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首页> 外文期刊>Advanced Functional Materials >Enhanced Light Harvesting in Mesoscopic Solar Cells by Multilevel Multiscale Patterned Photoelectrodes with Superpositioned Optical Properties
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Enhanced Light Harvesting in Mesoscopic Solar Cells by Multilevel Multiscale Patterned Photoelectrodes with Superpositioned Optical Properties

机译：具有叠加光学特性的多层多尺度图案化光电电极在介观太阳能电池中增强的光收集

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摘要

Investigations on nano-and micropatterns have been intensively performed in optical applications due to their light modulation effects for enhanced photon utilization. Recently, incorporation of periodic architectures in solar cells have brought significant enhancements in light harvesting and energy conversion efficiency, however, further improvements in performance are required for practical applications due to the intrinsic limitations of single-level patterns. Herein, this study reports mesoscopic solar cells employing photoelectrodes with multilevel multiscale patterns. Polydimethylsiloxane film with multilevel nano/micropatterns (integrated in z-axis direction) is prepared by LEGO-like multiplex lithography, and its architecture is imprinted on mesoporous TiO2 electrode by soft molding technique. By various spectral analyses and simulations, advanced light harvesting properties by superposition of optical responses from constituent nano-and micropatterns are verified. The effectiveness of the strategy is confirmed by applications in dye-sensitized solar cells as a model system, wherein over 17.5% increase in efficiency (by multilevel 400 nm line/20 mu m dot structures) is observed. Also, external quantum efficiencies clearly exhibit that the improved light harvesting originates from the combined effects of diffraction grating and random scattering induced by both nano-and microarchitectures, respectively. Moreover, the validity of the multiscale approach in different dimensions is also confirmed in order to demonstrate the general advantages.
机译：由于其光调制效应以增强光子利用，因此在光学应用中已对纳米和微图案进行了深入研究。近来，在太阳能电池中并入周期性架构已带来光收集和能量转换效率的显着提高，但是，由于单级图案的固有局限性，实际应用中需要进一步提高性能。在此，本研究报道了采用具有多级多尺度图案的光电极的介观太阳能电池。通过类LEGO多重光刻法制备具有多级纳米/微图案（沿z轴方向集成）的聚二甲基硅氧烷膜，并通过软模压技术将其结构压印在介孔TiO2电极上。通过各种光谱分析和模拟，通过叠加来自组成的纳米和微图案的光学响应，验证了先进的光收集特性。通过在染料敏化太阳能电池中作为模型系统的应用，证实了该策略的有效性，其中观察到效率提高了17.5％以上（通过多级400 nm线/ 20μm点结构）。同样，外部量子效率清楚地表明，改进的光收集来自于分别由纳米和微体系结构引起的衍射光栅和随机散射的组合效应。此外，还证实了多尺度方法在不同维度上的有效性，以证明其总体优势。

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  • 来源
    《Advanced Functional Materials》 |2016年第36期|6584-6592|共9页
  • 作者

    Jang Segeun; Kang Jin Soo; Lee Jong-Kwon; Kim Sang Moon; Son Yoon Jun; Lim Ahyoun; Cho Hyesung; Kim Jin; Jeong Juwon; Lee Gunhee; Sung Yung-Eun; Choi Mansoo;

  • 作者单位

    Seoul Natl Univ, Dept Mech & Aerosp Engn, Global Frontier Ctr Multiscale Energy Syst, Seoul 151744, South Korea|Inst for Basic Sci Korea, Ctr Nanoparticle Res, Seoul 151742, South Korea;

    Seoul Natl Univ, Sch Chem & Biol Engn, Seoul 151742, South Korea;

    Seoul Natl Univ, Dept Mech & Aerosp Engn, Global Frontier Ctr Multiscale Energy Syst, Seoul 151744, South Korea;

    Incheon Natl Univ, Dept Mech Engn, Inchon 406772, South Korea;

    Inst for Basic Sci Korea, Ctr Nanoparticle Res, Seoul 151742, South Korea|Seoul Natl Univ, Sch Chem & Biol Engn, Seoul 151742, South Korea;

    Inst for Basic Sci Korea, Ctr Nanoparticle Res, Seoul 151742, South Korea|Seoul Natl Univ, Sch Chem & Biol Engn, Seoul 151742, South Korea;

    Univ Penn, Dept Mat Sci & Engn, 3231 Walnut St, Philadelphia, PA 19104 USA;

    Inst for Basic Sci Korea, Ctr Nanoparticle Res, Seoul 151742, South Korea|Seoul Natl Univ, Sch Chem & Biol Engn, Seoul 151742, South Korea;

    Inst for Basic Sci Korea, Ctr Nanoparticle Res, Seoul 151742, South Korea|Seoul Natl Univ, Sch Chem & Biol Engn, Seoul 151742, South Korea;

    Seoul Natl Univ, Dept Mech & Aerosp Engn, Global Frontier Ctr Multiscale Energy Syst, Seoul 151744, South Korea;

    Inst for Basic Sci Korea, Ctr Nanoparticle Res, Seoul 151742, South Korea|Seoul Natl Univ, Sch Chem & Biol Engn, Seoul 151742, South Korea;

    Seoul Natl Univ, Dept Mech & Aerosp Engn, Global Frontier Ctr Multiscale Energy Syst, Seoul 151744, South Korea;

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