scholarly journals Dually Ordered Porous TiO2-rGO Composites with Controllable Light Absorption Properties for Efficient Solar Energy Conversion

2016 ◽  
Vol 29 (4) ◽  
pp. 1604795 ◽  
Author(s):  
Yu Yang ◽  
Quan Jin ◽  
Dan Mao ◽  
Jian Qi ◽  
Yanze Wei ◽  
...  
Keyword(s):  
Solar Energy ◽  
Energy Conversion ◽  
Light Absorption ◽  
Solar Energy Conversion ◽  
Absorption Properties ◽  
Porous Tio2 ◽  
Ordered Porous

scholarly journals Design of Novel Metal Nanostructures for Broadband Solar Energy Conversion

2015 ◽  
Vol 2015 ◽  
pp. 1-10
Author(s):  
Kristine A. Zhang ◽  
David Ma ◽  
Ying-Chih Pu ◽  
Yat Li
Keyword(s):  
Solar Energy ◽  
Energy Conversion ◽  
Light Absorption ◽  
Alternative Energy ◽  
High Efficiency ◽  
Solar Spectrum ◽  
Solar Energy Conversion ◽  
Cost Effective ◽  
Simulation Method ◽  
Metal Nanostructures

Solar power holds great potential as an alternative energy source, but current photovoltaic cells have much room for improvement in cost and efficiency. Our objective was to develop metal nanostructures whose surface plasmon resonance (SPR) spectra closely match the solar spectrum to enhance light absorption and scattering. We employed the finite-difference time-domain simulation method to evaluate the effect of varying key parameters. A novel nanostructure with SPR absorption matching a region of the solar spectrum (300 to 1500 nm) that contains 90% of solar energy was successfully designed. This structure consists of a large gold-silica core-shell structure with smaller gold nanoparticles and nanorods on its surface. Such complex nanostructures are promising for broad and tunable absorption spectra. In addition, we investigated the SPR of silver nanoparticle arrays, which can achieve scattering close to the solar spectrum. We demonstrated an improvement in efficiency of over 30% with optimal nanoparticle radius and periods of 75 nm and 325 nm, respectively. In combination, our studies enable high-efficiency, tunable, and cost-effective enhancement of both light absorption and scattering, which has potential applications in solar energy conversion as well as biomedical imaging.

Integrating photosystem II into a porous TiO2 nanotube network toward highly efficient photo-bioelectrochemical cells

2016 ◽  
Vol 4 (31) ◽  
pp. 12197-12204 ◽  
Author(s):  
Jiao Li ◽  
Xiyun Feng ◽  
Jinbo Fei ◽  
Peng Cai ◽  
Jianguo Huang ◽  
...  
Keyword(s):  
Photosystem Ii ◽  
Solar Energy ◽  
Energy Conversion ◽  
Electrical Power ◽  
Solar Energy Conversion ◽  
Tio2 Nanotube ◽  
Porous Tio2 ◽  
Highly Efficient

A photosystem II-based photoanode coupled with a porous TiO2 nanotube network is constructed for solar energy conversion into electrical power.

Modulation of Band Gaps of Codoping GaN: A First Principles Study

2011 ◽  
Vol 287-290 ◽  
pp. 306-312
Author(s):  
Jing Wang ◽  
Ru Zhi Wang ◽  
Li Chun Xu ◽  
Hui Yan
Keyword(s):  
Solar Energy ◽  
Energy Conversion ◽  
Band Gap ◽  
Light Absorption ◽  
First Principles ◽  
Solar Energy Conversion ◽  
Visible Spectral Region ◽  
Intermediate Band ◽  
Band Gap Narrowing ◽  
Immense Potential

To improve the solar energy conversion of GaN for photocatalytic, the band gap of GaN should be tailored to match with visible light absorption, we calculated that Cr/C codoping effectively narrows the band gap of GaN by using first-principles calculations. Cr/C codoping can split the band gap with the formation of an intermediate band. Positive defect pair binding energy indicates that the defect pairs are stable with respect to the isolate impurity in the sample. The band gap narrowing can be optimized to shift light absorption into the peak of the visible spectral region , which enable maximal utilization of sunlight and thus offer immense potential for applications in solar energy conversion.

Enabling efficient visible light photocatalytic water splitting over SrTaO2N by incorporating Sr in its B site

2018 ◽  
Vol 6 (42) ◽  
pp. 20760-20768 ◽  
Author(s):  
Xiaoqin Sun ◽  
Fangfang Wu ◽  
Gang Liu ◽  
Xiaoxiang Xu
Keyword(s):  
Photocatalytic Activity ◽  
Solar Energy ◽  
Visible Light ◽  
Energy Conversion ◽  
Water Splitting ◽  
Light Absorption ◽  
Solar Energy Conversion ◽  
Visible Light Absorption ◽  
Photocatalytic Water Splitting ◽  
Visible Light Photocatalytic

The perovskite oxynitride SrTaO2N is a promising compound for solar energy conversion because it has strong visible light absorption at wavelengths as long as 650 nm. However, the photocatalytic activity of SrTaO2N is generally very poor. We managed to improve its activity by incorporating Sr in its B site.

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