A ruthenium complex as a single-component redox shuttle for electrochemical photovoltaics

2015 ◽  
Vol 51 (36) ◽  
pp. 7745-7748 ◽  
Author(s):  
Jeung Yoon Kim ◽  
Won Seok Yun ◽  
Ho-Jin Son ◽  
JaeDong Lee ◽  
Nak Cheon Jeong
Keyword(s):  
Low Power ◽  
Energy Conversion ◽  
Conversion Efficiency ◽  
Ruthenium Complex ◽  
Energy Conversion Efficiency ◽  
Illumination Level ◽  
Single Component ◽  
Large Enhancement ◽  
Redox Shuttle

A new conceptual “single-component redox shuttle” led to a large enhancement of VOC (∼940 mV) and also greatly boosted the energy conversion efficiency under low-power illumination level by a factor of ca. 5.6.

Enhanced Energy Conversion Efficiency of La3+-Modified Nanoporous TiO2Electrode Sensitized with a Ruthenium Complex

2008 ◽  
Vol 26 (10) ◽  
pp. 1939-1943 ◽  
Author(s):  
Xiao-Hong WU ◽  
Song WANG ◽  
Yun GUO ◽  
Zhao-Yang XIE ◽  
Lu HAN ◽  
...  
Keyword(s):  
Energy Conversion ◽  
Conversion Efficiency ◽  
Ruthenium Complex ◽  
Energy Conversion Efficiency

Improving the Energy Conversion Efficiency of a Savonius Rotor Using Automatic Valves

2019 ◽  
Vol 141 (3) ◽  
Author(s):  
M. Amiri ◽  
M. Anbarsooz
Keyword(s):  
Low Power ◽  
Energy Conversion ◽  
Conversion Efficiency ◽  
Energy Conversion Efficiency ◽  
Maximum Power ◽  
Power Coefficient ◽  
Speed Ratio ◽  
Tip Speed Ratio ◽  
Savonius Rotor ◽  
Rotor Axis

Savonius wind turbines are popular for their easy fabrication and high starting capabilities. Nevertheless, they suffer from low power coefficients, which are mainly due to a negative torque resulting from the blade moving against the upcoming wind. Numerous methods have been proposed to alleviate the negative torque, among them are modified blade profiles (twisted blades), adding flow deflectors, and valve-aided blades. In this study, the effects of adding automatic valves to a two-bladed Savonius rotor on its energy conversion efficiency are investigated numerically and experimentally. The valves are placed at three different positions: close to the rotor axis, at the blade center, and at the tip of the rotor. Results show that although adding valves can decrease the negative torque of the returning blade, they can also lead to a considerable reduction in the positive torque of the advancing blade. For the rotors in the current study, the maximum power coefficient is increased 20.8% when the valves are at the tip of the blades, while the two other cases have decreased the power coefficient of the rotor. Adding the valves to the blades does not change the tip speed ratio corresponding to the maximum power coefficient of the rotor.

First-principles study on the electronic and optical properties of the orthorhombic CsPbBr3 and CsPbI3 with Cmcm space group

2021 ◽  
Author(s):  
Xianhao Zhao ◽  
Tianyu Tang ◽  
Quan Xie ◽  
like gao ◽  
Limin Lu ◽  
...  
Keyword(s):  
Optical Properties ◽  
Solar Cells ◽  
Energy Conversion ◽  
Conversion Efficiency ◽  
First Principles ◽  
Energy Conversion Efficiency ◽  
Space Group ◽  
Absorbing Materials ◽  
Halide Perovskites ◽  
Lead Halide

The cesium lead halide perovskites are regarded as effective candidates for light-absorbing materials in solar cells, which have shown excellent performances in experiments such as promising energy conversion efficiency. In...

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