D D, LU Y, et al. Understanding and manipulating the interplay of wide-energy-gap host and TADF sensitizer in high-performance fluorescence OLEDs [J]. Adv. Mater., 2019, 31(35): 1901923-1-9. doi: 10.1002/adma.201901923http://dx.doi.org/10.1002/adma.201901923
凌乾坤, 董必正, 陈志宽, 等. 用于高效红色磷光有机发光二极管的双极性芴基咔唑基主体材料 [J]. 发光学报, 2022, 43(3): 359-370. doi: 10.37188/cjl.20210397http://dx.doi.org/10.37188/cjl.20210397
LING Q K, DONG B Z, CHEN Z K, et al. Bipolar fluorenylcarbazole-based host materials for efficient red phosphorescent organic light-emitting diodes [J]. Chin. J. Lumin., 2022, 43(3): 359-370. (in English). doi: 10.37188/cjl.20210397http://dx.doi.org/10.37188/cjl.20210397
XIAO L X, CHEN Z J, QU B, et al. Recent progresses on materials for electrophosphorescent organic light-emitting devices [J]. Adv. Mater., 2011, 23(8): 926-952. doi: 10.1002/adma.201003128http://dx.doi.org/10.1002/adma.201003128
MURAWSKI C, LEO K, GATHER M C. Efficiency roll-off in organic light-emitting diodes [J]. Adv. Mater., 2013, 25(47): 6801-6827. doi: 10.1002/adma.201301603http://dx.doi.org/10.1002/adma.201301603
ZHANG D D, DUAN L, LI Y L, et al. Towards high efficiency and low roll-off orange electrophosphorescent devices by fine tuning singlet and triplet energies of bipolar hosts based on indolocarbazole/1, 3, 5-triazine hybrids [J]. Adv. Funct. Mater., 2014, 24(23): 3551-3561. doi: 10.1002/adfm.201303926http://dx.doi.org/10.1002/adfm.201303926
LEE T W, CHUNG Y, KWON O, et al. Self-organized gradient hole injection to improve the performance of polymer electroluminescent devices [J]. Adv. Funct. Mater., 2007, 17(3): 390-396. doi: 10.1002/adfm.200600278http://dx.doi.org/10.1002/adfm.200600278
YANG Y K, WANG S M, ZHU Y H, et al. Thermally activated delayed fluorescence conjugated polymers with backbone-donor/pendant-acceptor architecture for nondoped OLEDs with high external quantum efficiency and low roll-off [J]. Adv. Funct. Mater., 2018, 28(10): 1706916-1-6. doi: 10.1002/adfm.201706916http://dx.doi.org/10.1002/adfm.201706916
王哲, 武瑞霞, 冯洋, 等. 基于混合主体结构的溶液法制备的高效蓝色磷光OLED [J]. 发光学报, 2022, 43(5): 763-772. doi: 10.37188/CJL.20220049http://dx.doi.org/10.37188/CJL.20220049
WANG Z, WU R X, FENG Y, et al. High-efficiency blue phosphorescent OLEDs based on mixed-host structure by solution-processed method [J]. Chin. J. Lumin., 2022, 43(5): 763-772. (in Chinese). doi: 10.37188/CJL.20220049http://dx.doi.org/10.37188/CJL.20220049
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