Investigation on structural and photodetection properties of Gd2O3 thin films after annealing

Meitei, Ph. Nonglen; Moirangthem, Borish; Ngangbam, Chitralekha; Alam, Mir Waqas; Singh, Naorem Khelchand

doi:10.1007/s10854-022-08053-8

Cited by 10 publications

(7 citation statements)

References 39 publications

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“…Thus, compared with an amorphous Ga 2 O 3 host, the high-temperature-grown crystalline Ga 2 O 3 : Er film exerts a larger crystal field around the doped Er 3+ ions, contributing to the observed enhanced upconversion emissions [32]. The observed enhanced upconversion emission in the high-temperature-grown crystalline Ga 2 O 3 : Er film is similar to the previously reported enhanced photodetection characteristics of annealed Gd 2 O 3 nanorods and thin films [33,34]. The improved crystal structure has been reported in the annealed sample.…”

Section: Resultssupporting

confidence: 84%

The Impact of the Amorphous-to-Crystalline Transition on the Upconversion Luminescence in Er3+-Doped Ga2O3 Thin Films

Liang,

Chen,

Dong

et al. 2024

Energies

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Gallium oxide (Ga2O3) is an emerging wide bandgap semiconductor promising a wide range of important applications. However, mass production of high-quality crystalline Ga2O3 still suffers from limitations associated with poor reproducibility and low efficiency. Low-temperature-grown amorphous Ga2O3 demonstrates comparable performance with its crystalline counterparts. Lanthanide Er3+-doped Ga2O3 (Ga2O3: Er) possesses great potential for developing light-emitting devices, photodetectors, solid-state lasers, and optical waveguides. The host circumstance can exert a crystal field around the lanthanide dopants and strongly influence their photoluminescence properties. Here, we present a systematical study of the impact of amorphous-to-crystalline transition on the upconversion photoluminescence in Ga2O3: Er thin films. Through controlling the growth temperature of Ga2O3: Er films, the upconversion luminescence of crystalline Ga2O3: Er thin film is strongly enhanced over 100 times that of the amorphous Ga2O3: Er thin film. Moreover, the variation of photoluminescence reflects the amorphous-to-crystalline transformation of the Ga2O3: Er thin films. These results will aid further designs of favorable optoelectronic devices integrated with lanthanide-doped Ga2O3 thin films.

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Section: Resultssupporting

confidence: 84%

The Impact of the Amorphous-to-Crystalline Transition on the Upconversion Luminescence in Er3+-Doped Ga2O3 Thin Films

Liang,

Chen,

Dong

et al. 2024

Energies

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“…The two significant peaks at 1187 and 1220 eV, which correspond to a spin–orbit splitting of 32 eV, are the 3d 5/2 and 3d 3/2 energy levels of Gd, respectively. , To explore the bonding possibilities of Gd, we have studied the Gd 4d XPS spectrum in Figure c. The two subpeaks of Gd 4d at 141.3 and 147.2 eV suggest that the chemical state of the Gd element in the film is composed of two types, which are Gd–O and Gd–O–Sn, respectively, rather than the pure form since the binding energy is 144 eV Figure d shows the spectrum of the Sn 3d core level, which has two pairs of peaks between 484 and 495 eV.…”

Section: Resultsmentioning

confidence: 99%

Pentacenequinone-Modulated 2D GdSn-PQ Nanosheets as a Fluorescent Probe for the Detection of Enrofloxacin in Biological and Environmental Samples

Dabur,

Rana,

2024

ACS Appl. Mater. Interfaces

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The fate and effects of fluoroquinolone antibacterial (FQ) on the environment are important since there appears to be a surge in FQ resistance like enrofloxacin (ENR) in both environmental and clinical organisms. Numerous reports indicate that the sensing capabilities of these antibiotics need to be improved. Here, we have investigated the interaction of ENR with our synthesized pentacenequinone-modulated gadolinium−tin (GdSn-PQ) nanosheets and the formation of intermolecular interactions that caused the occurrence of aggregation-induced emission enhancement. The concept for designing hybrid metallic nanosheets comes from the unique features inherited from the parent organic precursor. Due to the distinct interaction between ENR and GdSn-PQ, the interstate conversion (ISC) between GdSn-PQ and ENR induces a significant wavelength shift in photoluminescence (PL), improving reliability, selectivity, and visibility compared to quenching-or AIEE-based methods without peak shifts, allowing for highly sensitive and visually detectable analyses. The fluorescence signal of GdSn-PQ exhibited a linear relationship (R 2 = 0.9911), with the added ENR concentrations ranging from 5 to 90 nM, with a detection limit of 0.10 nM. We have demonstrated its potential and wide use in the detection of ENR in biological samples (human urine and blood serum) and environmental samples (tap water and seawater) with a recovery rate of 98− 108%. The current approach has demonstrated that the 2D GdSn-PQ nanosheet is a novel and powerful platform for future biological and environmental studies.

