A photoluminescent layer for improving the performance of dye-sensitized solar cells

Wang, Tzu-Hui; Huang, Tzu-Wei; Tsai, Yu-Chen; Chang, Ya-Wen; Liao, Chien‐Shiun

doi:10.1039/c4cc10215k

Cited by 14 publications

(7 citation statements)

References 28 publications

(22 reference statements)

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“…However, a different trend to optimize the performance of the DSSCs has been started by adding the energy relay dyes (ERDs) to the electrolyte [ 57 , 304 ]; inserting phosphorescence or luminescent chromophores, such as applying rare-earth doped oxides [ 58 – 60 ] into the DSSC; and coating a luminescent layer on the glass of the photoanode [ 61 , 62 ]. In the process of adding the ERDs to the electrolyte or to the HTM, some highly luminescent fluorophores have to be chosen.…”

Section: Latest Approaches and Trendsmentioning

confidence: 99%

Dye-Sensitized Solar Cells: Fundamentals and Current Status

Sharma

Sharma³

2018

Nanoscale Res Lett

770

426

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Dye-sensitized solar cells (DSSCs) belong to the group of thin-film solar cells which have been under extensive research for more than two decades due to their low cost, simple preparation methodology, low toxicity and ease of production. Still, there is lot of scope for the replacement of current DSSC materials due to their high cost, less abundance, and long-term stability. The efficiency of existing DSSCs reaches up to 12%, using Ru(II) dyes by optimizing material and structural properties which is still less than the efficiency offered by first- and second-generation solar cells, i.e., other thin-film solar cells and Si-based solar cells which offer ~ 20–30% efficiency. This article provides an in-depth review on DSSC construction, operating principle, key problems (low efficiency, low scalability, and low stability), prospective efficient materials, and finally a brief insight to commercialization.

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Section: Latest Approaches and Trendsmentioning

confidence: 99%

Dye-Sensitized Solar Cells: Fundamentals and Current Status

Sharma

Sharma³

2018

Nanoscale Res Lett

770

426

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“…In Equations ( 28)-( 30), k, A, E a , R, T, κ, k B , h, ∆H # and ∆S # have conventional meanings such as rate constant, pre-exponential factor, activation energy, universal gas constant, Kelvin temperature, transmission coefficient (generally taken to be mathematical figure '1 ), Boltzmann constant, Planck's constant, enthalpy change of activation, and entropy change of activation, respectively. Equations ( 28) and ( 30) can be rearranged to linear Equations ( 31) and (34), respectively, to draw plots and to estimate the activation parameters. The values of b (path length of quartz cuvette) and (molar absorptivity of [Fe II (bpy) 2 (CN) 2 ] in water) are 1 cm and ≈4388 M −1 cm −1 , respectively.…”

Section: Thermodynamic Parameters Of Activationmentioning

confidence: 99%

“…The production of new dyes and electron mediators, as well as a better understanding of their interactions and the interfacial electron transfer kinetics is critical for future advancement in this field and is currently the focus of the DSSCs community's scientific efforts [6][7][8]10,[28][29][30][31][32][33][34][35][36]. In terms of kinetics, efficient cell performance is attained when electron transfer events happen quickly.…”

Section: Introductionmentioning

confidence: 99%

Catalytic Effect of 1,4-Dioxane on the Kinetics of the Oxidation of Iodide by Dicyanobis(bipyridine)iron(III) in Water

et al. 2021

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Dye-sensitized solar cells (DSSCs) are a technically and financially viable alternative to today’s photovoltaic systems using p-n junctions. The two functions are isolated here, which are unlike traditional systems where the semiconductor is thought to perform both light absorption and charge carrier transport. This article discusses the potential use of dicyanobis(bipyridine)iron(III) to oxidize iodide as a sensitizer in DSSCs. However, it is critical to understand the kinetics of this essential process in order to understand the mechanism of electron transport. The oxidation of iodide by dicyanobis(bipyridine)iron(III) in three reaction media was studied: water, 10% v/v 1,4-dioxane-water, and 20% v/v 1,4-dioxane-water. The reaction was carried out in a regular laboratory setting, with no special sensitive conditions or the use of expensive materials, making it a cost-effective and practical method. Dicyanobis(bipyridine)iron(III) oxidized iodide in selected media at 0.06 M ionic strength and constant temperature. The reaction was subjected to a spectrophotometric analysis. The data were acquired by measuring the rise in visible absorbance as a function of time after the formation of dicyanobis(bipyridine)iron(II). The reaction proceeded with an overall fractional (0.5), first order, and third order in water, 10% media, and 20% media, respectively. The presence of dicyanobis(bipyridine)iron(III) in either of the reaction media had no effect on the rate. The effect of protons (H+) on the rate constant indicated resistance in water and catalysis in dioxane-water media containing 10–20% dioxane. When the ionic strength was raised, there was no change in the rate constant in water, but there was a deceleration in both binary solvent media. In an aqueous medium, the thermodynamic parameters of activation were computed as Ea 46.23 kJ mol−1, 24.62 M s−1, ΔH# 43.76 kJ mol−1, ΔS# −226.5 J mol−1 K−1, and ΔG# 111.26 kJ mol−1 (25 °C). By increasing the rate of the reaction to its maximum, this study discovered the binary solvent media with the highest catalytic efficiency, i.e., 20% v/v 1,4-dioxane-water, which may increase the efficiency of DSSCs without using any expensive material or unusual experimental conditions.

