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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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Updated: May 20, 2026

Harvesting Solar Energy by Means of Charge-Separating Nanocrystals and Their Solids

Harvesting Solar Energy by Means of Charge-Separating Nanocrystals and Their Solids

Published on: August 23, 2012

Screening-engineered field-effect solar cells.

William Regan¹, Steven Byrnes, Will Gannett

¹Department of Physics, University of California at Berkeley, Berkeley, California 94720, USA.

|July 18, 2012

Summary

This summary is machine-generated.

A new photovoltaic architecture, screening-engineered field-effect photovoltaics (SFPV), offers a path to low-cost, high-efficiency solar energy. This technology enables the use of diverse semiconductor materials, overcoming previous limitations in solar cell development.

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Area of Science:

Materials Science
Renewable Energy Engineering
Semiconductor Physics

Background:

Photovoltaics (PV) are crucial for clean energy but face a cost-efficiency trade-off.
Current PV technologies are limited by material choices and fabrication complexities.
Widespread implementation of solar energy is hindered by these challenges.

Purpose of the Study:

To introduce a novel photovoltaic architecture: screening-engineered field-effect photovoltaics (SFPV).
To demonstrate SFPV's potential for fabricating low-cost, high-efficiency PV devices.
To enable the use of a wider range of semiconductor materials in PV.

Main Methods:

Development of the SFPV architecture.
Theoretical modeling and simulation of SFPV performance.
Fabrication and testing of prototype SFPV devices.

Main Results:

The SFPV architecture allows for the use of diverse semiconductor materials, including challenging metal oxides, sulfides, and phosphides.
Prototype SFPV devices demonstrated successful operation.
Experimental results align with theoretical model predictions for SFPV performance.

Conclusions:

Screening-engineered field-effect photovoltaics (SFPV) present a viable solution to the cost-efficiency trade-off in PV technology.
SFPV technology can significantly broaden the range of usable semiconductors for solar energy applications.
This advancement holds promise for accelerating the adoption of efficient and affordable solar power.