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Photoluminescence: Applications

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Photoluminescence offers a wide range of applications due to its inherent sensitivity and selectivity. This technique allows for both direct and indirect analyses of the analyte. Direct quantitative analysis is possible when the analyte exhibits a favorable quantum yield for fluorescence or phosphorescence. However, an indirect analysis may be feasible if the analyte is not fluorescent or phosphorescent, or if the quantum yield is unfavorable. Indirect methods include reacting the analyte with...

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Updated: May 24, 2026

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

Photon management with core-shell nanowire structures.

Kun-Yu Lai¹, Hung-Chih Chang, Yu-An Dai

¹Institute of Photonics and Optoelectronics National Taiwan University, Taipei 10617, Taiwan.

|March 16, 2012

Summary

This summary is machine-generated.

Silicon/oxide core-shell nanowire arrays (NWAs) were developed for enhanced light harvesting. These antireflective structures improve light trapping in photovoltaic devices, boosting potential for nanostructured solar cells.

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Utilization of Plasmonic and Photonic Crystal Nanostructures for Enhanced Micro- and Nanoparticle Manipulation

Utilization of Plasmonic and Photonic Crystal Nanostructures for Enhanced Micro- and Nanoparticle Manipulation

Published on: September 27, 2011

Area of Science:

Materials Science
Nanotechnology
Photovoltaics

Background:

Antireflective coatings are crucial for improving solar cell efficiency.
Nanostructured materials offer unique optical properties for light management.

Purpose of the Study:

To fabricate and characterize antireflective silicon/oxide core-shell nanowire arrays (NWAs).
To investigate the light-harvesting capabilities and potential applications in nanostructured photovoltaic devices.

Main Methods:

Fabrication of Si/oxide core-shell NWAs using galvanic etching and annealing.
Analysis of optical properties including broadband working range, omnidirectionality, and polarization-insensitivity.
Tuning core-shell volume ratios to optimize light trapping.

Main Results:

Demonstrated excellent light-harvesting characteristics of the core-shell NWAs.
Achieved smooth refractive index transition from air to substrate, enhancing light absorption.
Identified enhanced light trapping in planar Si or NWA core regions by tuning volume ratios.
Benefited the geometry design of planar and radial p-n junction solar cells.

Conclusions:

The developed antireflective Si/oxide core-shell NWAs show significant potential for nanostructured photovoltaic applications.
Photon management strategies using these NWAs can enhance light trapping for improved solar energy conversion.
The tunable geometry of NWAs offers a pathway for optimizing solar cell design.