Journal
NANO LETTERS
Volume 11, Issue 7, Pages 2927-2932Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl2013983
Keywords
Colloidal quantum dots; organic small molecules; charge transport; electroluminescence
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Funding
- National Science Foundation
- U.S. Department of Energy, Office of Basic Energy Sciences [DE-SC0001088]
- National Science Foundation [DMR-08-19762]
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [819762] Funding Source: National Science Foundation
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The high degree of morphological and energetic disorder inherent to many nanosized materials places limitations on charge injection into and transport rates through thin films of these materials. We demonstrate electroluminescence achieved by local generation of charge that eliminates the need for injection of charge carriers from the device electrodes. We show electroluminescence from thin films of nanoscale materials that do not support direct current excitation and suggest a mechanism for the charge generation and electroluminescence that is consistent with our time-averaged and time-resolved observations.
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