The use of low-frequency current fluctuations in measuring the mobility of holes in the MEH-PPV polymer

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F24%3A10490928" target="_blank" >RIV/00216208:11320/24:10490928 - isvavai.cz</a>
Alternative codes found
RIV/70883521:28610/24:63580078
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=taCjNhhONf" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=taCjNhhONf</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.synthmet.2024.117764" target="_blank" >10.1016/j.synthmet.2024.117764</a>

Result language
angličtina
Original language name
The use of low-frequency current fluctuations in measuring the mobility of holes in the MEH-PPV polymer
Original language description
A diagnostic method based on the evaluation of low-frequency current fluctuation spectra is presented. When measuring the current through a p-type MEH-PPV sample, the occurrence of fluctuation is observable which can be measured with an AC amplifier. A model has been proposed that proves that the fluctuations originate from the interaction between the valence band and the band gap traps. The mean value of the amplitudes of these fluctuations increases linearly with decreasing frequency with a slope from which the product of mobility and lifetime of current carriers mu p tau p = (9 +/- 3) x 10- 15 cm2V- 1 was obtained. The hole lifetime of (0.27 +/- 0.01) ns was evaluated from the luminescence relaxation using the time-correlated single photon counting (TCSPC) technique. The mobility value (3 +/- 1) x 10-5 cm2 V- 1s- 1 calculated using the above methods was compared with the mobility 1.8 x 10-5 cm2 V- 1s- 1 determined by the CELIV method (Charge extraction by linearly increasing voltage) and good agreement was obtained.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10301 - Atomic, molecular and chemical physics (physics of atoms and molecules including collision, interaction with radiation, magnetic resonances, Mössbauer effect)

Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2024
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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