Indium Tin Oxide Thin Films Grown on Polyethersulphone (PES) Substrates by Pulsed-Laser Deposition for Use in Organic Light-Emitting Diodes

Kim, Kyung Hyun; Park, Nae Man; Kim, Tae Youb; Cho, Kwan Sik; Lee, Jeong Ik; Chu, Hye Yong; Sung, Gun Yong

doi:10.4218/etrij.05.0104.0166

Cited by 19 publications

(2 citation statements)

References 17 publications

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“…To confirm the electrical properties of the Si-QD devices, we further deposited an n-type amorphous SiC film ($300 nm) doped with a phosphorous, as well as indium tin oxide (ITO; $100 nm) layer on top of it. 17,18) The latter is to spread the current, thereby enhancing the current injection efficiency into the Si-QD. The n-type amorphous SiC layer was prepared by PECVD, in which argon-diluted 10% SiH 4 and CH 4 was used.…”

Section: Methodsmentioning

confidence: 99%

Effects of the Hole Tunneling Barrier Width on the Electrical Characteristic in Silicon Quantum Dots Light-Emitting Diodes

Kim

Park

Choi

et al. 2011

Jpn. J. Appl. Phys.

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Electrical properties of the Silicon quantum dots (Si-QD) light-emitting diodes (LEDs), in its dependence on the nitrogen source used in the silicon nitride (SiN x ) matrix growth, have been studied. Si-QDs are formed in-situ during the SiN x film growth, and no post-annealing process for crystallization was applied. To confirm the electrical properties of the Si-QD devices, we manufacture the Si-QD LED. Both p-type and p+-type Si substrate were tested in role of hole tunneling in the LED performance. The high-resolution transmission electron microscopy (HRTEM) analyses and the current–voltage (I–V) measurement show that the Si-QDs embedded in the SiN x grown with ammonia (NH3) are located at the interface between the SiN x film and the Si substrate. This is related to the observed increase in the forward current by considering a decrease in the hole tunneling barrier width between the Si substrate and the Si-QDs.

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Section: Methodsmentioning

confidence: 99%

Effects of the Hole Tunneling Barrier Width on the Electrical Characteristic in Silicon Quantum Dots Light-Emitting Diodes

Kim

Park

Choi

et al. 2011

Jpn. J. Appl. Phys.

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“…2 The doping process increases the conductivity of these oxides, while the higher band gap (>3 eV) ensures transparency in the visible portion of the spectrum. Thin film solar cells, 3 liquid crystal flat panel displays, 4 OLED displays, 5 and transparent high-mobility thin film transistors (TFTs) 6 are some applications of TCOs. Tindoped indium oxide (ITO), aluminum-doped zinc oxide (AZO), and fluorine-doped tin oxide (FTO) are some examples of widely used TCOs.…”

Section: ■ Introductionmentioning

confidence: 99%

Fluorine-Doped Tin Oxide Thin Films with High Surface Conductance and Low Transparency for Boosting Performance in Dye-Sensitized Solar Cell Applications

Kananke Udubokke Rathnayakage,

Bandara,

Wijayaratne

et al. 2023

ACS Appl. Energy Mater.

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Transparent conductive oxide films, like fluorine-doped tin oxide (FTO), are needed for electrochemical devices. FTO films are attractive due to their cost-effectiveness and high-temperature tolerance. Generally, solar cell fabrication requires high transmittance and low-conductivity FTOs. However, achieving both simultaneously poses a fundamental challenge. This study investigates the impact of FTO layer thickness, sheet resistance, transparency, and film morphology on optimizing the performance of dye-sensitized solar cells. To achieve this, a precursor solution containing SnCl 4 •5H 2 O and NH 4 F in isopropanol is sprayed onto a soda-lime glass substrate at 500 °C to form FTO films. The film thickness is varied by repeating the spray cycles. By increasing the number of spray cycles, the sheet resistance of the FTO film improves to ∼1.20 Ω □ −1 with the expense of transmittance. The achieved very low sheet resistance of ∼1 Ω □ −1 (∼3.54 × 10 −4 ) Ω cm resistivity for the FTO film confirms the promise of this sequential spray pyrolysis technique in preparing highly conductive inert electrodes for various applications. Furthermore, DSCs with low transparency and sheet resistance showed higher-energy conversion efficiencies, challenging the current prerequisite of the requirement of high transmittance. The best efficiency (5.14%) is achieved with FTO films having a 34.2% transmittance and a 3.27 Ω □ −1 sheet resistance, outperforming standard FTO films (4.74%) with a 10 Ω □ −1 sheet resistance and an ∼83% transmittance. The results indicate that the transparency of FTO is not a dominant factor and carefully controlled light scattering and electrical properties in translucent FTO films would lead to the realization of dye-sensitized solar cells that deliver superior efficiency.

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Development of Conformable Substrates for OLEDs Using Highly Transparent Bacterial Cellulose Modified with Recycled Polystyrene

Cebrian

Carvalho

Barreto

et al. 2021

Advanced Sustainable Systems

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Bacterial cellulose (BC) is a biocompatible and nontoxic biopolymer that has been successfully used as a substrate for flexible organic light emitting diodes (OLEDs). Although BC membranes exhibit excellent mechanical properties and industrial scalability, they are semitransparent, which limits their performance. To improve the optical properties of BC membranes, methods such as the polymerization of different inorganic–organic hybrid materials and petrochemical derivative monomers have been considered; however, these methods require considerable time and effort. In this work, transparent BC membranes for conformable OLEDs substrates are fabricated by spray coating a solution of recycled petrochemical plastics, found in expanded foam package wastes, and d‐limonene, which is a green solvent extracted from orange peels. This fabrication approach is highly scalable and can be considered a sustainable technique to develop high performance transparent substrates for photonic applications based on both recovered petrochemical polymers and naturally occurring biopolymers. In terms of the morphological and structural properties, the resulting transparent membranes exhibit a lower roughness than pristine BC. The resulting BC‐PS composite is used as a substrate for OLED fabrication. The conformable OLEDs exhibit a current efficiency of up to 5 cd A−1 (16 000 cd m−2) and power density of ≈2.8 mW cm−2.

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Indium Tin Oxide Thin Films Grown on Polyethersulphone (PES) Substrates by Pulsed-Laser Deposition for Use in Organic Light-Emitting Diodes

Abstract: , respectively, and the external quantum efficiency of the OLEDs was found to be 2.0 %.

Cited by 19 publications

References 17 publications

Effects of the Hole Tunneling Barrier Width on the Electrical Characteristic in Silicon Quantum Dots Light-Emitting Diodes

Effects of the Hole Tunneling Barrier Width on the Electrical Characteristic in Silicon Quantum Dots Light-Emitting Diodes

Fluorine-Doped Tin Oxide Thin Films with High Surface Conductance and Low Transparency for Boosting Performance in Dye-Sensitized Solar Cell Applications

Development of Conformable Substrates for OLEDs Using Highly Transparent Bacterial Cellulose Modified with Recycled Polystyrene

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