scholarly journals SiNW/C@Pt Arrays for High-Efficiency Counter Electrodes in Dye-Sensitized Solar Cells

Energies ◽  
2019 ◽  
Vol 13 (1) ◽  
pp. 139
Author(s):  
Junhee Kim ◽  
Sanghoon Jung ◽  
Han-Jung Kim ◽  
Yoonkap Kim ◽  
Chanyong Lee ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Solar Cells ◽  
High Efficiency ◽  
Dye Sensitized Solar Cells ◽  
Carbon Shell ◽  
Maximum Efficiency ◽  
Counter Electrodes ◽  
Transfer Resistance ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

Modern energy needs and the pressing issue of environmental sustainability have driven many research groups to focus on energy-generation devices made from novel nanomaterials. We have prepared platinum nanoparticle-decorated silicon nanowire/carbon core–shell nanomaterials (SiNW/C@Pt). The processing steps are relatively simple, including wet chemical etching to form the silicon nanowires (SiNWs), chemical vapor deposition to form the carbon shell, and drop-casting and thermal treatment to embed platinum nanoparticles (Pt NPs). This nanomaterial was then tested as the counter electrode (CE) in dye-sensitized solar cells (DSSCs). SiNW/C@Pt shows potential as a good electrocatalyst based on material characterization data from Raman spectroscopy and X-ray photoelectron spectroscopy (XPS). Raman spectroscopy shows that the surface reactivity of the SiNW/C is increased by the decoration of Pt NPs. These data also show that the carbon shell included both graphitic (sp 2 hybridization) and defective (sp 3 hybridization) phases of carbon. We achieved the minimum charge-transfer resistance of 0.025 Ω · cm 2 and the maximum efficiency of 9.46% with a symmetric dummy cell and DSSC device fabricated from the SiNW/C@Pt CEs, respectively.

scholarly journals Self-Assembly Synthesis of the MoS2/PtCo Alloy Counter Electrodes for High-Efficiency and Stable Low-Cost Dye-Sensitized Solar Cells

Nanomaterials ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 1725 ◽  
Author(s):  
Zhi Zeng ◽  
Dongbo Wang ◽  
Jinzhong Wang ◽  
Shujie Jiao ◽  
Yuewu Huang ◽  
...  
Keyword(s):  
Solar Cells ◽  
Electrocatalytic Activity ◽  
High Efficiency ◽  
Electrochemical Impedance ◽  
Dye Sensitized Solar Cells ◽  
Counter Electrodes ◽  
Transfer Resistance ◽  
Dye Sensitized ◽  
Sensitized Solar Cells ◽  
Ptco Alloy

In this work, MoS2 microspheres/PtCo-alloy nanoparticles (MoS2/PtCo-alloy NPs) were composited via a novel and facile process which MoS2 is functionalized by poly (N-vinyl-2-pyrrolidone) (PVP) and self-assembled with PtCo-alloy NPs. This new composite shows excellent electrocatalytic activity and great potential for dye-sensitized solar cells (DSSCs) as a counter electrode (CE) material. Benefiting from heterostructure and synergistic effects, the MoS2/PtCo-alloy NPs exhibit high electrocatalytic activity, low charge-transfer resistance and stability in the cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) test. Meanwhile, a high power-conversion efficiency (PCE) of 8.46% is achieved in DSSCs with MoS2/PtCo-alloy NP CEs, which are comparable to traditional Pt CEs (8.45%). This novel composite provides a new high-performance, stable and cheap choice for CEs in DSSCs.

scholarly journals Microwave assisted synthesis of MoS2/nitrogen-doped carbon shell–core microspheres for Pt-free dye-sensitized solar cells

RSC Advances ◽  
2017 ◽  
Vol 7 (22) ◽  
pp. 13433-13437 ◽  
Author(s):  
Guang Zhu ◽  
Haifeng Xu ◽  
Hongyan Wang ◽  
Wenqi Wang ◽  
Quanxin Zhang ◽  
...  
Keyword(s):  
Solar Cells ◽  
High Efficiency ◽  
Dye Sensitized Solar Cells ◽  
Carbon Shell ◽  
Microwave Assisted Synthesis ◽  
Counter Electrodes ◽  
Nitrogen Doped ◽  
Dye Sensitized ◽  
Nitrogen Doped Carbon ◽  
Sensitized Solar Cells

Novel MoS2/nitrogen-doped carbon shell–core microsphere counter electrodes of dye-sensitized solar cells with a high efficiency of 6.2%.

Nitrogen-doped carbon microspheres counter electrodes for dye-sensitized solar cells by microwave assisted method

RSC Advances ◽  
2016 ◽  
Vol 6 (63) ◽  
pp. 58064-58068 ◽  
Author(s):  
Guang Zhu ◽  
Hongyan Wang ◽  
Haifeng Xu ◽  
Quanxin Zhang ◽  
Hengchao Sun ◽  
...  
Keyword(s):  
Solar Cells ◽  
High Efficiency ◽  
Dye Sensitized Solar Cells ◽  
Carbon Microspheres ◽  
Counter Electrodes ◽  
Nitrogen Doped ◽  
Dye Sensitized ◽  
Nitrogen Doped Carbon ◽  
Sensitized Solar Cells ◽  
Microwave Assisted Method

Nitrogen-doped carbon microspheres were synthesized for counter electrodes of dye-sensitized solar cells with a high efficiency of 6.28%.

A novel counter electrode material of La0.5Sr0.5CoO3 for dye-sensitized solar cells

2016 ◽  
Vol 09 (01) ◽  
pp. 1650007 ◽  
Author(s):  
Yongfeng Zhong ◽  
Tianze Qin ◽  
Bo Yang ◽  
Xueqin Zuo ◽  
Guang Li ◽  
...  
Keyword(s):  
Solar Cells ◽  
High Efficiency ◽  
Sol Gel ◽  
Dye Sensitized Solar Cells ◽  
Perovskite Oxide ◽  
Counter Electrodes ◽  
Gel Method ◽  
Sol Gel Method ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

In this work, La0.5Sr0.5CoO3 (LSCO) perovskite oxide with perfect crystallinity was successfully synthesized via a sol–gel method and then used as counter electrodes (CEs) for dye-sensitized solar cells (DSSCs). The DSSCs with LSCO CEs exhibited excellent electrocatalytic activity for the triiodide reduction and yielded a power conversion efficiency of 7.17%, which is greater than that of the Pt electrode (7.06%). Compared with the hydrothermal method and solvothermal method, sol–gel method is more suitable for large scale preparation. This work should open up a new class of CE materials for low-cost and high-efficiency DSSCs.

scholarly journals Ultrafast electrochemical preparation of graphene/CoS nanosheet counter electrodes for efficient dye-sensitized solar cells

RSC Advances ◽  
2015 ◽  
Vol 5 (104) ◽  
pp. 85822-85830 ◽  
Author(s):  
Chongyang Zhu ◽  
Huihua Min ◽  
Feng Xu ◽  
Jing Chen ◽  
Hui Dong ◽  
...  
Keyword(s):  
Solar Cells ◽  
High Efficiency ◽  
Dye Sensitized Solar Cells ◽  
Counter Electrodes ◽  
Electrochemical Preparation ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

Utilizing inexpensive, high-efficiency counter electrodes (CEs) to replace the traditional platinum counterparts in dye-sensitized solar cells (DSSCs) is worthwhile.

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