Stable perovskite solar cells using tin acetylacetonate based electron transporting layers

Mousa Abuhelaiqa, Sanghyun Paek, Yonghui Lee, Kyung Taek Cho, Sung Heo, Emad Oveisi, Aron Joel Huckaba, Hiroyuki Kanda, Hobeom Kim, Yi Zhang, Robin Humphry-Baker, Sachin Kinge, Abdullah M. Asiri, Mohammad Khaja Nazeeruddin

Research output: Contribution to journalArticlepeer-review

48 Scopus citations


Organic-inorganic lead halide perovskites with over 23% power conversion efficiency have attracted enormous academic and industrial attention due to their low-cost fabrication and high device performance. Self-passivated tin oxide as an electron transport layer has shown potential mainly due to the enhanced electron transfer, stability and reduced hysteresis device features. Here we report on novel, non-colloidal tin oxide precursors based on acetylacetonate (one halide free and two halogenated with Cl and Br respectively). We explore the unique film morphology acquired from the non-colloidal precursors and the improved device performance they yield. Our results show that the halide residue in the films plays an impactful role in the thermal durability of the fabricated SnO2 film, as well as providing a passivation layer. Moreover, our optimized tin oxide films achieved an unprecedented power conversion efficiency of 22.19% in planar perovskite solar cells (21.4% certified by Newport), and once upscaled to large-area modules, 16.7% devices based on a 15 cm2 area were achieved.

Original languageEnglish
Pages (from-to)1910-1917
Number of pages8
JournalEnergy and Environmental Science
Issue number6
StatePublished - Jun 2019

Bibliographical note

Funding Information:
Mousa Abuhelaiqa thanks the Qatar National Research Fund (QNRF) for scholarship support. The authors acknowledge financial support from SNSF NRP 70 project; number: 407040_ 154056, CTI 25590.1 PFNM-NM, Solaronix, Aubonne, Switzerland, Toyota Motor Corporation, Toyota Motor Technical Centre, Advanced Technology Div., Hoge Wei 33, B-1930 Zaventum, Belgium, US Army grant agreement No. W911NF-17-2-0122 and the European Project APOLO (H2020-LCE-2017-RES-RIA), grant agreement number 763989. The authors also thank Borun New Material Technology for providing high quality spiro-OMeTAD.

Publisher Copyright:
© 2019 The Royal Society of Chemistry.

ASJC Scopus subject areas

  • Environmental Chemistry
  • Renewable Energy, Sustainability and the Environment
  • Nuclear Energy and Engineering
  • Pollution


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