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Direct evidence of delayed electroluminescence from carbon nanotubes on the macroscale

Authors :
Dawid Janas
Krzysztof K. K. Koziol
Nikodem Czechowski
Sebastian Mackowski
Source :
Applied Physics Letters. 104:261107
Publication Year :
2014
Publisher :
AIP Publishing, 2014.

Abstract

Spectrally resolved and kinetic response of electroluminescence was monitored from resistively heated carbon nanotube (CNT) macroassemblies. Sensitive detection system and custom-made setup for high-speed optoelectronic measurements were employed to investigate unsorted and single chirality-enriched CNTs. By increasing the content of (7,6) or (6,5) CNTs in a sample, the E11 emission peak in the infrared region became more narrow (∼150 nm), hence approaching that of commercial emitters for this spectral range. Moreover, electroluminescence initiation in CNTs occurred very rapidly and reached its full intensity within tens of milliseconds. Interestingly, observed delay between bias voltage application and electroluminescence proved triplet-triplet annihilation in the macroscopic assembly of CNTs.

Details

ISSN :
10773118 and 00036951
Volume :
104
Database :
OpenAIRE
Journal :
Applied Physics Letters
Accession number :
edsair.doi...........3601efd51d973834f2fd668ac19fd4fa
Full Text :
https://doi.org/10.1063/1.4886800