Full range optical and electrical properties of Zn-doped SnO2 and oxide/metal/oxide multilayer thin films deposited on flexible PET substrate

Cho, Yoon-Ho; Parmar, Narendra S.; Nahm, Sahn; Choi, Ji Won

doi:10.1016/j.jallcom.2016.09.293

Cited by 42 publications

(17 citation statements)

References 19 publications

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“…In contrast, as shown in Figure (b), transmittance at wavelength of 550 nm (Tr 550nm ) of the films gradually decreased from 88.4 to 86.5% for TiO 2 (10 nm) and from 86.9 to 82.4% for TiO 2 (20 nm) with an increase in the SiO 2 thickness from 10 to 120 nm. This deviation between the simulation and experimental data may originate from the pronounced effect of absorption, because the increase in SiO 2 thickness was much greater than the anti‐reflection effect of the IML . In addition, the actual film thicknesses may have been slightly different from the target thicknesses during the deposition process.…”

Section: Resultsmentioning

confidence: 92%

“…Transparent conductive electrodes (TCEs) are the core components of a variety of optoelectronic devices such as flexible displays, thin film transistors, solar cells, and touch screen panels . Among the different types of TCEs investigated, the oxide/metal/oxide (OMO) structured multilayer films are one of the most promising transparent conducting oxide (TCO) materials for applications requiring flexible TCEs; this is because of the excellent optical and electrical performance of these films in flexible TCEs, as well as their cost effectiveness .…”

Section: Introductionmentioning

confidence: 99%

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Investigation of SiO₂/TiO₂ Index Matching Layer Applied to MTO/Ag/MTO Structured Film Deposited on PET Substrate

Yoon

Kim

Jang

2018

Physica Status Solidi (a)

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For the commercial application of transparent conductive oxide (TCO) materials in touch screens, the incident light should be reflected at the interfaces between the stacked TCO layers having different refractive indices. To reduce optical loss, the presence of an index-matching (IM) passivation layer between the conductive layer and substrate is necessary. The objective of the present study is to evaluate and compare the effects of an IM layer (SiO 2 /TiO 2 ) on the optical spectra and color variation in the case of MTO/ Ag/MTO films with and without the SiO 2 /TiO 2 layers. The optical properties are systematically investigated using an ultraviolet (UV)-visible (Vis) spectrophotometer. The optical transmittance of all fabricated films is higher than 85% at the wavelength of 550 nm. The optimal thickness of the SiO 2 /TiO 2 layer is SiO 2 (90, 100 nm)/TiO 2 (10 nm). A low reflectance difference (ΔR 550nm ) of 1.5 and 1.3%, and the color difference representing the blueyellow color (Δb Ã ) of 0.6 and 3.1 are achieved with the optimal thickness of SiO 2 (90 and 100 nm)/TiO 2 (10 nm), respectively.

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Section: Resultsmentioning

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Investigation of SiO₂/TiO₂ Index Matching Layer Applied to MTO/Ag/MTO Structured Film Deposited on PET Substrate

Yoon

Kim

Jang

2018

Physica Status Solidi (a)

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“…The enhanced conductivity of Zn‐SnO 2 will reduce the hysteresis effect slightly. According to the previous study, Zn 2+ doped in the lattice interstitials can improve the n‐type conducting properties due to zinc interstitials (Zn i ), and native defects such as oxygen vacancies ( V o ) could acts as donors, which result in the decrease in resistivity of the SnO 2 thin film . From the test results, it is believed that there can be a certain number of zinc ions in the lattice interstitials.…”

Section: Resultsmentioning

confidence: 97%

“…The n‐type conduction can be improved by doping with Zn 2+ , this is due to the formation of zinc interstitials (Zn i ) and/or oxygen vacancies ( V o ), which can reduce the distance between the Fermi level and the conducting band resulting in improved conductivity . Simultaneously, the conductivity of the semiconductor can also be improved by reducing the defect density .…”

Section: Resultsmentioning

confidence: 99%

Low‐Temperature Electron Beam Deposition of Zn‐SnO_x for Stable and Flexible Perovskite Solar Cells

