Thin Film Solar Cells Based on n-type Polycrystalline CdTe Absorber

Vasilios Palekis, Imran Khan, Shamara Collins, Chih An Hsu, Sudhajit Misra, Michael A. Scarpulla, Yong Hang Zhang, Don Morel, Chris Ferekides

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The effect of Indium (In) doping on CdTe thin film solar cells was investigated. CdTe thin films were deposited using the elemental vapor transport (EVT) technique under various Cd/Te gas phase ratios and In vapor concentrations. TCO/Buffer/n-CdTe/p-ZnTe solar cells have been fabricated and characterized. Indium doping has been found to affect the device performance. Capacitance-voltage (C-V) measurements revealed that net n-type doping increased with In concentration during the EVT deposition. Spectral response (SR) measurements indicated an enhanced carrier collection at higher In concentrations. The open-circuit voltage (\text{V}-{mathbf {OC}}) and fill factor (FF) of the devices was found to increase with increased n-type doping and therefore builtin voltage. To-date n-type CdTe solar cells yielded devices with \text{V}-{mathbf {OC}} \quad = 730 mV, \text{J}-{mathbf {SC}} \quad = 20 mA/cm{mathbf {2}} {, \mathbf {FF}} =textbf 62 % and efficiency near 9 %.

Original languageEnglish (US)
Title of host publication2018 IEEE 7th World Conference on Photovoltaic Energy Conversion, WCPEC 2018 - A Joint Conference of 45th IEEE PVSC, 28th PVSEC and 34th EU PVSEC
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1937-1942
Number of pages6
ISBN (Electronic)9781538685297
DOIs
StatePublished - Nov 26 2018
Event7th IEEE World Conference on Photovoltaic Energy Conversion, WCPEC 2018 - Waikoloa Village, United States
Duration: Jun 10 2018Jun 15 2018

Publication series

Name2018 IEEE 7th World Conference on Photovoltaic Energy Conversion, WCPEC 2018 - A Joint Conference of 45th IEEE PVSC, 28th PVSEC and 34th EU PVSEC

Other

Other7th IEEE World Conference on Photovoltaic Energy Conversion, WCPEC 2018
CountryUnited States
CityWaikoloa Village
Period6/10/186/15/18

Keywords

  • Cadmium telluride
  • doping
  • indium
  • photovoltaic cells
  • zinc telluride

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Renewable Energy, Sustainability and the Environment
  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials

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  • Cite this

    Palekis, V., Khan, I., Collins, S., Hsu, C. A., Misra, S., Scarpulla, M. A., Zhang, Y. H., Morel, D., & Ferekides, C. (2018). Thin Film Solar Cells Based on n-type Polycrystalline CdTe Absorber. In 2018 IEEE 7th World Conference on Photovoltaic Energy Conversion, WCPEC 2018 - A Joint Conference of 45th IEEE PVSC, 28th PVSEC and 34th EU PVSEC (pp. 1937-1942). [8548249] (2018 IEEE 7th World Conference on Photovoltaic Energy Conversion, WCPEC 2018 - A Joint Conference of 45th IEEE PVSC, 28th PVSEC and 34th EU PVSEC). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/PVSC.2018.8548249