Investigation of temperature and illumination dependencies of carrier-induced degradation in p-type multi-crystalline silicon

Shaoyang Liu*, Catherine Chan, Daniel Chen, Moonyong Kim, Chandany Sen, Utkarshaa Varshney, Brett Hallam, Malcolm Abbott, Stuart Wenham, David Payne

*Corresponding author for this work

Research output: Contribution to journalConference paperpeer-review

10 Citations (Scopus)


Carrier-induced degradation (CID) in multi-crystalline silicon (mc-Si) solar cells, often also referred to as Light- and elevated Temperature-Induced Degradation (LeTID), significantly affects the performance of mc-Si PERC cells when they are subjected to light or carrier injection. However, the root cause for this degradation has not yet been determined. Previous work has demonstrated that an increase in illumination and temperature can accelerate the defect formation and enable rapid recovery, with variations in degradation and regeneration rates suggesting that competing reactions are likely involved. In this work, we provide further insight into the kinetics of the carrier lifetime evolution of mc-Si wafers using an accelerated high intensity laser technique. The illumination and temperature range investigated is between 14.6 kW/m2 to 74.5 kW/m2 and 100°C to 300°C respectively. The resulting degradation (Rdeg) and regeneration (Rreg) rate constants show that both illumination and temperature can substantially alter the reaction rates. For temperatures higher than 250°C, samples do not show any degradation in lifetime regardless of the illumination intensity applied to the wafer. The activation energies for degradation and regeneration have also been extracted by applying an Arrhenius plot for different illumination intensities.

Original languageEnglish
Article number130014
Pages (from-to)1-8
Number of pages8
JournalAIP Conference Proceedings
Issue number1
Publication statusPublished - 10 Aug 2018
Externally publishedYes
EventSiliconPV 2018: The 8th International Conference on Crystalline Silicon Photovoltaics - Lausanne, Switzerland
Duration: 19 Mar 201821 Mar 2018

Bibliographical note

Monograph title: "SiliconPV 2018: the 8th International Conference on Crystalline Silicon Photovoltaics". Editor: Christophe Ballif, Rolf Brendel, Stefan Glunz, Giso Hahn, Jef Poortmans, Pierre-Jean Ribeyron and Arthur Weeber, ISBN: 9780735417151.


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