Performance evaluation of transparent self-powered n-ZnO/p-NiO heterojunction ultraviolet photosensors

Salunkhe, Parashurama; Bhat, Prashant; Kekuda, Dhananjaya

doi:10.1016/j.sna.2022.113799

Cited by 28 publications

(10 citation statements)

References 41 publications

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“…This value is greater than the value previously reported for ZnO nanowires/CuCrO 2 junctions, where the authors reported a rectification ratio at ±1 V around 12 000. Furthermore, the rectification ratio reported in the presented work is slightly higher than the one recently reported for n-ZnO/p-NiO heterojunctions, around 10 5 . Nevertheless, the optical transmittance reported in our work, around 75%, is greater than the one reported for such devices, around 60%.…”

Section: Discussioncontrasting

confidence: 74%

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n-ZnO/Out-of-Stoichiometry p-CuCrO₂ Diodes for Efficient and Low-Cost Transparent Electronic Applications

Bottiglieri

Sekkat

Belmouhoub

et al. 2022

ACS Appl. Electron. Mater.

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In this work, we present the synthesis of high-performance transparent diodes based on p-type out-of-stoichiometry CuCrO2 and n-type ZnO thin films. The oxides were fabricated by scalable chemical deposition methods at low temperature and ambient pressure, without any further postdeposition annealing treatment. We report the optimization of the devices through the fine-tuning of the deposition parameters of the two layers, namely, the composition of the p-type semiconductor and the deposition temperature of the n-type counterpart, and their thorough characterization. UV–vis spectroscopy measurements highlighted the antireflection function of the ZnO layer, resulting in an optical transmittance of the junction above 75% in the visible range. In-depth XPS profile studies confirmed the absence of atomic diffusion between the different layers. The optimized junction between a nanocomposite Cu2O+CuCrO2 coupled with polycrystalline ZnO presents the highest rectification ratio reported in the literature for similar devices, with values greater than 105 between −2.5 and +2.5 V. These extremely high performances are attributed to the formation of intraband levels, due to the stoichiometry variation of the CuCrO2 phase and the low crystallinity of n-type ZnO. These results open many prospects for optoelectronics and are particularly promising for the transparent oxide electronics industry.

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Section: Discussioncontrasting

confidence: 74%

“…However, the optical properties in the visible range are still far from optimal, with low values of average total transmittance, around 40%, over the visible range. Moreover, NiO-based devices were also reported, 17 showing a rectifying characteristic in the order of 10 5 . However, this material is characterized by small carrier mobility.…”

Section: Introductionmentioning

confidence: 99%

n-ZnO/Out-of-Stoichiometry p-CuCrO₂ Diodes for Efficient and Low-Cost Transparent Electronic Applications

Bottiglieri

Sekkat

Belmouhoub

et al. 2022

ACS Appl. Electron. Mater.

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“…NiO is a promising ptype semiconductor with a wide and direct energy band gap (3.2−3.8 eV) and transparency in the visible light, which is often used as a hole transport layer in solar cells or lightemitting diodes. 26,27 simulation results indicate the key role of the NiO shell layer in the high performance of ZCN NW HPD. The research reported here suggests that ZCN core−shell−shell NW HPD is a promising candidate for high-performance UV−vis photodetection.…”

Section: Introductionmentioning

confidence: 96%

From UV to Vis Broadband Photodetectors Based on ZnO/CuO/NiO Core–Shell–Shell Heterojunction Nanostructures

Chen

Chu

et al. 2023

ACS Appl. Nano Mater.

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In recent years, with the development of wearable electronics, the demands for high-performance photodetectors with smaller size, lower power consumption, and higher sensitivity have increased remarkably. Photodetectors based on one-dimensional (1D) zinc oxide (ZnO) nanowires (NWs) have been intensively investigated owing to their geometrical nanostructure possessing a large surface-tovolume ratio, high carrier mobility, and adjustable optical absorption. However, ZnO NW photodetectors usually can only detect ultraviolet (UV) light, limiting their application in the field of photodetection. In this paper, a heterojunction photodetector (HPD) based on ZnO/CuO/NiO (ZCN) core−shell−shell NWs is reported. The nanoscale copper oxide (CuO) film is deposited on hydrothermally grown ZnO NWs as the visible light absorber. The nanoscale nickel oxide (NiO) shell layer is uniformly coated on the surface of ZnO/CuO NWs by spin coating, which improves the detection capability of the photodetector in the range of UVto-visible (UV−vis) significantly. Benefited from the large light absorption area provided by the 1D nanostructure and the type II band alignment, the ZCN NW HPD shows a fast response (rise/decay 0.12/0.22 s) and a large sensitivity of 18.65 mA/W under UV irradiation at a 0 V bias. Experimental and simulation results show the key role of NiO shell layer in ZCN NW HPD. Our results suggest core−shell−shell heterojunction nanostructures to develop high-performance photodetectors for next-generation UV−vis broadband photosensing applications.

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“…Therefore, ZnO/MO heterostructures have attracted increasing interest. [29][30][31] Many physical and chemical synthesis methods are used to prepare heterostructured systems, including sol-gel, hydrothermal, co-precipitation and spray pyrolysis. A. E. Ramírez et al 32 are synthesized mixed photocatalysts from transition metal oxides (TMOs), such as Cr 2 O 3 , MnO 2 , FeO, CoO, NiO, Cu 2 O, CuO, and ZnO by the sol-gel method.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and comparative study of the structural and optical properties of binary ZnO-based composites for environmental applications

et al. 2023

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Performance evaluation of transparent self-powered n-ZnO/p-NiO heterojunction ultraviolet photosensors

Cited by 28 publications

References 41 publications

n-ZnO/Out-of-Stoichiometry p-CuCrO₂ Diodes for Efficient and Low-Cost Transparent Electronic Applications

n-ZnO/Out-of-Stoichiometry p-CuCrO₂ Diodes for Efficient and Low-Cost Transparent Electronic Applications

From UV to Vis Broadband Photodetectors Based on ZnO/CuO/NiO Core–Shell–Shell Heterojunction Nanostructures

Synthesis and comparative study of the structural and optical properties of binary ZnO-based composites for environmental applications

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Performance evaluation of transparent self-powered n-ZnO/p-NiO heterojunction ultraviolet photosensors

Cited by 28 publications

References 41 publications

n-ZnO/Out-of-Stoichiometry p-CuCrO2 Diodes for Efficient and Low-Cost Transparent Electronic Applications

n-ZnO/Out-of-Stoichiometry p-CuCrO2 Diodes for Efficient and Low-Cost Transparent Electronic Applications

From UV to Vis Broadband Photodetectors Based on ZnO/CuO/NiO Core–Shell–Shell Heterojunction Nanostructures

Synthesis and comparative study of the structural and optical properties of binary ZnO-based composites for environmental applications

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n-ZnO/Out-of-Stoichiometry p-CuCrO₂ Diodes for Efficient and Low-Cost Transparent Electronic Applications

n-ZnO/Out-of-Stoichiometry p-CuCrO₂ Diodes for Efficient and Low-Cost Transparent Electronic Applications