TY - JOUR
T1 - Minimizing the Trade-Off between Photocurrent and Photovoltage in Triple-Cation Mixed-Halide Perovskite Solar Cells
AU - Baumeler, Thomas
AU - Arora, Neha
AU - Hinderhofer, Alexander
AU - Akin, Seckin
AU - Greco, Alessandro
AU - Abdi-Jalebi, Mojtaba
AU - Shivanna, Ravichandran
AU - Uchida, Ryusuke
AU - Liu, Yuhang
AU - Schreiber, Frank
AU - Zakeeruddin, Shaik M.
AU - Friend, Richard H.
AU - Graetzel, Michael
AU - Dar, M. Ibrahim
N1 - Publisher Copyright:
©
PY - 2020/12/3
Y1 - 2020/12/3
N2 - Its lower bandgap makes formamidinium lead iodide (FAPbI3) a more suitable candidate for single-junction solar cells than pure methylammonium lead iodide (MAPbI3). However, its structural and thermodynamic stability is improved by introducing a significant amount of MA and bromide, both of which increase the bandgap and amplify trade-off between the photocurrent and photovoltage. Here, we simultaneously stabilized FAPbI3 into a cubic lattice and minimized the formation of photoinactive phases such as hexagonal FAPbI3 and PbI2 by introducing 5% MAPbBr3, as revealed by synchrotron X-ray scattering. We were able to stabilize the composition (FA0.95MA0.05Cs0.05)Pb(I0.95Br0.05)3, which exhibits a minimal trade-off between the photocurrent and photovoltage. This material shows low energetic disorder and improved charge-carrier dynamics as revealed by photothermal deflection spectroscopy (PDS) and transient absorption spectroscopy (TAS), respectively. This allowed the fabrication of operationally stable perovskite solar cells yielding reproducible efficiencies approaching 22%.
AB - Its lower bandgap makes formamidinium lead iodide (FAPbI3) a more suitable candidate for single-junction solar cells than pure methylammonium lead iodide (MAPbI3). However, its structural and thermodynamic stability is improved by introducing a significant amount of MA and bromide, both of which increase the bandgap and amplify trade-off between the photocurrent and photovoltage. Here, we simultaneously stabilized FAPbI3 into a cubic lattice and minimized the formation of photoinactive phases such as hexagonal FAPbI3 and PbI2 by introducing 5% MAPbBr3, as revealed by synchrotron X-ray scattering. We were able to stabilize the composition (FA0.95MA0.05Cs0.05)Pb(I0.95Br0.05)3, which exhibits a minimal trade-off between the photocurrent and photovoltage. This material shows low energetic disorder and improved charge-carrier dynamics as revealed by photothermal deflection spectroscopy (PDS) and transient absorption spectroscopy (TAS), respectively. This allowed the fabrication of operationally stable perovskite solar cells yielding reproducible efficiencies approaching 22%.
UR - https://www.scopus.com/pages/publications/85096584611
U2 - 10.1021/acs.jpclett.0c02791
DO - 10.1021/acs.jpclett.0c02791
M3 - 文章
C2 - 33205977
AN - SCOPUS:85096584611
SN - 1948-7185
VL - 11
SP - 10188
EP - 10195
JO - Journal of Physical Chemistry Letters
JF - Journal of Physical Chemistry Letters
IS - 23
ER -