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Journal Article
Effects of an Undoped Si1_xCx Buffer Layer on Performance of Si Nanocrystal Light-Emitting Diodes
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- Authors
- Chul Huh, Kwan Sik Cho, Kyung-Hyun Kim, Jong Cheol Hong, Hyun Sung Ko, Wan Joong Kim, Gun Yong Sung
- Issue Date
- 2008-05
- Citation
- Electrochemical and Solid-State Letters, v.11, no.7, pp.H189-H192
- ISSN
- 1099-0062
- Publisher
- Electrochemical Society (ECS)
- Language
- English
- Type
- Journal Article
- Abstract
- We report the effects of introducing an undoped Si1-x Cx buffer layer between a silicon nanocrystal (nc-Si) active layer and an n-type SiC layer on the performance of the nc-Si light-emitting diodes (LEDs). The electrical property of an nc-Si LED with a buffer layer was greatly improved compared to that of an nc-Si LED without a buffer layer. Moreover, the light output power of the nc-Si LED with a buffer layer was enhanced by a factor of 2. By employing a buffer layer, the efficiency of electron injection into the nc-Si layer was enhanced, which resulted in an increase in the light output power. The data show that the introduction of an undoped Si1-x Cx buffer layer is a very effective way to improve the performance of nc-Si LEDs. © 2008 The Electrochemical Society.