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Electrically reduced graphene oxide for photovoltaic application

机译：用于光伏应用的电还原氧化石墨烯

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摘要

We report Electrically reduced graphene oxide (GO) and n-type Si heterostructure junction-based photovoltaic cell. The transition of the insulating properties of GO to that of semi-conducting was achieved by applying electric voltages using 5, 10, and 15 V biasing. The photovoltaic device I-V characteristics corresponding to the increasing (5-15 V) reduction voltages, obtained on exposure of 25 mW/cm(2) visible light, showed approximately same fill factor with increased efficiency. The maximum efficiency of 1.12% was observed under ultraviolet light exposure for photovoltaic cell consisting GO reduced using 15 V reduction voltage. GO was synthesized using the modified Hummers' technique and characterized by X-ray diffraction (XRD), ultraviolet-visible (UV-Vis) spectroscopy, Fourier transform infrared (FTIR) spectroscopy, and scanning electron microscopy (SEM). The GO characteristic XRD peak corresponding to plane (001) was observed at 9.16 degrees. The UV-Vis spectrum for GO displayed an absorption peak at 228.5 nm, and the corresponding Tauc plot analysis provided a band gap of 4.74 eV. The FTIR analysis showed presence of C=O (1713 cm(-1)), C=C (1627 cm(-1)), C-OH (1418 cm(-1)), C-O-C (1252 cm(-1)), C-O (1030 cm(-1)), and C-H (827 cm(-1)) functional groups in GO.
机译：我们报告电还原氧化石墨烯（GO）和n型硅异质结结型光伏电池。通过使用5、10和15 V偏压施加电压，可以实现GO绝缘特性向半导体特性的转变。在25 mW / cm（2）可见光的曝光下获得的与增加的（5-15 V）降低电压相对应的光伏设备I-V特性显示出效率几乎相同的填充系数。对于用15 V还原电压还原GO的光伏电池，在紫外线照射下观察到的最大效率为1.12％。 GO采用改进的Hummers技术合成，并通过X射线衍射（XRD），紫外可见（UV-Vis）光谱，傅里叶变换红外（FTIR）光谱和扫描电子显微镜（SEM）进行表征。在9.16度观察到对应于平面（001）的GO特征XRD峰。 GO的UV-Vis光谱在228.5 nm处显示吸收峰，相应的Tauc图分析提供了4.74 eV的带隙。 FTIR分析显示存在C = O（1713 cm（-1）），C = C（1627 cm（-1）），C-OH（1418 cm（-1）），COC（1252 cm（-1） ），GO中的CO（1030 cm（-1））和CH（827 cm（-1））官能团。

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  • 来源
    《Journal of Materials Research》 |2019年第4期|652-660|共9页
  • 作者

    Singh Arun; Sharma Neeraj; Arif Mohd; Katiyar Ram S.;

  • 作者单位

    Jamia Millia Islamia, Dept Phys, Adv Elect & Nanomat Lab, New Delhi 110025, India;

    Jamia Millia Islamia, Dept Phys, Adv Elect & Nanomat Lab, New Delhi 110025, India;

    Jamia Millia Islamia, Dept Phys, Adv Elect & Nanomat Lab, New Delhi 110025, India;

    Univ Puerto Rico, Dept Phys, SPECLAB, San Juan, PR 90036 USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    graphene oxide; voltage reduction; photovoltaic cell; XRD; SEM; UV-vis;

    机译：氧化石墨烯;降压;光伏电池;XRD;SEM;UV-vis;

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