High-quality White Light Emission by Blue-green Organic Light Emitting Devices with Hybrid Color-conversion Layer

Yi-dong YAN; Min QIAN; Hai-fen XIE; Hai-chuan MU

doi:10.37188/CJL.20210217

您当前的位置：

首页 >

文章列表页 >

High-quality White Light Emission by Blue-green Organic Light Emitting Devices with Hybrid Color-conversion Layer

Device Fabrication and Physics | 更新时间：2021-11-23

- High-quality White Light Emission by Blue-green Organic Light Emitting Devices with Hybrid Color-conversion Layer
  增强出版
- Chinese Journal of Luminescence Vol. 42, Issue 11, Pages: 1795-1803(2021)
- 作者机构：
  
  华东理工大学　物理学院，上海　200237
- 作者简介：
- 基金信息：
- DOI：10.37188/CJL.20210217
  CLC： O482.31
- Published：01 November 2021，
  
  Received：22 June 2021，
  
  Revised：10 July 2021，
- 稿件说明：
移动端阅览
YI-DONG YAN, MIN QIAN, HAI-FEN XIE, et al. High-quality White Light Emission by Blue-green Organic Light Emitting Devices with Hybrid Color-conversion Layer. [J]. Chinese journal of luminescence, 2021, 42(11): 1795-1803.
DOI：

YI-DONG YAN, MIN QIAN, HAI-FEN XIE, et al. High-quality White Light Emission by Blue-green Organic Light Emitting Devices with Hybrid Color-conversion Layer. [J]. Chinese journal of luminescence, 2021, 42(11): 1795-1803. DOI： 10.37188/CJL.20210217.

摘要

采用(E)-4-二腈亚甲基-2-叔丁基-6-(1

7-四甲基久洛尼定乙烯基)吡喃(4-(Dicyanomethylene)-2-tert-butyl-6-(1

7-tetramethyljulolidin-4-yl-vinyl)-4H-pyran

DCJTB)分散到PMMA中作为色转换膜(CCL)，分别结合纯蓝光和蓝绿光器件为激发光源制备得到了白光有机发光器件(WOLED)。研究结果表明，使用发光层结构为mCP∶Firpic(10 nm)/ mCP(1 nm)/mCP∶4CzIPN(1.5 nm)的蓝绿光器件作为激发光源时，制备得到的WOLED性能明显优于使用纯蓝光进行激发的WOLED性能，其最大电流效率(CE) 为15.44 cd/A、显色指数(CRI) 77、色坐标(0.320 6

0.369 5)、色转换效率(CCE) 52%。为了进一步展宽电致发光(EL)光谱并提高CRI，将DCJTB和无机荧光粉Sr

∶Eu

按一定比例混合后分散到PMMA中，制备得到复合CCL并将其以不同的速率旋涂到蓝绿光器件背面。结果表明，掺入Sr

∶Eu

后白光OLED的CRI获得明显改善，这是由于通过对CCL厚度的调控，使得掺杂后CCL的红光峰逐渐红移从而引起EL光谱更进一步地展宽；并且当旋涂速率为750 r/min时，获得的WOLED具备最佳的CCL厚度及EL性能，其最大CE、CRI、色坐标、CCE分别达到11.29 cd/A、82、(0.320 6

0.369 5)和34%。

Abstract

The white organic light emitting diodes(OLEDs) were fabricated by employing DCJTB dispersed in PMMA as a color conversion layer(CCL) and pure blue and blue-green OLEDs as excitation sources. The results showed that the electroluminescence(EL) performance of the white OLED(WOLED) employing the blue-green OLEDs as the excitation source with the emitting layer structure of mCP∶Firpic(10 nm)/mCP(1 nm)/mCP∶4CzIPN(1.5 nm) was significantly better than that of the WOLEDs with the pure blue excitation OLEDs

which demonstrated maximum current efficiency(CE) and color rendering index(CRI)

