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Related Concept Videos

P-N junction01:11

P-N junction

A p-n junction is formed when p-type and n-type semiconductor materials are joined together. At the interface of the p-n junction, holes from the p-side and electrons from the n-side begin to diffuse into the opposite sides due to the concentration gradient. This diffusion of carriers leads to a region around the junction where there are no free charge carriers, known as the depletion region. The charge density within the depletion region for the n-side and p-side can be described by the...

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Related Experiment Video

Updated: May 13, 2026

Ambient Method for the Production of an Ionically Gated Carbon Nanotube Common Cathode in Tandem Organic Solar Cells
14:37

Ambient Method for the Production of an Ionically Gated Carbon Nanotube Common Cathode in Tandem Organic Solar Cells

Published on: November 5, 2014

Bifunctional Interface Synergy for High-Performance Wide-Bandgap and Tandem Perovskite Solar Cells.

Chen Jia1,2,3,4,5, Yuliang Xu6, Xianzhao Wang1,2,3,4,5

  • 1Institute of Photoelectronic Thin Film Devices and Technology, Renewable Energy Conversion and Storage Center, State Key Laboratory of Photovoltaic Materials and Cells, Nankai University, Tianjin, P. R. China.

Small Methods
|May 12, 2026
PubMed
Summary

We developed a new interface modification for wide-bandgap perovskite solar cells using sulfaguanidine and 1,3-diaminopropane dihydroiodide. This strategy boosts efficiency and stability, paving the way for high-performance perovskite tandem solar cells.

Keywords:
hydrogen bondinterfacial energy‐level alignmentmulti‐site coordinatingsynergistic interface engineeringwide‐bandgap perovskite solar cells

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Low Pressure Vapor-assisted Solution Process for Tunable Band Gap Pinhole-free Methylammonium Lead Halide Perovskite Films
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Low Pressure Vapor-assisted Solution Process for Tunable Band Gap Pinhole-free Methylammonium Lead Halide Perovskite Films

Published on: September 8, 2017

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Last Updated: May 13, 2026

Ambient Method for the Production of an Ionically Gated Carbon Nanotube Common Cathode in Tandem Organic Solar Cells
14:37

Ambient Method for the Production of an Ionically Gated Carbon Nanotube Common Cathode in Tandem Organic Solar Cells

Published on: November 5, 2014

Low Pressure Vapor-assisted Solution Process for Tunable Band Gap Pinhole-free Methylammonium Lead Halide Perovskite Films
08:12

Low Pressure Vapor-assisted Solution Process for Tunable Band Gap Pinhole-free Methylammonium Lead Halide Perovskite Films

Published on: September 8, 2017

Area of Science:

  • Materials Science
  • Photovoltaics
  • Solid-State Chemistry

Background:

  • Wide-bandgap (WBG) perovskite solar cells are crucial for efficient all-perovskite tandem devices.
  • Interfacial defects and energy level misalignment hinder WBG sub-cell performance.

Purpose of the Study:

  • To introduce a homogenized bifunctional interface modification strategy for WBG perovskite solar cells.
  • To address interfacial losses and improve energy level alignment.

Main Methods:

  • Integration of sulfaguanidine (SG) and 1,3-diaminopropane dihydroiodide (PDAI2) for interface modification.
  • Formation of a cross-hybrid network by SG for defect passivation and stabilization.
  • Enhancement of charge extraction via PDAI2-induced band offset.

Main Results:

  • Achieved inverted 1.77 eV perovskite solar cells with a champion efficiency of 20.27%.
  • Reduced open-circuit voltage loss to 0.42 V.
  • Demonstrated excellent device stability, retaining 94% efficiency after 800 hours.
  • Enabled an all-perovskite tandem solar cell with a record efficiency of 28.14%.

Conclusions:

  • The synergistic bifunctional strategy effectively minimizes interfacial losses in WBG perovskite solar cells.
  • This approach provides a robust foundation for advancing perovskite tandem photovoltaics.
  • The developed interface modification significantly enhances both efficiency and operational stability.