New cyanoacetanilides based dyes as effective co-sensitizers for DSSCs sensitized with ruthenium (II) complex (HD-2)

Elmorsy, Mohamed R.; Su, Rui; Abdel‐Latif, Ehab; Badawy, Safa A.; El‐Shafei, Ahmed; Fadda, Ahmed A.

doi:10.1007/s10854-020-03337-3

Cited by 17 publications

(9 citation statements)

References 40 publications

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“…The average PCE value of the devices follows the order OSi-ErB > OSi-EoY > OSi-27D > OSi-EoB, which may be because the functional group also has a certain influence on the efficiency of the device, and −NO 2 is the electron-withdrawing group, which is not conducive to electron transport. 30,31 External quantum efficiency (EQE) studies (Figure 2c) revealed that the OSiND-based device's EQE in the 430−800 nm region is somewhat boosted when compared to the ZnO-based control device. Combining the short-circuit current value and EQE in Table 1, the deviation is about 5%.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Cathode Interface Layer Based on Organosilica Nanodots for Efficient and Stable Inverted Organic Solar Cells

Cui

et al. 2022

ACS Appl. Energy Mater.

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The interface layer greatly affects the performance of organic solar cells (OSCs). In this paper, we selected an amino-containing silane molecule (AEEA) and four fluorescein molecules with different functional groups to prepare a series of cathode interface materials based on organosilica nanodots (OSiNDs) by one-step hydrothermal synthesis, in order to research the impact of functional groups on the performance of OSC devices. The good film crystallinity and carrier mobility without high-temperature annealing endowed the OSCs with high V oc and J sc, and the best efficiency of 15.91% was reached with the OSi-ErB cathode interlayer. Moreover, compared with ZnO devices, OSiND-based devices showed highly improved light stability after UV irradiation.

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Section: ■ Results and Discussionmentioning

confidence: 99%

Cathode Interface Layer Based on Organosilica Nanodots for Efficient and Stable Inverted Organic Solar Cells

Cui

et al. 2022

ACS Appl. Energy Mater.

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“…Based on the oxidation onset, the potential HOMO energy level was calculated assuming that the IP of ferrocene equals −5.1 eV [ 55 ], being −5.73 and −5.63 eV for 2a and N719, respectively. HOMO levels are somewhat more negative than the I − /I 3− redox potential (−4.8 eV) [ 32 ], and should enable the dye regeneration. The LUMO energy level determined from the optical energy gap (Eg OPT ), and calculated HOMO to be −3.03 and −3.47 eV for 2a and N719, respectively.…”

Section: Resultsmentioning

confidence: 99%

“…Two groups of DSSC can be specified. The first one is based on two dyes, one of which is a new metal-free dye, and the other is a commercial metal-containing sensitizer, which is often Ru (e.g., N719, N3, HD-2) [ 7 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 ]. It is worth noting that these PV cells exhibit higher efficiencies than devices containing only commercial dye in most cases.…”

Section: Introductionmentioning

confidence: 99%

New Benzo[h]quinolin-10-ol Derivatives as Co-sensitizers for DSSCs

et al. 2021

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New benzo[h]quinolin-10-ol derivatives with one or two 2-cyanoacrylic acid units were synthesized with a good yield in a one-step condensation reaction. Chemical structure and purity were confirmed using NMR spectroscopy and elemental analysis, respectively. The investigation of their thermal, electrochemical and optical properties was carried out based on differential scanning calorimetry, cyclic voltammetry, electronic absorption and photoluminescence measurements. The analysis of the optical, electrochemical and properties was supported by density functional theory studies. The synthesized molecules were applied in dye-sensitized solar cells as sensitizers and co-sensitizers with commercial N719. The thickness and surface morphology of prepared photoanodes was studied using optical, scanning electron and atomic force microscopes. Due to the utilization of benzo[h]quinolin-10-ol derivatives as co-sensitizers, the better photovoltaic performance of fabricated devices compared to a reference cell based on a neat N719 was demonstrated. Additionally, the effect of co-adsorbent chemical structure (cholic acid, deoxycholic acid and chenodeoxycholic acid) on DSSC efficiency was explained based on the density functional theory.

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“…Furthermore, a wellknown substance with a non-planar architecture that exhibits a stiff plane [24], three-dimensional steric, a hole transporting characteristic, light-harvesting features and decreased aggregation on semiconductor surfaces (TiO 2 ) [25]. To improve DSSC photovoltaic efficiency, photosensitizers are required to have bathochromic shifts by introducing donating groups (alkoxy, alkyl) and aromatic groups to TPA that increase the HOMO energy orbital level [26] or introducing different anchoring groups (CN, CO and NH) that facilitate the electron injection from the donor moiety into the photoanode and decrease charge aggregation of the dye on TiO 2 [27][28][29][30][31][32]. To improve the binding strength of dyes on TiO 2 , the incorporation of double electron-accepting groups into the organic donor structure to generate a double-anchored compound has been suggested, which exhibited higher device efficiency than single D-π-A dyes [33][34][35][36][37][38][39].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Novel Triphenylamine-Based Organic Dyes with Dual Anchors for Efficient Dye-Sensitized Solar Cells

et al. 2022

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A new series of metal-free organic dyes (SM1-5) with dual anchors are synthesized for application in dye-sensitized solar cells (DSSC). Here, a simple triphenylamine (TPA) moiety serves as the electron donor, while di-cyanoacrylamide and di-thiazolidine-5-one units serve as the electron acceptors and anchoring groups. To understand the effect of dye structure on the photovoltaic characteristics of DSSCs, the photophysical and electrochemical properties, as well as molecular geometries calculated from density functional theory (DFT), are used for dyes SM1-5. The extinction coefficients of the organic dyes SM1-5 are high (5.36–9.54 104 M−1 cm−1), indicating a high aptitude for light harvesting. The photovoltaic studies indicated that using dye SM4 as a sensitizer showed a power conversion efficiency (PCE) of 6.09% (JSC = 14.13 mA cm−2, VOC = 0.624 V, FF = 68.89%). Interestingly, SM4 showed the highest values of VOC among all dyes, including N-719, due to its maximum dye coverage on the TiO2 surface, enhancing charge recombination resistance in the sensitized cell. The good agreement between the theoretically and experimentally obtained data indicates that the energy functional and basis set employed in this study can be successfully utilized to predict new photosensitizers' absorption spectra with great precision before synthesis. Also, these results show that bi-anchoring molecules have a lot of potentials to improve the overall performance of dye-sensitized solar cells.

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New cyanoacetanilides based dyes as effective co-sensitizers for DSSCs sensitized with ruthenium (II) complex (HD-2)

Cited by 17 publications

References 40 publications

Cathode Interface Layer Based on Organosilica Nanodots for Efficient and Stable Inverted Organic Solar Cells

Cathode Interface Layer Based on Organosilica Nanodots for Efficient and Stable Inverted Organic Solar Cells

New Benzo[h]quinolin-10-ol Derivatives as Co-sensitizers for DSSCs

Synthesis of Novel Triphenylamine-Based Organic Dyes with Dual Anchors for Efficient Dye-Sensitized Solar Cells

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