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Nanodot-Enhanced High-Efficiency Pure-White Organic Light-Emitting Diodes with Mixed-Host Structures

机译:具有混合主体结构的纳米点增强型高效纯白色有机发光二极管

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A relatively high-efficiency, fluorescent pure-white organic light-emitting diode was fabricated using a polysilicic acid (PSA) nanodot-embedded polymeric hole-transporting layer (HTL). The diode employed a mixed host in the single emissive layer, which comprised 0.5 wt % yellow 5,6,11,12-tetra-phenylnaphthacene doped in the mixed host of 50 % 2-(N,N-diphenyl-amino)-6-[4-(N,N-diphenylamino)styryl]naphthalene and 50% N,N'-bis-(l-naphthyl)-N,N'-diphenyl-1,10-biphenyl-4-4'-diamine. By incorporating 7 wt % 3 nm PSA nanodot into the HTL of poly(3,4-ethylene-dioxythiophene)-poly-(styrenesulfonate), the efficiency at 100 cd m~(-2) was increased from 13.5 lm W~(-1) (14.7 cd A~(-1); EQE: 7.2 %) to 17.1 lm W~(-1) (17.6 cd A~(-1); EQE: 8.3 %). The marked efficiency improvement may be attributed to the introduction of the PSA nanodot, leading to a better carrier-injection-balance.
机译:使用聚硅酸(PSA)纳米点嵌入的聚合物空穴传输层(HTL)制备了效率较高的荧光纯白色有机发光二极管。该二极管在单个发射层中采用了混合主体,该混合主体包含0.5 wt%的黄色5,6,11,12-四苯基萘并苯掺杂在混合主体中的50%2-(N,N-二苯基-氨基)-6 -[4-(N,N-二苯基氨基)苯乙烯基]萘和50%N,N′-双-(1-萘基)-N,N′-二苯基-1,10-联苯-4-4′-二胺。通过将7 wt%的3 nm PSA纳米点掺入聚(3,4-乙烯-二氧噻吩)-聚-(苯乙烯磺酸盐)的HTL中,100 cd m〜(-2)时的效率从13.5 lm W〜(- 1)(14.7 cd A〜(-1); EQE:8.3%)(14.7 cd A〜(-1); EQE:7.2%)至17.1 lm W〜(-1)(17.6 cd A〜(-1); EQE:8.3%)。效率的显着提高可能归因于PSA纳米点的引入,从而导致了更好的载流子注入平衡。

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