Highly Emissive and Color-Tunable CuInS2-Based Colloidal Semiconductor Nanocrystals: Off-Stoichiometry Effects and Improved Electroluminescence Performance

被引:474
作者
Chen, Bingkun [1 ]
Zhong, Haizheng [1 ]
Zhang, Wenqing [2 ]
Tan, Zhan'ao [2 ]
Li, Yongfang [3 ]
Yu, Cairan [4 ]
Zhai, Tianyou [5 ]
Bando, Yoshio [5 ]
Yang, Shengyi [1 ]
Zou, Bingsuo [1 ]
机构
[1] Beijing Inst Technol, Micro Nano Res Ctr, Sch Mat Sci & Engn, Beijing 100081, Peoples R China
[2] N China Elect Power Univ, New & Renewable Energy Beijing Key Lab, State Key Lab Alternate Elect Power Syst Renewabl, Beijing 102206, Peoples R China
[3] Chinese Acad Sci, Inst Chem, CAS Key Lab Organ Solids, Beijing 100190, Peoples R China
[4] Chinese Acad Sci, Inst Chem, CAS Key Lab Photochem, Beijing 100190, Peoples R China
[5] Natl Inst Mat Sci, Int Ctr Mat Nanoarchitecton MANA, Tsukuba, Ibaraki 3050044, Japan
关键词
CuInS2; colloidal nanocrystals; photoluminescence; electroluminescence; light-emitting diodes; LIGHT-EMITTING-DIODES; OPTICAL-PROPERTIES; QUANTUM DOTS; CUINSE2; NANOCRYSTALS; PHOTOLUMINESCENCE; MONODISPERSE; CUGASE2; INKS;
D O I
10.1002/adfm.201102496
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
The off-stoichiometry effects and gram-scale production of luminescent CuInS2-based semiconductor nanocrystals, as well as their application in electroluminescence devices are reported. The crystal structures and optical properties of CuInS2 nanocrystals can be significantly influenced by controlling their [Cu]/[In] molar ratio. A simple model adapted from the bulk materials is proposed to explain their off-stoichiometry effects. Highly emissive and color-tunable CuInS2-based NCs are prepared by a combination of [Cu]/[In] molar ratio optimization, ZnS shell coating, and CuInS2ZnS alloying. The method is simple, hassle-free, and easily scalable to fabricate tens of grams of nanocrystal powders with photoluminescence quantum yields up to around 65%. Furthermore, the performance of high-quality CuInS2-based NCs in electroluminescence devices is examined. These devices have lower turn-on voltages of around 5 V, brighter luminance up to approximately 2100 cd m-2 and improved injection efficiency of around 0.3 lm W-1 (at 100 cd m-2) in comparison to recent reports.
引用
收藏
页码:2081 / 2088
页数:8
相关论文
共 60 条
[1]   Quantum Dot Light-Emitting Devices with Electroluminescence Tunable over the Entire Visible Spectrum [J].
Anikeeva, Polina O. ;
Halpert, Jonathan E. ;
Bawendi, Moungi G. ;
Bulovic, Vladimir .
NANO LETTERS, 2009, 9 (07) :2532-2536
[2]   Design of fluorescent materials for chemical sensing [J].
Basabe-Desmonts, Lourdes ;
Reinhoudt, David N. ;
Crego-Calama, Mercedes .
CHEMICAL SOCIETY REVIEWS, 2007, 36 (06) :993-1017
[3]   Synthesis and characterization of colloidal CuInS2 nanoparticles from a molecular single-source precursor [J].
Castro, SL ;
Bailey, SG ;
Raffaelle, RP ;
Banger, KK ;
Hepp, AF .
JOURNAL OF PHYSICAL CHEMISTRY B, 2004, 108 (33) :12429-12435
[4]   Quantum dot bioconjugates for ultrasensitive nonisotopic detection [J].
Chan, WCW ;
Nie, SM .
SCIENCE, 1998, 281 (5385) :2016-2018
[5]  
COLVIN VL, 1994, NATURE, V370, P354, DOI 10.1038/370354a0
[6]   DEFECT LEVEL IDENTIFICATION IN CUINSE2 FROM PHOTOLUMINESCENCE STUDIES [J].
DAGAN, G ;
ABOUELFOTOUH, F ;
DUNLAVY, DJ ;
MATSON, RJ ;
CAHEN, D .
CHEMISTRY OF MATERIALS, 1990, 2 (03) :286-293
[7]   Semiconductor-Nanocrystals-Based White Light-Emitting Diodes [J].
Dai, Quanqin ;
Duty, Chad E. ;
Hu, Michael Z. .
SMALL, 2010, 6 (15) :1577-1588
[8]  
DEMAS JN, 1971, J PHYS CHEM-US, V75, P991, DOI 10.1021/j100678a001
[9]   Shape- and phase-controlled synthesis of monodisperse, single-crystalline ternary chalcogenide colloids through a convenient solution synthesis strategy [J].
Du, Weimin ;
Qian, Xuefeng ;
Yin, Jie ;
Gong, Qiang .
CHEMISTRY-A EUROPEAN JOURNAL, 2007, 13 (31) :8840-8846
[10]   Semiconductor nanocrystals as rare-earth alternatives [J].
Erdem, Talha ;
Demir, Hilmi Volkan .
NATURE PHOTONICS, 2011, 5 (03) :126-126