Quantum-size-tuned heterostructures enable efficient and stable inverted perovskite solar cells
Park, So Min
Atapattu, Harindi R.
Johnston, Andrew K.
Jung, Eui Hyuk
Proppe, Andrew H.
Graham, Kenneth R.
KAUST DepartmentPhysical Science and Engineering (PSE) Division
KAUST Solar Center (KSC)
Material Science and Engineering Program
Embargo End Date2022-10-07
Permanent link to this recordhttp://hdl.handle.net/10754/676282
MetadataShow full item record
AbstractThe energy landscape of reduced-dimensional perovskites (RDPs) can be tailored by adjusting their layer width (n). Recently, two/three-dimensional (2D/3D) heterostructures containing n = 1 and 2 RDPs have produced perovskite solar cells (PSCs) with >25% power conversion efficiency (PCE). Unfortunately, this method does not translate to inverted PSCs due to electron blocking at the 2D/3D interface. Here we report a method to increase the layer width of RDPs in 2D/3D heterostructures to address this problem. We discover that bulkier organics form 2D heterostructures more slowly, resulting in wider RDPs; and that small modifications to ligand design induce preferential growth of n ≥ 3 RDPs. Leveraging these insights, we developed efficient inverted PSCs (with a certified quasi-steady-state PCE of 23.91%). Unencapsulated devices operate at room temperature and around 50% relative humidity for over 1,000 h without loss of PCE; and, when subjected to ISOS-L3 accelerated ageing, encapsulated devices retain 92% of initial PCE after 500 h.
CitationChen, H., Teale, S., Chen, B., Hou, Y., Grater, L., Zhu, T., Bertens, K., Park, S. M., Atapattu, H. R., Gao, Y., Wei, M., Johnston, A. K., Zhou, Q., Xu, K., Yu, D., Han, C., Cui, T., Jung, E. H., Zhou, C., … Sargent, E. H. (2022). Quantum-size-tuned heterostructures enable efficient and stable inverted perovskite solar cells. Nature Photonics. https://doi.org/10.1038/s41566-022-00985-1
SponsorsThis research was made possible by the US Department of the Navy, Office of Naval Research Grant (N00014-20-1-2572). This work was supported in part by the Ontario Research Fund-Research Excellence program (ORF7-Ministry of Research and Innovation, Ontario Research Fund-Research Excellence Round 7). We appreciate the Shanghai Synchrotron Radiation Facility (beamline 14B and 16B) and X. Gao and Z. Su for their help with GIWAXS characterization. Z.N. is grateful for support by the National Key Research Program (2021YFA0715502, 2016YFA0204000) and the National Science Fund of China (61935016). S.M.P., H.R.A. and K.R.G. acknowledge the US Department of Energy under Grant DE-SC0018208 for supporting the UPS and IPES measurements. T.F. and T.C. acknowledge the Canadian Foundation for Innovation and the Natural Science and Engineering Council of Canada (NSERC) for KPFM measurements.
F.L and Y.G. were funded by the King Abdullah University of Science and Technology (KAUST) Office of Sponsored Research (OSR) under Award No: OSR-CARF/CCF-3079 and OSR-2018-CRG7-3737
PublisherSpringer Science and Business Media LLC