CIE coordinate and color conversion efficiency(CCE) of 15.44 cd/A and 77

(0.320 6

0.369 5) and 52%

respectively. In order to further broaden the EL spectrum and increase the CRI

DCJTB and inorganic phosphor Sr

∶Eu

were mixed in a certain ratio and dispersed in PMMA to fabricate a hybrid material for CCL

which was spin-coated on the backsides of the blue-green OLEDs at various speed. The results showed that the dopant Sr

∶Eu

in the CCL will dramatically improve the CRI of the WOLED due to the broadening of the EL spectrum resulted from the red-shifting of the PL spectrum of doped CCL

via

the modulation of the CCL thickness. The WOLEDs with the optimal doped CCL thickness reveal optimal EL performance with the respective maximum CE

CRI

CIE coordinate and CCE of 11.29 cd/A

(0.320 6

0.369 5) and 34%

respectively

at the spin speed of 750 r/min.

关键词

有机发光器件高质量白光复合色转换膜

Keywords

organic light emitting diode(OLED)high-quality white lighthybrid color-conversion layer

references

LAKSHMANAN R, SHIVAPRAKASH N C, SINDHU S. Switching from sky blue to deep green fluorescent Zn(Ⅱ) complexes for OLEDs applications[J]. J. Lumin., 2018, 196: 136-145.

王振, 甘林, 汪静静, 等. 新型有机电致磷光白光器件的研究[J]. 发光学报, 2016, 37(6): 731-736.

WANG Z, GAN L, WANG J J, et al. Studies on novel white phosphorescent organic light-emitting devices[J]. Chin. J. Lumin., 2016, 37(6): 731-736. (in Chinese)

MCCARTHY M A, LIU B, DONOGHUE E P, et al. Low-voltage, low-power, organic light-emitting transistors for active matrix displays[J]. Science, 2011, 332(6029): 570-573.

YAN F, XING G C, CHEN R, et al. Efficient three-color white organic light-emitting diodes with a spaced multilayer emitting structure[J]. Appl. Phys. Lett., 2015, 106(2): 023302-1-5.

KIM Y H, CHEAH K W, KIM W Y. High efficient white organic light-emitting diodes with single emissive layer using phosphorescent red, green, and blue dopants[J]. Appl. Phys. Lett., 2013, 103(5): 053307-1-4.

REINEKE S, LINDNER F, SCHWARTZ G, et al. White organic light-emitting diodes with fluorescent tube efficiency[J]. Nature, 2009, 459(7244): 234-238.

QI X F, SLOOTSKY M, FORREST S. Stacked white organic light emitting devices consisting of separate red, green, and blue elements[J]. Appl. Phys. Lett., 2008, 93(19): 193306-1-3.

LEE S H, JO D S, KIM B S, et al. Hybrid color-conversion layers for white emission from fluorescent blue organic light-emitting diodes[J]. Curr. Appl. Phys., 2017, 17(8): 1108-1113.

BHANSALI U S, JIA H P, LOPEZ M A Q, et al. Controlling the carrier recombination zone for improved color stability in a two-dopant fluorophore/phosphor white organic light-emitting diode[J]. Appl. Phys. Lett., 2009, 94(20): 203501-1-3.

KOH T W, CHO H, YUN C H, et al. ITO-free down-conversion white organic light-emitting diodes with structured color conversion layers for enhanced optical efficiency and color rendering[J]. Org. Electron., 2012, 13(12): 3145-3153.

周智, 王峰超, 刘素琴, 等. 高效率荧光粉转换型白光有机发光二极管的制备和性能研究[J]. 发光学报, 2012, 33(2): 176-181.

ZHOU Z, WANG F C, LIU S Q, et al. High efficient phosphor-converted white organic light-emitting diodes with red Sr2Si5N8∶Eu2+ color conversion layer[J]. Chin. J. Lumin., 2012, 33(2): 176-181. (in English)

WU X M, JIAO Z Q, HUA Y L, et al. Chromatic-stable white organic light-emitting devices incorporating red color conversion layers[J]. Displays, 2012, 33(3): 168-171.

