Optoelectronic property enhancement of conjugated polymer in poly(9,9′-di-n-octylfluorenyl-2.7-diyl)/titania nanocomposites

Jumali, Mohammad Hafizuddin Haji; Al‐Asbahi, Bandar Ali; Yap, Chi Chin; Salleh, Muhamad Mat; AlSalhi, Mohamad S.

doi:10.1016/j.tsf.2012.09.067

Cited by 34 publications

(26 citation statements)

References 32 publications

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“…Even though both emission peaks were associated with the acceptor, the peaks of the donor remained at a high intensity. This enhancement in the emission intensity was attributed to the oxygen vacancies and charge trapping effect …”

Section: Resultssupporting

confidence: 87%

Long‐range dipole–dipole energy transfer enhancement via addition of SiO₂/TiO₂ nanocomposite in PFO/MEH‐PPV hybrid thin films

Al‐Asbahi

Qaid

Jumali

et al. 2019

J of Applied Polymer Sci

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Different weight ratios of poly(9,9‐dioctylfluorene‐2,7‐diyl) (PFO)/poly[2‐methoxy‐5‐(2‐ethylhexyloxy)‐1,4‐phenylenevinylene] (MEH‐PPV) hybrid thin films, with and without a SiO2/TiO2 nanocomposite (NC), were successfully prepared using a solution blending method. All samples were deposited onto glass substrates by a spin coating technique to produce homogeneous thin films. The effect of the SiO2/TiO2 NC on the enhancement of the energy transfer mechanism in the PFO/MEH‐PPV hybrids was investigated. The energy transfer parameters were calculated on the basis of the absorption and emission measurements. The long‐range dipole–dipole energy transfer (Förster type) between the acceptor and donor molecules was enhanced in the presence of the SiO2/TiO2 NC in the hybrid thin films. The addition of the SiO2/TiO2 NC in the PFO/MEH‐PPV hybrids reduced the distance between the donor and acceptor molecules more than the individual addition of SiO2 or TiO2 nanoparticles. Moreover, the direct relationships between the acceptor contents and energy transfer parameters, such as the energy transfer radius (RDA), energy transfer efficiency (η), and energy transfer probability (PDA), were estimated using theoretical fittings. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47845.

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Section: Resultssupporting

confidence: 87%

Long‐range dipole–dipole energy transfer enhancement via addition of SiO₂/TiO₂ nanocomposite in PFO/MEH‐PPV hybrid thin films

Al‐Asbahi

Qaid

Jumali

et al. 2019

J of Applied Polymer Sci

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“…The decrease in the emission intensities for all CPs at high wt.% of TiO 2 nanoparticles sent a strong signal that quenching inhibition does not depend solely on the number of nanoparticles. While the high number of nanoparticles is commendable, the effectiveness of the TiO 2 nanoparticles to trap the excited electron also depends on the compatible energy diagram and contact quality primarily with the PFO [ 19 , 36 ].…”

Section: Resultsmentioning

confidence: 99%

Improving Photophysical Properties of White Emitting Ternary Conjugated Polymer Blend Thin Film via Additions of TiO2 Nanoparticles

et al. 2020

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The effect of TiO2 nanoparticles on the photophysical properties of ternary conjugated polymer (CP) blends of poly(9,9-dioctylfluorene-2,7-diyl) (PFO), poly 9,9-dioctylfluorene-alt-benzothiadiazole (F8BT) and poly(2-methoxy-5(2-ethylhexyl)-1,4 -phenylenevinylene (MEH-PPV) thin films was investigated. This ternary blend used a fixed amount of PFO as the donor with MEH-PPV and F8BT in various ratios as the acceptors. The solution-blending method and the spin-coating technique were used to prepare the blends and the thin films, respectively. Through efficient Förster Resonance Energy Transfer (FRET), the desired white emission was achieved with PFO/0.3 wt.% F8BT/0.5 wt.% MEH-PPV ternary blend thin film. Additions of nanoparticles up to 10 wt.% dramatically intensified the white emission which then dimmed at higher contents due to agglomerations. The current density–voltage characteristics of the nanocomposite thin films exhibited dependency on the content and distributions of the nanoparticles. Finally, a possible underlying mechanism for the intensification of emission is proposed.

