Abstracts Book - IMRC 2018

• SC4-P063
SUPPRESSED HYSTERESIS AND ENHANCED CARRIER LIFETIMES
BY PHASE STABILIZATION YIELD HIGH VOLTAGES AND
EFFICIENCY IN PLANAR PEROVSKITE SOLAR CELLS
Silver Hamill Turrén Cruz 1,2 , Michael Saliba 2 , Matthew T. Mayer 2 , Hector Juárez Santiesteban 3 ,
Xavier Mathew 4 , Lea Lea Nienhaus 5 , Wolfgang Wolfgang Tress 2 , Moungi G. Bawendi 5 , Michael
Grätzel 2 , Antonio Abate 6 , Anders Hagfeldt 2 , Juan-Pablo Correa Baena 5
1 Benemerita Universidad Autonoma de Puebla, Instituto de ciencias, Mexico. 2 École
Polytechnique Fédérale de Lausanne, , Switzerland. 3 Benemerita Universidad Autonoma de
Puebla, , Mexico. 4 Instituto de EnergÍas Renovables Universidad Nacional Autónoma de
México, , Mexico. 5 Massachusetts Institute of Technology, , United States. 6 Helmholtz-Zentrum
Berlin für Materialien und Energie GmbH, Young Investigator Group Active Materials and
interfaces for stable perovskite solar cells, Germany.
Perovskite solar cells (PSCs) are very promising lab-scale technologies to deliver
inexpensive solar electricity. Low-temperature, planar PSCs are of particularly
interest for large-scale deployment due to their inherent suitability for flexible
substrates and potential for silicon/perovskite tandems. So far, planar PSCs
have been prone to large current-voltage hysteresis and low stabilized power
output due to a number of issues associated with this kind of device
configuration. We find that the suppression of the yellow-phase impurity (∂-
FAPbI3) present in formamidium-based perovskites, by RbI incorporation,
contributes to low hysteresis, long living carrier lifetimes and a champion
stabilized power output of 20.3% using SnOX as the electron selective contact.
We study in depth, the effects of these impurities on the transient behavior that
defines hysteresis and its relation to ionic movement. In addition, we find that
the formation of a RbPbI3 phase does not significantly affect the charge carrier
lifetimes and consequently the performance of the devices. This brings new
physical insights onto the role of different impurities in perovskite solar cells,
which make these materials so remarkable.
Keywords: Perovskite, Solar cells, Hysteresis
Presenting authors email: hamill_turren@hotmail.com