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P-N junction

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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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

Panchromatic Sequentially Cast Ternary Polymer Solar Cells.

Masoud Ghasemi¹, Long Ye¹, Qianqian Zhang²

¹Department of Physics and ORaCEL, North Carolina State University, Raleigh, NC, 27695, USA.

Advanced Materials (Deerfield Beach, Fla.)

|November 30, 2016

Summary

A new sequential-casting method creates stratified bulk heterojunction solar cells by spin casting layers sequentially. This technique is ideal for polymer blends with high miscibility, simplifying solar cell fabrication.

Keywords:

mechanical alloys miscibility polymer solar cells sequential casting ternary blends

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Morphology Control for Fully Printable Organic–Inorganic Bulk-heterojunction Solar Cells Based on a Ti-alkoxide and Semiconducting Polymer

Morphology Control for Fully Printable Organic–Inorganic Bulk-heterojunction Solar Cells Based on a Ti-alkoxide and Semiconducting Polymer

Published on: January 10, 2017

Area of Science:

Materials Science
Organic Electronics
Photovoltaics

Background:

Bulk heterojunction (BHJ) solar cells are a promising photovoltaic technology.
Achieving stratified morphology in BHJ layers is crucial for efficient charge separation and transport.
Current methods for creating stratified BHJ structures can be complex, often requiring intermediate electrodes or orthogonal solvents.

Purpose of the Study:

To develop a simplified method for fabricating stratified bulk heterojunction (BHJ) solar cells.
To demonstrate the utility of this method for polymer systems prone to mechanical alloying.

Main Methods:

A sequential-casting ternary method was developed.
Two BHJ layers were spin cast sequentially.
The process avoided the need for a middle electrode and orthogonal solvents.

Main Results:

Stratified BHJ solar cells were successfully created using the sequential-casting method.
The method proved effective for polymers exhibiting high miscibility and forming mechanically alloyed morphologies.
Elimination of intermediate electrodes and orthogonal solvents simplifies the fabrication process.

Conclusions:

The sequential-casting ternary method offers a facile approach to fabricating stratified BHJ solar cells.
This method is particularly advantageous for processing polymer blends with high miscibility.
The developed technique has the potential to streamline the manufacturing of efficient organic solar cells.