Theoretical insights into multibandgap hybrid perovskites for photovoltaic applications

J. Even; L. Pedesseau; Claudine Katan

doi:10.1117/12.2052375

15 May 2014 Theoretical insights into multibandgap hybrid perovskites for photovoltaic applications

J. Even, L. Pedesseau, Claudine Katan

Proceedings Volume 9140, Photonics for Solar Energy Systems V; 91400Y (2014) https://doi.org/10.1117/12.2052375
Event: SPIE Photonics Europe, 2014, Brussels, Belgium

Abstract

Following pioneering works, the 3D hybrid lead-halide perovskites CH₃NH₃PbX₃ (X=Cl, Br, I) have recently been shown to drastically improve the efficiency of Dye Sensitized Solar Cells (DSSC). It is predicted to open “a new era and a new avenue of research and development for low-cost solar cells … likely to push the absolute power conversion efficiency toward that of CIGS (20%) and then toward and beyond that of crystalline silicon (25%)” (Snaith, H. J. Phys Chem. Lett. 4, 3623-3630 (2013).). Here, we investigate theoretically the crystalline phases of one of the hybrids relevant for photovoltaic applications, namely CH₃NH₃PbCl₃. Critical electronic states and optical absorption are thoroughly investigated both in the low and high temperature phases. Our findings reveal the dramatic effect of spin orbit coupling on their multiple band gaps. Their physical properties are compared to those of conventional semiconductors, evidencing inversion of band edge states.

Citation Download Citation

J. Even, L. Pedesseau, and Claudine Katan "Theoretical insights into multibandgap hybrid perovskites for photovoltaic applications", Proc. SPIE 9140, Photonics for Solar Energy Systems V, 91400Y (15 May 2014); https://doi.org/10.1117/12.2052375

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