High-performance dye-sensitized solar cells using edge-halogenated graphene nanoplatelets as counter electrodes

Jeon, In‐Yup; Kim, Hong Mo; Choi, In Taek; lim, kyu sang; Ko, Jaejung; Kim, Jae Cheon; Choi, Hyun‐Jung; Ju, Myung Jong; Lee, Jae‐Joon; Kim, Hwan Kyu; Baek, Jong‐Beom

doi:10.1016/j.nanoen.2015.02.037

Cited by 86 publications

(43 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The first semicircle at high frequency was assigned to the charge transfer at the interface between the electrode and the electrolyte, whereas the second semicircle at low frequency was primarily associated with the Nernst diffusion of I 3 − within the electrolyte. 40,41 CdS nanorod/RGO exhibited lower R ct (5.16 cm −2 ) than CdS nanoparticle/RGO (R ct = 6.59 cm −2 ), the similar comparison happens to the comparison between pure CdS nanorod (R ct = 36.60 cm −2 ) and CdS nanoparticle (R ct = 102.90 cm −2 ). On the other hand, the introduction of graphene induces an obvious improvement in the charge transfer and electrocatalytic activity, which can be directly reflected by the comparison of first arc between CdS nanoparticle/RGO, CdS nanoparticle and CdS nanoparticle, CdS nanorod.…”

Section: Resultssupporting

confidence: 66%

The Morphology–Property Effect and Synergetic Catalytic Effect of CdS as Electrocatalysts for Dye-Sensitized Solar Cells

Yang

Tian

Zhang

et al. 2018

ECS J. Solid State Sci. Technol.

View full text Add to dashboard Cite

In this report, CdS nanoparticle, CdS nanorod, CdS nanorod grown on reduced graphene oxide (CdS nanorod/RGO) and CdS nanoparticle grown on reduced graphene oxide (CdS nanoparticle/RGO) have been synthesized by facile solvothermal method. In order to investigate the morphology-property effect and synergetic catalytic effect of CdS, the electrocatalytic property of four CdS samples are measured as counter electrodes (CEs) of dye-sensitized solar cells (DSSCs). The better catalytic activity and electrical conductivity of CdS nanorod than CdS nanoparticle revealed the morphology-property effect. In addition, CdS/RGO composites exhibited much higher power conversion efficiency (PCE) than pure CdS, demonstrating the synergetic catalytic effect between CdS and RGO. Simultaneously, the PCE value (7.19%) of CdS nanorod/RGO is highest among four CdS samples, which is even comparable to the conventional platinum CE (7.30%). Dye-sensitized solar cells (DSSCs) have attracted tremendous attention in the past two decades, 1,2 due to their high efficiency, lowcost fabrication and environmentally-friendly feature. 3,4 As the crucial component of DSSCs, counter electrode (CE) is in charge of transferring electron and catalyzing the reduction of I 3 − to I − . 5,6 Aiming to reach high performance, CE materials should possess a low sheet resistance, good chemical stability and high catalytic activity toward the CE reduction reaction. 7,8 Platinum (Pt), the conventional CE material, has remarkably high conductivity and efficiently catalyzes the reduction of I 3 − to I − . 9 However, large-scale commercial application of Pt CE in DSSCs is seriously hindered by the high cost and low abundance of Pt. 10,11 In addition, iodine-based electrolyte can easily corrode Pt to PtI 4 and H 2 PtI 6 , worsening the CE performance and raising the cost of DSSC. 12,13 In this regard, it is highly necessary to develop Pt-free and low-cost CE materials with high catalytic activity, electrical conductivity and good chemical stability. 14,15 Among the various CE materials, due to the outstanding charge transfer and catalytic activity, transition metal chalcogenides (TMCs) have presented good electrocatalytic performance for the triiodide reduction and can be a potential material as CEs. [16][17][18] The distinctive electronegativity, valence bond, as well as outer electrons of metal and chalcogens resulted in the specific catalytic activity and electrical conductivity of TMCs. 19 Tang's group has reported that metal selenide alloy CEs highlighted their potential application in robust bifacial DSSCs. [20][21][22] Recently, our previous work has demonstrated the superior catalytic activity, high chemical stability and excellent power conversion efficiency of Bi 2 S 3 , NiSe 2 , Ni 0.85 Se, NiSe-Ni 3 Se 2 , and In 2 S 3 , in addition, we also investigated their morphology-property effect and synergetic catalytic effect in DSSC system. 19,[23][24][25][26][27][28] Cadmium sulfide (CdS), an important TMCs with a bandgap (E g ) of 2.42 eV, has drawn enormous at...

show abstract

Section: Resultssupporting

confidence: 66%

The Morphology–Property Effect and Synergetic Catalytic Effect of CdS as Electrocatalysts for Dye-Sensitized Solar Cells

Yang

Tian

Zhang

et al. 2018

ECS J. Solid State Sci. Technol.

