Linked Nickel Oxide/Perovskite Interface Passivation for High-Performance Textured Monolithic Tandem Solar Cells

Shynggys Zhumagali, Furkan Halis Isikgor, Partha Maity, Jun Yin, Esma Ugur, Michele de Bastiani, Anand Selvin Subbiah, Alessandro James Mirabelli, Randi Azmi, George T. Harrison, Joel Troughton, Erkan Aydin, Jiang Liu, Thomas Allen, Atteq Ur Rehman, Derya Baran, Omar F. Mohammed, Stefaan De Wolf

Research output: Contribution to journalArticlepeer-review

91 Scopus citations


Sputtered nickel oxide (NiOx) is an attractive hole-transport layer for efficient, stable, and large-area p-i-n metal-halide perovskite solar cells (PSCs). However, surface traps and undesirable chemical reactions at the NiOx/perovskite interface are limiting the performance of NiOx-based PSCs. To address these issues simultaneously, an efficient NiOx/perovskite interface passivation strategy by using an organometallic dye molecule (N719) is reported. This molecule concurrently passivates NiOx and perovskite surface traps, and facilitates charge transport. Consequently, the power conversion efficiency (PCE) of single-junction p-i-n PSCs increases from 17.3% to 20.4% (the highest reported value for sputtered-NiOx based PSCs). Notably, the N719 molecule self-anchors and conformally covers NiOx films deposited on complex surfaces. This enables highly efficient textured monolithic p-i-n perovskite/silicon tandem solar cells, reaching PCEs up to 26.2% (23.5% without dye passivation) with a high processing yield. The N719 layer also forms a barrier that prevents undesirable chemical reactions at the NiOx/perovskite interface, significantly improving device stability. These findings provide critical insights for improved passivation of the NiOx/perovskite interface, and the fabrication of highly efficient, robust, and large-area perovskite-based optoelectronic devices.
Original languageEnglish (US)
Pages (from-to)2101662
JournalAdvanced Energy Materials
StatePublished - Sep 5 2021

Bibliographical note

KAUST Repository Item: Exported on 2021-09-09
Acknowledged KAUST grant number(s): IED OSR-2019-4208, KAUST OSR-CRG RF/1/3383, OSR-2018-CARF/CCF-3079, OSR-CRG2018-3737
Acknowledgements: S.Z. and F.H.I. contributed equally to this work. The authors thank the members of the KAUST Solar Center operations team for their technical help and support. 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. KAUST OSR-2018-CARF/CCF-3079, KAUST OSR-CRG RF/1/3383, KAUST OSR-CRG2018-3737, and IED OSR-2019-4208.

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • General Materials Science


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