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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...
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...
Biasing of P-N Junction01:16

Biasing of P-N Junction

The operation of a p-n junction diode involves various biasing conditions, including forward bias, reverse bias, and equilibrium.
In equilibrium, no external voltage is applied across the p-n junction. The depletion region is formed at the junction interface due to the diffusion of carriers, which leaves behind charged dopants, acceptors on the p-side, and donors on the n-side. These immobile charges create an electric field that prevents further diffusion of carriers. The related energy band...
Potential Due to a Polarized Object01:29

Potential Due to a Polarized Object

A neutral atom consists of a positively charged nucleus surrounded by a negatively charged electron cloud. When placed in an external electric field, the external electric force pulls the electrons and nucleus apart, opposite to the intrinsic attraction between the nucleus and the electrons. The opposing forces balance each other with a slight shift between the center of masses of the nucleus and the electron cloud, resulting in a polarized atom. On the other hand, a few molecules, like water,...
Contact Angle01:13

Contact Angle

When a solid is dipped inside a liquid, the liquid surface becomes curved near the contact. For some solid–liquid interfaces, the liquid is pulled up along the solid, while for others, the liquid surface is convex or depressed near the solid surface. This phenomenon can be explained using the concept of cohesive and adhesive forces.
The adhesive force is the molecular force between molecules of different materials, that is, between the molecules of the solid and the liquid. The cohesive force...
Intermolecular Forces03:13

Intermolecular Forces

Atoms and molecules interact through bonds (or forces): intramolecular and intermolecular. The forces are electrostatic as they arise from interactions (attractive or repulsive) between charged species (permanent, partial, or temporary charges) and exist with varying strengths between ions, polar, nonpolar, and neutral molecules. The different types of intermolecular forces are ion–dipole, dipole–dipole, hydrogen bonds, and dispersion; among these, dipole–dipole, hydrogen bonds, and dispersion...

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Ambient Method for the Production of an Ionically Gated Carbon Nanotube Common Cathode in Tandem Organic Solar Cells
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Published on: November 5, 2014

Interfacial Potential Compensation for HOMO Alignment in Ternary Organic Solar Cells.

Zhen Gao1, Weidong Li1, Heng Liu2

  • 1School of Materials Science and Engineering, Ocean University of China, Qingdao, China.

Small (Weinheim an Der Bergstrasse, Germany)
|July 10, 2026
PubMed
Summary

High-performance ternary organic solar cells (OSCs) require understanding hidden interfacial potential shifts. Synchronized potential compensation in alloyed donor morphologies unlocks efficient charge generation and maximized photovoltaic gaps.

Keywords:
HOMO alignmentenergy level alignmentinterfacial potential compensationmaximized photovoltaic gapminimized HOMO offsetternary organic solar cell

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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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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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Last Updated: Jul 12, 2026

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In situ Grazing Incidence Small Angle X-ray Scattering on Roll-To-Roll Coating of Organic Solar Cells with Laboratory X-ray Instrumentation
06:49

In situ Grazing Incidence Small Angle X-ray Scattering on Roll-To-Roll Coating of Organic Solar Cells with Laboratory X-ray Instrumentation

Published on: March 2, 2021

Area of Science:

  • Materials Science
  • Organic Electronics
  • Photovoltaics

Background:

  • Conventional ternary organic solar cell (OSC) design rules often rely on simplified energy-level alignment (ELA) models.
  • These models frequently neglect crucial interfacial potential shifts, hindering a complete understanding of device performance.

Purpose of the Study:

  • To investigate the role of interfacial potential shifts and alloy donor morphology in ternary OSCs.
  • To reveal the underlying mechanisms for achieving high-performance in multi-component organic solar cells.

Main Methods:

  • Utilized the monolayer-by-monolayer Langmuir-Schaefer method for precise film deposition.
  • Employed photoelectron spectroscopy to directly characterize ELA at donor-acceptor interfaces within ternary blends.

Main Results:

  • Identified synchronized contact-induced potential steps at donor-acceptor interfaces in dual-donor ternary blends.
  • Demonstrated that these potential steps compensate for intrinsic HOMO offsets, creating a unified HOMO-level landscape.
  • Showcased how alloy donor morphology and potential compensation enable efficient charge generation and maximize the photovoltaic gap.

Conclusions:

  • Interfacial potential shifts and alloyed donor morphology are critical for high-performance ternary OSCs.
  • A unified HOMO-level landscape achieved through potential compensation is key to efficient charge generation and maximized photovoltaic performance.
  • This framework provides a pathway for rational engineering of complex multi-component organic solar cells.