Efficient tandem solar cells with solution-processed perovskite on textured crystalline silicon

Yi Hou, Erkan Aydin, Michele de Bastiani, Chuanxiao Xiao, Furkan Halis Isikgor, Ding-Jiang Xue, Bin Chen, Hao Chen, Behzad Bahrami, Ashraful H. Chowdhury, Andrew K. Johnston, Se-Woong Baek, Ziru Huang, Mingyang Wei, Yitong Dong, Joel Troughton, Rawan Jalmood, Alessandro J. Mirabelli, Thomas Allen, Emmanuel Van KerschaverMakhsud I. Saidaminov, Derya Baran, Qiquan Qiao, Kai Zhu, Stefaan De Wolf, E. Sargent

Research output: Contribution to journalArticlepeer-review

499 Scopus citations


Stacking solar cells with decreasing band gaps to form tandems presents the possibility of overcoming the single-junction Shockley-Queisser limit in photovoltaics. The rapid development of solution-processed perovskites has brought perovskite single-junction efficiencies >20%. However, this process has yet to enable monolithic integration with industry-relevant textured crystalline silicon solar cells. We report tandems that combine solution-processed micrometer-thick perovskite top cells with fully textured silicon heterojunction bottom cells. To overcome the charge-collection challenges in micrometer-thick perovskites, we enhanced threefold the depletion width at the bases of silicon pyramids. Moreover, by anchoring a self-limiting passivant (1-butanethiol) on the perovskite surfaces, we enhanced the diffusion length and further suppressed phase segregation. These combined enhancements enabled an independently certified power conversion efficiency of 25.7% for perovskite-silicon tandem solar cells. These devices exhibited negligible performance loss after a 400-hour thermal stability test at 85°C and also after 400 hours under maximum power point tracking at 40°C.
Original languageEnglish (US)
Pages (from-to)1135-1140
Number of pages6
Issue number6482
StatePublished - Mar 6 2020

Bibliographical note

KAUST Repository Item: Exported on 2020-10-01
Acknowledged KAUST grant number(s): OSR-CARF URF/1/3079-33-01, OSR-CRG URF/1/3383, OSR-CRG2018-3737
Acknowledgements: This publication is based upon work supported by the King Abdullah University of Science and Technology (KAUST) Office of Sponsored Research (OSR) under award no. OSR-2018-CPF-3669.02, KAUST OSR-CARF URF/1/3079-33-01, KAUST OSR-CRG URF/1/3383, and KAUST OSR-CRG2018-3737, and in part on work supported by the U.S. Department of the Navy, Office of Naval Research (grant award no. N00014-17-1-2524). This work was authored in part by the National Renewable Energy Laboratory, operated by Alliance for Sustainable Energy, LLC, for the U.S. Department of Energy (DOE) under contract no. DE-AC36-08GO28308 (De-risking Halide Perovskite Solar Cells program of the National Center for Photovoltaics, funded by the DOE Office of Energy Efficiency and Renewable Energy, Solar Energy Technologies Office). The views expressed in the article do not necessarily represent the views of the DOE or the U.S. government. The U.S. government retains and the publisher, by accepting the article for publication, acknowledges that the U.S. government retains a nonexclusive, paid-up, irrevocable, worldwide license to publish or reproduce the published form of this work, or allow others to do so, for U.S. government purposes. This work has been partially supported by NSF MRI (1428992), the U.S.-Egypt Science and Technology (S&T) Joint Fund, and the EDA University Center Program (ED18DEN3030025). This work is derived from the subject data supported in whole or part by NAS and USAID, and any opinions, findings, conclusions, or recommendations expressed in the paper are those of the authors alone, and do not necessarily reflect the views of USAID or NAS.


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