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Related Experiment Video

Updated: Nov 10, 2025

Flash Infrared Annealing for Perovskite Solar Cell Processing
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GABr Post-Treatment for High-Performance MAPbI3 Solar Cells on Rigid Glass and Flexible Substrate.

Tingting Chen1, Rui He1, Fan Zhang2

  • 1College of Materials Science and Engineering, Sichuan University, Chengdu 610065, China.

Nanomaterials (Basel, Switzerland)
|April 3, 2021
PubMed
Summary

Guanidine hydrobromide post-treatment significantly enhances perovskite solar cell performance by reducing voltage loss and hysteresis. This breakthrough boosts efficiency in both rigid and flexible devices, paving the way for advanced solar technologies.

Keywords:
flexible perovskite solar cellnonradiative recombinationpost-treatment

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Area of Science:

  • Materials Science
  • Renewable Energy
  • Photovoltaics

Background:

  • Perovskite solar cells (PSCs) offer high efficiency due to tunable properties of hybrid perovskites.
  • Planar PSCs face challenges with significant open-circuit voltage (Voc) loss and hysteresis.
  • Methylammonium lead iodide (MAPbI3) is a key material in PSC development.

Purpose of the Study:

  • To improve the performance of MAPbI3 n-i-p planar perovskite solar cells.
  • To address Voc loss and hysteresis issues in PSC devices.
  • To investigate the effect of Guanidine hydrobromide (GABr) post-treatment.

Main Methods:

  • Application of Guanidine hydrobromide (GABr) as a post-treatment for MAPbI3 perovskite layers.
  • Characterization of perovskite films to analyze surface morphology, trap states, and energy levels.
  • Fabrication and testing of both rigid (glass substrate) and flexible PSC devices.

Main Results:

  • GABr post-treatment led to a smoother MAPbI3 absorber layer.
  • A reduction in trap states and optimized energy level alignment were observed.
  • Significant mitigation of Voc loss and hysteresis effect in MAPbI3 PSCs.
  • Rigid PSCs achieved over 20% efficiency with a Voc of 1.13 V.
  • Flexible PSC efficiency increased from 15.77% to 17.57% due to Voc loss elimination.

Conclusions:

  • GABr post-treatment is an effective strategy to enhance PSC performance.
  • The method successfully reduces Voc loss and hysteresis, improving device stability and efficiency.
  • This approach is viable for both rigid and flexible perovskite solar cell applications.