Balance between the charge transfer resistance and diffusion impedance in a CNT/Pt counter electrode for highly efficient liquid-junction photovoltaic devices

2018 ◽  
Vol 58 ◽  
pp. 159-166 ◽  
Author(s):  
Van-Duong Dao ◽  
Ho-Suk Choi
Keyword(s):  
Charge Transfer ◽  
Counter Electrode ◽  
Charge Transfer Resistance ◽  
Photovoltaic Devices ◽  
Liquid Junction ◽  
Transfer Resistance ◽  
Highly Efficient ◽  
Diffusion Impedance ◽  
And Diffusion

Cobalt oxide enhanced lanthanum strontium cobalt ferrite electrode for solid oxide fuel cells

2021 ◽  
pp. 1-13
Author(s):  
Alberto Olivo ◽  
Berceste Beyribey ◽  
Hwan Kim ◽  
Joshua Persky
Keyword(s):  
Charge Transfer ◽  
Solid Oxide Fuel Cells ◽  
Charge Transfer Resistance ◽  
Solid Oxide ◽  
Co3o4 Nanoparticles ◽  
Incipient Wetness Impregnation ◽  
Impregnation Method ◽  
Oxide Fuel ◽  
Transfer Resistance ◽  
And Diffusion

A Co3O4 enhanced La0.8Sr0.2Co0.5Fe0.5O3 - δ (LSCF) electrode is developed for use in air electrodes with proton conducting solid oxide fuel cell (SOFC). The incipient wetness impregnation method enables Co3O4 nanoparticles on the LSCF surface without altering the bulk porosity of the LSCF electrode. The polarization resistance of LSCF electrodes is significantly reduced by Co3O4 doping, and both charge transfer and diffusion/conversion resistances were positively affected. The highest reduction in charge transfer resistance is obtained at 700 °C, which is increased from 21%to 32%through reduction of po 2. Conversely, the highest reduction in diffusion/conversion resistance is achieved at 550 °C. By increasing po 2, the reduction is increased from 57%to 66%and its activation energy is reduced up to 33 %compared to pure LSCF. The lowest total area specific resistances obtained under air are 1.45 Ω·cm2, 2.95 Ω·cm2, 6.75 Ω·cm2 and 16.45 Ω·cm2 at 700 °C, 650 °C, 600 °C and 550 °C, respectively.

scholarly journals Balance between the explored Pt counter electrode in an electrolyte medium and the photoanode for highly efficient liquid-junction photovoltaic devices

2020 ◽  
Vol 5 (2) ◽  
pp. 180-184
Author(s):  
Hai-Linh Thi Dang ◽  
Van-Duong Dao ◽  
Ngoc Hung Vu ◽  
Dang Viet Quang ◽  
Hong Ha Thi Vu ◽  
...  
Keyword(s):  
Counter Electrode ◽  
Photovoltaic Devices ◽  
Liquid Junction ◽  
Highly Efficient

scholarly journals Copper Sulfide Catalyzed Porous Fluorine-Doped Tin Oxide Counter Electrode for Quantum Dot-Sensitized Solar Cells with High Fill Factor

2017 ◽  
Vol 2017 ◽  
pp. 1-9 ◽  
Author(s):  
Satoshi Koyasu ◽  
Daiki Atarashi ◽  
Etsuo Sakai ◽  
Masahiro Miyauchi
Keyword(s):  
Charge Transfer ◽  
Solar Cell ◽  
Quantum Dot ◽  
Tin Oxide ◽  
Counter Electrode ◽  
Fill Factor ◽  
Charge Transfer Resistance ◽  
Transfer Resistance ◽  
Sensitized Solar Cells ◽  
Large Charge

The performance of quantum dot-sensitized solar cell (QDSSC) is mainly limited by chemical reactions at the interface of the counter electrode. Generally, the fill factor (FF) of QDSSCs is very low because of large charge transfer resistance at the interface between the counter electrode and electrolyte solution containing redox couples. In the present research, we demonstrate the improvement of the resistance by optimization of surface area and amount of catalyst of the counter electrode. A facile chemical synthesis was used to fabricate a composite counter electrode consisting of fluorine-doped tin oxide (FTO) powder and CuS nanoparticles. The introduction of a sputtered gold layer at the interface of the porous-FTO layer and underlying glass substrate also markedly reduced the resistance of the counter electrode. As a result, we could reduce the charge transfer resistance and the series resistance, which were 2.5 [Ω] and 6.0 [Ω], respectively. This solar cell device, which was fabricated with the presently designed porous-FTO counter electrode as the cathode and a PbS-modified electrode as the photoanode, exhibited a FF of 58%, which is the highest among PbS-based QDSSCs reported to date.

FeSn alloy/graphene as an electrocatalyst for the counter electrode of highly efficient liquid-junction photovoltaic devices

2018 ◽  
Vol 754 ◽  
pp. 139-146 ◽  
Author(s):  
Hyo-Jun Oh ◽  
Van-Duong Dao ◽  
Kyung-Hwan Ryu ◽  
Jae-Hak Lee ◽  
Ho-Suk Choi
Keyword(s):  
Counter Electrode ◽  
Photovoltaic Devices ◽  
Liquid Junction ◽  
Highly Efficient

Keggin-type polyoxometalate/thiospinel octahedron heterostructures for photoelectronic devices

2020 ◽  
Vol 7 (14) ◽  
pp. 2621-2628
Author(s):  
Peng He ◽  
Xiaohong Li ◽  
Ting Wang ◽  
Weichao Chen ◽  
Hong Zhang ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Active Site ◽  
Charge Transfer Resistance ◽  
Transfer Resistance ◽  
Highly Efficient ◽  
Keggin Type ◽  
Low Charge ◽  
Further Development

Keggin-type polyoxometalate CoW12/CoIn2S4 thiospinel heterostructures promote the further development in photoelectronic devices due to highly efficient electrocatalytic triiodide reduction, low charge-transfer resistance, and the high amount of exposed active site.

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