Phosphine Oxide Derivative as a Passivating Agent to Enhance the Performance of Perovskite Solar Cells

Albertus Adrian Sutanto, Cansu Igci, Hobeom Kim, Hiroyuki Kanda, Naoyuki Shibayama, Mounir Mensi, Valentin I.E. Queloz, Cristina Momblona, Hyung Joong Yun, Henk J. Bolink, Aron J. Huckaba, Mohammad Khaja Nazeeruddin

Research output: Contribution to journalArticlepeer-review

10 Scopus citations


Defects of metal-halide perovskites detrimentally influence the optoelectronic properties of the thin film and, ultimately, the photovoltaic performance of perovskite solar cells (PSCs). Especially, defect-mediated nonradiative recombination that occurs at the perovskite interface significantly limits the power conversion efficiency (PCE) of PSCs. In this regard, interfacial engineering or surface treatment of perovskites has become a viable strategy for reducing the density of surface defects, thereby improving the PCE of PSCs. Here, an organic molecule, tris(5-((tetrahydro-2H-pyran-2-yl)oxy)pentyl)phosphine oxide (THPPO), is synthesized and introduced as a defect passivation agent in PSCs. The P≠O terminal group of THPPO, a Lewis base, can passivate perovskite surface defects such as undercoordinated Pb2+. Consequently, improvement of PCEs from 19.87 to 20.70% and from 5.84 to 13.31% are achieved in n-i-p PSCs and hole-transporting layer (HTL)-free PSCs, respectively.

Original languageEnglish
Pages (from-to)1259-1268
Number of pages10
JournalACS Applied Energy Materials
Issue number2
StatePublished - Feb 22 2021

Bibliographical note

Funding Information:
The authors acknowledge the Swiss National Science Foundation (SNSF) funding through the Synergia Grant EPISODE (Grant No. CRSII5_171000). The authors acknowledge funding from the European Commission’s Horizon 2020 Research and Innovation Programme under Grant Agreement No. 763977 of the PerTPV project. The authors acknowledge Professor Raffaella Buonsanti for the use of the Fluorolog system. The authors thank Dr. Nakamura and Dr. Koganezawa at the Japan Synchrotron Radiation Research Institute (JASRI). The GIWAXS measurement was performed at SPring-8 at BL19B2 with the approval of the JASRI, Proposal Nos. 2019B1807 and 2019B1808.

Publisher Copyright:
© 2021 American Chemical Society.


  • HTL-free
  • Lewis base
  • defect passivation
  • perovskite solar cells
  • phosphine oxide
  • surface passivation

ASJC Scopus subject areas

  • Chemical Engineering (miscellaneous)
  • Energy Engineering and Power Technology
  • Electrochemistry
  • Electrical and Electronic Engineering
  • Materials Chemistry


Dive into the research topics of 'Phosphine Oxide Derivative as a Passivating Agent to Enhance the Performance of Perovskite Solar Cells'. Together they form a unique fingerprint.

Cite this