Novel Star-Shaped Triphenylamine-Based Molecular Glasses and Their Use in OFETs

Sonntag, Martin; Kreger, Klaus; Hanft, Doris; Strohriegl, Peter; Setayesh, Sepas; Leeuw, Dago de

doi:10.1021/cm047750i

Cited by 184 publications

(116 citation statements)

References 18 publications

(20 reference statements)

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“…26 For these studies, the various sensitizers were adsorbed on 4 mm thick transparent TiO 2 lms and excited at a wavelength of 530 nm using laser pulses with a duration of 7 ns. In order to scrutinize both processes, i.e.…”

Section: Laser Studiesmentioning

confidence: 99%

New pyrido[3,4-b]pyrazine-based sensitizers for efficient and stable dye-sensitized solar cells

et al. 2014

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A series of new pyrido [3,4-b]pyrazine-based organic sensitizers (PP-I and APP-I-IV) containing different donors and p-spacers have been synthesized and employed in dye-sensitized solar cells (DSSCs). The absorption spectra properties of dyes are analysed by density functional theory (DFT). The calculated results in combination with the experiments suggest that the absorption characteristics and excited state features will mainly be dominated by charge transfer transitions from the highest occupied molecular orbital (HOMO) to the lowest unoccupied molecular orbital (LUMO) and to higher LUMO orbitals.Furthermore, attaching the octyloxy groups significantly extends the p-conjugation of the donor in APP-IV, which raises the HOMO energy and facilitates its oxidation. As a consequence, APP-IV exhibits the lowest HOMO-LUMO energy gap among all dyes, which, in turn, corresponds well with the red shift of the absorption spectra. Transient photovoltage and photocurrent decay experiments as well as electrochemical impedance spectroscopy indicate that the electron lifetime and charge recombination resistance are increased due to the introduction of octyloxy chains on the donor unit, resulting in the high photovoltage based on APP-IV. It was found that APP-IV based DSSCs with liquid electrolyte display the highest power conversion efficiency (PCE) of 7.12%. Importantly, a PCE of 6.20% has been achieved for APP-IV based DSSCs with ionic-liquid electrolytes and retained 97% of the initial value after continuous light soaking for 1000 h at 60 C. This renders these pyrido [3,4-b]pyrazine-based sensitizers quite promising candidates for highly efficient and stable DSSCs.

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Section: Laser Studiesmentioning

confidence: 99%

New pyrido[3,4-b]pyrazine-based sensitizers for efficient and stable dye-sensitized solar cells

et al. 2014

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“…Thin-film OFETs of compound 1 suggested that the mobility of the macrocyclic structure was much higher than that of the linear compound triphenyldiamine. [9][10][11][12][13] In this paper, we will focus on i) the crystallinity of the macrocyclic structure, ii) the synthesis of its micrometer/nanometer-sized single crystals, iii) the transport properties of the micro/nanometer-sized single crystals in OFETs, and iv) the mobility dependence of the micro/ nanocrystals on their size. It is expected that the understanding of the structure and property relationship of the macrocyclic structure will be beneficial for the further design and synthesis of materials with high crystallinity and mobility, to further extend their application in OFETs.…”

mentioning

confidence: 99%

Micrometer‐ and Nanometer‐Sized, Single‐Crystalline Ribbons of a Cyclic Triphenylamine Dimer and Their Application in Organic Transistors

Song

et al. 2009

Advanced Materials

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A cyclic triphenylamine dimer with high crystallinity is demonstrated. Micrometer‐ and nanometer‐sized single‐crystalline ribbons are easily produced by a physical vapor transport technique. Field‐effect transistors of the ribbons exhibit mobilities up to 0.05 cm2 V−1 s−1. The mobility of the devices depends greatly on the size of the ribbons: the smaller the ribbons, the higher the mobility.

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“…Theoretical study of LB layer architecture Theoretical study of LB layer architecture Theoretical study 9 of LB layers built of fluorene derivatives can be analyzed on two planes, hydrophilic-aromatic and hydrophobic-aliphatic part of molecule. Free rotation of aromatic rings causes bigger molecular area for aromatic molecular part (~108 Å 2 ), what is also confirmed by experimental π-A isotherms.…”

Section: Properties Of Langmuir -Blodgett Films Built Of Charge Transmentioning

confidence: 99%

An efficient synthesis and physicochemical evaluation of fluorene derivatives

Sołoducho¹,

Idzik²,

Cabaj³

et al. 2006

Arkivoc

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Novel Star-Shaped Triphenylamine-Based Molecular Glasses and Their Use in OFETs

Cited by 184 publications

References 18 publications

New pyrido[3,4-b]pyrazine-based sensitizers for efficient and stable dye-sensitized solar cells

New pyrido[3,4-b]pyrazine-based sensitizers for efficient and stable dye-sensitized solar cells

Micrometer‐ and Nanometer‐Sized, Single‐Crystalline Ribbons of a Cyclic Triphenylamine Dimer and Their Application in Organic Transistors

An efficient synthesis and physicochemical evaluation of fluorene derivatives

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