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Related Concept Videos

P-N junction01:11

P-N junction

519
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...
519

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Updated: Jun 25, 2025

In situ Grazing Incidence Small Angle X-ray Scattering on Roll-To-Roll Coating of Organic Solar Cells with Laboratory X-ray Instrumentation
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Multi-Functional PEDOT:PSS as the Efficient Perovskite Solar Cells.

Kyoungtae Kim1, Minhee Kim1, Hyeonseok Lee1

  • 1Department of Chemistry, Kwangwoon University, Seoul, 01897, South Korea.

Small (Weinheim an Der Bergstrasse, Germany)
|May 25, 2024
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Summary

Two additives, Bisphenol A diglycidyl ether (DGEBA) and Dimethyl sulfoxide (DMSO), enhance Poly(3,4-ethylenedioxythiophene) (PEDOT:PSS) films. This modification boosts solar cell efficiency and stability, showcasing improved conductive polymer applications.

Keywords:
PEDOT:PSSconductivityhydrophobicperovskitestability

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Area of Science:

  • Materials Science
  • Organic Electronics
  • Photovoltaics

Background:

  • Poly(3,4-ethylenedioxythiophene) (PEDOT) complexed with poly(styrene sulfonate) (PEDOT:PSS) is a leading conductive polymer.
  • PEDOT:PSS offers high conductivity, light transmissibility, water processability, and flexibility.
  • Perovskite solar cells require stable and efficient hole transport layers.

Purpose of the Study:

  • To investigate the effects of Bisphenol A diglycidyl ether (DGEBA) and Dimethyl sulfoxide (DMSO) additives on PEDOT:PSS films.
  • To enhance the performance and stability of perovskite solar cells using modified PEDOT:PSS.
  • To explore the mechanisms by which DGEBA and DMSO improve PEDOT:PSS properties.

Main Methods:

  • Modification of the poly(styrene sulfonate) (PSS) component of PEDOT:PSS films with DGEBA and DMSO.
  • Fabrication of ITO/M-PEDOT:PSS/Perovskite/PCBM/Ag structured reverse solar cells.
  • Characterization of film properties, including hydrophobicity and conductivity.
  • Performance testing of solar cells, including power conversion efficiency (PCE) and stability under thermal and light stress.

Main Results:

  • Both DGEBA and DMSO additives induced grain size growth in PEDOT:PSS films.
  • DGEBA imparted hydrophobicity to the PEDOT:PSS layer, acting as a passivation layer for the perovskite.
  • DMSO addition separated PSS groups, increasing conductivity via enhanced hole mobility.
  • The modified PEDOT:PSS significantly improved the power conversion efficiency (PCE) of perovskite solar cells from 15.28% to 17.80%.
  • The modified solar cells demonstrated enhanced stability, retaining 90% performance for 500 hours at 60°C and 300 hours under 1 sun illumination.

Conclusions:

  • DGEBA and DMSO are effective additives for enhancing PEDOT:PSS properties for solar cell applications.
  • The multi-modified PEDOT:PSS serves as a superior hole transport layer, improving both efficiency and stability of perovskite solar cells.
  • This study presents a viable strategy for developing more robust and efficient organic electronic devices.