Device pre-conditioning and steady-state temperature dependence of CH3NH3PbI3 perovskite solar cells

Ricky B. Dunbar, Walied Moustafa, Alexander R. Pascoe, Timothy W. Jones, Kenrick F. Anderson, Yi-Bing Cheng, Christopher J. Fell, Gregory J. Wilson

Research output: Contribution to journalArticleResearchpeer-review

6 Citations (Scopus)

Abstract

The recent rise in power conversion efficiencies reported for perovskite solar cells has been a remarkable development in photovoltaics research. It is now pressing that the technology transitions from a research phenomenon to a real-world deployable device: this will require both robust methods for efficiency measurement, and accurate models for performance variation at different conditions. However, the generally slow response of perovskite solar cells to changes in voltage bias and irradiance, and the susceptibility of these cells to degradation, presents significant challenges. In this paper, we investigate current and voltage stabilisation of planar CH3NH3PbI3 perovskite solar cells and observe remarkably large variations in stabilisation time depending on exposure history. To address this, we demonstrate a dynamic approach that continues device pre-conditioning until pre-determined stability criteria are met. This approach is then employed to obtain measurements of short-circuit current and open-circuit voltage temperature coefficients under quasi-steady-state conditions for perovskite devices and a control monocrystalline silicon cell. The obtained open-circuit voltage temperature coefficient for the perovskite is −2700 ppm/°C, which interestingly, is similar to typically reported values for crystalline silicon devices. It is shown that the implemented approach can successfully differentiate between transient responses to the onset of illumination and true temperature related changes. We also find new manifestations of the complex transient processes that occur in perovskite devices. These observations highlight the importance of sophisticated characterisation approaches for correct characterisation of the performance of perovskite solar cells.

Original languageEnglish
Pages (from-to)533-544
Number of pages12
JournalProgress in Photovoltaics: Research and Applications
Volume25
Issue number7
DOIs
Publication statusPublished - 1 Jul 2017

Keywords

  • certification
  • metastability
  • photovoltaics
  • pre-conditioning
  • temperature dependence

Cite this

Dunbar, R. B., Moustafa, W., Pascoe, A. R., Jones, T. W., Anderson, K. F., Cheng, Y-B., ... Wilson, G. J. (2017). Device pre-conditioning and steady-state temperature dependence of CH3NH3PbI3 perovskite solar cells. Progress in Photovoltaics: Research and Applications, 25(7), 533-544. https://doi.org/10.1002/pip.2839
Dunbar, Ricky B. ; Moustafa, Walied ; Pascoe, Alexander R. ; Jones, Timothy W. ; Anderson, Kenrick F. ; Cheng, Yi-Bing ; Fell, Christopher J. ; Wilson, Gregory J. / Device pre-conditioning and steady-state temperature dependence of CH3NH3PbI3 perovskite solar cells. In: Progress in Photovoltaics: Research and Applications. 2017 ; Vol. 25, No. 7. pp. 533-544.
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Dunbar, RB, Moustafa, W, Pascoe, AR, Jones, TW, Anderson, KF, Cheng, Y-B, Fell, CJ & Wilson, GJ 2017, 'Device pre-conditioning and steady-state temperature dependence of CH3NH3PbI3 perovskite solar cells', Progress in Photovoltaics: Research and Applications, vol. 25, no. 7, pp. 533-544. https://doi.org/10.1002/pip.2839

Device pre-conditioning and steady-state temperature dependence of CH3NH3PbI3 perovskite solar cells. / Dunbar, Ricky B.; Moustafa, Walied; Pascoe, Alexander R.; Jones, Timothy W.; Anderson, Kenrick F.; Cheng, Yi-Bing; Fell, Christopher J.; Wilson, Gregory J.

In: Progress in Photovoltaics: Research and Applications, Vol. 25, No. 7, 01.07.2017, p. 533-544.

Research output: Contribution to journalArticleResearchpeer-review

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T1 - Device pre-conditioning and steady-state temperature dependence of CH3NH3PbI3 perovskite solar cells

AU - Dunbar, Ricky B.

AU - Moustafa, Walied

AU - Pascoe, Alexander R.

AU - Jones, Timothy W.

AU - Anderson, Kenrick F.

AU - Cheng, Yi-Bing

AU - Fell, Christopher J.

AU - Wilson, Gregory J.

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AB - The recent rise in power conversion efficiencies reported for perovskite solar cells has been a remarkable development in photovoltaics research. It is now pressing that the technology transitions from a research phenomenon to a real-world deployable device: this will require both robust methods for efficiency measurement, and accurate models for performance variation at different conditions. However, the generally slow response of perovskite solar cells to changes in voltage bias and irradiance, and the susceptibility of these cells to degradation, presents significant challenges. In this paper, we investigate current and voltage stabilisation of planar CH3NH3PbI3 perovskite solar cells and observe remarkably large variations in stabilisation time depending on exposure history. To address this, we demonstrate a dynamic approach that continues device pre-conditioning until pre-determined stability criteria are met. This approach is then employed to obtain measurements of short-circuit current and open-circuit voltage temperature coefficients under quasi-steady-state conditions for perovskite devices and a control monocrystalline silicon cell. The obtained open-circuit voltage temperature coefficient for the perovskite is −2700 ppm/°C, which interestingly, is similar to typically reported values for crystalline silicon devices. It is shown that the implemented approach can successfully differentiate between transient responses to the onset of illumination and true temperature related changes. We also find new manifestations of the complex transient processes that occur in perovskite devices. These observations highlight the importance of sophisticated characterisation approaches for correct characterisation of the performance of perovskite solar cells.

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KW - metastability

KW - photovoltaics

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KW - temperature dependence

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