Manganese Porphyrin Interface Engineering in Perovskite Solar Cells

Konstantina Gkini, Nikolaos Balis, Michael Papadakis, Apostolis Verykios, Maria Christina Skoulikidou, Charalampos Drivas, Stella Kennou, Matthias Golomb, Aron Walsh, Athanassios G. Coutsolelos, Maria Vasilopoulou, Polycarpos Falaras

Research output: Contribution to journalArticlepeer-review

Abstract

An interfacial engineering approach was adopted in order to optimize the photovoltaic parameters and the stability of n-i-p planar perovskite solar cells (PSCs). A thin manganese (Mn) porphyrin [(TMePyP)I4Mn(AcO)] layer was introduced between the titania (TiO2) electron transport layer (ETL) and the perovskite absorber. The introduction of porphyrin onto the TiO2 substrate provoked a significant decrease in the work function (WF), which arose from the large local dipole moment. The modification also provided a more hydrophobic environment that favored the growth of homogeneous and large perovskite crystals. Moreover, the electron charge transport to the ETL was facilitated via the highly paramagnetic character of the Mn porphyrin, whereas the negative impact of humidity and oxygen on the PSC performance was hindered. Density functional theory analysis justified the observed large decrease of the WF and the strong electronic coupling of porphyrin with the TiO2 compact layer (following the porphyrin deposition), which are beneficial for electron extraction. By combining the Mn porphyrin and the CH3NH3PbI3 perovskite, significant enhancement of the stabilized power conversion efficiency by 22% was recorded. The shelf-shield stability was also improved after more than 600 h of storage in the dark under ambient conditions.

Original languageEnglish
Pages (from-to)7353-7363
Number of pages11
JournalACS Applied Energy Materials
Volume3
Issue number8
DOIs
Publication statusPublished - 2020 Aug 24

Bibliographical note

Funding Information:
This work was supported by European Union’s Horizon 2020 Marie Curie Innovative Training Network 764787 “MAESTRO” project.

All Science Journal Classification (ASJC) codes

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

Fingerprint Dive into the research topics of 'Manganese Porphyrin Interface Engineering in Perovskite Solar Cells'. Together they form a unique fingerprint.

Cite this