Research on Top-emitting Green Quantum Dots Light-emitting Devices

LIU Shi-hao; ZHANG Xiang; ZHANG Le-tian; XIE Wen-fa

doi:10.3788/fgxb20183902.0156

您当前的位置：

首页 >

文章列表页 >

Research on Top-emitting Green Quantum Dots Light-emitting Devices

更新时间：2020-08-12

- Research on Top-emitting Green Quantum Dots Light-emitting Devices
- Chinese Journal of Luminescence Vol. 39, Issue 2, Pages: 156-161(2018)
- 作者机构：
  
  集成光电子学国家重点联合实验室吉林大学实验区, 吉林大学电子科学与工程学院,吉林长春,130012
- 作者简介：
- 基金信息：
  
  Supported by National Natural Science Foundation of China(61474054,61475060)
- DOI：10.3788/fgxb20183902.0156
  CLC： TN383+.1
- Received：05 May 2017，
  
  Revised：06 July 2017，
  
  Published Online：16 August 2017，
  
  Published：05 February 2018
- 稿件说明：
移动端阅览
刘士浩, 张祥, 张乐天等. 顶发射绿光量子点电致发光器件[J]. 发光学报, 2018,39(2): 156-161

LIU Shi-hao, ZHANG Xiang, ZHANG Le-tian etc. Research on Top-emitting Green Quantum Dots Light-emitting Devices[J]. Chinese Journal of Luminescence, 2018,39(2): 156-161
刘士浩, 张祥, 张乐天等. 顶发射绿光量子点电致发光器件[J]. 发光学报, 2018,39(2): 156-161 DOI： 10.3788/fgxb20183902.0156.

LIU Shi-hao, ZHANG Xiang, ZHANG Le-tian etc. Research on Top-emitting Green Quantum Dots Light-emitting Devices[J]. Chinese Journal of Luminescence, 2018,39(2): 156-161 DOI： 10.3788/fgxb20183902.0156.

摘要

采用核壳结构的绿光CdSSe/ZnS量子点成功制备了顶发射绿光量子点器件，并详细研究了它的光电特性。与具有相同结构的底发射器件相比，顶发射器件在亮度、效率、色纯度、光谱的电压稳定性上都得到了显著提高。在相同电压7 V下，尽管底发射具有更大的电流密度，但亮度仅为831 cd/m

，而顶发射器件的亮度则可达到1 350 cd/m

，并且顶发射器件的最高亮度可达到7 112 cd/m

。在效率上，顶发射器件的最大电流效率可达6.54 cd/A，远大于底发射器件的1.89 cd/A。在光谱方面，在底发射器件中出现的红蓝部分的杂光在顶发射器件中完全被抑制，而且顶发射光谱的半高宽显著窄化，具有更高的色纯度。当电压从4 V变化到9 V时，顶发射器件光谱始终保持稳定，色坐标移动仅为（-0.005，-0.001）。结果表明，顶发射结构有利于提高量子点器件的亮度、效率、色纯度以及光谱的电压稳定性。

Abstract

Green top emitting OLEDs were fabricated by using green CdSSe/ZnS quantum dots with core-shell structure. The photoelectric properties of the devices were studied in detail. Compared to the bottom emitting device with the similar structure

the top emitting device was significantly improved in brightness

efficiency

color purity

and voltage stability of the spectrum. Under the same voltage of 7 V

although the bottom emitting device has greater current density

the brightness is only 831 cd/m

while the brightness of the top emitting device can reach 1 350 cd/m

and the highest brightness can reach 7 112 cd/m

. In efficiency

the maximum current efficiency of the top emitting device can reach 6.54 cd/A

which is far greater than 1.89 cd/A of the bottom emitting device. In terms of spectrum

the red and blue parts of the bottom emitting devices are completely suppressed in the top emitting devices

and the half height width of the top emission spectrum is significantly narrowed with higher color purity. When the voltage varies from 4 V to 9 V

the spectrum of the top emitting device remains stable

and the color coordinates move only (-0.005

-0.001). The results show that the top emission structure is beneficial to improve the luminance

efficiency

color purity and voltage stability of the quantum dots.

关键词

Keywords

references

ANIKEEVA P O, HALPERT J E, BAWENDI M G, et al.. Quantum dot light-emitting devices with electroluminescence tunable over the entire visible spectrum[J]. Nano Lett., 2009, 9(9):2532-2536.

LIU S, LIU W, JI W, et al.. Top-emitting quantum dots light-emitting devices employing microcontact printing with electricfield-independent emission[J]. Sci. Rep-UK, 2016, 6:22530.

YANG Y, ZHENG Y, CAO W, et al.. In high-efficiency light-emitting devices based on quantum dots with tailored nanostructures[J]. Nat. Photon., 2015, 9:259-266.

MASHFORD B S, STEVENSON M, POPOVIC Z, et al.. High-efficiency quantum-dot light-emitting devices with enhanced charge injection[J]. Nat. Photon., 2013, 7(5):407-412.

