Förster energy transfer mechanism and color tunability in three binary conjugated polymer blends

Al-Bati, Sameer; Jumali, Mohammad Hafizuddin Hj; Ibtehaj, Khatatbeh; Al‐Asbahi, Bandar Ali; Yap, Chi Chin

doi:10.1016/j.optmat.2021.111085

Cited by 3 publications

(9 citation statements)

References 34 publications

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“…The nonradiative energy transfer depends on the overlap between the wave functions of the excited states of the donor and the acceptor, and therefore, it is directly related to the value of R DA . From the absorption, PL, PLQY measurements, and information about the measurement parameters, it is possible to calculate R 0 using the following equation: ,,, R 0 = 0.2108 true[ κ 2 normalΦ normalD 0 n − 4 ∫ 0 ∞ F normalD ( λ ) ε normalA ( λ ) λ 4 nobreak0em0.25em⁡ normald λ true] 1 / 6 where κ 2 is the orientation factor, Φ D 0 is the donor PLQY, n is the refraction index of the solvent, F D is the normalized spectral distribution of the donor emission, λ is the photon wavelength and ε A is the molar extinction coefficient of the acceptor. The constants used to calculate the Förster radius were: κ 2 = 2/3 , and n = 1.40496. , The PLQY was measured in solution using an integrating sphere, and the result was Φ D 0 = (61.9 ± 6.2)%; ε A (λ) was calculated from the absorption spectrum of L54, and the emission spectrum of L75 was used for F D (λ) and I D .…”

Section: Resultsmentioning

confidence: 99%

“…After calculating R 0 it is possible to calculate R DA by using the equation: ,,, R DA 6 = R 0 6 − true( 1 − I DA I normalD true) R 0 6 1 − I DA I D where I D is the emission of the donor and I DA is the emission of the donor in the presence of the acceptor. I D was obtained from the emission spectrum of L75, and I DA was obtained from the emission spectrum of the respective terpolymer or blend.…”

Section: Resultsmentioning

confidence: 99%

“…The concentration of the solution was kept at 1 × 10 –3 mg/mL for comparison with the lifetime results. By obtaining R 0 and R DA , it is possible to calculate the ETE using the following equation: ,, η = R 0 6 R DA 6 + R 0 6 Through these measurements and parameters, the Förster radius between L75 and L54 was obtained as R 0 = 42.6 Å, and then it was possible to calculate R DA for the terpolymers and the blends. Table shows the results of these calculations.…”

Section: Resultsmentioning

confidence: 99%

Section: Calculation Of Energy Transfer Efficiency 331 By Lifetimementioning

confidence: 99%

“…The concentration of the solution was kept at 1 × 10 −3 mg/mL for comparison with the lifetime results. By obtaining R 0 and R DA , it is possible to calculate the ETE using the following equation: 27,28,34…”

Section: Calculation Of Energy Transfer Efficiency 331 By Lifetimementioning

confidence: 99%

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Intramolecular Energy Transfer in the Terpolymer LaPPS76

dos S. Moraes,

Uhdre,

de J. Santana

et al. 2024

J. Phys. Chem. C

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Due to the advancements in the OLED technology, research on new materials as active layers for the production of OLED devices has grown steadily. The synthesis of new polymers has been investigated to obtain characteristics that optimize the intensity, durability, and emission of the spectra of the OLEDs in specific spectral regions. The terpolymer LaPPS76 (L76) has a structure that combines segments of copolymers fluorenebenzothiadiazole (L54) and fluorene-terpyridine (L75). This study characterized the emission of terpolymer L76 and quantified the energy transfer (ET) processes between these chromophores. Solutions of L76 diluted in tetrahydrofuran (THF) were prepared with two relative percentages of chromophores. Additionally, mixtures of copolymers L75 and L54 were prepared, in the same proportions as they appear in the terpolymer, to compare the emission properties of the blends with those of the terpolymers. The optical characterization of L76 revealed that internal ET occurs within the molecule, from fluorene-terpyridine (FT) to fluorene-benzothiadiazole (FB), and ET saturation is observed for higher percentages of FT. The comparison between the emission from the blend and the one from the terpolymer, as a function of the solution concentration, highlights the difference in transfer processes. The efficiency of ET was quantified through calculations based on the lifetime and Forster radius, both showing higher ET efficiency in the terpolymers. The material with the highest donor concentration achieved an ET efficiency of nearly 100%, as calculated using the Forster radius.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Calculation Of Energy Transfer Efficiency 331 By Lifetimementioning

confidence: 99%

Section: Calculation Of Energy Transfer Efficiency 331 By Lifetimementioning

confidence: 99%

See 3 more Smart Citations

Intramolecular Energy Transfer in the Terpolymer LaPPS76

dos S. Moraes,

Uhdre,

de J. Santana

et al. 2024

J. Phys. Chem. C

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Effect of TiO2 nanoparticles on energy transfer mechanism in ternary nanocomposite conjugated polymer blend

Al-Bati

Jumali

Ibtehaj

et al. 2021

Optik

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Effect of Solvent on Optical Properties and Surface Topography of Nanocomposite Conjugated Polymer Thin Film

Al-Bati

Aljboor

Ibtehaj

et al. 2022

ECS J. Solid State Sci. Technol.

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The addition of TiO2 nanoparticles (NPs) to a white-emission conjugated polymer (CP) blend of poly(9,9-dioctylfluorene-2,7-diyl) (PFO) and poly(2-methoxy-5(2-ethylhexyl)−1,4-phenylenevinylene (MEH-PPV) enhanced the optical properties. However, the agglomeration of the nanoparticles restricted enhancement. This drawback was successfully overcome in this study. The highly polar solvent chloroform was mixed with toluene and used to prepare thin films of the blends. Solution blending and spin-coating techniques were used to prepare thin films with different TiO2 nanoparticle contents. In addition, pure toluene and chloroform were investigated as solvents for the nanocomposite blend. These three cases were compared by studying the emission spectra, absorption spectra, Commission Internationale d’Eclairage coordinates (CIE), field emission scanning electron microscopy (FE-SEM) images and scanning probe microscope (SPM) images. The average roughness, quenching constant, and energy transfer probability were calculated. The optimum physical properties of the thin film were achieved using nanoparticles at 15wt% and applied to the binary blend with a mixture of equal amounts of toluene and chloroform. Although chloroform is better for nanoparticle distribution, toluene is mandatory for obtaining the highest yield of PFO.

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Förster energy transfer mechanism and color tunability in three binary conjugated polymer blends

Cited by 3 publications

References 34 publications

Intramolecular Energy Transfer in the Terpolymer LaPPS76

Intramolecular Energy Transfer in the Terpolymer LaPPS76

Effect of TiO2 nanoparticles on energy transfer mechanism in ternary nanocomposite conjugated polymer blend

Effect of Solvent on Optical Properties and Surface Topography of Nanocomposite Conjugated Polymer Thin Film

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