1D Light-Emitting MAPbBr3 Perovskite Encapsulated in Carbon Nanotubes

Valentina A. Eremina*, Timofei Eremin, Hua Jiang, Rakesh Dhama, Jokotadeola Odutola, Humeyra Caglayan, Nikolai V. Tkachenko, Petr A. Obraztsov

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

Abstract

The instability and broad optical features of perovskites limit the full realization of their unique optoelectronic potential. In this study, a novel MAPbBr3@SWCNTs hybrid material is presented, in which methylammonium lead bromide perovskite (MAPbBr3) is successfully encapsulated in single-walled carbon nanotubes (SWCNTs), fabricated in the form of thin films. Encapsulation enables the formation of 1D perovskite structures with narrowband light-emission, confined within a protective carbon nanoshell. A thorough investigation is conducted into the hybrid material's structure, linear optical properties, ultrafast carrier dynamics, and THz conductivity. The encapsulation preserves the distinct characteristics of both MAPbBr3 and SWCNTs while introducing novel optoelectronic effects, including the tuning and spectral unification of perovskite photoluminescence (PL), as well as doping-induced modifications to SWCNT carrier relaxation dynamics. Furthermore, the observation of negative photoconductivity (NPC) response of MAPbBr3@SWCNTs thin films highlights the potential of this innovative material as a strong candidate for future energy-efficient photodetectors, optoelectronic switches, neuromorphic computing devices, photovoltaic enhancers, and flexible electronics.

Original languageEnglish
JournalAdvanced Functional Materials
DOIs
Publication statusE-pub ahead of print - 2025
MoE publication typeA1 Journal article-refereed

Keywords

  • 1D perovskite encapsulation
  • carbon nanotube doping
  • negative photoconductivity
  • photoluminescence unification
  • ultrafast charge carrier dynamics

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