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“…Many self-powered PDs using metal oxides, such as ZnO, Ga 2 O 3 , TiO 2 , NiO, etc., with different structures have already been reported. − In particular, one-dimensional (1D) structures are considered viable candidates for PD applications as they provide a high surface-to-volume ratio and electron transport features that enhance the device’s performance . Among the metal oxides, gadolinium oxide (Gd 2 O 3 ) is a highly thermodynamically stable material having a high refractive index, wide band gap, and low lattice mismatch with Si. , Recently, authors have reported Gd 2 O 3 as a PD based on nanorods (NRs) and thin films (TFs), which shows good photodetection capabilities. However, the reported PD needs an external power supply for its operation.…”

Section: Introductionmentioning

confidence: 99%

“…10 Among the metal oxides, gadolinium oxide (Gd 2 O 3 ) is a highly thermodynamically stable material having a high refractive index, wide band gap, and low lattice mismatch with Si. 11,12 Recently, authors have reported Gd 2 O 3 as a PD based on nanorods (NRs) 13 and thin films (TFs), 14 which shows good photodetection capabilities. However, the reported PD needs an external power supply for its operation.…”

Section: ■ Introductionmentioning

confidence: 99%

Self-Powered Photodetector Based on a Ag Nanoparticle-Decorated Gd₂O₃ Nanorod

Meitei

Singh

2023

ACS Appl. Electron. Mater.

Self Cite

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A self-powered photodetector based on a silver nanoparticle (Ag NP)-decorated gadolinium oxide nanorod (Gd 2 O 3 NR) has been deposited using the glancing angle deposition (GLAD) technique. Field emission gun scanning electron microscopy (FEG-SEM) and transmission electron microscopy (TEM) analyses confirm the successful growth of a Ag NP-decorated Gd 2 O 3 NR with polycrystalline nature. UV−vis spectroscopy reveals the presence of the Ag NP and Gd 2 O 3 NR with photon absorption in visible and UV regions. The electrical analysis was studied for the voltage range of −5 to 5 V. The device demonstrated self-powered characteristics with a significantly low dark current of 0.73 nA. In addition, the device also displayed a stable switching response with a rise/fall time of 0.18/0.17 s at 0 V. Moreover, the device obtained good responsivity (11.8 mA/W) with a high detectivity of 7.63 × 10 11 Jones and a low noise equivalent power of 3.67 × 10 −12 W at 0 V.

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Investigation on structural and photodetection properties of Gd2O3 thin films after annealing

Cited by 10 publications

References 39 publications

The Impact of the Amorphous-to-Crystalline Transition on the Upconversion Luminescence in Er3+-Doped Ga2O3 Thin Films

The Impact of the Amorphous-to-Crystalline Transition on the Upconversion Luminescence in Er3+-Doped Ga2O3 Thin Films

Pentacenequinone-Modulated 2D GdSn-PQ Nanosheets as a Fluorescent Probe for the Detection of Enrofloxacin in Biological and Environmental Samples

Self-Powered Photodetector Based on a Ag Nanoparticle-Decorated Gd₂O₃ Nanorod

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Investigation on structural and photodetection properties of Gd2O3 thin films after annealing

Cited by 10 publications

References 39 publications

The Impact of the Amorphous-to-Crystalline Transition on the Upconversion Luminescence in Er3+-Doped Ga2O3 Thin Films

The Impact of the Amorphous-to-Crystalline Transition on the Upconversion Luminescence in Er3+-Doped Ga2O3 Thin Films

Pentacenequinone-Modulated 2D GdSn-PQ Nanosheets as a Fluorescent Probe for the Detection of Enrofloxacin in Biological and Environmental Samples

Self-Powered Photodetector Based on a Ag Nanoparticle-Decorated Gd2O3 Nanorod

Contact Info

Product

Resources

About

Self-Powered Photodetector Based on a Ag Nanoparticle-Decorated Gd₂O₃ Nanorod