Počet záznamů: 1  

Blend ratio and applied voltage effects on the charge recombination in bulk heterojunction polymer solar cells based on anthracene-containing poly(arylene-ethynylene)-alt-poly(arylene-vinylene) studied using magnetoconductance

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    0542810 - ÚMCH 2022 RIV GB eng J - Článek v odborném periodiku
    Radaoui, M. - Taboubi, Oumayma - Ben Fredj, A. - Romdhane, S. - Egbe, D. A. M. - Bouchriha, H.
    Blend ratio and applied voltage effects on the charge recombination in bulk heterojunction polymer solar cells based on anthracene-containing poly(arylene-ethynylene)-alt-poly(arylene-vinylene) studied using magnetoconductance.
    Journal of Physics and Chemistry of Solids. Roč. 156, September (2021), s. 1-8, č. článku 110190. ISSN 0022-3697. E-ISSN 1879-2553
    Institucionální podpora: RVO:61389013
    Klíčová slova: polymer solar cell * charge recombination * organic magnetoconductance
    Kód oboru RIV: CD - Makromolekulární chemie
    Obor OECD: Polymer science
    Impakt faktor: 3.995, rok: 2020
    https://www.sciencedirect.com/science/article/pii/S0022369721002560?via%3Dihub

    We have investigated the magnetic field effect on the current in bulk heterojunction polymer solar cells made of blends of an anthracene-containing poly(arylene-ethynylene)-alt-poly (arylene-vinylene) (AnE-PVstat) and fullerene molecules prepared in various ratios (1:1, 1:2, 1:3 and 1:4) and different applied voltages ranging from 0.7 to 0.95 V in steps of 0.05 V. The efficiencies and fill factors of the resulting devices improved upon increasing the PCBM content. The highest efficiency obtained was 2.7% for the device prepared using 75% PCBM. The measured magnetoconductance (MC) is positive and monotonic over the full range of the blend ratios and applied voltages studied. We analyzed the MC effect using a magnetoconductance model controlled by interconversion of the singlet and triplet (MIST) electron-hole (e-h) pairs states based on density matrix formalism using the stochastic Liouville equation considering that the singlet and triplet e-h pairs have different recombination and dissociation rates to theoretically reproduce the line shape of MC. For all the applied voltages studied, the recombination and dissociation rates of the e-h pairs on the singlet and triplet states decreased upon increasing the fullerene content until it reached a maximum with a PCBM content of 75 wt%. After this PCBM content, the rates started to increase. However, for each blend ratio, the recombination and dissociation rates of the singlet and triplet e-h pairs increase when the voltage is increased.
    Trvalý link: http://hdl.handle.net/11104/0320329

     
     
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