Solar cell efficiency improvement using dip-pen nanolithography

Abstract. An innovative approach to improve the performance of photovoltaic solar cells is presented. Until recently, the fabrication of grating layers has been well proven using bulk micromachining techniques, but lately low-cost dip-pen nanolithography (DPN) has been proposed as a method for printing nanostructures on different substrates and has matured to become one of the most versatile patterning techniques available at the nanoscale. However, this technique has scarcely been studied and tested for fabricating grating layers. In this research, submicron grating patterns from high refractive index polymers are fabricated on a few types of solar cells, significantly improving their efficiency. The appropriate geometries and materials for the grating patterns are obtained via numerical optimization using rigorous coupled wave analysis for electromagnetic simulations of the grating multilayer. Possible light-confinement schemes are analyzed, and their figures of merit are assessed. The simulation of the electrical characteristics is integrated with postdesign electromagnetic simulation. The corresponding theoretical and experimental studies shed light on the impact of the merger of the grating structure with the light harvester on the device’s optical and electrical properties. Success in using DPN paves pathways to low-cost fabrication of light harvesting devices with improved performance.

[1]  Shlomo Hava,et al.  Ultrathin high efficiency photodetectors based on subwavelength grating and near-field enhanced absorption. , 2015, Nanoscale.

[2]  Investigation of geometrical effects of antireflective subwavelength grating structures for optical device applications , 2009 .

[3]  F. Krebs.  Fabrication and processing of polymer solar cells: A review of printing and coating techniques , 2009 .

[4]  J. Owrutsky,et al.  Mie resonance-enhanced light absorption in periodic silicon nanopillar arrays. , 2013, Optics express.

[5]  L. J. Giling,et al.  Anisotropic Etching of Crystalline Silicon in Alkaline Solutions , 2005 .

[6]  A. Polman,et al.  Light Trapping in Thin Crystalline Si Solar Cells Using Surface Mie Scatterers , 2014, IEEE Journal of Photovoltaics.

[7]  Heon Lee,et al.  Enhanced performance of solar cells with anti-reflection layer fabricated by nano-imprint lithography , 2011 .

[8]  R. Morf,et al.  Submicrometer gratings for solar energy applications. , 1995, Applied optics.

[9]  From spin coating to roll-to-roll: investigating the challenge of upscaling lead halide perovskite solar cells , 2017 .

[10]  W. Warta,et al.  Solar cell efficiency tables (version 50) , 2017 .

[11]  L. Chi,et al.  Nanoscaled surface patterning of conducting polymers. , 2011, Small.

[12]  L. Faraone,et al.  Novel resonant cavity-enhanced absorber structures for high-efficiency midinfrared photodetector application , 2011 .

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

[14]  Helmut Stiebig,et al.  Optical properties of thin‐film silicon solar cells with grating couplers , 2006 .

[15]  Insect Eyes Inspire Improved Solar Cells , 2011 .

[16]  D. Bykhovsky,et al.  PDMS Deposition for Optical Devices by Dip-Pen Nanolithography , 2017 .

[17]  B. Clymer.  Surface-relief grating structures for efficient high bandwidth integrated photodetectors for optical interconnections in silicon VLSI. , 1989, Applied optics.

[18]  M. O. Manasreh,et al.  Broadband Nanostructured Antireflection Coating for Enhancing GaAs Solar Cell Performance , 2016, IEEE Journal of Photovoltaics.

[19]  Andrew Blakers,et al.  A review of thin-film crystalline silicon for solar cell applications. Part 2: Foreign substrates , 2001 .

[20]  Shanhui Fan,et al.  Light management for photovoltaics using high-index nanostructures. , 2014, Nature materials.

[21]  S. Azmayesh-Fard,et al.  Design and fabrication of a planar PDMS transmission grating microspectrometer. , 2013, Optics express.

[22]  Tsutomu Miyasaka,et al.  Organometal halide perovskites as visible-light sensitizers for photovoltaic cells. , 2009, Journal of the American Chemical Society.

[23]  R. Baets,et al.  Grating Couplers for Coupling between Optical Fibers and Nanophotonic Waveguides , 2006 .

[24]  A. Maldonado,et al.  Characteristics of SnO 2 :F Thin Films Deposited by Ultrasonic Spray Pyrolysis: Effect of Water Content in Solution and Substrate Temperature , 2012 .

