TY - JOUR
T1 - Lead-free solid-state organic-inorganic halide perovskite solar cells
AU - Hao, Feng
AU - Stoumpos, Constantinos C.
AU - Cao, Duyen Hanh
AU - Chang, Robert P.H.
AU - Kanatzidis, Mercouri G.
N1 - Copyright:
Copyright 2014 Elsevier B.V., All rights reserved.
PY - 2014/6
Y1 - 2014/6
N2 - Lead-free solution-processed solid-state photovoltaic devices based on methylammonium tin iodide (CH 3 NH 3 SnI 3) perovskite semiconductor as the light harvester are reported. Featuring an optical bandgap of 1.3 eV, the CH 3 NH 3 SnI 3 perovskite material can be incorporated into devices with the organic hole-transport layer spiro-OMeTAD and show an absorption onset at 950 nm, which is significantly redshifted compared with the benchmark CH 3 NH 3 PbI 3 counterpart (1.55 eV). Bandgap engineering was implemented by chemical substitution in the form of CH 3 NH 3 SnI 3-x Br x solid solutions, which can be controllably tuned to cover much of the visible spectrum, thus enabling the realization of lead-free solar cells with an initial power conversion efficiency of 5.73% under simulated full sunlight. Further efficiency enhancements are expected following optimization and a better fundamental understanding of the internal electron dynamics and corresponding interfacial engineering. The reported CH 3 NH 3 SnI 3-x Br x perovskite solar cells represent a step towards the realization of low-cost, environmentally friendly solid-state solar cells.
AB - Lead-free solution-processed solid-state photovoltaic devices based on methylammonium tin iodide (CH 3 NH 3 SnI 3) perovskite semiconductor as the light harvester are reported. Featuring an optical bandgap of 1.3 eV, the CH 3 NH 3 SnI 3 perovskite material can be incorporated into devices with the organic hole-transport layer spiro-OMeTAD and show an absorption onset at 950 nm, which is significantly redshifted compared with the benchmark CH 3 NH 3 PbI 3 counterpart (1.55 eV). Bandgap engineering was implemented by chemical substitution in the form of CH 3 NH 3 SnI 3-x Br x solid solutions, which can be controllably tuned to cover much of the visible spectrum, thus enabling the realization of lead-free solar cells with an initial power conversion efficiency of 5.73% under simulated full sunlight. Further efficiency enhancements are expected following optimization and a better fundamental understanding of the internal electron dynamics and corresponding interfacial engineering. The reported CH 3 NH 3 SnI 3-x Br x perovskite solar cells represent a step towards the realization of low-cost, environmentally friendly solid-state solar cells.
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U2 - 10.1038/nphoton.2014.82
DO - 10.1038/nphoton.2014.82
M3 - Article
AN - SCOPUS:84901695701
VL - 8
SP - 489
EP - 494
JO - Nature Photonics
JF - Nature Photonics
SN - 1749-4885
IS - 6
ER -