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Selective Growth of MAPbBr3 Rounded Microcrystals on Micro-Patterned Single-Layer Graphene Oxide/Graphene Platforms

Javier Bartolomé1, María Vila1, Carlos Redondo-Obispo2

  • 1Escuela de Ingeniería de Fuenlabrada, Universidad Rey Juan Carlos, 28933 Madrid, Spain.

Nanomaterials (Basel, Switzerland)
|September 28, 2023
PubMed
Summary

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Effect of Pristine Graphene on Methylammonium Lead Iodide Films and Implications on Solar Cell Performance.

ACS applied energy materials·2022

Hybrid perovskites combined with graphene materials enhance optoelectronic devices. Solution processing of methylammonium lead bromide perovskite on graphene/graphene oxide demonstrates superior photostability and controlled crystal growth.

Area of Science:

  • Materials Science
  • Nanotechnology
  • Optoelectronics

Background:

  • Hybrid perovskites and graphene materials offer synergistic benefits for optoelectronic devices.
  • Solution processing of perovskites onto graphene substrates presents significant challenges.

Purpose of the Study:

  • To investigate the growth of methylammonium lead bromide (MAPbBr3) perovskite on patterned graphene/graphene oxide (Gr/GO) substrates.
  • To explore methods for controlling perovskite nucleation and growth habits.
  • To evaluate the photostability of perovskite grown on Gr/GO compared to glass.

Main Methods:

  • Solution processing of MAPbBr3 perovskite onto patterned Gr/GO substrates.
  • Morphological and structural characterization using microscopy and diffraction techniques.
Keywords:
AFMX-ray diffractionexcitonsgraphenegraphene oxidehybrid perovskiteslocal anodic oxidation (LAO)photoluminescencesolution-processedstability

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  • Photoluminescence spectroscopy to assess crystal properties and photostability.

    • Main Results:

    • Successfully grown oriented MAPbBr3 crystals with controlled sizes and morphologies on Gr/GO patterns.
    • Identified substrate characteristics and nucleation rate as key factors influencing perovskite growth.
    • Developed a method to control nucleation rate via precursor concentration and layer deposition.
    • Demonstrated significantly enhanced photostability of MAPbBr3 on Gr/GO, especially for microcrystals enduring high light densities (130 kW/cm2).

    Conclusions:

    • Solution processing of perovskite on Gr/GO is feasible and leads to enhanced device properties.
    • Controlled perovskite growth on Gr/GO enables the design of stable optoelectronic nanostructures.
    • The findings pave the way for nanoengineered devices with improved performance and longevity.