Abstract
Quantum dot (QD) provides a versatile platform for high-throughput processing of semiconductors for large-area optoelectronic applications. Unfortunately, the QD solar cell is hampered by the time-consuming layer-by-layer process, a major challenge in manufacturing printable devices. Here we demonstrate a sequential acylation-coordination protocol including amine-assisted ligand removal and Lewis base-coordinated surface restoration to synthesize conductive APbI3 (A = formamidinium (FA), Cs or methylammonium) colloidal perovskite QD (PeQD) inks that enable one-step PeQD film deposition without additional solid-state ligand exchange. The resultant PeQD film displays uniform morphology with elevated electronic coupling, more ordered structure and homogeneous energy landscape. Narrow-bandgap FAPbI3 PeQD-based solar cells achieve a champion efficiency of 16.61% (certified 16.20%), exceeding the values obtained with other QD inks and layer-by-layer processes. The conductive PeQD inks are compatible with large-area device (9 × 9 cm2) fabrication using the blade-coating technique with a speed up to 50 mm s−1.
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Data availability
The data that support the plots within this paper and other findings of this study are available from the corresponding author upon reasonable request. Source data are provided with this paper.
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Acknowledgements
This work was financially supported by the National Key Research and Development Program of China (no. 2023YFE0210000) (J.Y.), the National Natural Science Foundation of China (no. 52261145696) (J.Y.), China National Postdoctoral Program for Innovative Talents (BX20230255) (X.Z.), China Postdoctoral Science Foundation (2023M742527) (X.Z.), Natural Science Foundation of Jiangsu Province (BK20211598) (J.Y.) and Jiangsu Funding Program for Excellent Postdoctoral Talent (2023ZB405) (X.Z.), ‘111’ project, Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University. This work was partly supported by the National Research Foundation of Korea (NRF) grants funded by the Korean government (MSIT) (no. 2020R1A2C2005844) (D.-H.K.).
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Contributions
X.Z. and J.Y. conceived the project, and W.M. and J.Y. supervised the project. X.Z., H.H. and C.Z. synthesized the FAPbI3, MAPbI3 and CsPbI3 PeQDs, respectively. X.Z. fabricated the PeQD inks, PeQD films and devices and conducted most of the characterizations and experimental analysis. H.H. and C.Z conducted the TEM, DLS and NMR characterizations. L.J. performed the DFT simulations supervised by Y.L. C.L. conducted the GISAXS measurements supervised by D.-H.K. X.Z. drafted the manuscript and revised the manuscript with help from T.W., W.M. and J.Y. All the authors reviewed the paper.
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Nature Energy thanks Guoran Li, Lianzhou Wang and the other, anonymous, reviewer(s) for their contribution to the peer review of this work.
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Supplementary Figs. 1–31, Tables 1–4 and Note 1.
Supplementary Data 1
Source data for Supplementary Figs. 18 and 22.
Source data
Source Data Fig. 1
DLS, FTIR, NMR and Pb 4f spectra source data.
Source Data Fig. 2
Azimuthal integration data extracted from GIWAXS and in-plane line-cuts data extracted from GISAXS.
Source Data Fig. 3
TA mapping source data, current intensity distribution data extracted from c-AFM, and SCLC source data.
Source Data Fig. 4
Device performance source data.
Source Data Fig. 5
PL emission and PL lifetime maps source data and device performance data of large-area PQD films.
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Zhang, X., Huang, H., Zhao, C. et al. Conductive colloidal perovskite quantum dot inks towards fast printing of solar cells. Nat Energy 9, 1378–1387 (2024). https://doi.org/10.1038/s41560-024-01608-5
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DOI: https://doi.org/10.1038/s41560-024-01608-5
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