Nanostructured dielectric layer - A new approach to design nanostructured solar cells

Nanostructures have been widely used in solar cells due to their extraordinary optical management properties. However, due to the poor junction quality and large surface recombination velocity, typical nanostructured solar cells are not efficient. Here we demonstrate a new approach to design and fabricate whole-wafer nanostructures on dielectric layer for solar cell application. The design, simulation, fabrication and characterization of nanostructured dielectric layer silicon solar cells are presented. The optical simulation results illustrate that the periodic nanostructure array on dielectric materials suppresses the reflection and enhances the absorption over a wide spectral range. Reflection measurements show that reflection can be suppressed below 10% for a wide range of solar spectrum and incident angle. The current density-voltage (J-V) characterization shows that the short circuit current is improved by 44%. Our results suggest this nanostructured dielectric layer has the potential to significantly improve solar cell performance and avoid typical problems of defects and surface recombination for nanostructured solar cells, thus providing a new pathway towards realizing high-efficiency and low-cost solar cells.

[1]  Christopher B. Murray,et al.  Langmuir-Blodgett Manipulation of Size-Selected CdSe Nanocrystallites , 1994 .

[2]  W. Warta,et al.  Solar cell efficiency tables (Version 45) , 2015 .

[3]  Hao-Chih Yuan,et al.  An 18.2%-efficient black-silicon solar cell achieved through control of carrier recombination in nanostructures. , 2012, Nature nanotechnology.

[4]  Armin G. Aberle,et al.  Surface passivation of crystalline silicon solar cells: a review , 2000 .

[5]  Dong Liang,et al.  GaAs thin film nanostructure arrays for III-V solar cell applications , 2012, Other Conferences.

[6]  Yi Cui,et al.  Design and growth of III–V nanowire solar cell arrays on low cost substrates , 2010, 2010 35th IEEE Photovoltaic Specialists Conference.

[7]  Yangsen Kang,et al.  High-efficiency nanostructured window GaAs solar cells. , 2013, Nano letters.

[8]  W. Warta,et al.  Solar cell efficiency tables (version 43) , 2014 .

[9]  Zongfu Yu,et al.  Optical absorption enhancement in amorphous silicon nanowire and nanocone arrays. , 2009, Nano letters.

[10]  Peidong Yang,et al.  Light trapping in silicon nanowire solar cells. , 2010, Nano letters.

[11]  J. Lefebvre,et al.  Selective epitaxy of semiconductor nanopyramids for nanophotonics , 2010, Nanotechnology.

[12]  Bozhi Tian,et al.  Coaxial Group Iii#nitride Nanowire Photovoltaics , 2009 .

[13]  Yangsen Kang,et al.  Design and fabrication of nano-pyramid GaAs solar cell , 2013, 2013 IEEE 39th Photovoltaic Specialists Conference (PVSC).

[14]  Zongfu Yu,et al.  Optical Absorption Enhancement in Freestanding GaAs Thin Film Nanopyramid Arrays , 2012 .

[15]  Mark Kerr,et al.  Surface passivation of silicon solar cells using plasma-enhanced chemical-vapour-deposited SiN films and thin thermal SiO2/plasma SiN stacks , 2001 .

[16]  John A. Rogers,et al.  Light Trapping in Ultrathin Monocrystalline Silicon Solar Cells , 2013 .

[17]  Zongfu Yu,et al.  Nanodome solar cells with efficient light management and self-cleaning. , 2010, Nano letters.

[18]  Yi Cui,et al.  All-back-contact ultra-thin silicon nanocone solar cells with 13.7% power conversion efficiency , 2013, Nature Communications.

[19]  Yi Cui,et al.  Wafer-scale silicon nanopillars and nanocones by Langmuir-Blodgett assembly and etching , 2008 .