|本期目录/Table of Contents|

[1]张明,郝立成,冯晓东.光子晶体结构增强有机发光二极管出光效率的理论计算[J].南京工业大学学报(自然科学版),2020,42(01):27-33.[doi:10.3969/j.issn.1671-7627.2020.01.004]
 ZHANG Ming,HAO Licheng,FENG Xiaodong.Theoretical calculation of enhancing the extraction efficiency of organic light-emitting diodes by photonic crystals[J].Journal of NANJING TECH UNIVERSITY(NATURAL SCIENCE EDITION),2020,42(01):27-33.[doi:10.3969/j.issn.1671-7627.2020.01.004]
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光子晶体结构增强有机发光二极管出光效率的理论计算()
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《南京工业大学学报(自然科学版)》[ISSN:1671-7627/CN:32-1670/N]

卷:
42
期数:
2020年01期
页码:
27-33
栏目:
出版日期:
2020-01-13

文章信息/Info

Title:
Theoretical calculation of enhancing the extraction efficiency of organic light-emitting diodes by photonic crystals
文章编号:
1671-7627(2020)01-0027-07
作者:
张明郝立成冯晓东
南京工业大学 材料科学与工程学院,江苏 南京 211800
Author(s):
ZHANG Ming HAO Licheng FENG Xiaodong
College of Materials Science and Engineering, Nanjing Tech University, Nanjing 211800,China
关键词:
有机发光二极管 出光效率 有限时域差分 光子晶体 折射率 增强系数
Keywords:
organic light-emitting diodes extraction efficiency finite difference time domain photonic crystals refractive index enhancement factor
分类号:
TN383
DOI:
10.3969/j.issn.1671-7627.2020.01.004
文献标志码:
A
摘要:
有机发光二极管(OLED)中产生的光在进入空气的过程中,会因材料折射率的不匹配而产生全内反射现象,极大地限制了器件的出光效率,最终只有20%的光能够进入空气中。采用有限时域差分(FDTD)的理论计算方法,在OLED器件中嵌入由高折射率与低折射率材料组成的光子晶体结构,研究了不同光子晶体周期、深度以及折射率参数对器件出光效率的影响。结果表明:在可见光范围内(400~700 nm),光子晶体的深度为0.45 μm、周期为1.4 μm、占空比为50%以及介质1与介质2折射率为2.2:1.0时,光子晶体OLED器件的平均出光效率提高到40.7%,平均增强系数为122%。
Abstract:
The light extraction efficiency of organic light emitting diodes(OLED)is greatly limited due to total internal reflection, which is caused by different refractive indexes of materials. It is well-known that only 20% of the light can be out-coupling from a conventional OLED. In order to solve the key problem of low light extraction efficiency, the optical performance of OLED by finite difference time domain(FDTD)was investigated theoretically. Based on the FDTD optical solver, a conventional OLED optical model was built and one-dimensional photonic crystal(PC)with high and low refractive indices was inserted. The effects of different photonic crystal period, depth and refractive index on the light extraction efficiency of the device were considered. Results showed that when the depth of the PC was 0.45 μm, the period was1.4 μm, the duty ratio was 50%, the refractive index of the dielectric 1 was 2.2 and the dielectric 2 was 1.0, the average extraction efficiency of the device in the visible light band was up to 40.7%, and the enhancement factor was 122%.

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相似文献/References:

[1]朱成顺,冯晓东.NPB/Alq3有机发光二极管的光学模拟[J].南京工业大学学报(自然科学版),2014,36(05):52.[doi:10.3969/j.issn.1671-7627.2014.05.010]
 ZHU Chengshun,FENG Xiaodong.Optical simulation of NPB/Alq3 based organic light emitting diodes[J].Journal of NANJING TECH UNIVERSITY(NATURAL SCIENCE EDITION),2014,36(01):52.[doi:10.3969/j.issn.1671-7627.2014.05.010]

备注/Memo

备注/Memo:
收稿日期:2018-06-13
基金项目:江苏高校优势学科建设工程(PAPD)
作者简介:张明(1992—),男,E-mail:1041963688@njtech.edu.cn; 冯晓东(联系人),教授,E-mail:xiaodong.feng@njtech.edu.cn.
引用格式:张明,郝立成,冯晓东.光子晶体结构增强有机发光二极管出光效率的理论计算[J].南京工业大学学报(自然科学版),2020,42(1):27-33.
ZHANG Ming, HAO Licheng, FENG Xiaodong. Theoretical calculation of enhancing the extraction efficiency of organic light-emitting diodes by photonic crystals[J].Journal of Nanjing Tech University(Natural Science Edition),2020,42(1):27-33..
更新日期/Last Update: 2020-01-30