基于颜色转换层的有机白光器件性能研究

谢嘉凤; 王振; 陈爱; 王培; 肖飞; 陈家雯; 卢永生; 张文霞; 王玉婵

doi:doi:10.3788/gzxb20194806.0623002

光子学报, 2019, 48 (6): 0623002, 网络出版: 2019-07-10

基于颜色转换层的有机白光器件性能研究

Study on Performances for White Organic Light-emitting Device Based on Color Conversion Layer

论文大纲

谢嘉凤 ^1,*王振 ¹陈爱 ¹王培 ¹肖飞 ²陈家雯 ¹卢永生 ¹张文霞 ¹王玉婵 ¹

作者单位

¹ 重庆邮电大学光电工程学院, 重庆 400065

² 重庆南岸教师进修学院, 重庆 400060

摘要

以DCJTB为颜色转换层, 结合双蓝色发光层有机电致发光器件制备了结构为PMMA∶DCJTB(x%)/ITO/NPB(30 nm)/mCP(5 nm)/mCP∶Firpic(8%, 30 nm)/TPBi∶Firpic(8%, 10 nm)/TmPyPB(30 nm)/Cs2CO3(1 nm)/Al(x=0.7, 1.0, 1.5)的白色有机发光器件.结果表明, 器件的效率和显示性可通过DCJTB浓度加以调控,当DCJTB浓度为1.0%时, 器件拥有最佳性能, 其最大电流效率、色坐标和显色指数分别为13.4 cd·A－1、(0.33, 0.31)和69.为进一步提高器件效率和显色性, 在发光层TPBi∶Firpic与电子传输层TmPyPB之间插入TPBi/TPBi∶Ir(ppy)3结构, 研究表明: 该插入结构能丰富器件发光颜色, 增大颜色转换层的有效吸收光量; 同时可限制激子复合区域, 提升激子利用率, 实现了器件效率和显色性能的同时提升.获得的白光器件最大电流效率和显色指数分别为17.8 cd·A－1和81, 分别提升了33%和17%, 色坐标仅漂移(0.02, 0.02).

Abstract

A White Organic Light-Emitting Device(WOLED) was realized by combining dual-emission blue organic light-emitting device of ITO/NPB(30 nm)/mCP(5 nm)/mCP∶Firpic(8%, 30 nm)/TPBi∶Firpic (8%, 10 nm)/TmPyPB(30 nm)/Cs2CO3(1 nm)/Al with color conversion layer based on PMMA∶DCJTB. Experimental results indicate that the current efficiency and Color Rendering Index(CRI) can be controlled by adjusting the concentration of DCJTB in color conversion layer. The maximum current efficiency, Commission Internationale de L′Eclairage(CIE) and CRI are 13.4 cd·A－1, (0.33, 0.31) and 69, respectively, when the concentration of DCJTB is 1.0%. To further improve the device performances, TPBi/TPBi∶Ir(ppy)3 was inserted between the emission layer of TPBi∶Firpic and the electron transport layer of TmPyPB. It is illustrated that the inserted structure can improve the CRI, increase the effective absorption of color conversion layer, and limit the recombination region of excitons to enhance the optoelectronic performances of the device. The maximum current efficiency, CIE and CRI for optimal WOLED reach 17.8 cd·A－1, (0.35, 0.33) and 81, respectively.

参考文献

[1] ANGEL F A, WALLACE J U, TANG C W. Effect of lithium and silver diffusion in single-stack and tandem OLED devices［J］.Organic Electronics, 2017, 42(3): 102-106.

[2] 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 Zhen, GAN Lin, WANG Jing-jing, et al. Studies on novel phosphorescent organic light-emitting devices［J］.Chinese Journal of Luminescence, 2016, 37(6): 731-736.

[3] OLIVA J, PAPADIMITRATOS A, CRUZ E D L R, et al. Tuning color temperature of white OLEDs in parallel tandems［J］. Physica Status Solidi, 2017, 214(11): 1700283.

[4] ZHOU N, WANG S, YIN X, et al. Double light-emitting layer implementing three-color emission: Using DCJTB lightly doping in Alq3 as red-green emitting layer and APEAn1N as blue-green emitting layer［J］. Journal of Luminescence, 2018, 196(4): 40-49.

[5] REINEKE S, LINDNER F, SCHWARTZ G, et al. White organic light-emitting diodes with fluorescent tube efficiency ［J］. Nature, 2009, 1212(7244): 234-8.

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

[7] WANG P, WANG Z, CHEN A, et al. Optimization for white organic light-emitting diode based on DCJTB as color conversion layer ［J］. International Journal of Modern Physics B, 2018, 32(27): 1850299.

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

[9] SONG D, BAE I J, SRIVASTAVA A K, et al. Fabrication of hybrid white OLEDs with an inorganic color conversion layer［J］. Molecular Crystals and Liquid Crystals, 2016, 636(1): 52-59.

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

[11] KRUMMACHER B C, CHOONG V E, MATHAI M K, et al. Highly efficient white organic light-emitting diode［J］. Applied Physics Letters, 2006, 88(11): 113506.

[12] 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 and Pigments, 2016, 136(1): 92-96.

[13] YIN M, YU Z, PAN T, et al. Efficient and angle-stable white top-emitting organic light emitting devices with patterned quantum dots down-conversion films ［J］. Organic Electronics, 2018, 56(9): 46-50.

[14] LEE J, CHOPRA N, BERA D, et al. Down-conversion white organic light-emitting diodes using microcavity structure［J］. Advanced Energy Materials, 2011, 1(2): 174-178.

[15] BERA D, XUE J, SO F, et al. Optimization of down-conversion phosphor films for high efficiency white organic light-emitting diodes ［J］. Journal of Photonics for Energy, 2011, 1(1): 252-256.

[16] JANG J S, LEE K S, LEE E J, et al. Enhancement of the color rendering index of white organic light-emitting devices based on a blue and red emitting layer with a Y3Al5O12: Ce3+ green phosphor color-conversion layer［J］. Journal of Nanoscience & Nanotechnology, 2015, 15(1): 562.

[17] 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］. Current Applied Physics, 2017, 17(8): 1108-1113.

[18] 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］.Journal of Luminescence, 2019, 207(3): 195-200.

[19] KWONG C Y, DJURII A B, CHUI P C, et al. Improvement of the efficiency of phthalocyanine organic Schottky solar cells with ITO electrode treatment［J］. Applied Physics A, 2003, 77(3-4): 555-560.

[20] 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］. 光谱与光谱分析, 2008, 28(7): 1479-1482.

MA Chen, WANG Hua, HAO Yu-ying, et al. A novel structure of yellow electroluminescence device ［J］. Spectrum and Spectral Analysis, 2008, 28(7): 479-1482.

[21] WU S, AONUMA M, ZHANG Q, et al. High-efficiency deep-blue organic light-emitting diodes based on a thermally activated delayed fluorescence emitter［J］. Journal of Materials Chemistry C, 2014, 2(3): 421-424.

谢嘉凤, 王振, 陈爱, 王培, 肖飞, 陈家雯, 卢永生, 张文霞, 王玉婵. 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. XIE Jia-feng, WANG Zhen, CHEN Ai, WANG Pei, XIAO Fei, CHEN Jia-wen, LU Yong-sheng, ZHANG Wen-xia, WANG Yu-chan. Study on Performances for White Organic Light-emitting Device Based on Color Conversion Layer[J]. ACTA PHOTONICA SINICA, 2019, 48(6): 0623002.

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