On 10 September Žygimantas Vosylius successfully defended his PhD thesis “Characterization and Mitigation of Mismatch Effects in Solar Cell Testing Using Advanced LED-based Solar Simulators”. Supervisor – Prof. Dr Vincas Tamošiūnas.
Each year, hundreds of gigawatts of new solar power capacity are installed worldwide. One of the key challenges facing the solar cell and module industry is ensuring highly accurate characterisation of solar cell properties. These measurements must be carried out continuously in laboratory settings, even in the absence of stable natural sunlight. To achieve this, so-called solar simulators are developed using available artificial light sources.
This dissertation presents the development and evaluation of advanced LED-based and hybrid solar simulators that meet at least AAA-class requirements, while minimising the number of light source types used. It explores the effects of spectral mismatch across various types of solar cells and proposes strategies to mitigate these effects. The proposed mitigation approach, validated through comprehensive simulations involving different c-Si cell configurations, offers valuable insights for a complete and efficient transition to LED-based solar simulators, in line with evolving industry standards.
Wishing Žygimantas continued inspiration and success in his professional journey, and celebrating his contribution to innovation through this remarkable achievement.