Title :
Novel Indium-Tin-Oxide nano-whiskers for enhanced transmission of surface-textured silicon photovoltaic cells
Author :
Chang, C.H. ; Hsu, Min-Hsiang ; Yu, Peichen ; Kuo, H.C. ; Chang, W.L. ; Sun, W.C.
Author_Institution :
Dept. of Photonics, Nat. Chiao Tung Univ., Hsinchu, Taiwan
Abstract :
Conductive indium-tin-oxide (ITO) nano-whiskers were deposited on surface-textured Si solar cells using glancing-angle electron-beam deposition. With different deposited time, the ITO nano-structured layer exhibit tunable thickness, which can be related to the surface reflectance. The optimized nano-whisker surface demonstrates a broadband anti-reflective properties (R<5%), better than the traditional Si3N4 antireflection coating. Current-voltage and quantum efficiency analyses with the measured reflectivity data show enhanced optical transmission in the long wavelength range from 700nm to 1000nm, corresponding to a conversion efficiency improvement from 13.93% to 14.37%.
Keywords :
electron beam deposition; indium compounds; light transmission; silicon compounds; solar cells; surface texture; tin compounds; whiskers (crystal); ITO; Si3N4; broadband anti-reflective properties; conductive indium tin oxide; current-voltage analysis; enhanced optical transmission; glancing angle electron beam deposition; nanowhiskers; quantum efficiency analysis; surface textured silicon photovoltaic cells; wavelength 700 nm to 1000 nm; Coatings; Fabrication; Indium tin oxide; Nanostructured materials; Optical surface waves; Photovoltaic cells; Reflectivity; Silicon; Surface texture; Wavelength measurement;
Conference_Titel :
Photovoltaic Specialists Conference (PVSC), 2009 34th IEEE
Conference_Location :
Philadelphia, PA
Print_ISBN :
978-1-4244-2949-3
Electronic_ISBN :
0160-8371
DOI :
10.1109/PVSC.2009.5411626
