Photoassisted impedance spectroscopy for quantum dot solar cells

• Takuya Hoshii

• Shunya Naitoh

• Yoshitaka Okada

Abstract

In this study, the photoirradiation effect on the impedance of quantum dot solar cells (QDSCs) is evaluated. QDSCs under 1070 nm LED irradiation show current generation owing to the combination of photoexcitation and thermal escape via the QD state and exhibit an increase in conductance. On the other hand, 1550 nm LED irradiation increases the conductance of QDSCs with Si doping, although the current is not extracted. This result can be explained by the state filling of QDs by Si doping. Furthermore, the carrier generation efficiency is estimated, which implies that photoassisted impedance spectroscopy can potentially be used to evaluate intermediate-band solar cells.

Journal

• Japanese Journal of Applied Physics

  Japanese Journal of Applied Physics 55 (4S), 04ES11-, 2016-03-17

  IOP Publishing

Keywords

• General Physics and Astronomy
• General Engineering

Details

• CRID: 1360847874820621056
• NII Article ID: 210000146445
• DOI: 10.7567/jjap.55.04es11
• ISSN: 13474065
• ISSN: 00214922
• ISSN: http://id.crossref.org/issn/13474065
• Web Site: http://stacks.iop.org/1347-4065/55/i=4S/a=04ES11/pdf
• Web Site: http://stacks.iop.org/1347-4065/55/i=4S/a=04ES11?key=crossref.cb2a8bc3aaebd228adc56fd6972721a9
• Web Site: https://iopscience.iop.org/article/10.7567/JJAP.55.04ES11
• Web Site: https://iopscience.iop.org/article/10.7567/JJAP.55.04ES11/pdf
• Data Source:
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  • CiNii Articles
  • KAKEN