TY - JOUR
T1 - Vapour-Deposited Cesium Lead Iodide Perovskites
T2 - Microsecond Charge Carrier Lifetimes and Enhanced Photovoltaic Performance
AU - Hutter, Eline
AU - Sutton, Rebecca J.
AU - Chandrashekar, Sanjana
AU - Abdi-Jalebi, Mojtaba
AU - Stranks, Samuel D.
AU - Snaith, Henry J.
AU - Savenije, Tom
PY - 2017
Y1 - 2017
N2 - Metal halide perovskites such as methylammonium lead iodide (MAPbI3) are highly promising materials for photovoltaics. However, the relationship between the organic nature of the cation and the optoelectronic quality remains debated. In this work, we investigate the optoelectronic properties of fully inorganic vapour-deposited and spin-coated black-phase CsPbI3 thin films. Using the time-resolved microwave conductivity technique, we measure charge carrier mobilities up to 25 cm2/(V s) and impressively long charge carrier lifetimes exceeding 10 μs for vapour-deposited CsPbI3, while the carrier lifetime reaches less than 0.2 μs in the spin-coated samples. Finally, we show that these improved lifetimes result in enhanced device performance with power conversion efficiencies close to 9%. Altogether, these results suggest that the charge carrier mobility and recombination lifetime are mainly dictated by the inorganic framework rather than the organic nature of the cation
AB - Metal halide perovskites such as methylammonium lead iodide (MAPbI3) are highly promising materials for photovoltaics. However, the relationship between the organic nature of the cation and the optoelectronic quality remains debated. In this work, we investigate the optoelectronic properties of fully inorganic vapour-deposited and spin-coated black-phase CsPbI3 thin films. Using the time-resolved microwave conductivity technique, we measure charge carrier mobilities up to 25 cm2/(V s) and impressively long charge carrier lifetimes exceeding 10 μs for vapour-deposited CsPbI3, while the carrier lifetime reaches less than 0.2 μs in the spin-coated samples. Finally, we show that these improved lifetimes result in enhanced device performance with power conversion efficiencies close to 9%. Altogether, these results suggest that the charge carrier mobility and recombination lifetime are mainly dictated by the inorganic framework rather than the organic nature of the cation
UR - http://resolver.tudelft.nl/uuid:2082aa11-e92f-47cb-acfe-45d7077f1efc
U2 - 10.1021/acsenergylett.7b00591
DO - 10.1021/acsenergylett.7b00591
M3 - Article
SN - 2380-8195
VL - 2
SP - 1901
EP - 1908
JO - ACS Energy Letters
JF - ACS Energy Letters
IS - 8
ER -
