Enhancing the quasi-theoretical photocurrent density of ZnO nanorods via a lukewarm hydrothermal method

Nanoscale ◽  
2020 ◽  
Vol 12 (23) ◽  
pp. 12292-12299
Author(s):  
Ying-Chu Chen ◽  
Zhi-Jie Wu ◽  
Yu-Kuei Hsu
Keyword(s):  
Hydrothermal Method ◽  
Water Splitting ◽  
Light Harvesting ◽  
Zno Nanorods ◽  
Photocurrent Density ◽  
Photoelectrochemical Water Splitting ◽  
Harvesting Efficiency ◽  
Light Harvesting Efficiency

Anti-reflection enhanced the light harvesting efficiency of a ∼10-μm-long 1D ZnO NRA, which is evidently manifested in the quasi-theoretical photocurrent density that reached ∼0.9 mA cm−2 for solar photoelectrochemical water splitting.

scholarly journals Enhanced Light Harvesting in Dye-Sensitized Solar Cell Using External Lightguide

2011 ◽  
Vol 2011 ◽  
pp. 1-6 ◽  
Author(s):  
Chi-Hui Chien ◽  
Ming-Lang Tsai ◽  
Chi-Chang Hsieh ◽  
Yan-Huei Li
Keyword(s):  
Light Harvesting ◽  
Power Conversion ◽  
Dye Sensitized Solar Cells ◽  
Experimental Tests ◽  
Photocurrent Density ◽  
Dye Sensitized Solar Cell ◽  
Dye Sensitized ◽  
Harvesting Efficiency ◽  
Light Harvesting Efficiency ◽  
Sensitized Solar Cells

An external lightguide (EL) for enhancing the light-harvesting efficiency of dye-sensitized solar cells (DSSCs) was designed and developed. The EL attached to the exterior of a DSSC photoelectrode directed light on a dye-covered nanoporous TiO2film (D-NTF) of the photoelectrode. Experimental tests confirmed that the EL increased the light-harvesting efficiency of a DSSC with an active area of 0.25 cm2by 30.69%. Photocurrent density and the power conversion efficiency were also increased by 38.12% and 25.09%, respectively.

scholarly journals SWCNT photocathodes sensitised with InP/ZnS core–shell nanocrystals

2016 ◽  
Vol 4 (16) ◽  
pp. 3379-3384 ◽  
Author(s):  
Thomas J. Macdonald ◽  
Daniel D. Tune ◽  
Melissa R. Dewi ◽  
Joseph C. Bear ◽  
Paul D. McNaughter ◽  
...  
Keyword(s):  
Light Harvesting ◽  
Core Shell ◽  
The Future ◽  
Harvesting Efficiency ◽  
Light Harvesting Efficiency

Increasing the light harvesting efficiency of photocathodes is an integral part of optimising the future efficiencies of solar technologies.

Performance of TiO2 Aggregates-Based Dye Solar Cells

2013 ◽  
Vol 737 ◽  
pp. 137-144 ◽  
Author(s):  
Norani Muti Mohamed ◽  
Siti Nur Azella Zaine
Keyword(s):  
Solar Cells ◽  
Light Scattering ◽  
Water Content ◽  
Calcination Temperature ◽  
Conversion Efficiency ◽  
Light Harvesting ◽  
Dye Solar Cells ◽  
Harvesting Efficiency ◽  
Light Harvesting Efficiency ◽  
20 Nm

TiO2 aggregates-based dye solar cells (DSCs) have gained an increasing interest due to their better light harvesting efficiency as a result of enhanced light scattering effect from the submicron spherical aggregates that can generate more electrons and the high internal surface area for dye chemisorption provided by nanocrystallites which made up the aggregates. Optimized TiO2 aggregates (0.45 µm) composing of nanocrystallites (10-40 nm) with desired physicochemical properties for enhanced overall light conversion efficiency of DSC were synthesized by varying the calcination temperature and water content in the hydrolysis of titanium alkoxide in ethanol. TiO2 aggregates obtained were characterized using FESEM, XRD and UV-Vis spectroscopy. The assembled DSCs were then evaluated using solar simulator under AM 1.5 (100 mW/cm2) simulated sunlight. Nanocrystallites were found to have an increasing size of 12 nm to 36 nm with increasing calcination temperature of 400C to 600C. Sample of aggregates calcined at 500C recorded the highest efficiency (4.456%) as the 20-nm nanocrystallites produced is considered to be the optimum size for dye absorption. With higher water content in the hydrolysis process, the aggregates lose their spherical shapes resulting in lower absorption intensity indicating the occurrence of low light scattering in the TiO2 film. Highest conversion efficiency was observed for DSC that used well-defined spherical TiO2 aggregates composing of 20-nm nanocrystallites which were synthesized using ethanol with low water content (0.9 vol%) followed by calcination at 500C. Thus, optimized TiO2 nanocrystallites which form spherical aggregate is critical in order to improve light harvesting efficiency of DSCs.

Bismuth silicate photocatalysts with enhanced light harvesting efficiency by photonic crystal

2019 ◽  
Vol 810 ◽  
pp. 151839 ◽  
Author(s):  
Yuanting Wu ◽  
Jian Lu ◽  
Menglong Li ◽  
Jun Yuan ◽  
Penghong Wu ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Light Harvesting ◽  
Bismuth Silicate ◽  
Harvesting Efficiency ◽  
Light Harvesting Efficiency
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