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Updated: May 7, 2026

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

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Published on: August 23, 2012

A Metastructure Based on Amorphous Carbon for High Efficiency and Selective Solar Absorption.

Junli Su^1,2, Gang Chen¹, Chong Ma¹

¹Shanghai Key Laboratory of Optical Coatings and Spectral Modulation, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai 200083, China.

Nanomaterials (Basel, Switzerland)

|April 12, 2024

Summary

Researchers developed a novel amorphous carbon (a-C) metamaterial absorber for enhanced solar energy conversion. This selective absorber achieves high efficiency across UV, visible, and near-infrared light, crucial for renewable energy applications.

Keywords:

amorphous carbon broadband absorption cermet nanocomposite material quasi-resonant cavities solar energy

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Last Updated: May 7, 2026

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Published on: November 5, 2014

Area of Science:

Materials Science
Renewable Energy Engineering
Nanotechnology

Background:

Efficient solar thermal conversion is vital for renewable energy technologies like solar thermal power generation, solar thermophotovoltaics, and seawater desalination.
A key requirement for maximizing solar energy conversion efficiency is a solar selective absorber with precisely tailored optical properties.

Purpose of the Study:

To propose and investigate a broadband selective absorber based on amorphous carbon (a-C) metamaterials.
To enhance light absorption across the ultraviolet (UV), visible (Vis), and near-infrared (NIR) spectral ranges for improved solar energy utilization.

Main Methods:

Fabrication of a broadband selective absorber using amorphous carbon (a-C) metamaterials.
Incorporation of Ti@a-C thin film into the nanostructure to modulate optical properties and enhance NIR absorption.
Characterization of optical properties, solar absorptivity, and photothermal conversion efficiency.

Main Results:

The proposed a-C metamaterial absorber demonstrated high absorption across UV, Vis, and NIR spectral ranges.
The Ti@a-C thin film significantly enhanced light absorption, particularly in the NIR band.
Achieved impressive solar absorptivity of 97.8% and photothermal conversion efficiency of 95.6%.
The absorber maintained superior performance even at large incident angles and with different polarized states.

Conclusions:

The developed amorphous carbon metamaterial serves as an effective broadband selective absorber for solar energy harvesting.
Metal doping, specifically Ti@a-C, offers a viable strategy to tune optical properties and boost NIR absorption.
These findings present new opportunities for amorphous carbon matrix materials in solar energy applications.