Lithography-free wide-angle antireflective self-cleaning silicon nanocones.

Low-cost, wideband, and wide-angle antireflective layers are of prime importance to photovoltaic and other optoelectronic applications. We report a novel fabrication methodology of random textured silicon nanocones (SiNCs) array through metal-assisted chemical etching combined with oxidation. The optical properties of the fabricated structure are studied theoretically and experimentally. The random textured SiNCs array showed very promising broadband antireflective properties through the entire visible wavelength range at different incident angles up to ±60°. In addition, the nanostructures inherently could become self-cleaning due to the high contact angle. This random cheap textured SiNCs array increases the absorption efficiency of photodetectors and reduces its cost.

[1]  Mohamed A. Swillam,et al.  Vertically aligned crystalline silicon nanowires with controlled diameters for energy conversion applications: Experimental and theoretical insights , 2014 .

[2]  Fei Wang,et al.  Periodic silicon nanocones arrays with controllable dimensions prepared by two-step etching using nanosphere lithography and NH4OH/H2O2 solution , 2010, 2010 Photonics Global Conference.

[3]  Nam-Gyu Park,et al.  Water-repellent perovskite solar cell , 2014 .

[4]  Wenshan Cai,et al.  Erratum: Plasmonics for extreme light concentration and manipulation , 2010 .

[5]  Maesoon Im,et al.  Self-cleaning effect of highly water-repellent microshell structures for solar cell applications , 2011 .

[6]  C. Pan,et al.  Improved broadband and quasi-omnidirectional anti-reflection properties with biomimetic silicon nanostructures. , 2007, Nature nanotechnology.

[7]  Ning Han,et al.  Developing controllable anisotropic wet etching to achieve silicon nanorods, nanopencils and nanocones for efficient photon trapping , 2013 .

[8]  Ullrich Steiner,et al.  Self-cleaning antireflective optical coatings. , 2013, Nano letters.

[9]  Zhipeng Huang,et al.  Metal-assisted chemical etching of silicon and nanotechnology applications , 2014 .

[10]  Xinhao Wang,et al.  Liquid refractive index sensing independent of opacity using an optofluidic diffraction sensor. , 2014, Optics letters.

[11]  Yi Chen,et al.  One step lithography-less silicon nanomanufacturing for low cost high-efficiency solar cell production , 2014, Photonics West - Micro and Nano Fabricated Electromechanical and Optical Components.

[12]  Gang Chen,et al.  Analysis of optical absorption in silicon nanowire arrays for photovoltaic applications. , 2007, Nano letters.

[13]  Zhida Xu,et al.  Lithography-free sub-100 nm nanocone array antireflection layer for low-cost silicon solar cell. , 2012, Applied optics.

[14]  Xinjian Feng,et al.  Design and Creation of Superwetting/Antiwetting Surfaces , 2006 .

[15]  P. Spinelli,et al.  Broadband omnidirectional antireflection coating based on subwavelength surface Mie resonators , 2012, Nature Communications.

[16]  M. K. Dawood,et al.  Interference lithographically defined and catalytically etched, large-area silicon nanocones from nanowires , 2010, Nanotechnology.

[17]  Ralph G Nuzzo,et al.  Black silicon solar thin-film microcells integrating top nanocone structures for broadband and omnidirectional light-trapping , 2014, Nanotechnology.

[18]  Weifeng Zhang,et al.  A highly efficient flexible dye-sensitized solar cell based on nickel sulfide/platinum/titanium counter electrode , 2015, Nanoscale Research Letters.

[19]  Zhipeng Huang,et al.  Metal‐Assisted Chemical Etching of Silicon: A Review , 2011, Advanced materials.

[20]  Guillaume Gomard,et al.  The role of random nanostructures for the omnidirectional anti-reflection properties of the glasswing butterfly , 2015, Nature Communications.

[21]  Zhiyong Fan,et al.  Efficient photon capturing with ordered three-dimensional nanowell arrays. , 2012, Nano letters.

[22]  Z. Y. Wang,et al.  Broadband optical absorption by tunable Mie resonances in silicon nanocone arrays , 2015, Scientific Reports.

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

[24]  E. Mazur,et al.  MICROSTRUCTURING OF SILICON WITH FEMTOSECOND LASER PULSES , 1998 .

[25]  Wilhelm Barthlott,et al.  Characterization and Distribution of Water-repellent, Self-cleaning Plant Surfaces , 1997 .