journal article·2018-05-01Open access

Improving performance of Si/CdS micro-/nanoribbon p-n heterojunction light emitting diodes by trenched structure

Shiyuan Huang, Yuanpeng Wu, Xiangyang Ma, Zongyin Yang, Xu Liu, Qing Yang

AIP Advances· Volume 8· Issue 5

Abstract

Realizing high performance silicon based light sources has been an unremitting pursuit for researchers. In this letter, we propose a simple structure to enhance electroluminescence emission and reduce the threshold of injected current of silicon/CdS micro-/nanoribbon p-n heterojunction visible light emitting diodes, by fabricating trenched structure on silicon substrate to mount CdS micro-/nanoribbon. A series of experiments and simulation analysis favors the rationality and validity of our mounting design. After mounting the CdS micro-/nanoribbon, the optical field confinement increases, and absorption and losses from high refractive silicon substrate are effectively reduced. Meanwhile the sharp change of silicon substrate near heterojunction also facilitates the balance between electron current and hole current, which substantially conduces to the stable amplification of electroluminescence emission in CdS micro-/nanoribbon.
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Research context

OpenAlex topics: Nanowire Synthesis and Applications · Quantum Dots Synthesis And Properties · Silicon Nanostructures and Photoluminescence

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

State Key Laboratory of Modern Optical Instrumentation, College of Optical Science and Engineering, Zhejiang University 1 , Hangzhou 310027, China

Department of Electrical Engineering and Computer Science, University of Michigan 2 , 1301 Beal Avenue, Ann Arbor, Michigan 48109-2122, USA

State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University 3 , Hangzhou 310027, China

Cambridge Graphene Centre, University of Cambridge 4 , Cambridge CB3 0FA, UK

Collaborative Innovation Center of Extreme Optics, Shanxi University 5 , Taiyuan 030006, China

Funding

First-class Universities and Academic Programs · the Cao Guangbiao Advanced Technology Program · the Program for Zhejiang Leading Team of S&T Innovation · Zhejiang Provincial Natural Science of China · National Natural Science Foundation of China

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