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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

High efficiency all-polymer tandem solar cells.

Jianyu Yuan¹, Jinan Gu¹, Guozheng Shi¹

¹Institute of Functional Nano &Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials &Devices, Soochow University, 199 Ren'ai Road, Suzhou, 215123, Jiangsu, PR China.

Scientific Reports

|May 27, 2016

Summary

Researchers developed an efficient all-polymer tandem solar cell achieving a 6.70% power conversion efficiency (PCE). This novel tandem structure significantly boosts performance compared to single-junction cells.

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Area of Science:

Materials Science
Organic Electronics
Photovoltaics

Background:

All-polymer solar cells offer flexibility and low-cost manufacturing potential.
Tandem solar cells enhance light absorption and efficiency by stacking multiple active layers.

Purpose of the Study:

To develop an efficient all-polymer tandem solar cell using identical sub-cells.
To investigate the performance enhancement achieved through a tandem architecture.

Main Methods:

Fabrication of an all-polymer tandem solar cell utilizing P2F-DO:N2200 material in identical sub-cells.
Optimization of the recombination layer and sub-cell film thickness for efficient carrier collection.

Main Results:

Achieved a power conversion efficiency (PCE) of 6.70%, a significant increase over single-junction cells.
Demonstrated enhanced light absorption in the tandem configuration.
Maintained efficient carrier collection through optimized device parameters.

Conclusions:

The all-polymer tandem solar cell architecture is an effective strategy for boosting the performance of polymer solar cells.
This approach offers a viable pathway for developing high-efficiency, low-cost organic photovoltaic devices.