[25]  P. Fath,et al.  Two- and three-dimensional optical carrier generation determination in crystalline silicon solar cells , 1998 .

[26]  Rajan P. Kulkarni,et al.  Dip-pen nanolithography of reactive alkoxysilanes on glass. , 2003, Journal of the American Chemical Society.

[27]  T. Emrick,et al.  Nanoparticle Stripes, Grids, and Ribbons Produced by Flow Coating , 2010, Advanced materials.

[28]  K. Gylfason,et al.  An apodized SOI waveguide-to-fiber surface grating coupler for single lithography silicon photonics. , 2011, Optics express.

[29]  H. Atwater,et al.  Omnidirectional and broadband absorption enhancement from trapezoidal Mie resonators in semiconductor metasurfaces , 2015, Scientific Reports.

[30]  S. Islam,et al.  Conversion Efficiency Improvement in GaAs Solar Cells , 2014 .

[31]  K. A. Brown,et al.  Material transport in dip-pen nanolithography , 2014 .

[32]  X. Deng,et al.  High-efficiency and highly stable a-Si:H solar cells deposited at high rate (8 Å/s) with disilane grading process , 2011 .

[33]  Joseph Murray,et al.  Nanophotonic resonators for InP solar cells. , 2016, Optics express.

[34]  L. Andreani,et al.  Response to “Comment on ‘Towards high efficiency thin-film crystalline silicon solar cells: The roles of light trapping and non-radiative recombinations’” [J. Appl. Phys. 117, 026101 (2015)] , 2015 .

[35]  Shlomo Hava,et al.  Design and analysis of low-reflection grating microstructures for a solar energy absorber , 2000 .

[36]  Kerry J Vahala,et al.  Replica-molded high-Q polymer microresonators. , 2004, Optics letters.

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

[38]  Steven G. Johnson,et al.  Optimization-based design of surface textures for thin-film Si solar cells — Are conventional Lambertian models relevant? , 2011, 2011 37th IEEE Photovoltaic Specialists Conference.

[39]  Arvind Shah,et al.  Thin-film silicon solar cells: A review and selected trends , 1995 .

[40]  G. Wallace,et al.  Ink-on-probe hydrodynamics in atomic force microscope deposition of liquid inks. , 2014, Small.

[41]  I. Tobías,et al.  The role of rear surface in thin silicon solar cells , 2005 .

[42]  K. Catchpole,et al.  Nanophotonic light trapping in solar cells , 2012 .

[43]  M. Auslender,et al.  Silicon grating-based mirror for 1.3-µm polarized beams: MATLAB-aided design. , 1995, Applied optics.

[44]  X. Tao,et al.  Polymer nanostructures made by scanning probe lithography: recent progress in material applications. , 2012, Macromolecular rapid communications.

[45]  J. Rogers,et al.  Performance of ultrathin silicon solar microcells with nanostructures of relief formed by soft imprint lithography for broad band absorption enhancement. , 2010, Nano letters.

[46]  Lucio Claudio Andreani,et al.  Towards high efficiency thin-film crystalline silicon solar cells: The roles of light trapping and non-radiative recombinations , 2014 .

[47]  U. Khankhoje.  Photon confinement in photonic crystal cavities , 2010 .

[49]  M. Stutzmann,et al.  Periodic light coupler gratings in amorphous thin film solar cells , 2001 .

[50]  M. Green,et al.  22.8% efficient silicon solar cell , 1989 .

[51]  Xiaofeng Li,et al.  Scattering effect of the high-index dielectric nanospheres for high performance hydrogenated amorphous silicon thin-film solar cells , 2016, Scientific Reports.

[52]  S. Bhattacharya,et al.  Multilayer porous silicon diffraction gratings operating in the infrared , 2012, Nanoscale Research Letters.

[53]  Ping Sheng,et al.  Wavelength-selective absorption enhancement in thin-film solar cells , 1983 .

[54]  L. Faraone,et al.  New resonant cavity-enhanced absorber structures for mid-infrared detector applications , 2012, 1204.0226.

[55]  A. Heuberger,et al.  Anisotropic Etching of Crystalline Silicon in Alkaline Solutions I . Orientation Dependence and Behavior of Passivation Layers , 1990 .

[56]  K. Faulds,et al.  Rapid prototyping of poly(dimethoxysiloxane) dot arrays by dip-pen nanolithography , 2011 .