In/Bi-based Direct- and Indirect-Gap Hybrid Double-Perovskite-Derived 1D Halides with Near-Unity Quantum Yield via Sb3+ Doping

Ruiqian Li, Yifan Zhou, Xuanyu Zhang, Jiawei Lin, Jian Chen, Congcong Chen, Xin Pan, Pan Wang, Rui Chen, Jun Yin, Lingling Mao

Research output: Journal article publicationJournal articleAcademic researchpeer-review

5 Citations (Scopus)

Abstract

The hybrid halide double-perovskite family is a highly diverse system that allows a wide range of property tunings via structural variations. Using organic components instead of small A-site cations to reduce the dimensionality of the structure and doping metal cations can modulate their structure and improve the optoelectronic performance. Here, by introducing an organic cationic ligand morpholine (Mor), we report on a new family of double-perovskite-derived halides (Mor)2ABX6 (A = Na, K; B = In, Bi; X = Cl, Br) with several unique types of one-dimensional (1D) structures constituted by [AX4O2] and [BX6] octahedron units. These materials are nonemissive at room temperature, while with an Sb3+-doping strategy, the photoluminescence can be drastically enhanced. For (Mor)2KInX6, their quantum efficiencies are improved to near unity via Sb3+ doping. Meanwhile, for (Mor)2KBiX6, the photoluminescence improvement from Sb3+ doping is negligible. With density functional theory calculations, (Mor)2KInBr6 and (Mor)2KBiBr6 have been identified to have direct- and indirect- band gap, respectively. This work expands a new material space for organic-inorganic hybrid double-perovskite-derived materials and provides insights into tuning their optical properties.

Original languageEnglish
Pages (from-to)9362-9369
Number of pages8
JournalChemistry of Materials
Volume35
Issue number21
DOIs
Publication statusPublished - 25 Oct 2023

ASJC Scopus subject areas

  • General Chemistry
  • General Chemical Engineering
  • Materials Chemistry

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