Donor group influence on dye-sensitized solar cell device performances: Balancing dye loading and donor size

Ndaleh, David; Nugegoda, Dinesh; Watson, Jonathon; Cheema, Hammad; Delcamp, Jared H.

doi:10.1016/j.dyepig.2020.109074

Cited by 7 publications

(7 citation statements)

References 70 publications

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“…[ 23 ] Therefore, further engineering of dye molecules, i.e., the length of alkoxy chains should be carefully tailored to optimize dye‐loading and molecular aggregation. [ 24 ] In addition, the stability and loading amount of adsorbed dye may be improved by either using 2‐carboxypyridine as the anchoring group or increasing the number of light‐harvesting units by employing two anchors to the dye molecules, thus improving the photocurrent and PCE. [ 25 ] As for photovoltaic parameters extracted from photocurrent‐voltage ( J–V ) curves, V OC of CXC12 ‐based DSSCs reaches 1.12 V under AM 1.5G illumination, which is higher than CXC22 ‐based ones of 1.06 V, indicating that CXC12 has better capability for preventing charge recombination.…”

Section: Resultsmentioning

confidence: 99%

Anthracene‐Bridged Sensitizers for Dye‐Sensitized Solar Cells with 37% Efficiency under Dim Light

Chen

Nguyễn

Chiu

et al. 2022

Advanced Energy Materials

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and convert it to electricity. Nowadays, silicon-based solar cells are considered as the most matured PVSCs that possess a power conversion efficiency (PCE) over 25%. [2] However, silicon-based solar cells have several drawbacks including low flexibility, requirement of high purity silicon, and employment of energy-intensive process, thus cost-effective and ease-fabricated dye-sensitized solar cells (DSSCs) and perovskite solar cells (PSCs) have become emerging candidates for solar energy harvesting with reported PCE as high as 14% and 25%, respectively. [3] Although PSCs have reached a remarkable PCE of 25% from lower than 10% just within a decade, [3g,4] the commercialization of PSCs could be hindered by the use of toxic lead-based materials for its excellent performance. [5] Accordingly, DSSCs have numerous advantages over their counterparts, for example, low cost of materials needed to fabricate DSSCs, mechanical robustness, transparency, and colorfulness. Furthermore, DSSCs have shown potential application as indoor photo voltaics (IPVs) to harvest energy from artificial light sources such as halogen lamps, fluorescent lamp, and light-emitting diode (LED) bulbs. [6] With the development of Internet of Things (IoT) in the coming decades, IPVs are important alternatives of batteries for billions of wireless sensors that work indoor or under dim-light conditions, [7] showing a great opportunity for DSSC applications. To enhance the PCE of DSSCs for indoor use, the light absorber undoubtedly is the most important component and should show absorption that matches well with the spectrum of light sources. In 2019, Venkatesan et al. reported quasi-solid-state DSSCs that exhibited a PCE as high as 20.63% under T5 fluorescent light illumination using benchmark ruthenium-based dye N719 as a sensitizer. [8] However, ruthenium-based dyes are not an ideal candidate for large-scale application due to expensiveness and rarity of ruthenium source on the earth. Thus ruthenium-free dyes including porphyrin-based and organic dyes that are composed of abundant elements including H, C, N, O, and S play a key role in the development of DSSCs for indoor and outdoor uses. The properties of ruthenium-free dyes such as HOMO/ LUMO energy levels, UV-vis absorption, and intra molecular charge separation can be readily tailored by molecular engineering, thus several design strategies for ruthenium-free New anthracene-bridged organic dyes CXC12 and CXC22 are designed and synthesized for high-efficiency dye-sensitized solar cells (DSSCs) under dim light. Compared to their parent dye TY6, CXC dyes have additional anthracene-acetylene group to extend the π-conjugation of the molecules, resulting in red-shifted absorption and an enhanced molar extinction coefficient. The absorption spectra of CXC12 and CXC22 with a maximum located at 561 and 487 nm, respectively, match to those of AM 1.5G sunlight and T5 fluorescent light better than that of TY6 (419 nm). It was initially anticipated that long alkoxyl chains introduced to the 2,6-positio...

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Section: Resultsmentioning

confidence: 99%

Anthracene‐Bridged Sensitizers for Dye‐Sensitized Solar Cells with 37% Efficiency under Dim Light

Chen

Nguyễn

Chiu

et al. 2022

Advanced Energy Materials

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“…Each selected dye orbital energy is measured through the same cyclic voltammetry procedure in DCM, leading to the same electrochemical approximations for orbital energies. 40–42,44,56–58,61 This consistency allows the computed orbital energies to be empirically corrected through a LSF once again. Furthermore, all three methods overestimate the LUMO energies.…”

Section: Computational Resultsmentioning

confidence: 99%

“…Furthermore, the LUMO score has the highest average score of the three parameters at 65. Specifically, benchmark dyes that scored a 100 for the LUMO are NL4, 58 ND2, 57 AP17, 41 and AP16. 41 The charge transfer average score resides in the middle of the two parameters and is 48.…”

Section: Computational Resultsmentioning

confidence: 99%

“…Seventy-five benchmark molecular dyes are selected to find the most accurate quantum chemical approach to predict the absorption maxima ( λ max ), the LUMO energy, and charge transfer properties of the combinatorially-derived, novel, theoretical molecules for analysis in this work. 6,40–73 The LUMO energy is a primary focus since all high performance DSCs use TiO 2 , but the redox shuttle is tunable to the organic dye's HOMO energy. The choice of λ max will be utilized here since the preferred absorption onset ( λ onset ) is much more involved to model theoretically, and λ max roughly correlates with λ onset .…”

Section: Methodsmentioning

confidence: 99%

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An automated quantum chemistry-driven, experimental characterization for high PCE donor–π–acceptor NIR molecular dyes

et al. 2023

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“…18,20,27 Our group also worked on the effect of additional electronwithdrawing/electron-donating groups at different positions of a selected dye sensitizer. 19,36 Such modifications showed an effective change in the efficiency of several metal-free dye sensitizers as revealed by us as well as different researchers over the ages based on the considerable changes of donors, 26,27,[37][38][39][40][41] spacers [42][43][44][45][46][47] and acceptors. [48][49][50][51][52][53][54] To further increase the efficiency, researchers have been working on the effect of the dual nature of the different components.…”

Section: Introductionmentioning

confidence: 99%

A quantum chemical study: thoughtful exploration for optimal donors in Y-type dual donor-based dye sensitizers

Behera,

Sahu,

Sahu

et al. 2023

Phys. Chem. Chem. Phys.

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Donor group influence on dye-sensitized solar cell device performances: Balancing dye loading and donor size

Cited by 7 publications

References 70 publications

Anthracene‐Bridged Sensitizers for Dye‐Sensitized Solar Cells with 37% Efficiency under Dim Light

Anthracene‐Bridged Sensitizers for Dye‐Sensitized Solar Cells with 37% Efficiency under Dim Light

An automated quantum chemistry-driven, experimental characterization for high PCE donor–π–acceptor NIR molecular dyes

A quantum chemical study: thoughtful exploration for optimal donors in Y-type dual donor-based dye sensitizers

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