Enhanced Performance of Organic Thin Film Solar Cells Using Electrodes with Nanoimprinted Light-Diffraction and Light-Diffusion Structures

Chen, Jheng Yuan; Yu, Ming; Chang, Chih Yu; Chao, Yi Hsiang; Sun, Kien-Wen; Hsu, Chain‐Shu

doi:10.1021/am405865w

Cited by 22 publications

(13 citation statements)

References 30 publications

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“…Indeed, commercial UV-and T-NIL can be used. In this regard, 2D structures imprinted by UV-NIL on resists demonstrated increased light absorption [86][87][88] and device efficiency up to 42 % higher than flat devices [87].…”

Section: Organic Solar Cellsmentioning

confidence: 99%

Nanoimprint Lithography: Toward Functional Photonic Crystals

Lova

Soci

2015

Organic and Hybrid Photonic Crystals

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In this chapter we review the use of nanoimprint lithography and its derivative soft-lithography techniques for the fabrication of functional photonic crystals. Nanoimprint is a viable, scalable, and cost-effective solution for large area patterning. While initially it relied primarily on pattern transfer from a rigid mold to a thermally softened polymer by embossing, in the last two decades the process evolved rapidly, giving rise to new technologies that allow direct imprint of functional materials such as conjugated polymers, metals, biological matter, and metal oxides. These advancements generated increasing interest in the use of nanoimprint lithography for the fabrication of photonic structures for light management in optoelectronic devices. After describing standard nanoimprint lithography and its derivative soft-lithography methods, we briefly discuss nanoimprint capabilities and prospects in photonic applications. In particular we review recent implementations of imprinted photonic structures for light management in organic light emitting diodes, solar cells, solid state lasers and sensors.

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Section: Organic Solar Cellsmentioning

confidence: 99%

Nanoimprint Lithography: Toward Functional Photonic Crystals

Lova

Soci

2015

Organic and Hybrid Photonic Crystals

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“…Highly precise, ordered, and uniform surface patterns that cut across the micrometer and nanometer length scales offer a high degree of tunability for physical surface engineering. Surface properties such as wettability, friction/adhesion, and optical effects are some of the most frequently encountered properties in applications ranging from biomedical products (sensors, diagnostic devices) to optoelectronic devices and consumer products . Highly deterministic surface textures that lead to highly tunable surface properties offer a promising surface engineering approach for multiple reasons: 1) preserves the native chemical structure of the materials, 2) minimizes the use of chemical, thus offering a more sustainable approach for surface engineering, 3) multiple surface properties can be achieved through surface texturing, and 4) in nanometer scale surface texture, optical transparency of the material can be preserved.…”

Section: Introductionmentioning

confidence: 99%

Nanostructured Free‐Form Objects via a Synergy of 3D Printing and Thermal Nanoimprinting

Lee

Low

2018

Global Challenges

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High‐resolution surface patterning has garnered interests as a nonchemical‐based surface engineering approach for creating functional surfaces. Applications in consumer products, parts for transportation vehicles, optics, and biomedical technologies demand topographic patterning on 3D net shape objects. Through a hybrid approach, high‐resolution surface texture is incorporated onto 3D‐printed polymers via direct thermal nanoimprinting process. The synergy of geometry design freedom in 3D printing and the high spatial resolution in nanoimprinting is demonstrated to be a versatile fabrication of high‐fidelity surface pattern (from 2 µm to 200 nm resolution) on convex, concave semicylindrical, and hemispherical objects spanning a range of surface curvatures. The novel hybrid fabrication is further extended to achieve a high‐resolution curved mold insert for rapid prototyping via injection molding. The versatility of the fabrication strategies reported here not only provides a post‐3D printing process that enhances the surface properties of 3D‐printed objects but also opens a new pathway to enable future study on the effects of combining microscale and nanoscale surface texture with macroscopic curvature. Both have been known, individually, as an effective approach to tune surface functionalities.

