Characteristic of tandem organic light-emitting diodes with charge generation layer of LiF/Al/F4-TCNQ/NPB

JING Shu; WANG Hua; LIU Hui-hui; DU Xiao-gang; MIAO Yan-qin; PAN Cheng-long; ZHOU He-feng

doi:10.3788/YJYXS20142906.0886

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Characteristic of tandem organic light-emitting diodes with charge generation layer of LiF/Al/F4-TCNQ/NPB

Table of contents | 更新时间：2020-08-12

- Characteristic of tandem organic light-emitting diodes with charge generation layer of LiF/Al/F4-TCNQ/NPB
- Chinese Journal of Liquid Crystals and Displays Vol. 29, Issue 6, Pages: 886-892(2014)
- 作者机构：
  
  1. 太原理工大学新材料界面科学与工程教育部重点实验室,山西太原,030024
  2. 太原理工大学新材料工程技术研究中心, 山西太原 030024
  3. 太原理工大学材料科学与工程学院, 山西太原 030024
- 作者简介：
- 基金信息：
- DOI：10.3788/YJYXS20142906.0886
  CLC： TP394.1;TH691.9
- Received：25 March 2014，
  
  Revised：17 April 2014，
  
  Published：05 December 2014
- 稿件说明：
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景姝, 王华, 刘慧慧, 杜晓刚, 苗艳勤, 潘成龙, 周禾丰. 基于LiF/Al/F4-TCNQ/NPB电荷产生层的叠层有机电致发光器件的特性研究[J]. 液晶与显示, 2014,29(6): 886-892

JING Shu, WANG Hua, LIU Hui-hui, DU Xiao-gang, MIAO Yan-qin, PAN Cheng-long, ZHOU He-feng. Characteristic of tandem organic light-emitting diodes with charge generation layer of LiF/Al/F4-TCNQ/NPB[J]. , 2014,29(6): 886-892
景姝, 王华, 刘慧慧, 杜晓刚, 苗艳勤, 潘成龙, 周禾丰. 基于LiF/Al/F4-TCNQ/NPB电荷产生层的叠层有机电致发光器件的特性研究[J]. 液晶与显示, 2014,29(6): 886-892 DOI： 10.3788/YJYXS20142906.0886.

JING Shu, WANG Hua, LIU Hui-hui, DU Xiao-gang, MIAO Yan-qin, PAN Cheng-long, ZHOU He-feng. Characteristic of tandem organic light-emitting diodes with charge generation layer of LiF/Al/F4-TCNQ/NPB[J]. , 2014,29(6): 886-892 DOI： 10.3788/YJYXS20142906.0886.

摘要

采用结构为LiF/Al/F4-TCNQ/NPB的电荷产生层，制备出了双发光单元叠层有机电致发光器件（OLED：Organic Light Emitting Device）。通过对比实验发现当F4-TCNQ层的厚度为8 nm、Al层的厚度为5 nm时，电荷产生层产生电荷的能力较强且具有良好的透光率。基于此，本文制备了发光层为CBP：6%Ir（ppy）

的叠层OLED，通过与单发光单元OLED的性能比较发现：采用LiF/Al/F4-TCNQ/NPB作为电荷产生层制备的叠层OLED的最大电流效率与功率效率分别为51.6 cd/A、28.4 lm/W，为单发光单元OLED的2.16倍、1.8倍，此外采用这种结构的电荷产生层有效解决了叠层OLED由于工作电压高而导致功率效率并未得到提升的问题；另一方面，采用有机材料F4-TCNQ代替传统无机金属氧化物作为电荷产生层中的电荷产生部分，能够避免无机金属氧化物高温升华对Al层薄膜的破坏，提升了器件的效率并且降低了器件的roll-off现象。

Abstract

A novel type of tandem organic light emitting device(OLED) was demonstrated by employing LiF/Al/F4-TCNQ/NPB as charge generation layer(CGL). By contrast experiment

it is suggested that the optimum thickness of F4-TCNQ and Al in CGL is 8 nm and 5 nm

respectively

which exhibits the good ability of generating charges and higher optical transmittance.Based on the optimized structure of CGL

we fabricated the tandem OLED with the emission layer of CBP:6%Ir(ppy)

. By comparing the device performance of the tandem OLED and conventional single OLED

it was found that the highest current efficiency and power efficiency were 51.6 cd/A and 28.4 lm/W

which was 2.16 times and 1.8 times as high as that of single OLED

respectively.In conclusion

the tandem OLED with the CGL of LiF/Al/F4-TCNQ/NPB can improve the power efficiency of OLED. In addition

replacing conventional inorganic metal oxide with organic material of F4-TCNQ in CGL can avoid the destruction of film formation of Al layer

inducing in improving in performance and weakening the efficiency roll-off phenomenon.

关键词

Keywords

references

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College of Science and Engineering, Jinan University, Guangzhou 510632, China, E-mail: thlt@jnu.edu.

陕西科技大学电气与信息工程学院, 陕西西安 710021,E-mail:xjf605@yahoo.com.cn

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