Ammonia reduced graphene oxides as a hole injection layer for CdSe/CdS/ZnS quantum dot light-emitting diodes

被引：5

作者：

Lou, Qing ^{[1
]}

Ji, Wen-Yu ^{[2
]}

Zhao, Jia-Long ^{[3
]}

Shan, Chong-Xin ^{[1
,2
]}

机构：

[1] Zhengzhou Univ, Sch Phys Engn, Zhengzhou 450052, Peoples R China

[2] Chinese Acad Sci, Changchun Inst Opt Fine Mech & Phys, State Key Lab Luminescence & Applicat, Changchun 130033, Peoples R China

[3] Jilin Normal Univ, Key Lab Funct Mat Phys & Chem, Minist Educ, Siping 136000, Peoples R China

来源：

NANOTECHNOLOGY | 2016年 / 27卷 / 32期

基金：

美国国家科学基金会; 中国国家自然科学基金; 中国博士后科学基金;

关键词：

graphene oxide; hole injection layer; quantum dot; light emitting diodes; POLYMER SOLAR-CELLS; HIGHLY EFFICIENT; TRANSPORT LAYERS; THIN-FILMS; NANOCRYSTALS; DEVICES; TRANSPARENT; DEGRADATION; CONTACT; WATER;

D O I：

10.1088/0957-4484/27/32/325201

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

In this study, we report quantum-dot light-emitting devices (QD-LEDs) using ammonia reduced graphene oxide (rGO) as a hole injection layer (HIL). Compared with pristine GO, QD-LEDs employing rGO as a HIL show higher maximum luminance (936 cd m(-2) versus 699 cd m(-2)) and lower turn-on voltage (V-th, 5.0 V versus 7.5 V). The improved performance can be attributed to the synergistic effect of the improved conductivity (1.27 mu S cm(-1) versus 0.139 mu S cm(-1)) and decreased work function (5.27 eV versus 5.40 eV) of the GO after the reduction process. The above results indicate that ammonia functionalized graphene may be a promising hole injection material for QD-LEDs.

引用

页数：7

共 30 条

[1] Multicolored Light-Emitting Diodes Based on All-Quantum-Dot Multilayer Films Using Layer-by-Layer Assembly Method [J].

Bae, Wan Ki ;

Kwak, Jeonghun ;

Lim, Jaehoon ;

Lee, Donggu ;

Nam, Min Ki ;

Char, Kookheon ;

Lee, Changhee ;

Lee, Seonghoon .

NANO LETTERS, 2010, 10 (07) :2368-2373

[2] Origins of Low Quantum Efficiencies in Quantum Dot LEDs [J].

Bozyigit, Deniz ;

Yarema, Olesya ;

Wood, Vanessa .

ADVANCED FUNCTIONAL MATERIALS, 2013, 23 (24) :3024-3029

[3] Colloidal quantum-dot light-emitting diodes with metal-oxide charge transport layers [J].

Caruge, J. M. ;

Halpert, J. E. ;

Wood, V. ;

Bulovic, V. ;

Bawendi, M. G. .

NATURE PHOTONICS, 2008, 2 (04) :247-250

[4] An environment-friendly preparation of reduced graphene oxide nanosheets via amino acid [J].

Chen, Dezhi ;

Li, Lidong ;

Guo, Lin .

NANOTECHNOLOGY, 2011, 22 (32)

[5]

COLVIN VL, 1994, NATURE, V370, P354, DOI 10.1038/370354a0

[6] Solution-processed, high-performance light-emitting diodes based on quantum dots [J].

Dai, Xingliang ;

Zhang, Zhenxing ;

Jin, Yizheng ;

Niu, Yuan ;

Cao, Hujia ;

Liang, Xiaoyong ;

Chen, Liwei ;

Wang, Jianpu ;

Peng, Xiaogang .

NATURE, 2014, 515 (7525) :96-99

[7] Insulator to Semimetal Transition in Graphene Oxide [J].

Eda, Goki ;

Mattevi, Cecilia ;

Yamaguchi, Hisato ;

Kim, HoKwon ;

Chhowalla, Manish .

JOURNAL OF PHYSICAL CHEMISTRY C, 2009, 113 (35) :15768-15771

[8] Highly Efficient and Low Turn-On Voltage Quantum Dot Light-Emitting Diodes by Using a Stepwise Hole-Transport Layer [J].

ji, Wenyu ;

Lv, Ying ;

Jing, Pengtao ;

Zhang, Han ;

Wang, Jia ;

Zhang, Hanzhuang ;

Zhao, Jialong .

ACS APPLIED MATERIALS & INTERFACES, 2015, 7 (29) :15955-15960

[9] Inverted CdSe/CdS/ZnS quantum dot light emitting devices with titanium dioxide as an electron-injection contact [J].

Ji, Wenyu ;

Jing, Pengtao ;

Zhao, Jialong ;

Liu, Xingyuan ;

Wang, Andrew ;

Li, Haibo .

NANOSCALE, 2013, 5 (08) :3474-3480

[10] Improving the efficiency and reducing efficiency roll-off in quantum dot light emitting devices by utilizing plasmonic Au nanoparticles [J].

Ji, Wenyu ;

Jing, Pengtao ;

Zhao, Jialong .

JOURNAL OF MATERIALS CHEMISTRY C, 2013, 1 (03) :470-476

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