LMU Researchers Develop High‑Temperature‑Resistant Perovskite Solar Cell with 26 % Efficiency

A research team from Ludwig‑Maximilians‑University Munich (LMU) has developed a novel perovskite solar cell that combines high power conversion efficiency (around 26 %) with significantly improved thermal stability, addressing one of the key challenges limiting commercial deployment of perovskite photovoltaics. 

Perovskite solar cells have drawn global attention for their potential to achieve higher efficiencies at lower production costs compared with traditional silicon modules. However, their widespread adoption has been hampered by difficulties in maintaining performance under elevated temperatures and prolonged outdoor operation — conditions common in many solar installations. 

To overcome these limitations, the LMU team developed a dual molecular reinforcement strategy that strengthens the perovskite crystal structure and improves its resistance to heat‑induced degradation. The approach involves adding specialized molecular compounds during film formation to stabilize grain boundaries and enhance mechanical integrity. Early tests demonstrated that the cells maintain a substantial portion of their efficiency even when exposed to high temperatures for extended periods. 

Achieving about 26 % power conversion efficiency places the LMU device in a competitive range with advanced silicon and tandem solar cells, and suggests that next‑generation perovskite technology could play a significant role in future photovoltaic markets. While laboratory efficiencies for perovskites have surpassed 26 % in recent years, combining this level of performance with robust thermal resilience is a notable advancement that could help close the gap toward commercial viability. 

Scientists noted that enhanced thermal stability not only improves reliability but could also reduce system design constraints, as modules would be less prone to performance loss under heat stress. This improvement may lower long‑term generation costs and support broader use in hot climates and demanding outdoor environments.

Although further research and scaling efforts remain necessary, the LMU team’s breakthrough highlights a meaningful step toward overcoming longstanding barriers in perovskite photovoltaics. By strengthening the material’s endurance at high temperatures while maintaining excellent efficiency, the work advances the prospects for next‑generation solar cells in large‑scale renewable energy applications.