Artificial p–n-like Junction Based on Pure 2D Organic–Inorganic Halide Perovskite Structure Having Naphthalene Diimide Acceptor Moieties

Zhao Feng, Xuelong Liu, Kentaro Imaoka, Tomohiro Ishii, Ganbaatar Tumen-Ulzii, Xun Tang, George F. Harrington, Benoît Heinrich, Jean Charles Ribierre, Lise Marie Chamoreau, Lydia Sosa Vargas, David Kreher, Kenichi Goushi, Toshinori Matsushima, Guijiang Zhou*, Fabrice Mathevet*, Chihaya Adachi*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

2D organic–inorganic perovskites are an emerging class of materials with great potential for optoelectronics since a wide variety of large functional chromophores can be regularly incorporated. Among this new type of materials, hybrid perovskite systems incorporating strong electron acceptor molecules are considered as a promising approach to designing a new type of functional 2D perovskites for optoelectronics. In this work, a rare example of organic–inorganic 2D perovskite incorporating strong acceptors such as naphthalene diimide (NDI) building blocks between inorganic sheets is presented. This hybrid architecture forms highly air-stable thin films with a structure consisting of inorganic perovskite monolayers of metal-halide octahedra separated by bilayers of NDI-based organic cations. The presence of strong electron-accepting moieties in this multifunctional donor–acceptor hybrid heterostructure leads to a rare type II heterojunction in which the excitons can be efficiently dissociated via the electron-transfer process and in which holes and electrons can be easily confined in the inorganic and organic sublayers, respectively. Such an ultimate p–n heterojunction shows improved photoconduction properties with a photocurrent multiplied by ≈40 under white-light illumination in comparison to a similar 2D perovskite structure containing optically and electrically inert alkyl chains as organic components.

Original languageEnglish
Article number2202734
JournalAdvanced Optical Materials
Volume11
Issue number10
DOIs
Publication statusPublished - 12 Mar 2023

Keywords

  • 2D perovskites
  • electron transfer
  • naphthalene diimide (NDI)
  • photoconduction
  • p–n heterojunction

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