Excimer-emitting single molecules with stacked π-conjugated groups covalently linked at the 1,8-positions of naphthalene for highly efficient blue and green OLEDs
摘要:
两种高效蓝光化合物,1,8-双(4-(N-咔唑基)苯基)萘(BCzPN)和1,8-双(4-(10-苯基蒽-9-基)-苯基)萘(BPAPN),是设计和合成的,其中两个苯基咔唑或二苯基蒽单元通过键合到萘环的1-和8-位而紧密堆叠,从而在溶液或薄膜中产生强烈的分子内准分子发射。通过利用 BPAPN 作为发射极,在 100 cd m-2 时可实现 6 cd A-1 的高效率和 5.8% 的外量子效率 (EQE),在 1000 cd m-2 时可实现 8 cd A-1 和 5.8% EQE 的高效率图2是在非掺杂蓝色器件中实现的。通过使用 BCzPN 或 BPAPN 作为主体,基于 DPAVBi 掺杂的 BCzPN 蓝色器件在 100 cd m-2 下具有 15 cd A-1 和 6.5% EQE 的高效率,在 100 cd m-2 下具有 12 cd A-1 和 5.5% EQE 的高效率在 1000 cd m-1 时,基于 C545T 掺杂的 BPAPN 的绿色器件在 100 cd m-2 时具有 23 cd A-1 和 6.7% EQE 的高效率,在 100 cd m-2 时具有 22 cd A-1 和 6.7% EQE 的高效率分别为 1000 cd m±2。
Evolution from Tunneling to Hopping Mediated Triplet Energy Transfer from Quantum Dots to Molecules
作者:Zhiyuan Huang、Zihao Xu、Tingting Huang、Victor Gray、Kasper Moth-Poulsen、Tianquan Lian、Ming Lee Tang
DOI:10.1021/jacs.0c07727
日期:2020.10.14
the traditional 1 nm Dexter distance. Transient absorption spectroscopy is used to confirm triplet energy transfer from CdSe to transmitter, and the formation of a bridge tripletstate as an intermediate for the hopping mechanism. This first observation of the tunneling-to-hopping transition for long range triplet energy transfer between nanocrystal light absorbers and molecular acceptors suggests that
Novel fluorescent blue-emitting materials based on anthracene-fluorene hybrids with triphenylsilane group for organic light-emitting diodes
作者:Ji Young Song、Soo Na Park、Seok Jae Lee、Young Kwan Kim、Seung Soo Yoon
DOI:10.1016/j.dyepig.2014.11.003
日期:2015.3
electroluminescence properties of new blue-emitting materials based on anthracene-fluorene derivatives with triphenylsilane groups for organic light-emitting diodes. To study the electroluminescence properties, OLEDs were fabricated in the following sequence: ITO/4,4-Bis(N-(1-naphthyl)-N-phenylamino)biphenyl (50 nm)/newly designed blue materials (30 nm)/4,4-bis(N-(1-naphthyl)-N-phenylamino)biphenyl
本文报道了基于具有三苯基硅烷基团的蒽-芴衍生物的新型蓝色发光材料的合成和电致发光特性,用于有机发光二极管。为了研究电致发光性能,按以下顺序制造OLED:ITO / 4,4-双(N-(1-萘基)-N-苯基氨基)联苯(50 nm)/新设计的蓝色材料(30 nm)/ 4 ,4-双(N-(1-萘基)-N-苯氨基)联苯(30nm)/ 8-羟基喹啉基锂-锂(2nm)/ Al(100nm)。所有器件均显示蓝色电致发光。特别是使用10-(9,9-二甲基-2-(三苯基甲硅烷基)-9 H-作为发光材料的芴-7-基)-9-(4-(三苯基甲硅烷基)苯基)蒽显示出最深的蓝色发光,其CIE坐标为(x = 0.15,y = 0.09)。同样,使用(9,9-二甲基-2-(10-(10-(10-苯基蒽蒽-9-基)蒽蒽-9-基)-9 H-芴-7-基)三苯基硅烷的装置显示出高发光,功率和量子在20 mA / cm 2下的效率分别为2