Journal ArticleDOI
A graphene quantum dot decorated SrRuO3 mesoporous film as an efficient counter electrode for high-performance dye-sensitized solar cells
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TLDR
In this article, a mesoporous perovskite strontium ruthenate (SrRuO3) counter electrode (CE) for dye-sensitized solar cells (DSSCs) is proposed.Abstract:
Hydrothermally synthesized electrically conductive perovskite strontium ruthenate (SrRuO3) nanoparticles were added into a binder solution and then cast onto fluorine doped tin oxide (FTO) glass to form a mesoporous SrRuO3 counter electrode (CE) for dye-sensitized solar cells (DSSCs). The high porosity and large specific surface area of the SrRuO3 CE allows easier and faster diffusion of electrolyte into the pores and involves more triiodide (I3−) in the redox reaction, thereby resulting in a higher power conversion efficiency (PCE, 7.16%) than that of our published research on sputtered SrRuO3 film CEs (6.48%). Furthermore, graphene quantum dots (GQDs) endowed with excellent intrinsic catalytic activity and high conductivity were decorated onto the SrRuO3 CE by a dipping technique to form a SRO–GQD hybrid. The synergistic effect of SrRuO3 and GQDs contributes to more active catalytic sites as well as faster ion diffusion and electron transfer than a pristine SrRuO3 CE, thereby resulting in increased electrocatalytic ability towards I3− reduction. As a result, our fabricated DSSCs based on the optimized SRO–GQD CE achieve an impressive PCE of 8.05%, much higher than that of the reference device assembled with a conventional platinum (Pt) CE (7.44%). The SRO–GQD CE also exhibits an excellent long-term electrochemical stability in I3−/I− electrolyte. Overall, the SRO–GQD hybrid can be considered as a highly efficient Pt-free CE for practical applications of DSSCs.read more
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Journal ArticleDOI
Electromagnetic Response and Energy Conversion for Functions and Devices in Low‐Dimensional Materials
Mao-Sheng Cao,Xi-Xi Wang,Min Zhang,Jin-Cheng Shu,Wen-Qiang Cao,Hui-Jing Yang,Xiao-Yong Fang,Jie Yuan +7 more
Journal ArticleDOI
Design and fabrication of carbon dots for energy conversion and storage
TL;DR: Three strategies for structural engineering of CDs are presented and analyzed, in terms of the tuning of size and crystallinity, and the methodologies for surface modification and heteroatom doping, with a focus on the relationship among the synthesis methods, structure and properties of the concerned CDs.
Journal ArticleDOI
Continuously prepared highly conductive and stretchable SWNT/MWNT synergistically composited electrospun thermoplastic polyurethane yarns for wearable sensing
Yahong Li,Bing Zhou,Guoqiang Zheng,Xianhu Liu,Tingxi Li,Chao Yan,Chuanbing Cheng,Kun Dai,Chuntai Liu,Changyu Shen,Zhanhu Guo +10 more
TL;DR: In this paper, highly conductive and stretchable yarns based on electrospun thermoplastic polyurethane (TPU) fiber yarns successively decorated with multi-walled carbon nanotubes (MWNTs) and single-weled carbon nanotsubes (SWNTs), were prepared by a combined electrospinning, ultrasonication adsorbing, and bobbin winder technique.
Journal ArticleDOI
Application of graphene in energy storage device – A review
Abdul Ghani Olabi,Abdul Ghani Olabi,Abdul Ghani Olabi,Mohammad Ali Abdelkareem,Mohammad Ali Abdelkareem,Mohammad Ali Abdelkareem,Tabbi Wilberforce,Enas Taha Sayed,Enas Taha Sayed +8 more
TL;DR: In this article, the authors explored the application of graphene in energy storage device, absorbers and electrochemical sensors, and found that these good characteristics of graphene must be extended further and improved to make them suitable for other applications.
Journal ArticleDOI
Biological cell template synthesis of nitrogen-doped porous hollow carbon spheres/MnO2 composites for high-performance asymmetric supercapacitors
Wei Du,Xiaoning Wang,Jie Zhan,Xueqin Sun,Litao Kang,Fuyi Jiang,Xiaoyu Zhang,Qian Shao,Mengyao Dong,Mengyao Dong,Hu Liu,Vignesh Murugadoss,Zhanhu Guo +12 more
TL;DR: In this article, the authors fabricated porous hollow carbon spheres with different morphologies and electrochemical properties using yeast cell templates, and the as-prepared sample exhibited an ultrahigh specific capacitance of 255 F g 1 at a current density 1 A g 1 in 1 M Na2SO4 electrolyte.
References
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Kostya S. Novoselov,Andre K. Geim,Sergey V. Morozov,Da Jiang,Y. Zhang,S. V. Dubonos,Irina V. Grigorieva,A. A. Firsov +7 more
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Journal ArticleDOI
A low-cost, high-efficiency solar cell based on dye-sensitized colloidal TiO2 films
TL;DR: In this article, the authors describe a photovoltaic cell, created from low-to medium-purity materials through low-cost processes, which exhibits a commercially realistic energy-conversion efficiency.
Journal ArticleDOI
Dye-Sensitized Solar Cells
TL;DR: Dye-sensitized solar cells (DSCs) offer the possibilities to design solar cells with a large flexibility in shape, color, and transparency as mentioned in this paper, and many DSC research groups have been established around the world.
Journal Article
Photoelectrochemical cells : Materials for clean energy
TL;DR: In this paper, the authors look into the historical background, and present status and development prospects for photoelectrochemical cells, based on nanocrystalline materials and conducting polymer films.
Journal ArticleDOI
Porphyrin-Sensitized Solar Cells with Cobalt (II/III)–Based Redox Electrolyte Exceed 12 Percent Efficiency
Aswani Yella,Hsuan-Wei Lee,Hoi Nok Tsao,Chenyi Yi,Aravind Kumar Chandiran,Md. K. Nazeeruddin,Eric Wei-Guang Diau,Chen-Yu Yeh,Shaik M. Zakeeruddin,Michael Grätzel +9 more
TL;DR: In this article, a Co(II/III)tris(bipyridyl)-based redox electrolyte was used in conjunction with a custom synthesized donor-π-bridge-acceptor zinc porphyrin dye as sensitizer (designated YD2-o-C8).