Optical Properties of Sputtered Indium-tin-oxide Thin Films

Kang, Manil; Kim, Inkoo; Chu, Minwoo; Kim, Sok Won; Ryu, Ji-Wook

doi:10.3938/jkps.59.3280

Cited by 42 publications

(19 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As shown in Fig. 6, the transmittance of the ITO film remains > 80% when the wavelength is above 390 nm, which is comparable to commercial and other reports [15,16]. Assuming that the incident light is the sum of the light reflected, transmitted and absorbed, it can be roughly calculated how many percentage of light absorbed by the ITO film.…”

Section: Contributed Articlesupporting

confidence: 62%

Effect of an ITO current spreading layer on the performance of InGaN MQW solar cells

Bai

Athanasiou

Wang

2016

Phys. Status Solidi C

View full text Add to dashboard Cite

InGaN‐based solar cells have been investigated through fabrication with and without using an indium‐tin‐oxide (ITO) current spreading layer (CSL). For the devices with a planar top surface, utilization of the ITO CSL leads to enhanced performance under 1 sun air‐mass 1.5 global spectrum illumination. In contrast, when surface‐texturing is applied to significantly improve the light absorption, the efficiency of the device without using the ITO CSL is higher compared to the one with the ITO. Furthermore, measurements on reflectance of the corresponding surfaces and transmission of the ITO CSL are carried out. The influence of the ITO CSL has been discussed in terms of surface reflection, the light loss due to the ITO CSL shading and the power loss associated with the absence of the ITO CSL. (© 2015 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

show abstract

Section: Contributed Articlesupporting

confidence: 62%

Effect of an ITO current spreading layer on the performance of InGaN MQW solar cells

Bai

Athanasiou

Wang

2016

Phys. Status Solidi C

View full text Add to dashboard Cite

show abstract

“…For evaluating the performance of GMZO TCO in this work, this study employed the Figure of merit (Φ TC ), expressed as Φ TC = T 10 /R S , where T is the average transmittance in a visible wavelength region (400–1100 nm), and R S is the sheet resistance of the TCO structure. The sheet resistance is defined by R S = ρ/ t , where ρ is the electrical resistivity in Ω‐cm and t is the thin film thickness of 300 nm . Therefore, the Φ TC is calculated as 43.2 and 8.2 × 10 −3 Ω −1 for Samples A and B at annealing temperatures of 700°C and 800°C, respectively.…”

Section: Resultsmentioning

confidence: 99%

Improved Crystal Quality of Transparent Conductive Ga‐doped ZnO Films by Magnesium Doping Through Radio‐Frequency Magnetron Sputtering Preparation

Liu

Chen

et al. 2014

J. Am. Ceram. Soc.

View full text Add to dashboard Cite

This study investigates the enhanced structural, and optoelectronic properties of transparent conductive Ga-doped Mg x Zn 1 -x O (GMZO) thin films with a varied magnesium (Mg) composition of 2% and 8%, respectively. The X-ray diffraction (XRD) measurements revealed that GMZO with an 8% Mg composition shows a stronger (002) diffraction intensity and narrower linewidth than that with a 2% Mg composition. Improved crystallinity and enlarged grain size in the postgrowth thermal annealed GMZO thin films were also observed in XRD and morphological measurements by atomic force microscopy. Photoluminescence measurements were conducted to investigate the improved GMZO thin-film quality, and the oxygen vacancy signal was found to decrease with increased Mg content, consistent with Xray photoelectron spectroscopy measurements. This study also shows high optical transmittance over 98%, and a low resistivity of 5.7 3 10 -4 ΩÁcm in Ga-doped Mg x Zn 1 -x O (x = 0.02) thin film, which indicates the highly promising candidate for use in optoelectronic devices.

show abstract

“…ITO has small absorbance peaks at 445 nm, 550 nm, and 725 nm that filters light harvestable by solar cells. 2 The FT-IR spectra of MWCNT composite films shown by Figure 7 shows absorption peaks at 1150, 1200, 1220 1225, 1230, Other studies have shown severe oxidation of MWCNTs using X-ray photoelectron spectroscopy (XPS). 27 They have identified oxygen within the MWCNT structure; alcohol groups, ethers, carboxylic acids, and ketones.…”

Section: Depositionmentioning

confidence: 98%

Carbon Nanotube Composite Mesh Film with Tunable Optoelectronic Performance

Dushatinski

Abdel‐Fattah

2015

ECS J. Solid State Sci. Technol.