Song

Zhuang

et al. 2019

Solar RRL

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Perovskite solar cells (PSCs) attract tremendous interest due to their feasibility, high power conversion efficiency (PCE), light weight, and flexible architecture. However, some challenges are still present for cheap mass fabrication in commercial applications. Herein, efficient Zn‐SnOx electron transport layers (ETLs) are used by the low‐temperature (100 °C) electron beam (E‐beam) method. Doping Zn2+ in SnO2 improves conductivity, suppresses charge recombination, and optimizes the energy level structure of SnO2, leading to an improved PCE from 18.95% to 20.16%. More importantly, the PCE of the modified device is more than 80% of its initial values for 800 h in ambient air with a relative humidity of ≈40%. The flexible device exhibits a PCE of 15.25% and remains at an initial PCE of 83% after 100 bending cycles. The efficient and flexible PSCs are potentially used as wearable energy power sources. The low‐temperature preparation of ETL and the excellent performance of devices present great commercial potential for future applications.

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“…Metal-oxide thin films are being gradually investigated by many researchers in various fields. [1][2][3][4][5] Especially, nickel oxide (NiO) thin films have been used in various applications such as electrochromic devices, fuel cell electrodes, and functional sensors 6,7 because of their good electrochemical stability, durability, optical properties, and low cost. 8 Furthermore, stable LC alignment characteristics can be expected from adding a NiO thin film to a liquid crystal (LC) device.…”

Section: Introductionmentioning

confidence: 99%

Surface modified solution‐derived nickel oxide film via ion‐beam irradiation as a liquid crystal alignment layer

et al. 2019

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In this article, we demonstrate the liquid crystal (LC) alignment characteristics of solution‐derived nickel oxide (NiO) film modified with ion‐beam (IB) irradiation. Cross‐polarized optical microscopy and pretilt angle measurements verified that uniform LC alignment was achieved using the NiO film as an alignment layer regardless of IB incidence angle. Contact angle measurements revealed that all of the NiO films had a deionized water contact angle below 90°, which indicates that they had hydrophilic surfaces that had an effect on the homogeneous LC alignment. Atomic force microscopy was conducted to determine the physical surface modification due to the IB irradiation, which showed that it reduced the size of the surface grains with agglomerations depending on the surface tilt from the IB incidence angle. Furthermore, microgroove structures strongly related to uniform LC alignment were observed after IB irradiation. Chemical surface modification was investigated via an X‐ray photoelectron spectroscopy analysis which revealed that IB irradiation modified the chemical bonds in the NiO film, and this affected the LC alignment state. Thus, these results indicate that using NiO film exposed to IB irradiation as an alignment layer is a suitable method for LC applications.

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Full range optical and electrical properties of Zn-doped SnO2 and oxide/metal/oxide multilayer thin films deposited on flexible PET substrate

Cited by 42 publications

References 19 publications

Investigation of SiO₂/TiO₂ Index Matching Layer Applied to MTO/Ag/MTO Structured Film Deposited on PET Substrate

Investigation of SiO₂/TiO₂ Index Matching Layer Applied to MTO/Ag/MTO Structured Film Deposited on PET Substrate

Low‐Temperature Electron Beam Deposition of Zn‐SnO_x for Stable and Flexible Perovskite Solar Cells

Surface modified solution‐derived nickel oxide film via ion‐beam irradiation as a liquid crystal alignment layer

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Full range optical and electrical properties of Zn-doped SnO2 and oxide/metal/oxide multilayer thin films deposited on flexible PET substrate

Cited by 42 publications

References 19 publications

Investigation of SiO2/TiO2 Index Matching Layer Applied to MTO/Ag/MTO Structured Film Deposited on PET Substrate

Investigation of SiO2/TiO2 Index Matching Layer Applied to MTO/Ag/MTO Structured Film Deposited on PET Substrate

Low‐Temperature Electron Beam Deposition of Zn‐SnOx for Stable and Flexible Perovskite Solar Cells

Surface modified solution‐derived nickel oxide film via ion‐beam irradiation as a liquid crystal alignment layer

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Resources

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Investigation of SiO₂/TiO₂ Index Matching Layer Applied to MTO/Ag/MTO Structured Film Deposited on PET Substrate

Investigation of SiO₂/TiO₂ Index Matching Layer Applied to MTO/Ag/MTO Structured Film Deposited on PET Substrate

Low‐Temperature Electron Beam Deposition of Zn‐SnO_x for Stable and Flexible Perovskite Solar Cells