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Tandem PV Special Forum 2025


  • Yuseong District, Daejeon, 305-340 South Korea (map)

About Tandem PV Special Forum 2025

Tandem PV Special Forum 2025 is a joint event combining the 8th International Silicon Heterojunction Solar Cell Workshop and the 1st International Perovskite Silicon Tandem Solar Cell Workshop. Over three days, leading experts from industry, institutes and universities meet in Daejeon to discuss the latest results in silicon heterojunction (SHJ) and perovskite silicon tandem solar cells, including device physics, industrialisation and future technology roadmaps.

The forum takes place in Daejeon Convention Center, in the heart of Korea’s main R&D cluster, with a programme that combines plenary talks, technical sessions and networking events.

The forum takes place in Daejeon Convention Center, in the heart of Korea’s main R&D cluster, with a programme that combines plenary talks, technical sessions and networking events.

Fluxim at Tandem PV Special Forum 2025

Fluxim will be represented by Dr Simon Zeder, Computational Scientist at Fluxim AG. Simon will contribute to the discussion on how rigorous optoelectronic modelling helps understand and optimise next-generation perovskite and tandem devices. Meet Simon in Daejeon to talk about:

  • Numerical modelling of perovskite and tandem solar cells with Setfos, including luminescent coupling and optical–electrical interactions.

  • Using simulation to guide device design before costly process iterations.

  • How Fluxim tools integrate with experimental workflows for SHJ and perovskite silicon tandem cells.

If you work on tandem architectures, SHJ bottom cells or interface engineering, we are happy to discuss how simulation and measurement can support your projects.

Talk by Dr Simon Zeder

Title Rigorous optoelectronic modeling of luminescent coupling phenomena in perovskite solar cells

Speaker Dr Simon Zeder, Computational Scientist, Fluxim AG

Simon Zeder

Computational Scientist, Fluxim AG

Date and venue Tuesday 2 December 2025, 08:50-09:10am, Daejeon Convention Center, Korea

In this contribution, Simon will discuss how detailed optoelectronic modelling can be used to quantify luminescent coupling in perovskite solar cells and tandem stacks. The talk will show:

  • How emission, re-absorption and radiative coupling can be captured in rigorous optical and electrical models.

  • What luminescent coupling means for device performance, current matching and efficiency limits in perovskite silicon tandems.

  • How the modelling framework helps interpret experimental data and guides architecture choices for high-efficiency tandems.

The talk builds on Simon’s PhD work on modelling luminescence phenomena in perovskites and his ongoing role at Fluxim as a computational scientist.

About Dr Simon Zeder

Born and raised in Zurich, Switzerland, Simon Zeder studied Environmental Engineering (BSc) and Energy Science and Technology (MSc) at ETH Zurich. He first joined Fluxim for his master’s thesis on OLED excitonics modelling and then continued as a PhD student working on luminescence phenomena in perovskites in collaboration with Prof. Christophe Ballif’s group at EPFL PVLab.

After defending his PhD, Simon stayed at Fluxim as a Computational Scientist, focusing on advanced device models for perovskite and tandem solar cells and their implementation in Fluxim’s simulation tools.

Practical information

Meet Fluxim in Daejeon

If you are planning to attend Tandem PV Special Forum 2025 and would like to discuss perovskite and tandem modelling, please get in touch:

  • Use the contact form on this events page, or

  • Email us at info@fluxim.com and mention “Tandem PV Special Forum 2025” in the subject line.

We are happy to arrange a meeting with Simon during the forum.

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