Full-color nanostructured thin-film electroluminescent device utilizing ZnS nanocrystals doped with activator-ions
✍ Scribed by Toyama, T. ;Adachi, D. ;Okamoto, H.
- Publisher
- John Wiley and Sons
- Year
- 2008
- Tongue
- English
- Weight
- 237 KB
- Volume
- 205
- Category
- Article
- ISSN
- 0031-8965
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✦ Synopsis
Abstract
We have studied nanostructured (NS‐) thin‐film electroluminescent (TFEL) devices utilizing the ZnS nanocrystals (NCs) with the mean crystal sizes of ca. 2–4 nm doped with activator‐ions. As compared to the conventional TFEL device, we have achieved a remarkable reduction in the operation voltages by >100 V~0–p~. Moreover, toward full‐color emissions, EL emissions of three primary colors, i.e., red, green, and blue have been derived from Mn^2+^, Tb^3+^, and Tm^3+^ ions, respectively. In this article, we review the studies on the fundamental properties of ZnS NCs as well as the device performance of the NS‐TFEL devices. We also discuss the excitation mechanisms of the activator‐ions in the ZnS NCs. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)