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

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Published on: August 23, 2012

Efficient Multiterminal Spectrum Splitting via a Nanowire Array Solar Cell.

Alexander Dorodnyy¹, Esther Alarcon-Lladó², Valery Shklover³

¹Institute of Electromagnetic Fields, ETH Zurich , 8092 Zurich, Switzerland.

|February 16, 2016

Summary

This summary is machine-generated.

This study proposes a novel multiterminal nanowire solar cell design using III-V materials on silicon, achieving a theoretical 48.3% conversion efficiency. This approach enhances solar energy conversion for future applications.

Keywords:

nanowire photonic crystals photovoltaics spectrum splitting

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Area of Science:

Materials Science
Renewable Energy
Nanotechnology

Background:

Nanowire-based solar cells offer improved efficiency and material utilization by integrating III-V materials onto silicon.
Current designs face challenges in optimizing spectrum splitting and fabrication.

Purpose of the Study:

To propose a novel multiterminal nanowire solar cell design for enhanced conversion efficiency.
To explore lateral spectrum splitting using diverse III-V materials on silicon substrates.
To present a fabrication-compatible contacting scheme for next-generation solar cells.

Main Methods:

Theoretical modeling of a multiterminal nanowire solar cell with lateral spectrum splitting.
Utilizing three different III-V material nanowire arrays on a silicon substrate.
Optimizing geometric parameters and absorption cross-section for enhanced performance.
Proposing a multiterminal contacting scheme compatible with CMOS technology.

Main Results:

A theoretical conversion efficiency of 48.3% was predicted for the proposed design.
Efficient lateral spectrum splitting was achieved by selecting appropriate III-V materials.
Enhanced absorption due to standing nanowires and optimized geometry contributes to high efficiency.
A viable contacting scheme suitable for standard CMOS fabrication was developed.

Conclusions:

The proposed multiterminal nanowire solar cell design demonstrates significant potential for high-efficiency solar energy conversion.
Lateral spectrum splitting using III-V materials on silicon offers a promising route for next-generation photovoltaics.
The developed concepts are applicable to both terrestrial and space-based solar energy applications.