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Magnetic Field-Assisted Interface Embedding Strategy to Construct 2D/3D Composite Structure for Stable Perovskite

Yue Liu1, Yanbo Gao1, Xinyu Bao1

  • 1State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun, 130012, China.

Small (Weinheim an Der Bergstrasse, Germany)
|June 22, 2023
PubMed
Summary

A new magnetic field strategy enhances perovskite solar cells (PSCs) by creating a 2D/3D structure. This improves efficiency and stability, overcoming defects and water degradation for better solar energy conversion.

Keywords:
2D/3D composite structureslateral barrier effectmagnetic inductionperovskite solar cells (PSCs)vertical transfer

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Area of Science:

  • Materials Science
  • Renewable Energy
  • Nanotechnology

Background:

  • Perovskite solar cells (PSCs) offer high efficiency but suffer from stability issues.
  • 2D/3D composite structures aim to combine the efficiency of 3D perovskites with the stability of 2D perovskites.
  • Non-radiative losses from trap states limit conventional 2D/3D PSC performance.

Purpose of the Study:

  • To develop a novel strategy for constructing 2D/3D composite perovskite structures.
  • To address defect passivation and enhance charge transport in PSCs.
  • To improve the efficiency and long-term stability of perovskite solar devices.

Main Methods:

  • A multifunctional magnetic field-assisted interfacial embedding strategy was employed.
  • The method focused on improving perovskite layer crystallinity and passivating defects.
  • The strategy aimed to promote vertical hole transport and provide lateral barrier effects.

Main Results:

  • The 2D/3D composite structure improved crystallinity and passivated defects.
  • Enhanced vertical hole transport and lateral barrier effects were observed.
  • Maximum open-circuit voltage of 1.246 V and fill factor of 81.36% were achieved, leading to a 24.21% power conversion efficiency (PCE).
  • Unencapsulated devices showed improved long-term and humidity stability.
  • Flexible devices achieved a record PCE of 21.23% with enhanced mechanical stability.

Conclusions:

  • The magnetic field-assisted strategy effectively mitigates non-radiative losses in 2D/3D PSCs.
  • The developed composite structure enhances device performance, stability, and encapsulation.
  • This approach represents a significant advancement for high-performance and stable perovskite solar cells, including flexible applications.