Novel geometric approach for photosensor construction based on dye-sensitization of TiO2 nanoparticles on stainless steel

Rozman, Martin; Sygkridou, Dimitra; Godec, Regina Fuchs; Σταθάτος, Ηλίας; Bren, Urban

doi:10.1016/j.sna.2019.05.034

Cited by 12 publications

(4 citation statements)

References 46 publications

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“…The constructed ECD can be used for teaching purposes and provides a visual representation of charge transfer and energy storage processes. By eliminating the need for expensive optically transparent electrodes, this architecture can be used in other applications such as solar cells, photodetectors, or even light-emitting diodes, but this comes with significant modification challenges compared to the current state of the art . Finally, the device architecture can be used as an electrochemical sensor in analytical chemistry because the surface near the selected electrode can be exposed to its environment.…”

Section: Discussionmentioning

confidence: 99%

Electrochromic Device Demonstrator from Household Materials

et al. 2022

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Electrochromism encompasses reversible changes of material's optical properties (color, opacity) under the influence of an external electric current or applied voltage. The effect has been known for decades, but its importance continues to grow due to the rapid development of smart systems and the accompanying demand to build devices that consume less power. Most commercial electrochromic devices (ECDs) require sophisticated chemicals and advanced material preparation techniques. Also, the demonstration of electrochromism in chemistry classes mainly uses expensive WO 3 films, intrinsically conductive polymers, and/or optically transparent electrodes (OTEs). The aim of this article is to present a simple and fast educational method to build ECDs from household materials without the need for OTEs: unsharpened kitchen knives are used as electrodes, curcumin from turmeric is used as the electrochromic dye, and baking soda is used as the electrolyte. The laboratory experiments presented will help students gain a deeper understanding of the fundamentals of electrochemistry (electrolysis, pH change) and electrochromism (in our case, color changes due to pH-induced keto-enol tautomerism of curcumin).

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Section: Discussionmentioning

confidence: 99%

Electrochromic Device Demonstrator from Household Materials

et al. 2022

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“…[2]. Therefore, DSSC is ideal for use as a photosensor platform [3]. Most DSSC fabrications use liquid electrolyte, but using liquid electrolyte for a long time can cause the photoanode and counter electrode to easily corrode.…”

Section: Introductionmentioning

confidence: 99%

A Brief Study of the Carbon Counter Electrode for Photosensor based on DSSC

Surya Yuliana,

Chairani Alvin Nadhira,

Mufti

et al. 2024

E3S Web Conf.

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We investigate the fabrication of photosensor devices based on dye sensitized solar cells (DSSC). DSSC photovoltaic cells use solar light energy to trigger chemical reactions as a source of electrical energy. DSSC has several advantages, namely low production costs, environmental friendliness, easy fabrication, and high-power conversion efficiency. Therefore, DSSC is ideal for use as a photosensor. Most DSSCs use a wet electrolyte to provide ionic conductivity to the photoanode. However, long-term use of liquid electrolyte causes corrosion which can reduce the stability of the resulting current. In this research, yttria stabilized zirconia (YSZ) solid electrolyte was used to prevent corrosion of the photoanode. Samples were characterized using XRD, SEM, UV-Vis and photoresponse. The XRD results show the crystallinity of nanoporous TiO2 and YSZ. SEM results show that the average particle size distribution of TiO2 /YSZ DSSC cells is 315 nm. The sensitivity, rise and fall times of the photosensor have been calculated by varying the counter electrode when testing the photoresponse. Finally, Graphene as a counter showed higher voltage and current compared to AC which is 0.2 V and 0.05 µA.

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“…However, due to their opacity, most of them are limited to the use of a single metal electrode [1][2][3][4][5][6]. Electrode cost is a problem in the research of photoanodes and counter electrodes (CE) [7,8]. The typical metal mesh electrode technology has not yet been industrialized, and its insufficient light-receiving layer area and complex process of TiO 2 film are both limiting factors [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

A Novel Dye-Sensitized Solar Cell Structure Based on Metal Photoanode without FTO/ITO

Yang

et al. 2022

Micromachines

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Traditional dye-sensitized solar cells (DSSC) use FTO/ITO containing expensive rare elements as electrodes, which are difficult to meet the requirements of flexibility. A new type of flexible DSSC structure with all-metal electrodes without rare elements is proposed in this paper. Firstly, a light-receiving layer was prepared outside the metal photoanode with small holes to realize the continuous oxidation-reduction reaction in the electrolyte; Secondly, the processing technology of the porous titanium dioxide (TiO2) film was analyzed. By testing the J–V characteristics, it was found that the performance is better when the heating rate is slow. Finally, the effects of different electrode material combinations were compared through experiments. Our results imply that in the case of all stainless-steel electrodes, the open-circuit voltage can reach 0.73 V, and in the case of a titanium photoanode, the photoelectric conversion efficiency can reach 3.86%.

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Novel geometric approach for photosensor construction based on dye-sensitization of TiO2 nanoparticles on stainless steel

Cited by 12 publications

References 46 publications

Electrochromic Device Demonstrator from Household Materials

Electrochromic Device Demonstrator from Household Materials

A Brief Study of the Carbon Counter Electrode for Photosensor based on DSSC

A Novel Dye-Sensitized Solar Cell Structure Based on Metal Photoanode without FTO/ITO

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