Adjustment of Exciton Recombination Zone by Utilizing The Donor of Exciplex as Spacer Layer

GAO Hao-feng; FANG Sheng-huan; ZHANG Ye-feng; LU Qing; LYU Zhao-yue

doi:10.3788/fgxb20173804.0514

您当前的位置：

首页 >

文章列表页 >

Adjustment of Exciton Recombination Zone by Utilizing The Donor of Exciplex as Spacer Layer

更新时间：2020-08-12

- Adjustment of Exciton Recombination Zone by Utilizing The Donor of Exciplex as Spacer Layer
- Chinese Journal of Luminescence Vol. 38, Issue 4, Pages: 514-520(2017)
- 作者机构：
  
  华东理工大学理学院物理系, 上海 200237
- 作者简介：
- 基金信息：
  
  Supported by National Natural Science Foundation of China (11504109);College Students Innovation Training Program of Shanghai (S16089)
- DOI：10.3788/fgxb20173804.0514
  CLC： TN383+.1
- Received：25 October 2016，
  
  Revised：25 November 2016，
  
  Published：05 April 2017
- 稿件说明：
移动端阅览
高浩锋, 方圣欢, 张叶峰等. 激基复合物给体作间隔层对激子复合区域的调节[J]. 发光学报, 2017,38(4): 514-520

GAO Hao-feng, FANG Sheng-huan, ZHANG Ye-feng etc. Adjustment of Exciton Recombination Zone by Utilizing The Donor of Exciplex as Spacer Layer[J]. Chinese Journal of Luminescence, 2017,38(4): 514-520
高浩锋, 方圣欢, 张叶峰等. 激基复合物给体作间隔层对激子复合区域的调节[J]. 发光学报, 2017,38(4): 514-520 DOI： 10.3788/fgxb20173804.0514.

GAO Hao-feng, FANG Sheng-huan, ZHANG Ye-feng etc. Adjustment of Exciton Recombination Zone by Utilizing The Donor of Exciplex as Spacer Layer[J]. Chinese Journal of Luminescence, 2017,38(4): 514-520 DOI： 10.3788/fgxb20173804.0514.

摘要

为研究激基复合物器件激子复合区域的变化'在TPD/BPhen界面可形成激基复合物发光的基础上'以Ir（pq）

（acac）为探测层'制备器件ITO/MoO

（2.5 nm）/TPD（（40-

）nm）/Ir（pq）

（acac）（0.5 nm）/TPD（

x'x

=0'3'6'10 nm）/BPhen（40 nm）/Cs

/Al'其中靠近BPhen的TPD称之为间隔层。电致发光光谱表明'该组器件的激子复合区域主要位于Ir（pq）

（acac）薄层和TPD/BPhen界面'分别发射595 nm和478 nm的光。随着TPD间隔层厚度的增加和电压的升高'发光区域向激基复合物区域（TPD/BPhen界面）移动'即更多的电子和空穴在TPD/BPhen界面形成激基复合物发光'Ir（pq）

（acac）发光减弱。当间隔层厚度由0 nm增至10 nm时'6 V电压下的Ir（pq）

（acac）和激基复合物发光强度的比值由44降至1.5。对于间隔层厚度为6 nm的器件'Ir（pq）

（acac）和激基复合物发光强度的比值由6 V时的2.8降至10 V时的1.0。由此可见'激基复合物给体作间隔层能有效调节激子复合区域。

Abstract

In order to adjust the exciton recombination zone of exciplex-based organic light-emitting diodes

four devices were fabricated by employing Ir(pq)

(acac) as a prober and utilizing the donor of exciplex as a spacer. The device structures are ITO/MoO

(2.5 nm)/TPD((40-

) nm)/Ir(pq)

(acac)(0.5 nm)/TPD(

10 nm)/BPhen(40 nm)/Cs

/Al

where

is the thickness of the spacer layer and the TPD/BPhen interface produces the exciplex emission. The electroluminescent spectra of the four devices include two main peaks:478 nm and 595 nm

which originate from the TPD/BPhen interface and Ir(pq)