DUGGAL A R, SHIANG J J, HELLER C M, et al. Organic light-emitting devices for illumination quality white light[J]. Appl. Phys. Lett., 2002, 80(19): 3470-3472.

KRUMMACHER B C, CHOONG V E, MATHAI M K, et al. Highly efficient white organic light-emitting diode[J]. Appl. Phys. Lett., 2006, 88(11): 113506-1-3.

YUAN Y B, LI S, WANG Z, et al. White organic light-emitting diodes combining vacuum deposited blue electrophosphorescent devices with red surface color conversion layers[J]. Opt. Express, 2009, 17(3): 1577-1582.

HO Y H, HUANG D W, CHANG Y T, et al. Improve efficiency of white organic light-emitting diodes by using nanosphere arrays in color conversion layers[J]. Opt. Express, 2012, 20(3): 3005-3014.

LEE S E, OH J H, BAEK H J, et al. Realization of high-color-quality white-by-blue organic light-emitting diodes with yellow and red phosphor films[J]. J. Lumin., 2019, 207: 195-200.

KWONG C Y, DJURIŠIĈ A B, CHUI P C, et al. Improvement of the efficiency of phthalocyanine organic Schottky solar cells with ITO electrode treatment[J]. Appl. Phys. A, 2003, 77(3-4): 555-560.

谢嘉凤, 王振, 陈爱, 等. 基于颜色转换层的有机白光器件性能研究[J]. 光子学报, 2019, 48(6): 0623002-1-7.

XIE J F, WANG Z, CHEN A, et al. Study on performances for white organic light-emitting device based on color conversion layer[J]. Acta Photon. Sinica, 2019, 48(6): 0623002-1-7. (in Chinese)

OH J Y, KIM J H, SEO Y K, et al. Down-conversion light outcoupling films using imprinted microlens arrays for white organic light-emitting diodes[J]. Dyes Pigm., 2017, 136: 92-96.

HU J B, YU Y, JIAO B, et al. Realizing improved performance of down-conversion white organic light-emitting diodes by localized surface plasmon resonance effect of Ag nanoparticles[J]. Org. Electron., 2016, 31: 234-239.

钟锡华. 现代光学基础[M]. 第2版. 北京: 北京大学出版社, 2012.

ZHONG X H. Modern Fundamentals of Optics[M]. 2nd ed. Beijing: Peking University Press, 2012. (in Chinese)

马晨, 王华, 郝玉英, 等. 一种新型结构的黄光有机电致发光器件[J]. 光谱学与光谱分析, 2008, 28(7): 1479-1482.

MA C, WANG H, HAO Y Y, et al. A novel yellow organic light-emitting device[J]. Spectrosc. Spect. Anal., 2008, 28(7): 1479-1482. (in Chinese)

徐文飞, 王海波, 张瑞西, 等. 白光LED用红色荧光粉的研究进展[J]. 化工新型材料, 2011, 39(3): 10-12.

XV W F, WANG H B, ZHANG R X, et al. Progress of the research of red-emitting phosphor for W-LED[J]. New Chem. Mater., 2011, 39(3): 10-12. (in Chinese)

Views

263

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

Negative Resistance Characteristic of Organic Dye-doping Polymer Thin Films Devices

Related Author

Yi-dong YAN

Min QIAN

Hai-fen XIE

Hai-chuan MU

XU Xin-hua

HAN Ming-chuan

YIN Shou-gen

Related Institution

Department of Physics， School of Science， East China University of Science and Technology

School of Materials Science and Engineering, Tianjin University

Institute of Material Physics, Tianjin Institute of Technology

Address：No.3888 Dong Nanhu Road, Changchun, Jilin, China Postal code：130033
Tel：0431-86176862 Email：fgxbt@126.com
Technical support is provided by Beijing Founder electronics co., LTD 吉ICP备11002662号-17 京公网安备11010802024621
It is recommended to read the content of this site in Chrome&IE9+. Please switch to extreme mode in browser 360.
Cookies We use cookies to help provide and enhance our service and tailor content. By continuing, you agree to the use of cookies.

⁰