41.2% efficiency! Perovskite indoor photovoltaic

• Metal halide perovskites are ideal candidates for indoor photovoltaics (IPV) because of their easily tuned bandgap and can be engineered to cover the spectrum of any artificial light source. However, severe nonradiative carrier recombination under low light limits the application of perovskite-based IPVs (PIPVs).

• Zhao-Kui Wang from Soochow University and Michael Grätzel from the Federal Polytechnic Institute of Lausanne et al used aminonaphthalenesulfonate polar molecules to functionalize TiO2 substrates, anchoring CsPbI3 perovskite grains, molecular-level polar interlayers and ionic calcium There are strong ion-dipole interactions between titanium oxide films.

  
  

  The resulting high-quality CsPbI3 films exhibit defect immunity and large shunt resistance under low-light conditions, enabling the corresponding PIPV to have up to 41.2% indoor Photoelectric conversion efficiency (Pin: 334.11 μW/cm2, Pout: 137.66 μW/cm2). Furthermore, the efficiency of the device is 29.45% (Pout: 9.80 μW/cm2) and 32.54% (Pout: 54.34 μW/cm2) at 106 lux (Pin: 33.84 μW/cm2) and 522 lux (pin: 168.21 μW/cm2) cm2).

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• Wang, K.-L., Lu, H., Li, M., Chen, C.-H., Bo Zhang, D., Chen, J., Wu, J.-J., Zhou, Y.-H., Wang, X.-Q., Su, Z.-H., Shi, Y.-R., Tian, Q.-S., Ni, Y.-X., Gao, X.-Y., Zakeeruddin, S.M., Grätzel, M., Wang, Z.-K. and Liao, L.-S. (2023), Ion-Dipole Interaction Enabling Highly Efficient CsPbI3 Perovskite Indoor Photovoltaics. Adv. Mater.. Accepted Author Manuscript 2210106.

  https://doi.org/10.1002/adma.202210106
  

  https://onlinelibrary.wiley.com/doi/10.1002/adma.202210106