• DOI:10.1063/1.4922375
• Corpus ID: 109438804

Bifacial Si heterojunction-perovskite organic-inorganic tandem to produce highly efficient ( ηT* ∼ 33%) solar cell

@article{Asadpour2015BifacialSH,
  title={Bifacial Si heterojunction-perovskite organic-inorganic tandem to produce highly efficient ( $\eta$T* ∼ 33\%) solar cell},
  author={Reza Asadpour and Raghu Vamsi Krishna Chavali and M. Ryyan Khan and Muhammad A. Alam},
  journal={Applied Physics Letters},
  year={2015},
  volume={106},
  pages={243902}
}

• R. Asadpour, R. Chavali, +1 author Muhammad A. Alam
• Published 15 May 2015
• Chemistry
• Applied Physics Letters

As single junction photovoltaic (PV) technologies, both Si heterojunction (HIT) and perovskite based solar cells promise high efficiencies at low cost. Intuitively, a traditional tandem cell design with these cells connected in series is expected to improve the efficiency further. Using a self-consistent numerical modeling of optical and transport characteristics, however, we find that a traditional series connected tandem design suffers from low JSC due to band-gap mismatch and current matching constraints. Specifically, a traditional tandem cell with state-of-the-art HIT ( η=24%) and perovskite ( η=20%) sub-cells provides only a modest tandem efficiency of ηT∼ 25%. Instead, we demonstrate that a bifacial HIT/perovskite tandem design decouples the optoelectronic constraints and provides an innovative path for extraordinary efficiencies. In the bifacial configuration, the same state-of-the-art sub-cells achieve a normalized output of ηT* = 33%, exceeding the bifacial HIT performance at practical albedo re...