標題: Aperiodic and randomized dielectric mirrors: alternatives to metallic back reflectors for solar cells
作者: Lin, Albert
Zhong, Yan-Kai
Fu, Sze-Ming
Tseng, Chi Wei
Yan, Sheng Lun
電子工程學系及電子研究所
Department of Electronics Engineering and Institute of Electronics
公開日期: 5-五月-2014
摘要: Dielectric mirrors have recently emerged for solar cells due to the advantages of lower cost, lower temperature processing, higher throughput, and zero plasmonic absorption as compared to conventional metallic counterparts. Nonetheless, in the past, efforts for incorporating dielectric mirrors into photovoltaics were not successful due to limited bandwidth and insufficient light scattering that prevented their wide usage. In this work, it is shown that the key for ultra-broadband dielectric mirrors is aperiodicity, or randomization. In addition, it has been proven that dielectric mirrors can be widely applicable to thin-film and thick wafer-based solar cells to provide for light trapping comparable to conventional metallic back reflectors at their respective optimal geometries. Finally, the near-field angular emission plot of Poynting vectors is conducted, and it further confirms the superior light-scattering property of dielectric mirrors, especially for diffuse medium reflectors, despite the absence of surface plasmon excitation. The preliminary experimental results also confirm the high feasibility of dielectric mirrors for photovoltaics. (C)2014 Optical Society of America
URI: http://dx.doi.org/10.1364/OE.22.00A880
http://hdl.handle.net/11536/24432
ISSN: 1094-4087
DOI: 10.1364/OE.22.00A880
期刊: OPTICS EXPRESS
Volume: 22
Issue: 9
起始頁: A880
結束頁: A894
顯示於類別:期刊論文


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  1. 000335905300029.pdf