View full text Add to dashboard Cite

In this study we fabricated novel transparent composite electrodes based on multi-walled carbon nanotubes (MWCNTs) and sodium dodecyl sulfate (SDS). The target optoelectronic properties of the flexible composite films are ± 100 /sq at 77% transmission of 550 nm light based on the properties of indium tin oxide (ITO) films on poly-ethylene terephthalate (PET). The optical properties of the MWCNTs composite thin films were measured in the UV-Vis and IR regions. The corresponding band-gap of composite films was 3.82 eV and complementary to the band-gaps' of dye-sensitized and organic solar cell components. The band-gaps of films deposited between 30 minutes and 60 minutes were tunable. Composite films over PET had tunable transparency of 550 nm light from 85% to 83% to 80%. The respective resistivities were 1141 /sq, 378 /sq and 110 /sq with an inverse exponential relationship between transparency and resistivity. Preferential deposition of MWCNT composites was demonstrated by low coverage on glass substrates and dense coverage on PET substrates. The roughness (Ra) of the MWCNT composites over PET was 20.40 nm as compared to 0.70 nm for indium tin oxide (ITO) depositions over glass.Materials with high transparency, flexibility, and conductivity are important for progressing optoelectronic devices. 1,7,9 Ideally transparent electrodes would be highly transparent, easily fabricated, and serve as efficient electron acceptors with low resistivity. 1,7 Current optoelectronics use metal oxides as conductive electrodes, the most common material being indium tin oxide (ITO). ITO electrodes deposited on flexible PET substrates (Sigma-Aldrich), have exceptional optoelectronic properties: 100 /sq at 77% transmittance of 550 nm light. ITO has been shown to have tunable band-gap of 3.27 to 3.75 eV and minimal absorption peaks in the UV-NIR regions; at 450 nm, 550 nm, 725 nm and 1100 nm. 2,6 These properties make ITO an optimal electrode currently for solar cells and displays. 1,23-26 Limitations of ITO electrodes such as their brittleness and scarcity of indium metal have prevented their applications in flexible devices. 5 Flexing of ITO electrodes alters the homogenous coverage over the flexible substrate resulting in cracking and reduced performance over time. 7,9 With progressive flexible designs of optoelectronics, there is a need for flexible electrode materials on flexible substrates with similar performance to ITO. [5][6][7]10,14,15 Carbon nanotubes (CNTs) have been used in many applications because of their mechanical, thermal, and electronic properties. In particular, CNTs have been incorporated into the solar cell active layers and as composite electrodes. 4-18 The conductivity of arm-chair type single walled carbon nanotubes (SWCNTs) allows for hole mobility along the conjugated 1-dimensional (1 D) structure. 4-18 The mechanical properties of CNTs also allow for film flexibility without significant damage. [8][9][10][11] Multi-walled carbon nanotubes demonstrate optical properties similar to that of arm-chair SWCNTs ...

show abstract

Optical Properties of Sputtered Indium-tin-oxide Thin Films

Cited by 42 publications

References 1 publication

Effect of an ITO current spreading layer on the performance of InGaN MQW solar cells

Effect of an ITO current spreading layer on the performance of InGaN MQW solar cells

Improved Crystal Quality of Transparent Conductive Ga‐doped ZnO Films by Magnesium Doping Through Radio‐Frequency Magnetron Sputtering Preparation

Carbon Nanotube Composite Mesh Film with Tunable Optoelectronic Performance

Contact Info

Product

Resources

About