標題: High Efficiency Triple-Junction Solar Cells Employing Biomimetic Antireflective Structures
作者: Chiu, Meng-Yih
Chang, Chia-Hua
Chang, Feng-Yu
Yu, Peichen
光電工程學系
Department of Photonics
關鍵字: Subwavelength structures;Nanostructures;Photovoltaic
公開日期: 2011
摘要: In this work, we demonstrate a thorough device design, fabrication, characterization, and analysis of biomimetic antireflective structures implemented on a Ga(0.5)In(0.5)P/GaAs/Ge triple-junction solar cell. The sub-wavelength structures are fabricated on a silicon nitride passivation layer using polystyrene nanosphere lithography followed by anisotropic etching. The fabricated structures enhance optical transmission in the ultraviolet wavelength range, compared to a conventional single-layer antireflective coating (ARC). The transmission improvement contributes to the enhanced photocurrent, which is also verified by the external quantum efficiency characterization of fabricated solar cells. Under one-sun illumination, the short-circuit current of a cell with a biomimetic structures is enhanced by 24.1% and 2.2% due to much improved optical transmission and current matching, compared to cells without an ARC and with a conventional ARC, respectively. Further optimizations of the biomimetic structures including the periodicity and etching depth are conducted by performing comprehensive calculations based on a rigorous couple-wave analysis method.
URI: http://hdl.handle.net/11536/2685
http://dx.doi.org/10.1117/12.876850
ISBN: 978-0-8194-8470-3
ISSN: 0277-786X
DOI: 10.1117/12.876850
期刊: PHYSICS AND SIMULATION OF OPTOELECTRONIC DEVICES XIX
Volume: 7933
Appears in Collections:Conferences Paper


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