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“…This millimeterscale textured surface also deteriorates further transparency due to easy deposition of dust particles. It is noteworthy here that the nanoscale architectures are promising to reduce light‐reflection with an enormous enlargement of the light‐active surface area by light‐trapping and absorbing the maximum radiation of sunlight in solar cells . Therefore, fabrication of a nanoscale textured coating on any low iron borosilicate glass with sufficient transparency, hardness, and hydrophobicity could fulfill all the requirements of an effective solar cover glass useful for multiple solar functions.…”

Section: Introductionmentioning

confidence: 99%

Zeolite Crystals Embedded Nanotextured Coating with Hydrophobic Surface: An Innovation Toward Next Generation Solar Cover Glass for Efficient Light‐Harvesting

Das

2016

Adv Materials Inter

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the cover glasses. Therefore, the second generation was referred to the glasses with antirefl ective (AR) coatings. However, the normal AR coatings based on optical interference design (by controlling thickness and refractive index) are thin, possess low hardness, and fail to transmit sunlight with high percentage in the wide region of wavelength (400-2000 nm). [ 7,8,11 ] Furthermore, due to the comparatively smooth surface of conventional AR coating, the less favorable fl at angle radiations of sunlight cannot be captured as well as solar module suffers from the effi ciency loss by the overheating during constant exposure under sun. As an alternative to these AR coatings, millimeterscale textured cover glasses came into the market and being used at present as the third generation cover glass. Keeping in view the specifi c requirements of the optical performances, the structure of those millimeterscale textured cover glasses were found to be different with the variation of geometrical architecture of the patterns such as abrupt-shaped triangular form, smoothed-shaped sinusoidal form, grooves, direct pyramids, and inverse pyramids. [ 12,13 ] Except reduction of refl ection loss at the glass-air interface by light-trapping, [ 12,14 ] the third generation cover glasses have additional advantages of antidazzle and positive temperature effects. But fabrication of such textured cover glasses in large scale is time consuming, expensive, complicated process and needs a completely methodical controlled engineering or software based program. [ 13 ] Further, due to the extensive light scattering from such highly textured surface, this glass suffers from very poor visual transparency [ 15,16 ] to the normal human eyes which limits their additional outdoor applications. This millimeterscale textured surface also deteriorates further transparency due to easy deposition of dust particles. It is noteworthy here that the nanoscale architectures are promising to reduce light-refl ection with an enormous enlargement of the light-active surface area by lighttrapping and absorbing the maximum radiation of sunlight in solar cells. [1][2][3][4][5][6][17][18][19][20][21][22][23][24][25][26][27] Therefore, fabrication of a nanoscale textured coating on any low iron borosilicate glass with suffi cient transparency, hardness, and hydrophobicity could fulfi ll all the requirements of an effective solar cover glass useful for multiple solar functions. Moreover, it is expected that such nanoscale surface structure on the glass with increased surface area will allow a large area for heat exchange to keep the temperature of A zeolite crystals embedded nanotextured hard coating with hydrophobic surface is fabricated on low iron borosilicate glass to enhance the effi ciency of photovoltaic systems through advance light-trapping. The surface roughness generated from embedding 3D nanocrystals enhances absorption of sunlight by reducing refl ection loss, and capturing maximum incident light to construct higher electricity and passive solar gain. Fur...

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Enhanced Performance of Organic Thin Film Solar Cells Using Electrodes with Nanoimprinted Light-Diffraction and Light-Diffusion Structures

Cited by 22 publications

References 30 publications

Nanoimprint Lithography: Toward Functional Photonic Crystals

Nanoimprint Lithography: Toward Functional Photonic Crystals

Nanostructured Free‐Form Objects via a Synergy of 3D Printing and Thermal Nanoimprinting

Zeolite Crystals Embedded Nanotextured Coating with Hydrophobic Surface: An Innovation Toward Next Generation Solar Cover Glass for Efficient Light‐Harvesting

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