TY - JOUR
T1 - High-throughput compositional mapping of triple-cation tin–lead perovskites for high-efficiency solar cells
AU - Gunasekaran, Rajendra Kumar
AU - Jung, Jina
AU - Yang, Sung Woong
AU - Yun, Jungchul
AU - Yun, Yeonghun
AU - Vidyasagar, Devthade
AU - Choi, Won Chang
AU - Lee, Chang Lyoul
AU - Noh, Jun Hong
AU - Kim, Dong Hoe
AU - Lee, Sangwook
N1 - Publisher Copyright:
© 2023 The Authors. InfoMat published by UESTC and John Wiley & Sons Australia, Ltd.
PY - 2023/4
Y1 - 2023/4
N2 - Mixed tin–lead perovskites suffer from structural instability and rapid tin oxidation; thus, the investigation of their optimal composition ranges is important to address these inherent weaknesses. The critical role of triple cations in mixed Sn–Pb iodides is studied by performing a wide range of compositional screenings over mechanochemically synthesized bulk and solution-processed thin films. A ternary phase map of FA (Sn0.6Pb0.4)I3, MA(Sn0.6Pb0.4)I3, and Cs(Sn0.6Pb0.4)I3 is formed, and a promising composition window of (FA0.6−xMA0.4Csx)Sn0.6Pb0.4I3 (0 ≤ x ≤ 0.1) is demonstrated through phase, photoluminescence, and stability evaluations. Solar cell performance and chemical stability across the targeted compositional space are investigated, and FA0.55MA0.4Cs0.05Sn0.6Pb0.4I3 with strain-relaxed lattices, reduced defect densities, and improved oxidation stability is demonstrated. The inverted perovskite solar cells with the optimal composition demonstrate a power conversion efficiency of over 22% with an open-circuit voltage of 0.867 V, which corresponds to voltage loss of 0.363 V, promising for the development of narrow-bandgap perovskite solar cells.
AB - Mixed tin–lead perovskites suffer from structural instability and rapid tin oxidation; thus, the investigation of their optimal composition ranges is important to address these inherent weaknesses. The critical role of triple cations in mixed Sn–Pb iodides is studied by performing a wide range of compositional screenings over mechanochemically synthesized bulk and solution-processed thin films. A ternary phase map of FA (Sn0.6Pb0.4)I3, MA(Sn0.6Pb0.4)I3, and Cs(Sn0.6Pb0.4)I3 is formed, and a promising composition window of (FA0.6−xMA0.4Csx)Sn0.6Pb0.4I3 (0 ≤ x ≤ 0.1) is demonstrated through phase, photoluminescence, and stability evaluations. Solar cell performance and chemical stability across the targeted compositional space are investigated, and FA0.55MA0.4Cs0.05Sn0.6Pb0.4I3 with strain-relaxed lattices, reduced defect densities, and improved oxidation stability is demonstrated. The inverted perovskite solar cells with the optimal composition demonstrate a power conversion efficiency of over 22% with an open-circuit voltage of 0.867 V, which corresponds to voltage loss of 0.363 V, promising for the development of narrow-bandgap perovskite solar cells.
KW - compositional engineering
KW - mixed tin–lead iodides
KW - narrow-bandgap perovskites
KW - perovskite solar cells
KW - strain relaxation
KW - ternary phase mapping
UR - http://www.scopus.com/inward/record.url?scp=85146334761&partnerID=8YFLogxK
U2 - 10.1002/inf2.12393
DO - 10.1002/inf2.12393
M3 - Article
AN - SCOPUS:85146334761
SN - 2567-3165
VL - 5
JO - InfoMat
JF - InfoMat
IS - 4
M1 - e12393
ER -