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“…The appeal of micron-sized particle assemblies, and the motivation of efforts to overcome this barrier, is driven from an applications perspective by their desirable optical properties (17), and, from a fundamental science perspective, by the ability to employ simpler optical monitoring for direct mechanistic insight into DFP crystallization (18). Micron-sized DFPs possess relatively short-range interactions compared to their sizes, and extremely narrow melting transition ranges (1-2 o C), which leads to tedious annealing protocols with many days of incubation for successful crystallization (4,(19)(20)(21)(22)(23). Recently, it was shown that DNA strand displacement can be used to widen the melting transition range and to shorten the effective crystallization time (8).…”

mentioning

confidence: 99%

Binary Superlattice Design by Controlling DNA-Mediated Interactions

et al. 2017

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Most binary superlattices created using DNA functionalization or other approaches rely on particle size differences to achieve compositional order and structural diversity. Here we study two-dimensional (2D) assembly of DNAfunctionalized micron-sized particles (DFPs), and employ a strategy that leverages the tunable disparity in interparticle interactions, and thus enthalpic driving forces, to open new avenues for design of binary superlattices that do not rely on the ability to tune particle size (i.e., entropic driving forces). Our strategy employs tailored blends of complementary strands of ssDNA to control interparticle interactions between micron-sized silica particles in a binary mixture to create compositionally diverse 2D lattices. We show that the particle arrangement can be further controlled by changing the stoichiometry of the binary mixture in certain cases. With this approach, we demonstrate the ability to program the particle assembly into square, pentagonal, and hexagonal lattices. In addition, different particle types can be compositionally ordered in square checkerboard and hexagonal -alternating string, honeycomb, and Kagome arrangements. The field of DNA-mediated particle assembly has undergone remarkable progress over recent years (1), owing, at least in part, to its potential as a powerful platform for rational, bottomup design and engineering of complex materials, and motivated by recent successful translations into applications as diverse as sensing (2), photonics (3), and catalysis. The growing number of synthetic pathways and design strategies to fabricate DNA-functionalized particles (DFPs) has led to the development of a diverse palette of tailorable building blocks from which to choose, comprised of particles of a wide range of inorganic to organic compositions, a near continuum of particle sizes spanning nanometers to micrometers, precise DNA sequence control and thus tailorable hybridization, diverse chemistries for DNA grafting/association, and fine tunability of the grafting density. (4)(5)(6) Accompanying this expanding diversity of building blocks has been a parallel development of specific to generalized design principles that have begun to link molecular-scale DFP function with mechanisms of assembly and the resulting uni-or multi-modal crystalline structures.To this end, the growing combination of theory, simulations, and experiments, has helped to overcome some of the challenges in the field. For example, re-entrant melting strategies (7,8) have been successfully developed to alleviate the very narrow temperature ranges for efficient crystallization of DFPs.The most common route to induce attraction between DFPs, and thus program their assembly, leverages the direct or indirect (i.e., with additional DNA linker strand) hybridization of complementary DNA strands tethered separately to two types of particles. Under suitable conditions in such systems, particles with complementary DNA functionality (i.e., 'unlike' particles) form attractive contacts among multiple strands of h...

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A photoluminescent layer for improving the performance of dye-sensitized solar cells

Cited by 14 publications

References 28 publications

Dye-Sensitized Solar Cells: Fundamentals and Current Status

Dye-Sensitized Solar Cells: Fundamentals and Current Status

Catalytic Effect of 1,4-Dioxane on the Kinetics of the Oxidation of Iodide by Dicyanobis(bipyridine)iron(III) in Water

Binary Superlattice Design by Controlling DNA-Mediated Interactions

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