(acac) layer

respectively. As both the thickness of TPD spacer and the applied voltage increase

the recombination zone shifts towards TPD/BPhen interface. That is

more electrons and holes recombine at the interface between TPD and BPhen

leading to the decreased intensity of Ir(pq)

(acac) emission. For instance

under an applied voltage of 6 V

the intensity ratio of emission from Ir(pq)

(acac) and exciplex (I

Ir complex

exciplex

) is 44.0 and 1.5 for the devices with 0 and 10 nm spacer

respectively. The value of I

Ir complex

exciplex

decreases from 2.8 at 6 V to 1.0 at 10 V for the device with 6-nm-thick TPD spacer. Therefore

the recombination region can be effectively tuned by utilizing the donor of exciplex as a spacer.

关键词

Keywords

references

TANG C W, VANSLYKE S A. Organic electroluminescent diodes[J]. Appl. Phys. Lett., 1987, 51:913-915.

KIM K H, PARK S Y. Enhancing light-extraction efficiency of OLEDs with high-and low-refractive-index organic-inorganic hybrid materials[J]. Org. Electron., 2016, 36:103-112.

YAMADA S, SHIM C H, EDURA T, et al.. Fabrication of bottom-emitting organic light-emitting diode panels interconnected with encapsulation substrate by Au-Au flip-chip bonding and capillary-driven filling process[J]. Microelectron. Eng., 2016, 161:94-97.

SUN Q J, FAN B H, TAN Z A, et al.. White light from polymer light-emitting diodes:utilization of fluorenone defects and exciplex[J]. Appl. Phys. Lett., 2016, 88(16):163510-1-3.

L Z Y, HOU Y, XIAO J, et al.. Emission spectra dependence on voltage and emissive layer layout in organic light-emitting diodes[J]. Vacuum, 2014, 109:197-199.

L Z Y, HOU Y, XIAO J, et al.. Effects of emissive layer architecture on recombination zone and Frster resonance energy transfer in organic light-emitting diodes[J]. Displays, 2014, 35(5):247-251.

黄晋, 张方辉. BCP对红色有机电致磷光器件效率的影响[J]. 光谱学与光谱分析, 2013, 33(7):1767-1770. HUANG J, ZHANG F H. Influence of BCP on efficiency of red phosphorescent electroluminescent device[J]. Spectrosc. Spectr. Anal., 2013, 33(7):1767-1770. (in Chinese)

李怀坤, 张方辉, 程君, 等. BPhen作为发光层间隔层对黄光OLED的影响[J]. 发光学报, 2016, 37(1):38-43. LI H K, ZHANG F H, CHENG J, et al.. Effects of BPhen as spacer layer in light emitting layer on yellow OLED[J]. Chin. J. Lumin., 2016, 37(1):38-43. (in Chinese)

SEO Y S, MOON D G. Recombination zone shift in phosphorescent white organic light-emitting devices with single host structure of multi-emission layers[J]. Curr. Appl. Phys., 2014, 14(9):1188-1191.

HO C L, WONG W Y, WANG Q, et al.. A multifunctional iridium-carbazolyl orange phosphor for high-performance two-element WOLED exploiting exciton-managed fluorescence/phosphorescence[J]. Adv. Funct. Mater., 2008, 18(6):928-937.

YAN B P, CHEUNG C C C, KUI S C F, et al.. Efficient white organic light-emitting devices based on phosphorescent platinum(Ⅱ)/fluorescent dual-emitting layers[J]. Adv. Mater., 2007, 19(21):3599-3603.

CHEN P, XIE W F, LI J, et al.. White organic light-emitting devices with a bipolar transport layer between blue fluorescent and orange phosphorescent emitting layers[J]. Appl. Phys. Lett., 2007, 91:023505.

WANG Y, HUA Y L, WU X M, et al.. Application of mixed interface in white-electrophosphorescent devices:an efficient approach to adjust the distributions of carriers[J]. Appl. Phys. Lett., 2008, 93:113302.

