Enhancement of structure and optical dispersion properties of N,N′-Bis(3-methylphenyl)-N,N′-diphenylbenzidine thin films: Impact of UV irradiation

Abdel-Khalek, H.; Amin, Fatma M.; Wassel, Ahmed R.; El-Mahalawy, Ahmed M.

doi:10.1016/j.optmat.2021.110867

Cited by 20 publications

(6 citation statements)

References 63 publications

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“…The formation of localized states plays an important role in descending the band gape energy and also in the decline of the length of the bond. Continuously, these confined localized states have an impact in decreasing the potential barrier height [15]. It is worth mentioning that the activation energy is expected to be decreased, meanwhile the charges hopping between the neighboring sites is facilitated.…”

Section: Resultsmentioning

confidence: 99%

“…Nowadays, several of the literature is concerned to study the impact of UV-irradiation on the enhancement of the optical properties of small organic molecules, since their optical properties can be modified by considerable energetic radiations. For instance, the band gap energy of N,N′-Bis (3-methylphenyl)-N,N′diphenylbenzidine (TPD) films was decreased from 3.09 eV to 2.97 eV after these films were exposed to the UVirradiation for 5 min [15]. While, the static values of the third nonlinear parameter for pristine TPD thin film increased from 4.015 10 14…”

Section: Introductionmentioning

confidence: 99%

“…´esu, after pristine TPD was exposed to UV-irradiation for 5 min [15]. Moreover, the optical band gap energy of 2-Amino-4-(2-chlorophenyl)-6-ethyl-5-oxo-5,6-dihydro-4H-pyrano [3,2-c] quinoline-3-carbonitrile (Ch-HPQ) was found to be decreased from 2.95 eV to 1.88 eV, while the third nonlinear parameter was increased from 0.079 10 12…”

Section: Introductionmentioning

confidence: 99%

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Effect of UV irradiation on the linear and nonlinear optical properties of Erbium(III)-Tris(8-hydroxyquinolinato) thin films: optoelectronic performance

Qashou¹

2022

Phys. Scr.

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Thin films of Erbium(III)-Tris(8-hydroxyquinolinato) (Erq3) were prepared by thermal evaporating technique. The structural properties of the UV-irradiated films were investigated by XRD-pattern. The analysis of the XRD-Pattern revealed the polycrystalline structure for the as-deposited Erq3 film, whereas the amorphous structure was observed for the UV irradiated film- s. Hence, the optical properties were significantly affected by the sublevels energy produced by the induced defects. For instance, the band gap energy was lowered by amount of 16.6% from its original value when the films were exposed to UV-irradiation for 120 minutes. Whilst, the normal dispersion values increased by amount of 18.2% when the films were exposed to UV-radiation for 120 minutes. In according to single oscillator, the dispersion parameters ( , and ε∞) were evaluated. The nonlinear optical parameters such as third-nonlinear optical susceptibility (3) and the nonlinear refractive index ( 2) were discussed under the effect of UV-radiation. It was noticed the impact of UV-irradiation in increasing the (3) value, and therefore the UV-irradiation Erq3 films posses the probability to be used in the nonlinear optical materials. The effect of UV-radiation on the dielectric constants of Erq3 films were also explained.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of UV irradiation on the linear and nonlinear optical properties of Erbium(III)-Tris(8-hydroxyquinolinato) thin films: optoelectronic performance

Qashou¹

2022

Phys. Scr.

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“…S2 (supporting information) and compared to the normalized absorption spectra for estimating Stokes shift (absorption-emission difference) in each case. This shift may be ascribed to the EB's exciton binding energy in metalloporphyrin films [88]. It is heartening to note that CuTPP records the minimum value of E B (* 0.25 eV) compared to the other metalloporphyrins under investigation and other organic semiconductors such as CuPc, a-6 T, NPD, TPD, PTCDA, and Alq 3 [88,89].…”

Section: Photoluminescence Spectramentioning

confidence: 94%

“…This shift may be ascribed to the EB's exciton binding energy in metalloporphyrin films [88]. It is heartening to note that CuTPP records the minimum value of E B (* 0.25 eV) compared to the other metalloporphyrins under investigation and other organic semiconductors such as CuPc, a-6 T, NPD, TPD, PTCDA, and Alq 3 [88,89]. The minimum exciton binding energy, the more facile electron-hole separation (exciton dissociation).…”

