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Broadband light management in hydrogel glass for energy efficient windows

Frontiers of Optoelectronics 2022年第3期15卷 45-53页

作者： Jia Fu Chunzao Feng Yutian Liao Mingran Mao Huidong Liu Kang Liu MOE Key Laboratory of Hydraulic Machinery Transients School of Power and Mechanical EngineeringWuhan UniversityWuhan 430072China Wuhan National Laboratory for Optoelectronics Huazhong University of Science and TechnologyWuhan 430074China

Windows are critically important components in building envelopes that have a signifcant efect on the integral energy budget.For energy saving,here we propose a novel design of hydrogel-glass which consists of a layer of hydrogel and a layer of normal glass.Compared with traditional glass,the hydrogel-glass possesses a higher level of visible light transmission,stronger near-infrared light blocking,and higher mid-infrared thermal emittance.With these properties,hydrogel-glass based windows can enhance indoor illumination and reduce the temperature,reducing energy use for both lighting and cooling.Energy savings ranging from 2.37 to 10.45 MJ/m2 per year can be achieved for typical school buildings located in diferent cities around the world according to our simulations.With broadband light management covering the visible and thermal infrared regions of the spectrum,hydrogel-glass shows great potential for application in energy-saving windows.

关键词： Hydrogel light management Windows Energy saving Broadband

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Ion track-based nanowire arrays with gradient and programmable diameters towards rational light management

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Chinese Physics B 2021年第8期30卷 75-81页

作者：黄冉张家明徐芳芳刘杰姚会军陈永辉段敬来 Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000China School of Nuclear Science and Technology University of Chinese Academy of SciencesBeijing 100049China Advanced Energy Science and Technology Guangdong Laboratory Huizhou 516000China Huizhou Research Center of Ion Sciences Huizhou 516000China

Integrating nanowires with nonuniform diameter and random spatial distribution into an array can afford unconventional and additional means for modulating optical response.However,experimental realization of such a nanowire array is quite challenging.In this work,we propose a new fabrication strategy which takes advantage of ion track technology,via sequential swift heavy ion irradiation and ion track etching.Based on this strategy,we unprecedentedly realize nanowire arrays,using gold as an example,with gradient and programmable diameters in a controlled manner.We further demonstrate that such nanowire arrays can support broadband,tunable,and enhanced plasmonic responses.We believe that our new type of nanowire arrays will find great potential in applications such as light management and optoelectronic devices.

关键词： ion track technology nanowire plasmonics light management

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Surface passivation and light management towards efficient perovskite solar cells

Surface passivation and light management towards efficient p...

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第七届新型太阳能电池材料科学与技术学术研讨会

作者： Yi Ding Minna Hou Yan Wu Qian Huang Guofu Hou Ying Zhao Xiaodan Zhang Institute of Photoelectronic Thin Film Devices and Technology Nankai University

Surface passivation is increasingly one of the most prominent strategies to promote efficiency and stability of perovskite solar cells.However,most passivation molecule hinders carrier extraction due to poorly conductive aggregation between perovskite surface and carrier transportation layer.Herein,a novel molecule:p-phenyl dimethylammonium iodide(PDMAI) with ammonium group on both terminals is introduced,and its passivation effect is systematically investigated.It is found PDMAI can mitigate defects at the surface and promote carrier extraction from perovskite to hole transporting layer,leading to a lift of open-circuit voltage of 40 mV.Profiting from superior PDMAI passivation,the average efficiency of perovskite solar cells has been elevated from 19.69% to 20.99%.In addition,a simple and facile strategy has been proposed to promote the light harvest in refractive index mismatched PSCs.Effective light managing structures were carefully assembled on the substrate surface(light irradiation side) before device fabrication by employing SiO2 microspheres with different diameters.This strategy delivers prominent light harvest by reducing the light reflection in the short wavelength range and enhancing the light scattering in the long wavelength range.Consequently,the efficiency of inverted PSCs has been substantially improved from 17.24% to 19.12%,benefiting mainly from the enhanced short-circuit current.

关键词： Perovskite solar cells Surface passivation light management

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Photocurrent improvement of an ultra-thin silicon solar cell using the localized surface plasmonic effect of clustering nanoparticles

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Chinese Physics B 2020年第6期29卷 532-537页

作者： F Sobhani H Heidarzadeh H Bahador Department of Electrical and Computer Engineering University of Mohaghegh ArdabiliArdabilIran

The cluster-shaped plasmonic nanostructures are used to manage the incident light inside an ultra-thin silicon solar cell.Here we simulate spherical,conical,pyramidal,and cylindrical nanoparticles in a form of a cluster at the rear side of a thin silicon cell,using the finite difference time domain(FDTD)method.By calculating the optical absorption and hence the photocurrent,it is shown that the clustering of nanoparticles significantly improves them.The photocurrent enhancement is the result of the plasmonic effects of clustering the nanoparticles.For comparison,first a cell with a single nanoparticle at the rear side is evaluated.Then four smaller nanoparticles are put around it to make a cluster.The photocurrents of 20.478 mA/cm2,23.186 mA/cm2,21.427 mA/cm2,and 21.243 mA/cm2 are obtained for the cells using clustering conical,spherical,pyramidal,cylindrical NPs at the backside,respectively.These values are 13.987 mA/cm2,16.901 mA/cm2,16.507 mA/cm2,17.926 mA/cm2 for the cell with one conical,spherical,pyramidal,cylindrical NPs at the backside,respectively.Therefore,clustering can significantly improve the photocurrents.Finally,the distribution of the electric field and the generation rate for the proposed structures are calculated.

关键词： clustering nanoparticles plasmonic solar cell localized surface plasmon resonance photocurrent finite difference time domain(FDTD)method light management

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