LEE K H, LEE J H, SONG W S, et al.. Highly efficient, color-pure, color-stable blue quantum dot light-emitting devices[J]. ACS Nano, 2013, 7(8):7295-7302.

ZHAO J, BARDECKER J A, MUNRO A M, et al.. Efficient CdSe/CdS quantum dot light-emitting diodes using a thermally polymerized hole transport layer[J]. Nano Lett., 2006, 6(3):463-467.

KIM H M, MOHDYUSOFF A R, KIM T W, et al.. Semi-transparent quantum-dot light emitting diodes with an inverted structure[J]. J. Mater. Chem. C, 2014, 2(12):2259-2265.

LECK K S, DIVAYANA Y, ZHAO D, et al.. Quantum dot light-emitting diode with quantum dots inside the hole transporting layers[J]. ACS Appl. Mater. Interf., 2013, 5(14):6535-6540.

QIAN L, ZHENG Y, XUE J, et al.. Stable and efficient quantum-dot light-emitting diodes based on solution-processed multilayer structures[J]. Nat. Photon., 2011, 5(9):543-548.

JI W, JING P, ZHANG L, et al.. The work mechanism and sub-bandgap-voltage electroluminescence in inverted quantum dot light-emitting diodes[J]. Sci Rep-UK, 2014, 4(6):6974-6974.

SHIRASAKI Y, SUPRAN G J, BAWENDI M G, et al.. Emergence of colloidal quantum-dot light-emitting technologies[J]. Nat. Photon., 2013, 7(1):13-23.

KOVALENKO M V, SCHEELE M, TALAPIN D V. Colloidal nanocrystals with molecular metal chalcogenide surface ligands[J]. Science, 2009, 324(5933):1417-1420.

DAI X, ZHANG Z, JIN Y, et al.. Solution-processed, high-performance light-emitting diodes based on quantum dots[J]. Nature, 2014, 515(7525):96-99.

JI W, LIU S, ZHANG H, et al.. Ultrasonic spray processed, highly efficient all-inorganic quantum-dot light-emitting diodes[J]. ACS Photon., 2017, 4(5):DOI:10.1021/acsphotonics.7b00216.

HOFMANN S, THOMSCHKE M, LVSSEM B, et al.. Top-emitting organic light-emitting diodes[J]. Opt. Express, 2011, 19(23):A1250-A1264.

JORDAN R H, DODABALAPUR A, SLUSHER R E. Efficiency enhancement of microcavity organic light emitting diodes[J]. Appl. Phys. Lett., 1996, 69(14):1997-1999.

SCHOLZ S, HUANG Q, THOMSCHKE M, et al.. Self-doping and partial oxidation of metal-on-organic interfaces for organic semiconductor devices studied by chemical analysis techniques[J]. J. Appl. Phys., 2008, 104(10):104502.

EMPEDOCLES S A, BAWENDI M G, Quantum-confined stark effect in single CdSe nanocrystallite quantum dots[J]. Science, 1997, 278(5346):2114-2117.

SHIRASAKI Y, SUPRAN G J, TISDALE W A, et al.. Origin of efficiency roll-off in colloidal quantum-dot light-emitting diodes[J]. Phys. Rev. Lett., 2013, 110(21):217403.

THOMSCHKE M, REINEKE S, LVSSEM B, et al.. Highly efficient white top-emitting organic light-emitting diodes comprising laminated microlens films[J]. Nano Lett., 2012, 12(1):424-428.

RIEL H, KARG S, BEIERLEIN T, et al.. Phosphorescent top-emitting organic light-emitting devices with improved light outcoupling[J]. Appl. Phys. Lett., 2003, 82(3):1537052.

Views

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

Perovskite Based Broadband Photodetector

Rapid Detection of Neonicotinoids by Metal Halide CH₃NH₃PbBr₃ Perovskite Quantum Dots

Current Status and Challenges in Indium Phosphide Quantum Dots and Their Electroluminescence

Color Conversion Characteristics of Micro-LED Based on Quantum Dot@Ordered Mesoporous Composite Materials

PbS Quantum Dot Doped Polymer Broadband Optical Fiber Amplifier

Related Author

LU Menghan

SONG Hongwei

CHEN Cong

ZHOU Ranfeng

PENG Maomin

LIU Li

YIN Xiaoli

PENG Xitian

Related Institution

School of Material Science and Engineering， Hebei University of Technology

State Key Laboratory of Integrated Optoelectronics， College of Electronic Science and Engineering， Jilin University

Hubei Key Laboratory of Nutritional Quality and Safety of Agro Products， Institute of Agricultural Quality Standards and Testing Technology Research， Hubei Academy of Agricultural Science

College of Life Science， Yangtze University

Key Laboratory of New Display Materials and Devices， Ministry of Industry and Information Technology， School of Materials Science and Engineering， Nanjing University of Science and 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