Electroluminescence from CdSe quantum‐dot/polymer composites
作者:
B. O. Dabbousi,
M. G. Bawendi,
O. Onitsuka,
M. F. Rubner,
期刊:
Applied Physics Letters
(AIP Available online 1995)
卷期:
Volume 66,
issue 11
页码: 1316-1318
ISSN:0003-6951
年代: 1995
DOI:10.1063/1.113227
出版商: AIP
数据来源: AIP
摘要:
Electroluminescence is obtained from nearly monodisperse CdSe nanocrystallites (quantum dots) incorporated into thin films (1000 A˚) of polyvinylcarbazole (PVK) and an oxadiazole derivative (t‐Bu‐PBD) and sandwiched between ITO and Al electrodes. The electroluminescence and photoluminescence spectra (bandwidths ≤40 nm) are nearly identical at room temperature and are tunable from ∼530 to ∼650 nm by varying the size of the dots. Voltage studies at 77 K indicate that while only the dots electroluminesce at the lower voltages, both the dots and the PVK matrix electroluminesce at higher applied voltages. Variable temperature studies indicate that the electroluminescence efficiency increases substantially as the films are cooled down to cryogenic temperatures. ©1995 American Institute of Physics.
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