Effect of field cycling on the ac and dc properties of Alq3 device

Silva, V.M.; Mendiratta, S.K.; Pereira, L.

doi:10.1016/j.jnoncrysol.2006.01.071

Cited by 4 publications

(3 citation statements)

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“…1b and c. As shown, the ITO device ac response is well fitted by a single circuit, involving a parallel resistor R 1 and a capacitor C 1 , with the Rs in series. This description is in agreement with previous studies, where the ITO/Alq3/Al response has been investigated also as function of temperature and applied bias voltages [15][16][17][18]. In our case, R 1 (coinciding with R(f) value at low frequencies) is about 200 KOhm and the extracted equivalent conductivity (4•10 -9 S/cm) is very close to the data reported in Ref.…”

Section: Lettersupporting

confidence: 92%

“…We have focused on Alq3, since, so far, the combination LSMO/Alq3 showed to provide the most interesting results in organic spintronics, even if an exhaustive explanation for this occurrence is still lacking. Furthermore, the widely investigated behaviour of ITO/Alq3/Al devices, which were used in many cases to analyze the Alq3 intrinsic electrical parameters, represents a reliable reference to evidence the features related to the LSMO/Alq3 interface [11,[15][16][17][18].…”

Section: Lettermentioning

confidence: 99%

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Manganite/Alq3 interfaces investigated by impedance spectroscopy technique

Barra¹,

Cassinese²,

D’Angelo³

et al. 2008

Organic Electronics

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Section: Lettersupporting

confidence: 92%

Section: Lettermentioning

confidence: 99%

Manganite/Alq3 interfaces investigated by impedance spectroscopy technique

Barra¹,

Cassinese²,

D’Angelo³

et al. 2008

Organic Electronics

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“…One typical influence of the active layer molecular conformation in the electrical carrier transport is clearly shown in the ohmic region (before the turn-on OLED voltage value) for some samples, where some I-V instability is present. This behavior is usual and disappears after several I–V cycles [ 63 ].…”

Section: Resultsmentioning

confidence: 99%

All-Solution Processed Single-Layer WOLEDs Using [Pt(salicylidenes)] as Guests in a PFO Matrix

et al. 2022

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Herein, we report the synthesis and characterization of two Pt(II) coordination compounds, the new platinum(II)[N,N′-bis(salicylidene)-3,4-diaminobenzophenone)] ([Pt(sal-3,4-ben)]) and the already well-known platinum(II)[N,N′-bis(salicylidene)-o-phenylenediamine] ([Pt(salophen)]), along with their application as guests in a poly [9,9-dioctylfluorenyl-2,7-diyl] (PFO) conjugated polymer in all-solution processed single-layer white organic light-emitting diodes. Completely different performances were achieved: 2.2% and 15.3% of external quantum efficiencies; 2.8 cd A−1 and 12.1 cd A−1 of current efficiencies; and 3103 cd m−2 and 6224 cd m−2 of luminance for the [Pt(salophen)] and [Pt(sal-3,4-ben)] complexes, respectively. The Commission Internationale de l’Eclairage (CIE 1931) chromaticity color coordinates are (0.33, 0.33) for both 0.1% mol/mol Pt(II):PFO composites at between approximately 3.2 and 8 V. The optoelectronic properties of doped and neat PFO films have been investigated, using steady-state and time-resolved photoluminescence. Theoretical calculations at the level of relativistic density functional theory explained these results, based on the presence of the Pt(II) central ion’s phosphorescence emission, considering spin-orbit coupling relationships. The overall results are explained, taking into account the active layer morphological properties, along with the device’s electric balance and the emitter’s efficiencies, according to deep-trap space-charge models. Considering the very simple structure of the device and the ease of synthesis of such compounds, the developed framework can offer a good trade-off for solution-deposited white organic light-emitting diodes (WOLEDs), with further applications in the field of lighting and signage.

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