Browsing by Author "Chiu, Meng-Yih"

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High Efficiency Triple-Junction Solar Cells Employing Biomimetic Antireflective Structures
(2011)
Chiu, Meng-Yih
;
Chang, Chia-Hua
;
Chang, Feng-Yu
;
Yu, Peichen
;
光電工程學系
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.
Towards high-efficiency multi-junction solar cells with biologically inspired nanosurfaces
(2014-03-01)
Yu, Peichen
;
Chiu, Meng-Yih
;
Chang, Chia-Hua
;
Hong, Chung-Yu
;
Tsai, Yu-Lin