Optical absorptions in ZnO/a-Si distributed Bragg reflectors
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- 作者：Aqing Chen ; Zhian Chen ; Kaigui Zhu ; Zhenguo Ji
- 关键词：Distributed Bragg reflectors ; Optical absorption ; Discrete optical absorption peaks ; Nanoleayers ; Thin film
- 刊名：Journal of Nanoparticle Research
- 出版年：2017
- 出版时间：January 2017
- 年：2017
- 卷：19
- 期：1
- 全文大小：
- 刊物类别：Chemistry and Materials Science
- 刊物主题：Nanotechnology; Inorganic Chemistry; Characterization and Evaluation of Materials; Physical Chemistry; Optics, Lasers, Photonics, Optical Devices;
- 出版者：Springer Netherlands
- ISSN：1572-896X
- 卷排序：19
文摘
The distributed Bragg reflectors (DBRs) consisting of alternating layers of ZnO and heavy doped amorphous silicon (a-Si) have been fabricated by magnetron sputtering. It is novel to find that the optical absorptions exist in the stopband of the DBRs, and that many discrete strong optical absorption peaks exist in the wavelength range of visible to near-infrared. The calculated results by FDTD show that the absorptions in the stopband mainly exist in the first a-Si layer, and that the light absorbed by other a-Si layers inside contributes to the two absorption peaks in near-infrared range. The strong absorptions ranged from visible to infrared open new possibilities to the enhancement of the performance of amorphous silicon solar cells.