TY - JOUR
T1 - Narrow-bandgap mixed lead/tin-based 2D Dion-Jacobson perovskites boost the performance of solar cells
AU - Ke, Weijun
AU - Chen, Cong
AU - Spanopoulos, Ioannis
AU - Mao, Lingling
AU - Hadar, Ido
AU - Li, Xiaotong
AU - Hoffman, Justin M.
AU - Song, Zhaoning
AU - Yan, Yanfa
AU - Kanatzidis, Mercouri G.
N1 - Publisher Copyright:
Copyright © 2020 American Chemical Society.
PY - 2020/9/2
Y1 - 2020/9/2
N2 - The advent of the two-dimensional (2D) family of halide perovskites and their demonstration in 2D/three-dimensional (3D) hierarchical film structures broke new ground toward high device performance and good stability. The 2D Dion-Jacobson (DJ) phase halide perovskites are especially attractive in solar cells because of their superior charge transport properties. Here, we report on 2D DJ phase perovskites using a 3-(aminomethyl)piperidinium (3AMP) organic spacer for the fabrication of mixed Pb/Sn-based perovskites, exhibiting a narrow bandgap of 1.27 eV and a long carrier lifetime of 657.7 ns. Consequently, solar cells employing mixed 2D DJ 3AMP-based and 3D MA0.5FA0.5Pb0.5Sn0.5I3 (MA = methylammonium, FA = formamidinium) perovskite composites as light absorbers achieve enhanced efficiency and stability, giving a power conversion efficiency of 20.09% with a high open-circuit voltage of 0.88 V, a fill factor of 79.74%, and a short-circuit current density of 28.63 mA cm-2. The results provide an effective strategy to improve the performance of single-junction narrow-bandgap solar cells and, potentially, to give a highly efficient alternative to bottom solar cells in tandem devices.
AB - The advent of the two-dimensional (2D) family of halide perovskites and their demonstration in 2D/three-dimensional (3D) hierarchical film structures broke new ground toward high device performance and good stability. The 2D Dion-Jacobson (DJ) phase halide perovskites are especially attractive in solar cells because of their superior charge transport properties. Here, we report on 2D DJ phase perovskites using a 3-(aminomethyl)piperidinium (3AMP) organic spacer for the fabrication of mixed Pb/Sn-based perovskites, exhibiting a narrow bandgap of 1.27 eV and a long carrier lifetime of 657.7 ns. Consequently, solar cells employing mixed 2D DJ 3AMP-based and 3D MA0.5FA0.5Pb0.5Sn0.5I3 (MA = methylammonium, FA = formamidinium) perovskite composites as light absorbers achieve enhanced efficiency and stability, giving a power conversion efficiency of 20.09% with a high open-circuit voltage of 0.88 V, a fill factor of 79.74%, and a short-circuit current density of 28.63 mA cm-2. The results provide an effective strategy to improve the performance of single-junction narrow-bandgap solar cells and, potentially, to give a highly efficient alternative to bottom solar cells in tandem devices.
UR - http://www.scopus.com/inward/record.url?scp=85090252144&partnerID=8YFLogxK
U2 - 10.1021/jacs.0c06288
DO - 10.1021/jacs.0c06288
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C2 - 32786780
AN - SCOPUS:85090252144
SN - 0002-7863
VL - 142
SP - 15049
EP - 15057
JO - Journal of the American Chemical Society
JF - Journal of the American Chemical Society
IS - 35
ER -
