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Related Experiment Video

Updated: May 24, 2026

Indoor Experimental Assessment of the Efficiency and Irradiance Spot of the Achromatic Doublet on Glass (ADG) Fresnel Lens for Concentrating Photovoltaics

Indoor Experimental Assessment of the Efficiency and Irradiance Spot of the Achromatic Doublet on Glass (ADG) Fresnel Lens for Concentrating Photovoltaics

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Reactive self-tracking solar concentrators: concept, design, and initial materials characterization.

Katherine A Baker¹, Jason H Karp, Eric J Tremblay

¹Department of Electrical and Computer Engineering, University of California, San Diego, La Jolla, California 92093, USA. kabaker@ucsd.edu

|March 14, 2012

Summary

This summary is machine-generated.

This study introduces a novel solar concentrator using nonlinear optical materials to relax stringent tracking needs for high-concentration photovoltaics. This innovation simplifies solar energy systems by reducing mechanical complexity.

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Area of Science:

Optics
Materials Science
Renewable Energy

Background:

High-concentration photovoltaic (HCPV) systems require precise two-axis mechanical tracking due to limited angular acceptance.
This mechanical complexity increases cost and maintenance for solar energy systems.

Purpose of the Study:

To investigate a planar micro-optic solar concentrator with nonlinear optical cladding to reduce mechanical tracking requirements for HCPV systems.
To quantify the optical response needed for effective solar concentration with reduced tracking.

Main Methods:

Optical system design to determine the necessary refractive index change (large, slow, localized).
Proposed a candidate material system: high-index particles in a low-index fluid with a space-charge field.
Preliminary experimental demonstration using aqueous polystyrene nanoparticles.

Main Results:

Demonstrated a voltage-controlled change in the refractive index of nanoparticle suspensions.
Implied potential for larger index changes with optimized nanofluidic materials.

Conclusions:

A nonlinear optical response in waveguide cladding can significantly reduce mechanical tracking demands for HCPV systems.
Nanofluidic materials offer a promising route for developing solar concentrators with adaptable optical properties.