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  1. Home
  3. Dual-sam/al2o3-nanoparticles Hole-selective Stack With Bcp/peai Passivation Enabling High Performance Inverted Perovskite Solar Cells.
  1. Home
  3. Dual-sam/al2o3-nanoparticles Hole-selective Stack With Bcp/peai Passivation Enabling High Performance Inverted Perovskite Solar Cells.

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Dual-SAM/Al2O3-Nanoparticles Hole-Selective Stack With BCP/PEAI Passivation Enabling High Performance Inverted

Wenzhi Yang1, Renbin Ju2, Qiang Gao1

  • 1School of Materials Science and Engineering, School of Chemistry and Chemical Engineering, North Minzu University, Yinchuan, P. R. China.

Small (Weinheim an Der Bergstrasse, Germany)
|June 15, 2026

View abstract on PubMed

Summary
This summary is machine-generated.

A novel dual-interface design using alumina nanoparticles and phosphonic acid self-assembled monolayers (SAMs) enhances perovskite solar cell efficiency and stability. This strategy suppresses recombination and improves charge transport for high-performance devices.

Keywords:
grain boundarypassivationperovskite solar cellsresidual strainstability

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Area of Science:

  • Materials Science
  • Renewable Energy
  • Nanotechnology

Background:

  • Single-layer self-assembled monolayers (SAMs) in perovskite solar cells (PSCs) face challenges in balancing carrier extraction and device stability.
  • Hole-selective SAMs are crucial for high-performance inverted PSCs.

Purpose of the Study:

  • To develop a dual-interface architecture for improved efficiency and stability in inverted PSCs.
  • To address limitations of conventional single-layer SAMs in PSCs.

Main Methods:

  • Designed a dual-interface architecture with alumina nanoparticles (Al2O3-NPs) sandwiched between two phosphonic acid-based SAMs.
  • Incorporated a BCP/PEAI bilayer overlayer to passivate perovskite surface defects and enhance electron extraction.
  • Investigated the role of Al-O-P bridging linkages and π-π stacking interactions.

Main Results:

  • Achieved a champion power conversion efficiency (PCE) of 25.13% with a fill factor of 82.6%.
  • Demonstrated negligible hysteresis and significant device stability with 73.8% PCE retention after 2700 hours of ambient storage.
  • The dual-interface architecture effectively sealed pinholes, balanced charge transport, and suppressed non-radiative recombination.

Conclusions:

  • The dual-interface molecular engineering strategy offers a pathway to highly efficient and stable PSCs.
  • Al2O3-NPs and phosphonic acid SAMs synergistically enhance device performance.
  • The BCP/PEAI overlayer further contributes to defect passivation and improved charge extraction.