L Z Y, YIN Y H, XIAO J. Manipulation of recombination zone by utilizing the donor of electroplex as a spacer[J]. J. Lumin., 2016, 179:469-473.

李雪莲, 骆开均, 李祥龙, 等. 新型蓝色荧光材料5,5',6,6'-四苯基-2,2'-联吡嗪的制备和发光性质[J]. 发光学报, 2016, 37(3):257-264. LI X L, LUO K J, LI X L, et al.. Synthesis and luminescence of new blue fluorescent 5,5',6,6'-tetraphenyl-2,2'-bipyrazine[J]. Chin. J. Lumin., 2016, 37(3):257-264. (in Chinese)

KALINOWSKI J, COCCI M, VIRGILI D, et al.. Mixing of excimer and exciplex emission:a new way to improve white light emitting organic electrophosphorescent diodes[J]. Adv. Mater., 2007, 19(22):4000-4005.

MATSUMOTO N, NISHIYAMA M, ADACHI C. Exciplex formations between Tris(8-hydoxyquinolate)aluminum and hole transport materials and their photoluminescence and electroluminescence characteristics[J]. J. Phys. Chem. C, 2008, 112(20):7735-7741.

PARK Y S, KIM K H, KIM J J. Efficient triplet harvesting by fluorescent molecules through exciplexes for high efficiency organic light-emitting diodes[J]. Appl. Phys. Lett., 2013, 102(15):153306-1-5.

LI J, NOMURA H, MIYAZAKI H, et al.. Highly efficient exciplex organic light-emitting diodes incorporating a heptazine derivative as an electron acceptor[J]. Chem. Commun., 2014, 50(46):6174-6176.

CHEN D C, WANG Z H, WANG D, et al.. Efficient exciplex organic light-emitting diodes with a bipolar acceptor[J]. Org. Electron., 2015, 25:79-84.

ZHU H N, XU Z, ZHANG F J, et al.. Exciplex or electroplex emissions from the interface between aromatic diamine and 2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline?[J]. Appl. Surf. Sci., 2008, 254(17):5511-5513.

ZHU J Z, LI W L, HAN L L, et al.. Very broad white-emission spectrum based organic light-emitting diodes by four exciplex emission bands.[J]. Opt. Lett., 2009, 34(19):2946-2948.

WU W, LI F S, NIE C, et al.. Improved performance of flexible white hybrid light emitting diodes by adjusting quantum dots distribution in polymer matrix[J]. Vacuum, 2015, 111:1-4.

NAUENBERG M. The evolution of radiation toward thermal equilibrium:a soluble model that illustrates the foundations of statistical mechanics[J]. Am. J. Phys., 2004, 72(3):313-323.

LAI C C, HUANG M J, CHOU H H, et al.. m-Indolocarbazole derivative as a universal host material for RGB and white phosphorescent OLEDs[J]. Adv. Funct. Mater., 2015, 25(34):5548-5556.

Views

235

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

High Efficiency Hybrid White Organic Light-emitting Diodes Based on Exciplex Host

Research Progress of Electroluminescent Materials and Devices Based on Exciplex Excited State

High Efficiency Doping-free White Organic Light Emitting Diodes by Combining Exciplex and Phosphorescent Ultrathin Layer

Effects of BPhen as Spacer Layer in Light Emitting Layer on Yellow OLED

Improvement of The Field Effect Mobility of OTFT by Using Organic Hole Transport Material

Related Author

LI Jiarui

ZHANG Chunfang

FENG Qi

HAO Yihong

CHEN Jinhui

XUE Rui

LI Dengfeng

BIAN Haodong

Related Institution

School of Instrument Science and Opto-Electronics Engineering， Beijing Information Science and Technology University

Engineering Research Center of Organic and Polymer Optoelectronic Materials， Ministry of Education， Jilin University

Jihua Hengye（Foshan） Electronic Materials Co.， Ltd.

Jihua Laboratory

Key Laboratory of Interface Science and Engineering in Advanced Materials of Ministry of Education, Taiyuan University of Technology

AI问答

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