Theoretical insights into multibandgap hybrid perovskites for photovoltaic applicationsReport as inadecuate

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1 FOTON - Fonctions Optiques pour les Technologies de l-informatiON 2 ISCR - Institut des Sciences Chimiques de Rennes 3 ICN2 - ICN2 - Institut Catala de Nanociencia i Nanotecnologia

Abstract : This paper reviews some of the recent theoretical investigations on the Rashba Dresselhaus spin effects and dielectric properties of CH 3 NH 3 PbI 3 hybrid perovskites and CsPbI 3 all-inorganic perovskites using Density functional theory. The spin vectors rotate in the non-centrosymmetric P4mm tetragonal phase, respectively clockwise and counterclockwise, in a manner that is characteristic of a pure Rashba effect. The high frequency dielectric constants ε ∞ of MAPbI 3 and CsPbI 3 are similar as anticipated, since large differences are only expected at very low frequency where additional contributions from molecular reorientations show off for the hybrid compounds. A first simulation of a perovskite on silicon tandem cell, including a tunnel junction, is also investigated. Effect of halogen substitution I-Br is inspected, revealing limitations for short-circuit current and open-circuit voltage electrical characteristics.

Keywords : hybrid perovskite solar cell rashba tandem silicon dielectric

Author: Jacky Even - Daniel Sapori - Laurent Pedesseau - Alain Rolland - Mikael Kepenekian - Roberto Robles - Shijian Wang - Yong Huang -



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