Metal nanocluster light-emitting devices with suppressed parasitic emission and improved efficiency: Exploring the impact of photophysical properties

T. W. Koh, A. M. Hiszpanski, M. Sezen, A. Naim, T. Galfsky, A. Trivedi, Y. L. Loo, V. Menon, B. P. Rand

Research output: Contribution to journalArticle

21 Scopus citations

Abstract

Here we investigate the photophysical properties of Au(0)@Au(i)-thiolate nanoclusters by controlling the degree of aggregation, and measure electrochemical energy levels to design a metal nanocluster-based thin film LED (MNC-LED) structure. These efforts allow us to implement MNC-LEDs with luminance exceeding 40 cd m-2 and external quantum efficiency exceeding 0.1% with clearly visible orange emission. It is also demonstrated that by varying the sizes of nanoclusters, the electroluminescence spectrum of the device can be tuned to the infrared emission, indicating the possibility of exploiting metal nanocluster emitters for use over a wide spectral range.

Original languageEnglish (US)
Pages (from-to)9140-9146
Number of pages7
JournalNanoscale
Volume7
Issue number20
DOIs
StatePublished - May 28 2015

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

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