High Efficiency Tandem Organic Light Emitting Diode Using an Organic Heterojunction as the Charge Generation Layer: An Investigation into the Charge Generation Model and Device Performance

High Efficiency Tandem Organic Light Emitting Diode Using an Organic Heterojunction as the Charge Generation Layer: An Investigation into the Charge Generation Model and Device Performance
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使用有机异质结作为电荷生成层的高效串联有机发光二极管:电荷生成模型和器件性能的研究

DOI:
10.1021/acsphotonics.5b00010
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发表时间:
2015-01
期刊:
影响因子:
7
通讯作者:
Ma Dongge
Ma Dongge
中科院分区:
物理与天体物理1区
文献类型:
--
作者:
Sun Hengda;Guo Qingxun;Yang Dezhi;Chen Yonghua;Chen Jiangshan;Ma Dongge

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有机异质结(ohj)是构建高效串联有机发光二极管(oled)中常用的电荷产生层(cgl)。然而,电荷的产生机制仍不清楚。本文研究了由1,4,5,8,9,12-六氮杂三苯基-己二腈(HAT-CN)/ 4,4 ',4″-三(n -3-甲基苯基- n -苯胺)三苯胺(m-MTDATA)组成的典型OHJ CGL的工作原理。通过温度相关的J-V特性和模型拟合,我们发现OHJ中的电荷产生过程是由电子隧穿引起的。此外,我们仅使用市售的有机半导体材料制造了超高效率的绿色串联OLED。最大功率效率达到120 lm/W,但在1000 cd/m2时仍保持在110.3 lm/W,与相应的单单元器件相比,功率效率大大提高。最大电流效率和外量子效率可高达a…
Organic heterojunctions (OHJs) are frequently used as charge generation layers (CGLs) in the construction of high efficiency tandem organic light emitting diodes (OLEDs). However, the charge generation mechanism still remains unclear. In this article, the working principle of a typical OHJ CGL composed of 1,4,5,8,9,12-hexaazatriphenylene-hexacarbonitrile (HAT-CN)/ 4,4′,4″-tris(N-3-methylphenyl-N-phenylamino)triphenylamine (m-MTDATA) is studied. We found that the charge generation process in this OHJ results from electron tunneling, which is shown through temperature-dependent J–V characteristics and model fitting. Additionally, we fabricated an ultrahigh efficiency green tandem OLED using only commercially available organic semiconductor materials for OLED. The maximum power efficiency reaches 120 lm/W, yet remains at 110.3 lm/W at 1000 cd/m2, which is greatly enhanced from when compared to the corresponding single-unit device. The maximum current efficiency and external quantum efficiency reach as high a...
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