1. Ligand-bridged charge extraction and enhanced quantum efficiency enable efficient n-i-p perovskite/silicon tandem solar cells
- Author
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Randi Azmi, Michele De Bastiani, Maxime Babics, Bin Chen, Thomas Allen, Edward H. Sargent, Esma Ugur, Emmanuel Van Kerschaver, Shynggys Zhumagali, George T. Harrison, Yi Hou, Frédéric Laquai, Atteq ur Rehman, Jiang Liu, Kai Wang, Aslihan Babayigit, Stefaan De Wolf, Mingcong Wang, Anand S. Subbiah, Erkan Aydin, Furkan Halis Isikgor, Leonidas Tsetseris, Waseem Raja, Aydin, E, Liu, J, Ugur, E, Azmi, R, Harrison, GT, Hou, Y, Chen , B, Zhumagali, S, De Bastiani, M, Wang, MC, Raja, W, Allen, TG, Rehman, AU, Subbiah, AS, Babics, M, BABAYIGIT, Aslihan, Isikgor, FH, Wang, K, Van Kerschaver, E, Tsetseris, L, Sargent, EH, Laquai, F, and De Wolf , S
- Subjects
Materials science ,Silicon ,Passivation ,Renewable Energy, Sustainability and the Environment ,business.industry ,Doping ,chemistry.chemical_element ,02 engineering and technology ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,Pollution ,0104 chemical sciences ,Amorphous solid ,Nuclear Energy and Engineering ,chemistry ,Environmental Chemistry ,Optoelectronics ,Niobium oxide ,Quantum efficiency ,Crystalline silicon ,0210 nano-technology ,business ,Perovskite (structure) - Abstract
Translating the high power conversion efficiencies of single-junction perovskite solar cells in their classic, non-inverted (n-i-p) architecture to efficient monolithic n-i-p perovskite/silicon tandem solar cells with high current densities has been a persistent challenge due to the lack of low-temperature processable, chemically-insoluble contact materials with appropriate polarity and sufficient optical transparency. To address this, we developed sputtered amorphous niobium oxide (a-NbOx) with ligand-bridged C-60 as an efficient electron-selective contact, deposited on the textured-silicon bottom cell. For the sunward, hole-selective contact we implemented a stack of molecularly doped broadband transparent evaporated 2,2 ',7,7 '-tetra(N,N-di-p-tolyl)amino-9,9-spirobifluorene (spiro-TTB) and atomic layer deposited vanadium oxide, which further enhances the device quantum efficiency. Combining these contact materials with two-dimensional perovskite passivation on the micrometer-thick solution-processed perovskite top cell yields 27% efficient monolithic n-i-p perovskite/silicon tandem solar cells, which represents one of the highest power conversion efficiencies reported on pyramidal textured crystalline silicon bottom cells, and the highest with this polarity. The authors would like to thanks to Nini Wei for the TEM images; funding: the research reported in this publication was supported by funding from King Abdullah University of Science and Technology (KAUST) under award no. OSR-CARF/CCF-3079 and award no. IED OSR-2019-4208.
- Published
- 2021