Influences of sintering temperature on low-cost carbon paste based counter electrodes for dye-sensitized solar cells

Huang, Chun; Lin, Guan You; Lin, Pei Te; Chen, Jhih Wei; Chen, Chia Hao; Chien, Fan Ching

doi:10.7567/jjap.56.082301

Cited by 7 publications

(4 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Figure 7(d) schematically shows the I Zn and Carbon atoms on the Zn sites. In general, a large contact potential gives a large value for V oc [58], so heavy doping is indicated, but mobility is reduced by doping too heavily. Therefore, a compromise is necessary if there is to be a large value for V oc and high mobility for metallic doped ZnO.…”

Section: Resultsmentioning

confidence: 99%

p-GaN/n-ZnO nanorods: the use of graphene nanosheets composites to increase charge separation in self-powered visible-blind UV photodetectors

Huang

Kang

et al. 2018

Nanotechnology

View full text Add to dashboard Cite

ZnO-based heterojunctions have found applications as self-powered ultraviolet photodetectors (PDs). However, high doping levels are not compatible with high mobility for metallic doped ZnO-based PDs so further development has been inhibited. This study demonstrates a method to increase the open-circuit voltage (V ) that allows keeping a sufficiently high level of mobility of ZnO, using a ZnO nanorod/GaN heterojunction that incorporates graphene nanosheets as the active layer. These hybrid PDs have triple the value for V of PDs that have only pure ZnO and better exhibit photo-response characteristics. The results of surface Kelvin probe microscopy and x-ray photoelectron spectrometer show that the complex defects that occur because Zn interstitials form a shallow donor in ZnO are mainly responsible for the increase in the value of V . Using this functional nanostructure as an active layer represents a new method for the manufacture of high-performance self-powered PDs.

show abstract

Section: Resultsmentioning

confidence: 99%

p-GaN/n-ZnO nanorods: the use of graphene nanosheets composites to increase charge separation in self-powered visible-blind UV photodetectors

Huang

Kang

et al. 2018

Nanotechnology

View full text Add to dashboard Cite

show abstract

“…Dye-sensitized solar cells (DSSCs) are photo-electrochemical cells and can be regarded as a mature third-generation photovoltaic technology with numerous distinctive advantages, particularly (i) low handling expense; (ii) high power-conversion efficiency (PCE) with a comparatively low cost; (iii) light weight and (iv) mechanical durability. 1,2) Moreover, DSSCs can be effectively fabricated in different colors and function over a broad range of wavelengths. The components of DSSCs that are combined to make a photo-conversion device are the photoanode, the sensitizer dye, a transparent conductive substrate, the electrolyte and the counter electrode.…”

Section: Introductionmentioning

confidence: 99%

The effect of plasmonic multilayered photoanode structures on the absorption of dye-sensitized solar cells

Rehman¹,

Khan²,

Khan³

et al. 2021

Jpn. J. Appl. Phys.

View full text Add to dashboard Cite

Dye-sensitized solar cells (DSSCs) have recently gained much attention, due to the low-cost materials and their cheaper manufacturing techniques. However, these cells show a weak response to incident solar photons, resulting in poor power-conversion efficiency. In this paper, we described an improvement to the optical absorption efficiency of DSSCs in the wavelength range between 350 nm and 750 nm using the surface plasmon-resonance effect of plasmonic nanoparticles. Three different structures are studied, including unilayer, bilayer, and trilayer photoanodes based on various core–shell plasmonic spherical nanoparticles made of Ag@TiO2. In all structures, the nanoparticle size is optimized to obtain broadband optical absorption. The absorption efficiency of the dye-sensitized solar cell is significantly improved, from 65.2% to 72.3%, by tuning the photoanode structure from unilayer to trilayer. The results show that a unilayer photoanode with smaller-sized nanoparticles leads to higher absorption, compared to larger sizes. The UV–vis results indicate that mixing large- and small-sized nanoparticles in bi- and trilayer photoanodes is a good approach for improving the light-harvesting efficiency of DSSCs, compared to uniformly distributed nanoparticles. A maximum short-circuit current density of 17.32 mA cm−2 is recorded for a photoanode based on a trilayer structure of Ag@TiO2 nanoparticles.

show abstract

“…The results were well in accordance with the FF values demonstrated by related devices. We emphasize that the remarkably high value of FF of the device based on H‐CE (0.73) is one of the highest values reported in the literature especially for the metal‐free carbon CE‐based liquid DSSCs (Figure ) …”

Section: Resultsmentioning

confidence: 74%

“…We emphasize that the remarkably high value of FF of the device based on H-CE (0.73) is one of the highest values reported in the literature especially for the metal-free carbon CE-based liquid DSSCs ( Figure 5). 45,[53][54][55][56][57][58][59][60][61][62][63][64][65]…”

Section: Photovoltaic Performance Of Dsscsmentioning

confidence: 99%

Facile fabrication of low‐cost low‐temperature carbon‐based counter electrode with an outstanding fill factor of 73% for dye‐sensitized solar cells

et al. 2020

View full text Add to dashboard Cite

Summary Developing chemically inert, electrically conductive, and catalytically active counter electrodes (CEs) to replace conventional Pt‐based ones is highly desirable for dye‐sensitized solar cells. Herein, we reported a facile, cost‐effective, and low‐temperature synthesis pathway to develop carbon‐based CEs. The performance of homemade carbon paste (H‐CP)–based CE (H‐CE) was compared with that of commercial carbon paste (C‐CP)–based CE (C‐CE) and Pt‐based CE (Pt‐CE). The scanning electron microscope (SEM) results showed that H‐CE demonstrated a penetrable surface structure which facilitates the diffusion of electrolyte through the carbon electrode. This phenomenon enhanced the triiodide reduction with respect to C‐CE having a compact structure that limits the electrolyte diffusion. The charge transfer properties and catalytic activities of the investigated devices were explored using electrochemical impedance spectroscopy and Tafel polarization measurements; the obtained results indicated that the device based on H‐CE revealed relatively lower charge transfer resistance and higher exchange current density compared with C‐CE‐based device. The current‐voltage measurements showed that the device based on H‐CE has a power conversion efficiency of 2.70%, which was about 1.6 times higher than that of the device based on C‐CE (1.68%). Furthermore, a fill factor of 73% was achieved for the device based on H‐CE, which outperformed the Pt‐based device (69%) and was among one of the highest values obtained in the literature. Also, a tape adhesion test performed on H‐CP‐coated glass substrate displayed its excellent robustness.

show abstract

Influences of sintering temperature on low-cost carbon paste based counter electrodes for dye-sensitized solar cells

Cited by 7 publications

References 30 publications

p-GaN/n-ZnO nanorods: the use of graphene nanosheets composites to increase charge separation in self-powered visible-blind UV photodetectors

p-GaN/n-ZnO nanorods: the use of graphene nanosheets composites to increase charge separation in self-powered visible-blind UV photodetectors

The effect of plasmonic multilayered photoanode structures on the absorption of dye-sensitized solar cells

Facile fabrication of low‐cost low‐temperature carbon‐based counter electrode with an outstanding fill factor of 73% for dye‐sensitized solar cells

Contact Info

Product

Resources

About