Computational design of high performance hybrid perovskite on silicon 2-T tandem solar cells based on a tunnel junction

Alain Rolland^a, L. Pédesseau^a, Y. Huang^a, S. Wang^a, D. Sapori^a, C. Cornet^a, O. Durand^a, J. Even^a, M. Kepenekian^b, C. Katan^b

^aFonctions Optiques pour les Technologies de l’Information (FOTON), Institut National des Sciences Appliquées (INSA) de Rennes, CNRS, UMR 6082, Rennes, France

^bInstitut des Sciences Chimiques de Rennes, CNRS, Université de Rennes 1, Ecole Nationale Supérieure de Chimie de Rennes, INSA Rennes, Rennes, France

NIPHO
Proceedings of International Conference on Perovskite Thin Film Photovoltaics, Photonics and Optoelectronics (ABXPV18PEROPTO)

Perovskite Thin Film Photovoltaics (ABXPV18). 27-28 Feb

Rennes, France, 2018 February 27th - March 1st

Organizer: Jacky Even

Poster, Alain Rolland, 047
Publication date: 11th December 2017

The optoelectronic properties of a monolithically integrated series-connected tandem solar cell are simulated using a drift-diffusion model. Following the large success of hybrid organic-inorganic perovskites for photovoltaics, which have recently demonstrated large efficiencies with low production costs1,2, we examine the possibility of using the same perovskites as absorbers in a tandem solar cell. The cell consists in a methyl ammonium mixed bromide-iodide lead perovskite, CH3NH3PbI3(1-x)Br3x (0 ≤ x ≤ 1), top sub-cell and a single-crystalline silicon bottom sub-cell. A Si-based tunnel junction connects the two sub-cells. Numerical simulations are based on a one-dimensional numerical drift-diffusion model3. It is shown that a top cell absorbing material with 20% of bromide and a thickness in the 300-400 nm range affords current matching with the silicon bottom cell. Good interconnection between single cells is ensured by standard n and p doping of the silicon at 5.1019cm-3 in the tunnel junction. A maximum efficiency of about 27% is predicted for the tandem cell exceeding both the efficiencies of stand-alone silicon and perovskite cells taken for our simulations, which amount to 17.3% and 17.9%, respectively.

Key words: Tandem solar cells, perovskites, tunnel junctions, numerical simulation, Photonics on silicon

[1]   M. Liu, M.B. Johnston, H.J. Snaith, Nature 501 (2013) 395–398.
[2]   H.J. Snaith, J. Phys. Chem. Lett. 4 (2013) 3623–3630.
Appl. Phys. Lett. 106 (2015) 121105.
[3]   A. Rolland, L. Pedesseau, J. Even, S. Almosni, C. Robert, C. Cornet, et al., Quantum Electron. 46 (2014) 1397–1403.

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