10.1021/jz501237m.s001
Fabian
C. Hanusch
Fabian
C.
Hanusch
Erwin Wiesenmayer
Erwin
Wiesenmayer
Eric Mankel
Eric
Mankel
Andreas Binek
Andreas
Binek
Philipp Angloher
Philipp
Angloher
Christina Fraunhofer
Christina
Fraunhofer
Nadja Giesbrecht
Nadja
Giesbrecht
Johann M. Feckl
Johann M.
Feckl
Wolfram Jaegermann
Wolfram
Jaegermann
Dirk Johrendt
Dirk
Johrendt
Thomas Bein
Thomas
Bein
Pablo Docampo
Pablo
Docampo
Efficient
Planar Heterojunction Perovskite Solar Cells
Based on Formamidinium Lead Bromide
American Chemical Society
2015
cell absorber materials
Efficient Planar Heterojunction Perovskite Solar Cells
photoexcited species
methylammonium counterpart
material exhibits
BromideThe development
bromide perovskite absorbers
sintered mesoporous TiO 2 photoanode
diffusion lengths
bandgap absorber
bandgap alkylammonium
power conversion efficiencies
2015-12-17 03:56:35
Journal contribution
https://acs.figshare.com/articles/journal_contribution/Efficient_Planar_Heterojunction_Perovskite_Solar_Cells_Based_on_Formamidinium_Lead_Bromide/2038383
The
development of medium-bandgap solar cell absorber materials
is of interest for the design of devices such as tandem solar cells
and building-integrated photovoltaics. The recently developed perovskite
solar cells can be suitable candidates for these applications. At
present, wide bandgap alkylammonium lead bromide perovskite absorbers
require a high-temperature sintered mesoporous TiO<sub>2</sub> photoanode
in order to function efficiently, which makes them unsuitable for
some of the above applications. Here, we present for the first time
highly efficient wide bandgap planar heterojunction solar cells based
on the structurally related formamidinium lead bromide. We show that
this material exhibits much longer diffusion lengths of the photoexcited
species than its methylammonium counterpart. This results in planar
heterojunction solar cells exhibiting power conversion efficiencies
approaching 7%. Hence, formamidinium lead bromide is a strong candidate
as a wide bandgap absorber in perovskite solar cells.