Abstracts Book - IMRC 2018

• SWMC-P005
THE INFLUENCE OF MESOPOROUS BROOKITE ON THE
PERFORMANCE OF CARBON-BASED PEROVSKITE SOLAR CELLS
Renan Andres Escalante Quijano 1,2 , Dena Pourjafari 3 , Simone Meroni 2 , Trystan Watson 2 , Gerko
Oskam 3
1 CINVESTAV-Mérida, Applied physics, Mexico. 2 Swansea University, , United Kingdom, Channel
Islands & Isle of Man. 3 CINVESTAV-Mérida, , Mexico.
Solar cells have become a promising solution for the ever-increasing energy
demand, and research is focusing on fabrication of devices with higher
conversion efficiencies and lower cost per peak Watt. A promising technology is
the hybrid perovskite solar cell (PSC), of which the efficiency improved from 10
to 22 % in only six years. Spin-coated devices generally have the better
performance; nevertheless, the devices show fast degeneration under working
conditions at one sun. Triple-stack carbon-based PCS have shown better stability
and are fully printable using screen printing.
In this work, mesoporous brookite phase TiO 2 will be used instead of
mesoporous anatase phase TiO 2 ; and zirconia will be replaced with alumina.
These both layers need to remain under 1 micron thickness and carbon on top
must be close to seven microns. Fabricated devices have an active area of 1 cm 2
and were measured with 3 and 5 mm circular mask under one sun illumination.
To describe internal parameters such as the chemical capacitance, charge
transfer resistance, electron lifetime and electron diffusion length,
electrochemical impedance spectroscopy (EIS), intensity-modulated
photocurrent spectroscopy (IMPS) and intensity-modulated photovoltage
spectroscopy (IMVS) have been applied, and the results are compared.
Keywords: Mesoporous brookite, carbon based, perovskite solar cell
Presenting authors email: renan.escalante@cinvestav.mx