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Efficient and chromaticity stable green and white organic light-emitting devices with organic–inorganic hybrid materials

机译:高效和色度稳定的绿色和白色有机发光器件,具有有机无机混合材料

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Efficient inverted bottom emissive organic light emitting diodes (IBOLEDs) with tin dioxide and/or Cd-doped SnO _(2) nanoparticles as an electron injection layer at the indium tin oxide cathode:electron transport layer interface have been fabricated. The SnO _(2) NPs promote electron injection efficiently because their conduction band (?3.6 eV) lies between the work function ( W _(f) ) of ITO (4.8 eV) and the LUMO of the electron-transporting molecule (?3.32 eV), leading to enhanced efficiency at low voltage. The 2.0% SnO _(2) NPs (25 nm) with Ir(ddsi) _(2) (acac) emissive material (SnO _(2) NPs/ITO) have an enhanced current efficiency ( η _(c) , cd A ~(?1) ) of 52.3/24.3, power efficiency ( η _(p) , lm W ~(?1) ) of 10.9/3.4, external quantum efficiency ( η _(ex) , %) of 16.4/7.5 and luminance ( L , cd m ~(?2) ) of 28?182/1982. A device with a 2.0% Cd-doped SnO _(2) layer shows higher η _(c) (60.6 cd A ~(?1) ), η _(p) (15.4 lm W ~(?1) ), η _(ex) (18.3%) and L (26?858 cd m ~(?2) ) than SnO _(2) devices or control devices. White light emission was harvested from a mixture of Cd–SnO _(2) NPs and homoleptic blue phosphor Ir(tsi) _(3) ; the combination of blue emission ( λ _(EL) = 428 nm) from Ir(tsi) _(3) and defect emission from Cd–SnO _(2) NPs ( λ _(EL) = 568 nm) gives an intense white light with CIE of (0.31, 0.30) and CCT of 6961 K. The white light emission [CIE of (0.34, 0.35) and CCT of 5188 K] from colloid hybrid electrolyte BMIMBF _(4) –SnO _(2) is also discussed.
机译:用锡氧化铟锡阴极的电子注入层和/或CD掺杂的SnO _(2)纳米粒子的高效倒置底部发光有机发光二极管(Iboleds)作为电子注入层:已经制造了电子传输层界面。 SNO _(2)NPS促进电子注入,因为它们的导电带(α3.6eV)位于ITO(4.8eV)的工作功能(W _(F))和电子传输分子的叶片之间(3.32 EV),导致在低电压下提高效率。具有IR(DDSI)_(2)(ACAC)发光材料(SNO _(2)NPS / ITO)的2.0%SNO _(2)NPS(25nm)具有增强的电流效率(η_(c),CD 52.3 / 24.3,功率效率(η_(p),lm w〜(α1))为10.9 / 3.4,外部量子效率(η_(ex),%)为16.4 / 7.5和亮度(L,Cd m〜(?2))为28?182/1982。具有2.0%CD掺杂的SnO _(2)层的装置显示出较高的η_(c)(60.6cd a〜(Δ1)),η_(p)(15.4 lm w〜(Δ1)),η _(ex)(18.3%)和l(26?858cd m〜(Δ2))而不是SnO _(2)器件或控制设备。从CD-SNO _(2)NPS和均蛋蓝磷酸二(TSI)_(3)的混合物中收获白光发射;来自IR(TSI)_(3)的蓝色发射(λ_(λ= 428nm)的组合和来自CD-SnO _(2)NPS(λ_(eL)= 568nm)的缺陷发射给出了强烈的白色CIE的光(0.31,0.30)和6961 K的CCT。来自胶体杂交电解质BMIMBF _(4)-SNO_(2)的白色光发射[CIE(0.34,0.35)和5188 k]的CCT,也是讨论。

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