Electromodulation of photoluminescence in vacuum-evaporated films of fac-tris(2-phenylpyridine)iridium(III)

Stampor, Waldemar; Mȩżyk, J.

doi:10.1016/j.chemphys.2007.07.016

Cited by 12 publications

(2 citation statements)

References 49 publications

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“…These pairs can dissociate into free carriers with k −1 and k −3 rate constants forming a photocurrent, or recombine with k 1 and k 3 rate constants regenerating a dye ground state, for singlet and triplet pairs, respectively. The mutual relationships between these rate constants are as follows: k −1 < k −3 due to better dissociation from triplet pairs in such a kind of heavy metal complexes 41 whereas k 1 > k 3 due to more efficient spin allowed 1 (e-h) → S 0 recombination than spin protected transition from a triplet pair state, 3 (e-h) → S 0 . According to the scheme ( Fig.…”

Section: Resultsmentioning

confidence: 99%

Magnetic field effects in dye-sensitized solar cells controlled by different cell architecture

Klein

Pankiewicz

Zalas

et al. 2016

Sci Rep

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The charge recombination and exciton dissociation are generally recognized as the basic electronic processes limiting the efficiency of photovoltaic devices. In this work, we propose a detailed mechanism of photocurrent generation in dye-sensitized solar cells (DSSCs) examined by magnetic field effect (MFE) technique. Here we demonstrate that the magnitude of the MFE on photocurrent in DSSCs can be controlled by the radius and spin coherence time of electron-hole (e-h) pairs which are experimentally modified by the photoanode morphology (TiO2 nanoparticles or nanotubes) and the electronic orbital structure of various dye molecules (ruthenium N719, dinuclear ruthenium B1 and fully organic squaraine SQ2 dyes). The observed MFE is attributed to magnetic-field-induced spin-mixing of (e-h) pairs according to the Δg mechanism.

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Section: Resultsmentioning

confidence: 99%

Magnetic field effects in dye-sensitized solar cells controlled by different cell architecture

Klein

Pankiewicz

Zalas

et al. 2016

Sci Rep

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“…In order to minimize this undesired effect, the knowledge of quenching mechanism is important. Few reports appeared on this issue [4][5][6] in which a neat Ir͑ppy͒ 3 film was used as a sample. Here, we have investigated the effects of external electric field on optical absorption, PL and PLexcitation ͑PL-Ex͒ spectra as well as PL decay profiles for Ir͑ppy͒ 3 doped in a PMMA film.…”

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confidence: 99%

Photo- and field-induced charge-separation and phosphorescence quenching in organometallic complex Ir(ppy)3

Mehata

Ohta

2011

Applied Physics Letters

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Electric field effects on absorption and photoluminescence ͑PL͒ spectra of organometallic phosphorescent emitter Ir͑ppy͒ 3 , ͕tris͓2-phenylpyridinato-C 2 ,N͔ iridium ͑III͖͒ doped in a film of polymethyl methacrylate ͑PMMA͒ have been confirmed at temperatures in the range of 40-295 K. Field-induced quenching of PL observed for Ir͑ppy͒ 3 is attributed to the decrease both of emitting state population and of the lifetime of PL. The quenching is independent of excitation energy as well as temperature. Field-assisted charge separation or dissociation of electron-hole ͑e-h͒ pair produced by photoexcitation may decrease the population of the emitting state. The Stark shifts on absorption and PL spectra have also been analyzed.

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Iridium, Tris[2-(2-pyridinyl-κN)phenyl-κC]-, (OC-6-22)-iridium

Bédard

Collins

2015

Encyclopedia of Reagents for Organic Synthesis

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Electromodulation of photoluminescence in vacuum-evaporated films of fac-tris(2-phenylpyridine)iridium(III)

Cited by 12 publications

References 49 publications

Magnetic field effects in dye-sensitized solar cells controlled by different cell architecture

Magnetic field effects in dye-sensitized solar cells controlled by different cell architecture

Photo- and field-induced charge-separation and phosphorescence quenching in organometallic complex Ir(ppy)3

Iridium, Tris[2-(2-pyridinyl-κN)phenyl-κC]-, (OC-6-22)-iridium

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