Quadrupolar (donor)2acceptor-acid chromophores for dye-sensitized solar cells: influence of the core acceptor

Richard, Coralie A.; Pan, Zhenxing; Parthasarathy, Anand; Arroyave, Frank A.; Estrada, Leandro A.; Schanze, Kirk S.; Reynolds, John R.

doi:10.1039/c4ta01199f

Cited by 14 publications

(9 citation statements)

References 35 publications

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“…63 Two external thiophene units were covalently attached to the core at two different positions for DBP, together with two isomers for DTP lead to a set of four isomeric structures (100-102), as shown in Fig. 63 Two external thiophene units were covalently attached to the core at two different positions for DBP, together with two isomers for DTP lead to a set of four isomeric structures (100-102), as shown in Fig.…”

Section: Rigidified Aromatics Segments: Quinoxaline and Benzothiadiazmentioning

confidence: 99%

Sensitizers with rigidified-aromatics as the conjugated spacers for dye-sensitized solar cells

et al. 2015

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Metal-free dye sensitized solar cells emerged as an important source of a renewable energy resource because of low production, simple fabrication process and a wide availablility of organic dyes. This review mainly focuses on metal-free sensitizers having rigidifed-aromatics as the conjugated spacer for applications in DSSCs. Based on their structures dyes have been divided into three major subsegments: (i) ladder type polyphenylenes with or without heteroatoms; (ii) rigidfied-aromatics as a donor segments; (iii) fused polyaromatics. Planarization of organic molecules through rigidification of aromatics allows effective communication and their smaller reorganization energy is beneficial to photoinduced charge transfer. Dyes having rigidified aromatics as a conjugated spacer emerged as promising candidates and a maximum efficiency of 12.5 % has been achieved with DSSCs without coadsorbate or co-sensitizer.

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Section: Rigidified Aromatics Segments: Quinoxaline and Benzothiadiazmentioning

confidence: 99%

Sensitizers with rigidified-aromatics as the conjugated spacers for dye-sensitized solar cells

et al. 2015

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“…For its unique characters, D-π-A-π-D molecule performs high molar extinction coefficient and long absorption wavelength, which were widely used in the field of dye-sensitized solar cells, fluorescence probes and two-photo initiated photopolymerizaiton. [11][12][13][14][15] However, despite having high molar extinction coefficient and long absorption wavelength, D-π-A-π-D molecule used as photoinitiator does not exhibit high-initiation efficiency. 19,20 Our group has designed and synthesized a new type LED photoinitiator, BFC((2E,6E)-2,6-bis(furan-2-ylmethylene)cyclohexanone), which has the structure of D-π-A-π-D, [16][17][18] through one step reaction of Claisen-Schmidt condensation of furfural and cyclohexanone at a mild condition.…”

Section: Introductionmentioning

confidence: 99%

“…D‐π‐A‐π‐D molecule, where D and A are electron donating and withdrawing groups respectively, has extended π‐conjugation system and efficient intramolecular charge transfer (ICT) property. For its unique characters, D‐π‐A‐π‐D molecule performs high molar extinction coefficient and long absorption wavelength, which were widely used in the field of dye‐sensitized solar cells, fluorescence probes and two‐photo initiated photopolymerizaiton 11–15 …”

Section: Introductionmentioning

confidence: 99%

Synthesis of D‐π‐A‐π‐D photoinitiator with high‐photoinitiation efficiency by restricting photoinduced isomerization process

Zhu

2021

J of Applied Polymer Sci

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In this work, we designed a new D-π-A-π-D LED photoinitiator BBFC with high molar excitation coefficient and photoinitiation efficiency based on the principle of inhibition of photoisomerization. Via introduction of benzene ring on the BFC, which we have reported before, the absorption wavelength, molar excitation coefficient and photoinitiation efficiency of BBFC were greatly improved. The characterization and theoretical calculation proved BBFC has no photoisomerization, for the change of the configuration of BBFC requiring high energy due to the steric effect. BBFC has higher initiation efficiency than that of commercial photoinitiator ITX with little content under air condition. This might have potential to design new D-π-A-π-D molecules with high-photoinitiation efficiency and contribute the field of photo polymerization.

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“…The electronic and structural properties of chromophores with donoracceptor (D-p-A) substituted organic compounds are of considerable interest because of their potential applications in nonlinear optical materials (NLO), [9][10][11] light emitting diodes (OLED), 12,13 and sensors 14 as well as organic eld effect transistors (OFET). [15][16][17] Beside these widely used applications, pushpull chromophores are also used in organic photovoltaic cells (PVCs), 18 dye sensitised solar cells (DSSC), [19][20][21][22] bulkheterojunction solar cells (BHJ), 23 and biological imaging.…”

Section: Introductionmentioning

confidence: 99%

Unveiling the photophysical and morphological properties of an acidochromic thiophene flanked dipyrrolopyrazine-based chromophore for optoelectronic application

Meti

Gong

2018

RSC Adv.

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A series of dipyrrolopyrazine (DPP) based chromophores featuring thiophene and varied donor (N,Ndimethylamine, NH 2 , OMe) and acceptor (CF 3 , CN, NO 2 ) appendages have been synthesized. The structures and properties of the chromophores were investigated by absorption spectroscopy, electrochemistry, differential scanning calorimetry, and thermogravimetric analysis. X-ray crystallographic analysis indicates a planar geometry for the molecule 7g. Surface morphological studies reveal the formation of microrods and nanorods. The acidochromic behavior of the chromophore which shows a prominent red-shift in the absorption spectra owing to the protonation of the pyrazine segment provides a valuable opportunity to assess the sensory response. Acid dependent spectral changes could be successfully applied to detect pH in biological fluids and acid impurities in solvents.

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Quadrupolar (donor)2acceptor-acid chromophores for dye-sensitized solar cells: influence of the core acceptor

Cited by 14 publications

References 35 publications

Sensitizers with rigidified-aromatics as the conjugated spacers for dye-sensitized solar cells

Sensitizers with rigidified-aromatics as the conjugated spacers for dye-sensitized solar cells

Synthesis of D‐π‐A‐π‐D photoinitiator with high‐photoinitiation efficiency by restricting photoinduced isomerization process

Unveiling the photophysical and morphological properties of an acidochromic thiophene flanked dipyrrolopyrazine-based chromophore for optoelectronic application

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