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Related Concept Videos

Interfacial Electrochemical Methods: Overview01:06

Interfacial Electrochemical Methods: Overview

Interfacial electrochemical methods focus on the phenomena occurring at the boundary between an electrode and a solution, as opposed to bulk methods that concentrate on the solution's overall properties. These interfacial methods are classified as either static or dynamic based on the presence of a nonzero current in the electrochemical cell and the consistency of analyte concentrations. Static methods, such as potentiometry, measure the cell's potential without any significant current passing...

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Related Experiment Video

Updated: May 28, 2026

Influence of Hybrid Perovskite Fabrication Methods on Film Formation, Electronic Structure, and Solar Cell Performance
11:38

Influence of Hybrid Perovskite Fabrication Methods on Film Formation, Electronic Structure, and Solar Cell Performance

Published on: February 27, 2017

Buried Interface Engineering in Perovskite Solar Cells: Selective vs Spontaneous Heterointerface Modulation Using

Daisuke Kubota1,2, Atsushi Kogo1, Hiroyuki Yaguchi2

  • 1National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan.

ACS Applied Materials & Interfaces
|May 27, 2026
PubMed
Summary
This summary is machine-generated.

Selective heterointerface modulation (SEHM) offers a new approach to enhance perovskite solar cells (PSCs) by treating surfaces before deposition. This method improves photovoltaic performance without degrading the perovskite material, unlike spontaneous heterointerface modulation (SPHM).

Keywords:
fluorinated anionfluorinefluoroanionmolecular ionselective heterointerface modulation (SEHM)solar energy conversionspontaneous heterointerface modulator (SPHM)

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Flash Infrared Annealing for Perovskite Solar Cell Processing
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Flash Infrared Annealing for Perovskite Solar Cell Processing

Published on: February 3, 2021

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Last Updated: May 28, 2026

Influence of Hybrid Perovskite Fabrication Methods on Film Formation, Electronic Structure, and Solar Cell Performance
11:38

Influence of Hybrid Perovskite Fabrication Methods on Film Formation, Electronic Structure, and Solar Cell Performance

Published on: February 27, 2017

Flash Infrared Annealing for Perovskite Solar Cell Processing
05:15

Flash Infrared Annealing for Perovskite Solar Cell Processing

Published on: February 3, 2021

Area of Science:

  • Materials Science
  • Photovoltaics
  • Nanotechnology

Background:

  • Perovskite solar cells (PSCs) rely on heterointerface modulation due to their multilayered structure, which can create defects.
  • Spontaneous heterointerface modulation (SPHM) materials offer a process-free approach to modulate interfaces during PSC fabrication.
  • Tetrafluoroborate (BF4-)-based materials are known SPHMs that can enhance PSC performance but may degrade perovskite bulk properties.

Purpose of the Study:

  • To develop a new interface modulation strategy that avoids the bulk degradation issues associated with SPHM.
  • To investigate the effectiveness of selective heterointerface modulation (SEHM) using BF4-based materials on the perovskite/electron transport layer interface.
  • To compare the performance and material compatibility of SEHM versus SPHM.

Main Methods:

  • Defined and implemented an ex situ surface treatment (SEHM) on the TiO2 layer prior to perovskite deposition.
  • Utilized a BF4-based material for SEHM to modulate the buried perovskite/electron transport material (ETM) interface in n-i-p PSCs.
  • Analyzed the impact of SEHM on both the perovskite bulk properties and the heterointerface characteristics.

Main Results:

  • SEHM effectively modulated the perovskite/ETM interface with negligible impact on the FAPbI3 perovskite bulk properties.
  • SEHM significantly enhanced photovoltaic performance, primarily by increasing the open-circuit voltage, an improvement not achieved by SPHM.
  • The SEHM approach demonstrated superior compatibility with BF4-based modulators susceptible to decomposition compared to SPHM.

Conclusions:

  • SEHM is a potent and versatile technology for interface modulation in PSCs, especially when using modulators prone to decomposition.
  • This technique offers advantages over SPHM by preserving perovskite bulk integrity while effectively enhancing device performance.
  • SEHM is broadly applicable beyond BF4-based systems, paving the way for advanced PSC development and materials science innovation.