View full text Add to dashboard Cite

show abstract

“…A C C E P T E D ACCEPTED MANUSCRIPT 5 It is generally recognized that graphene-based hybrid nano-materials with the sandwich-like structure can not only provide abundant internal interconnecting porous structure, but also make full use of the excellent characteristics of graphene [40], such as superior conductivity and high specific surface area. Herein, we report a simple one-step solvothermal process for synthesis of the sandwich-like structure cobalt disulfide/reduced graphene oxide (CoS 2 /RGO) composite, in which CoS 2 particles have uniform octahedral morphologies simultaneously.…”

Section: A N U S C R I P Tmentioning

confidence: 99%

“…Simply, 1 g of pristine graphite powder, 23 mL of concentrated sulfuric acid and 0.5 g of sodium nitrate were added into 500 mL flask and stirred at less than 5 …”

Section: 2preparation Of Graphene Oxidementioning

confidence: 99%

Sandwich-like octahedral cobalt disulfide/reduced graphene oxide as an efficient Pt-free electrocatalyst for high-performance dye-sensitized solar cells

Yuan

Liu

Jiao

et al. 2017

Carbon

View full text Add to dashboard Cite

“…68 Furthermore, the edge-halogenated graphene nanoplatelets (XGnPs, X = I, Br, Cl) synthesized through ball milling of graphite in the presence of halogen gases displayed a PCE of 10.31%, which was much higher than that of Pt-based DSSCs (9.92%). 66 Clearly, enormous progress has been achieved in the last 10 years from 2009 to 2019, as also evidenced by a new two-volume book 69 as well as an Advanced Materials Special Issue commemorating the 10th anniversary of the discovery of the first C-MFEC 70…”

Section: Designing Of C-mfecs For Efficient Electrocatalysesmentioning

confidence: 99%

Ten years of carbon‐based metal‐free electrocatalysts

et al. 2019

View full text Add to dashboard Cite

Since the discovery of the first carbon-based metal-free electrocatalysts (C-MFECs, i.e., N-doped carbon nanotubes) for the oxygen reduction reaction in 2009, the field of C-MFECs has grown enormously over the last 10 years.C-MFECs, as alternatives to nonprecious transition metals and/or precious noble metal-based electrocatalysts, have been consistently demonstrated as efficient catalysts for oxygen reduction, oxygen evolution, hydrogen evolution, carbon dioxide reduction, nitrogen reduction, and many other (electro-) chemical reactions. Recent research and development of C-MFECs have indicated their potential applications in fuel cells, metal-air batteries, and hydrogen generation through water oxidation as well as electrochemical production of various commodity chemicals, such as ammonia, alcohols, hydrogen peroxide, and other useful hydrocarbons. Further research and development of C-MFECs would surely revolutionize traditional energy conversion and storage technologies with minimal environmental impact. In this short review article, we summarize the journey of C-MFECs over the past 10 years with an emphasis on materials development and their structure-property characterization for applications in fuel cells and metal-air batteries. Current challenges and future prospects of this emerging field are also discussed. K E Y W O R D Scarbon, electrocatalysis, energy conversion, energy storage, metal-free electrocatalyst

show abstract

High-performance dye-sensitized solar cells using edge-halogenated graphene nanoplatelets as counter electrodes

Cited by 86 publications

References 44 publications

The Morphology–Property Effect and Synergetic Catalytic Effect of CdS as Electrocatalysts for Dye-Sensitized Solar Cells

The Morphology–Property Effect and Synergetic Catalytic Effect of CdS as Electrocatalysts for Dye-Sensitized Solar Cells

Sandwich-like octahedral cobalt disulfide/reduced graphene oxide as an efficient Pt-free electrocatalyst for high-performance dye-sensitized solar cells

Ten years of carbon‐based metal‐free electrocatalysts

Contact Info

Product

Resources

About