Absorption and emission spectroscopic investigation of cyanovinyldiethylaniline dye vapors

The wave-guided travelling-wave laser action (amplified spontaneous emission) of a neat film of poly(p-phenylenevinylene) (PPV) on a quartz glass substrate prepared by a sulfinyl precursor technique is studied. The samples are transversally pumped with picosecond excitation pulses (wavelength 347.15 nm, duration 35 ps). Lasing occurs at 550 nm. The optical constants of the neat films are determined by transmittance measurements exploiting the multiple beam interference in the transparency region. A fluorescence spectroscopic characterisation is carried out determining the fluorescence quantum distribution, fluorescence quantum yield, degree of fluorescence polarisation, and fluorescence lifetime. The emitting chromophore size (emitting singlet exciton extension) is determined by the ratio of exciton radiative lifetime to repeat-unit based radiative lifetime. The obtained size of about two repeat units is discussed in a disordered solid-state polymer model.

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“…r a (k), and the fluorescence quantum distribution, E(k), by use of the relations (Peterson et al 1971;Deshpande et al 1990) …”

Section: Photo-physical and Lasing Characterisation Of A Ppv Neat Filmmentioning

confidence: 99%

Photo-physical and lasing characterisation of a polyparaphenylenevinylene (PPV) neat film

et al. 2005

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“…(13). The stimulated emission cross-section spectra are calculated from the fluorescence quantum distribution spectra £<A), and the radiative lifetimes T RAD [49,50]. The pure electronic S 0 -S, transition frequency vsl is determined by the crossing of the ^a bs (A) and o-e JA) curves [(7 abs (^s l ) = (r em (^s l )].…”

Section: Determination Of Steady-state Absorption and Fluorescence Spmentioning

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Intersystem-crossing and excited-state absorption in eosin Y solutions determined by picosecond double pulse transient absorption measurements

Penzkofer

Beidoun

Daiber

1992

Journal of Luminescence

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100

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“…The relation between the spontaneous emission distribution E(X) = P sp (X)/jP sp (X)dl (integration over all 4 F 3/2 -> % transitions) and the stimulated emission cross-section distribution <7 em (A) is [4,20,30,31] ff«nW…”

Section: Relation Between Spontaneous Emission and Stimulated Emissiomentioning

confidence: 99%

Emission spectra and cross-section spectra of neodymium laser glasses

Furthner

Penzkofer

1992

Opt Quant Electron

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Absorption and emission spectroscopic investigation of cyanovinyldiethylaniline dye vapors

Cited by 124 publications

References 20 publications

Photo-physical and lasing characterisation of a polyparaphenylenevinylene (PPV) neat film

Photo-physical and lasing characterisation of a polyparaphenylenevinylene (PPV) neat film

Intersystem-crossing and excited-state absorption in eosin Y solutions determined by picosecond double pulse transient absorption measurements

Emission spectra and cross-section spectra of neodymium laser glasses

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