Under indoor lighting conditions, perovskite solar cells (PSCs) demonstrate significantly higher efficiency compared to traditional crystalline silicon solar cells (c-Si SCs).
Efficiency Comparison:
- A recent development in Taiwan achieved an indoor power conversion efficiency of 42% for PSCs under 3,000 K LED illumination at 1,000 lux, utilizing self-assembled monolayers to improve carrier transport and defect passivation at key interfaces.
- Another study reported PSCs reaching about 36% efficiency under 1,000 lux of cool-white LED light by optimizing perovskite solvent ratios.
- In contrast, crystalline silicon solar cells typically exhibit much lower efficiency indoors. A 12-month monitoring study found that PSCs generated about 148.8 mWh/cm² annual energy yield indoors, which is roughly three times higher than the 46.0 mWh/cm² yield from c-Si SCs under the same conditions.
Reasons for Superior Indoor Performance of Perovskite Cells:
- The spectral response of perovskite solar cells closely matches the emission spectrum of typical indoor LED lighting, enhancing their energy conversion efficiency under these conditions.
- Improvements in defect passivation and interface engineering, such as using self-assembled monolayers, further optimize the charge transport in PSCs under low-intensity indoor light.
- PSCs tend to maintain a better open-circuit voltage and fill factor under indoor lighting compared to traditional silicon cells, partly due to their material properties that are well-suited for low-irradiance environments.
Summary Table:
| Feature | Perovskite Solar Cells (PSCs) | Crystalline Silicon Solar Cells (c-Si SCs) |
|---|---|---|
| Indoor Efficiency (@ ~1000 lux) | Up to ~42% (LED lighting) | Much lower; roughly one-third the energy yield |
| Annual indoor energy yield | ~148.8 mWh/cm² | ~46.0 mWh/cm² |
| Spectral matching | Good match to LED spectra | Less optimal spectral response for indoor LEDs |
| Interface engineering | Advanced defect passivation improves charge transport | Conventional silicon interfaces |
| Stability under indoor light | Retains most performance over extended periods | Generally stable but lower efficiency |
Thus, perovskite solar cells currently outperform traditional silicon solar cells by a significant margin under indoor lighting, making PSCs more promising for powering IoT devices and other low-power indoor electronics.
Original article by NenPower, If reposted, please credit the source: https://nenpower.com/blog/how-does-the-efficiency-of-perovskite-solar-cells-compare-to-traditional-solar-cells-under-indoor-lighting-conditions/