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“…The higher current can be attributed to a reduction in the resistance and activation energy of the emissive layer [20,31]. The lower turn-on voltage of injection current in the presence of SiO 2 /TiO 2 nanocomposites compared to their absence can be attributed to a better charge carrier injection [28,32].…”

Section: Resultsmentioning

confidence: 99%

Influence of SiO2/TiO2 Nanocomposite on the Optoelectronic Properties of PFO/MEH-PPV-Based OLED Devices

Al‐Asbahi

2018

Polymers

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The influence of SiO2/TiO2 nanocomposites on the performance of organic light-emitting diodes (OLEDs) based on poly(9,9′-di-n-octylfluorenyl-2,7-diyl) (PFO) and various amounts of poly(2-methoxy-5-(2-ethyl-hexyloxy)-1,4-phenylene-vinylene) (MEH-PPV) was investigated. Prior to the fabrication of the OLEDs on indium-tin oxide (ITO) substrates, the hybrids of PFO/MEH-PPV, in the presence and absence of the SiO2/TiO2 nanocomposites, were prepared via the solution blending technique. Improvement of the performances of the devices in the presence of the SiO2/TiO2 nanocomposites was detected. The existence of the SiO2/TiO2 nanocomposites led to better charge carrier injection and, thus, a significant reduction in the turn-on voltage of the devices. The enhancement of MEH-PPV electroluminescence peaks in the hybrids in the presence of SiO2/TiO2 nanocomposites is not only a result of the Förster resonance energy transfer, but also of hole-electron recombination, which is of greater significance. Moreover, the existence of the SiO2/TiO2 nanocomposites led to a shift of the CIE chromaticity coordinates of the devices.

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Optoelectronic property enhancement of conjugated polymer in poly(9,9′-di-n-octylfluorenyl-2.7-diyl)/titania nanocomposites

Cited by 34 publications

References 32 publications

Long‐range dipole–dipole energy transfer enhancement via addition of SiO₂/TiO₂ nanocomposite in PFO/MEH‐PPV hybrid thin films

Long‐range dipole–dipole energy transfer enhancement via addition of SiO₂/TiO₂ nanocomposite in PFO/MEH‐PPV hybrid thin films

Improving Photophysical Properties of White Emitting Ternary Conjugated Polymer Blend Thin Film via Additions of TiO2 Nanoparticles

Influence of SiO2/TiO2 Nanocomposite on the Optoelectronic Properties of PFO/MEH-PPV-Based OLED Devices

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Optoelectronic property enhancement of conjugated polymer in poly(9,9′-di-n-octylfluorenyl-2.7-diyl)/titania nanocomposites

Cited by 34 publications

References 32 publications

Long‐range dipole–dipole energy transfer enhancement via addition of SiO2/TiO2 nanocomposite in PFO/MEH‐PPV hybrid thin films

Long‐range dipole–dipole energy transfer enhancement via addition of SiO2/TiO2 nanocomposite in PFO/MEH‐PPV hybrid thin films

Improving Photophysical Properties of White Emitting Ternary Conjugated Polymer Blend Thin Film via Additions of TiO2 Nanoparticles

Influence of SiO2/TiO2 Nanocomposite on the Optoelectronic Properties of PFO/MEH-PPV-Based OLED Devices

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Long‐range dipole–dipole energy transfer enhancement via addition of SiO₂/TiO₂ nanocomposite in PFO/MEH‐PPV hybrid thin films

Long‐range dipole–dipole energy transfer enhancement via addition of SiO₂/TiO₂ nanocomposite in PFO/MEH‐PPV hybrid thin films