Section: Photoluminescence Spectramentioning

confidence: 96%

Efficacy assessment of metalloporphyrins as functional materials for photodetection applications: role of central tetrapyrrole metal ions

2022

Self Cite

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Despite the continued research, it is still not entirely clear how important characteristics of metalloporphyrins are exploited for optoelectronic applications. Consequently, the stimulant aim for this work is to design and implement organic/inorganic heterojunctions based on metalloporphyrins (CuTPP, NiTPP, FeTPPCl, and MnTPPCl)/n-Si and evolve their photodetection performance. To evaluate the performance variation of variously manufactured photodetectors, structural characterizations using XRD, Raman spectroscopy, XPS, and AFM are combined with optical absorption and photoluminescence. Core level emissions are used to unveil the deposited films’ electronic and structural features. The estimated energy gap values are found to be 2.4, 2.53, 2.49, and 2.43 eV for CuTPP. NiTPP. FeTPPCl, and MnTPPCl, respectively. The fabricated devices’ PL-spectra are analyzed, where CuTPP exhibited the lowest value of excitonic binding energy. The photodetection performance is evaluated via the J–V relation under dark and various radiant illumination power. The microelectronic parameters of the manufactured heterojunctions are estimated. Ultimately, the photodetectors' figures of merit are estimated for all the fabricated devices, where CuTPP/n-Si heterojunction achieved the best performance and highest values of R = 11.95 mA/W, D* = 8.7 × 109 Jones, LDR = 46.18 dB, SNR = 203.4, and trise/tfall = 51.32/54.29 ms. Consequently, MTPP-based photoreceptors would play an active role as a powerful tool for light detection soon. Graphical abstract

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Preparation and Photophysical Properties of Znq₂ Metallic Nanomaterials

Li,

Long,

Huang

et al. 2024

Cryst. Res. Technol.

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Bis(8‐hydroxyquinolates) Zinc (Znq2) can be used as a light‐emitting layer material in OLED devices to achieve its efficient electroluminescence effect. In this paper, Znq2 powder has been successfully synthesized and modified by the physical vapor deposition (PVD) method. Precursors and nano‐materials are characterized by XRD, SEM, PL, and so on. The performance of the modified material has been significantly improved. The emission intensity and absorption intensity in the deposited products increased with the increase in PVD temperature. At 453 K, luminous properties such as luminous intensity reach the optimal value including its fluorescence lifetime. Fluorescence lifetime values vary from 13 to 17 ns with the increase in temperature. The luminescence mechanism is also discussed. The energy gap and absorption spectrum of HOM‐LUMO are calculated by the DFT/UB3LYP method. The experimental values agree well with the theoretical values. The nanomaterial crystals modified by PVD technology are more orderly, impurities are reduced, and the luminous stability of the material is improved, which may be one of the reasons for the relatively slow decline in product life. The research combined with theoretical simulation is expected to be helpful to the research and promotion of such materials.

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Enhancement of structure and optical dispersion properties of N,N′-Bis(3-methylphenyl)-N,N′-diphenylbenzidine thin films: Impact of UV irradiation

Cited by 20 publications

References 63 publications

Effect of UV irradiation on the linear and nonlinear optical properties of Erbium(III)-Tris(8-hydroxyquinolinato) thin films: optoelectronic performance

Effect of UV irradiation on the linear and nonlinear optical properties of Erbium(III)-Tris(8-hydroxyquinolinato) thin films: optoelectronic performance

Efficacy assessment of metalloporphyrins as functional materials for photodetection applications: role of central tetrapyrrole metal ions

Preparation and Photophysical Properties of Znq₂ Metallic Nanomaterials

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Enhancement of structure and optical dispersion properties of N,N′-Bis(3-methylphenyl)-N,N′-diphenylbenzidine thin films: Impact of UV irradiation

Cited by 20 publications

References 63 publications

Effect of UV irradiation on the linear and nonlinear optical properties of Erbium(III)-Tris(8-hydroxyquinolinato) thin films: optoelectronic performance

Effect of UV irradiation on the linear and nonlinear optical properties of Erbium(III)-Tris(8-hydroxyquinolinato) thin films: optoelectronic performance

Efficacy assessment of metalloporphyrins as functional materials for photodetection applications: role of central tetrapyrrole metal ions

Preparation and Photophysical Properties of Znq2 Metallic Nanomaterials

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Product

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Preparation and Photophysical Properties of Znq₂ Metallic Nanomaterials