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首页> 外文期刊>Journal of Materials Research >Low temperature photoluminescence spectroscopy studies on sputter deposited CdS/CdTe junctions and solar cells
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Low temperature photoluminescence spectroscopy studies on sputter deposited CdS/CdTe junctions and solar cells

机译：溅射沉积CdS / CdTe结和太阳能电池的低温光致发光光谱研究

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摘要

Device quality CdS/CdTe heterostructures and completed solar cells (～12% efficient) have been studied using photoluminescence (PL) as a function of temperature and laser excitation power. The CdS/CdTe junctions were grown on transparent conducting oxide covered soda lime glass using radio frequency sputter deposition. In the current work we found that the PL spectra of sputtered and thermally evaporated CdTe absorber films share common features. It was found that the luminescence shifts from being dominated by sub-gap defect-mediated emission at lower excitation powers to near band edge excitonic emission at higher excitation powers. It was found that the presence of Cu suppresses the sub-band gap PL emissions. This effect was concluded to be due either to Cu occupying cadmium vacancies (V_(Cd)) or forming acceptor complexes with them. This points to a potential role of Cu in eliminating sub-band gap recombination routes and hence increasing the charge separation ability of the device.
机译：使用光致发光（PL）作为温度和激光激发功率的函数，研究了器件质量CdS / CdTe异质结构和完整的太阳能电池（约12％的效率）。使用射频溅射沉积法在透明导电氧化物覆盖的钠钙玻璃上生长CdS / CdTe结。在当前的工作中，我们发现溅射和热蒸发的CdTe吸收膜的PL光谱具有共同的特征。发现发光从在较低激发功率下由亚间隙缺陷介导的发射为主转变为在较高激发功率下的近带边缘激子发射。已经发现，Cu的存在抑制了子带隙PL发射。结论是，这种作用是由于Cu占据了镉空位（V_（Cd））或与它们形成受体络合物。这表明了铜在消除子带隙复合路径并因此增加器件的电荷分离能力方面的潜在作用。

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  • 来源
    《Journal of Materials Research》 |2016年第2期|186-194|共9页
  • 作者

    Mohit Tuteja; Prakash Koirala; Julio Soares; Robert Collins; Angus Rockett;

  • 作者单位

    Department of Materials Science and Engineering, University of Illinois, Urbana, Illinois 61801, USA;

    Department of Physics and Astronomy, University of Toledo, Toledo, Ohio 43606, USA;

    Frederick-Seitz Materials Research Laboratory, University of Illinois, Urbana, Illinois 61801, USA;

    Department of Physics and Astronomy, University of Toledo, Toledo, Ohio 43606, USA;

    Department of Materials Science and Engineering, University of Illinois, Urbana, Illinois 61801, 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);
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