Fabrication and characterization of red-emitting electroluminescent devices based on thiol-stabilized semiconductor nanocrystals

被引：78

作者：

Bertoni, Cristina ^{[1
]}

Gallardo, Diego

Dunn, Steve

Gaponik, Nikolai

Eychmueller, Alexander

机构：

[1] Cranfield Univ, Sch Appl Sci, Dept Mat, Nanotechnol Ctr, Cranfield MK43 0AL, Beds, England

[2] Tech Univ Dresden, D-01062 Dresden, Germany

来源：

APPLIED PHYSICS LETTERS | 2007年 / 90卷 / 03期

关键词：

D O I：

10.1063/1.2433030

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Thiol-capped CdTe nanocrystals were used to fabricate light-emitting diodes, consisting of an emissive nanocrystal multilayer deposited layer by layer, sandwiched between indium tin oxide and aluminum electrodes. The emissive and electrical properties of devices with different numbers of nanocrystal layers were studied. The improved structural homogeneity of the nanocrystal multilayer allowed for stable and repeatable current- and electroluminescence-voltage characteristics. These indicate that both current and electroluminescence are electric-field dependent. Devices were operated under ambient conditions and a clear red light was detected. The best performing device shows a peak external efficiency of 0.51% and was measured at 0.35 mA/cm(2) and 3.3 V. (c) 2007 American Institute of Physics.

引用

页数：3

共 21 条

[1] Relations between the photoluminescence efficiency of CdTe nanocrystals and their surface properties revealed by synchrotron XPS [J].

Borchert, H ;

Talapin, DV ;

Gaponik, N ;

McGinley, C ;

Adam, S ;

Lobo, A ;

Möller, T ;

Weller, H .

JOURNAL OF PHYSICAL CHEMISTRY B, 2003, 107 (36) :9662-9668

[2] Voltage tunable electroluminescence of CdTe nanoparticle light-emitting diodes [J].

Chen, W ;

Grouquist, D ;

Roark, J .

JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY, 2002, 2 (01) :47-53

[3] Electroluminescence from single monolayers of nanocrystals in molecular organic devices [J].

Coe, S ;

Woo, WK ;

Bawendi, M ;

Bulovic, V .

NATURE, 2002, 420 (6917) :800-803

[4] Tuning the performance of hybrid organic/inorganic quantum dot light-emitting devices [J].

Coe-Sullivan, S ;

Woo, WK ;

Steckel, JS ;

Bawendi, M ;

Bulovic, V .

ORGANIC ELECTRONICS, 2003, 4 (2-3) :123-130

[5]

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

[6] ELECTROLUMINESCENCE FROM CDSE QUANTUM-DOT POLYMER COMPOSITES [J].

DABBOUSI, BO ;

BAWENDI, MG ;

ONITSUKA, O ;

RUBNER, MF .

APPLIED PHYSICS LETTERS, 1995, 66 (11) :1316-1318

[7] Fuzzy nanoassemblies: Toward layered polymeric multicomposites [J].

Decher, G .

SCIENCE, 1997, 277 (5330) :1232-1237

[8]

EFROS AL, 1982, SOV PHYS SEMICOND+, V16, P772

[9] Light emitting devices based on nanostructured semiconductors [J].

Gallardo, DE ;

Bertoni, C ;

Dunn, S .

Photonic Materials, Devices, and Applications, Pts 1 and 2, 2005, 5840 :516-522

[10] Electroluminescence of different colors from polycation/CdTe nanocrystal self-assembled films [J].

Gao, MY ;

Lesser, C ;

Kirstein, S ;

Möhwald, H ;

Rogach, AL ;

Weller, H .

JOURNAL OF APPLIED PHYSICS, 2000, 87 (05) :2297-2302

← 1 2 3 →