A trap-assisted ultrasensitive near-infrared organic photomultiple photodetector based on Y-type titanylphthalocyanine nanoparticles

2016 ◽  
Vol 4 (24) ◽  
pp. 5584-5592 ◽  
Author(s):  
Xiaolong Li ◽  
Shirong Wang ◽  
Yin Xiao ◽  
Xianggao Li
Keyword(s):  
Near Infrared ◽  
Dip Coating ◽  
Organic Photodetector

An ultrasensitive near-infrared organic photodetector with an EQE of 354 200% and a photoresponsivity of 2227 A W−1 has been fabricated by dip-coating.

scholarly journals Mode Sensitivity Exploration of Silica–Titania Waveguide for Refractive Index Sensing Applications

Sensors ◽  
2021 ◽  
Vol 21 (22) ◽  
pp. 7452
Author(s):  
Muhammad A. Butt ◽  
Andrzej Kaźmierczak ◽  
Cuma Tyszkiewicz ◽  
Paweł Karasiński ◽  
Ryszard Piramidowicz
Keyword(s):  
Refractive Index ◽  
High Performance ◽  
Near Infrared ◽  
Sol Gel ◽  
Cost Effective ◽  
Dip Coating ◽  
Infrared Wavelength ◽  
Refractive Index Sensing ◽  
Sensing Applications ◽  
Coating Method

In this paper, a novel and cost-effective photonic platform based on silica–titania material is discussed. The silica–titania thin films were grown utilizing the sol–gel dip-coating method and characterized with the help of the prism-insertion technique. Afterwards, the mode sensitivity analysis of the silica–titania ridge waveguide is investigated via the finite element method. Silica–titania waveguide systems are highly attractive due to their ease of development, low fabrication cost, low propagation losses and operation in both visible and near-infrared wavelength ranges. Finally, a ring resonator (RR) sensor device was modelled for refractive index sensing applications, offering a sensitivity of 230 nm/RIU, a figure of merit (FOM) of 418.2 RIU−1, and Q-factor of 2247.5 at the improved geometric parameters. We believe that the abovementioned integrated photonics platform is highly suitable for high-performance and economically reasonable optical sensing devices.

Control of Crystallinity in PbPc:C60 Blend Film and Application for Inverted Near-Infrared Organic Photodetector

2018 ◽  
Vol 10 (30) ◽  
pp. 25614-25620 ◽  
Author(s):  
Min-Soo Choi ◽  
Sangmin Chae ◽  
Hyo Jung Kim ◽  
Jang-Joo Kim
Keyword(s):  
Near Infrared ◽  
Blend Film ◽  
Organic Photodetector

Effect of Withdrawal Speed on the Structural, Optical and Morphological Properties of NiO Thin Films Obtained by Sol-Gel Dip Coating Method

2017 ◽  
Vol 31 ◽  
pp. 29-35 ◽  
Author(s):  
Abdelouahab Noua ◽  
Rebai Guemini ◽  
Hichem Farh ◽  
Mourad Zaabat
Keyword(s):  
Thin Films ◽  
Near Infrared ◽  
Sol Gel ◽  
Optical Transmittance ◽  
Dip Coating ◽  
Morphological Properties ◽  
Speed Increase ◽  
Withdrawal Speed ◽  
Coating Method ◽  
Dip Coating Method

In this study, pure nickel oxide thin films were prepared by a sol-gel dip coating method with different withdrawal speeds, onto glass substrates and their structural, optical and morphological properties were investigated. The structural properties of NiO films were characterized by X-ray diffraction (XRD), Polycrystalline structures of the prepared films were detected. The optical properties of the films were studied by UV–visible spectrophotometer and the optical transmittance of the films within the visible and near infrared region was found to be more than 75% and decrease when the withdrawal speed increase. The surface morphology of the films was observed by atomic force microscopy and it was found that the root mean square (RMS) roughness increases from 3.78 to 15 nm when the withdrawal speed increased from 30 to70 mm/min. Thus, the withdrawal speed is a key factor to change the NiO thin films properties.

scholarly journals A High‐Performance Solution‐Processed Organic Photodetector for Near‐Infrared Sensing

2019 ◽  
Vol 32 (1) ◽  
pp. 1906027 ◽  
Author(s):  
Jianfei Huang ◽  
Jaewon Lee ◽  
Joachim Vollbrecht ◽  
Viktor V. Brus ◽  
Alana L. Dixon ◽  
...  
Keyword(s):  
High Performance ◽  
Near Infrared ◽  
Solution Processed ◽  
Infrared Sensing ◽  
Organic Photodetector

Copper Thiocyanate as an Anode Interfacial Layer for Efficient Near-Infrared Organic Photodetector

2020 ◽  
Author(s):  
Zhenqiang Huang ◽  
Zhiming Zhong ◽  
Feng Peng ◽  
Lei Ying ◽  
Gang Yu ◽  
...  
Keyword(s):  
Interfacial Layer ◽  
Near Infrared ◽  
Organic Photodetector

scholarly journals Ag-Sensitized NIR-Emitting Yb3+-Doped Glass-Ceramics

2020 ◽  
Vol 10 (6) ◽  
pp. 2184
Author(s):  
Francesco Enrichi ◽  
Elti Cattaruzza ◽  
Tiziano Finotto ◽  
Pietro Riello ◽  
Giancarlo C. Righini ◽  
...  
Keyword(s):  
Near Infrared ◽  
Level Structure ◽  
Sol Gel ◽  
Glass Ceramics ◽  
Salt Bath ◽  
Dip Coating ◽  
Optical Measurements ◽  
Excitation Spectra ◽  
Energy Level Structure ◽  
Pl Emission

The optical photoluminescent (PL) emission of Yb3+ ions in the near infrared (NIR) spectral region at about 950–1100 nm has many potential applications, from photovoltaics to lasers and visual devices. However, due to their simple energy-level structure, Yb3+ ions cannot directly absorb UV or visible light, putting serious limits on their use as light emitters. In this paper we describe a broadband and efficient strategy for sensitizing Yb3+ ions by Ag codoping, resulting in a strong 980 nm PL emission under UV and violet-blue light excitation. Yb-doped silica–zirconia–soda glass–ceramic films were synthesized by sol-gel and dip-coating, followed by annealing at 1000 °C. Ag was then introduced by ion-exchange in a molten salt bath for 1 h at 350 °C. Different post-exchange annealing temperatures for 1 h in air at 380 °C and 430 °C were compared to investigate the possibility of migration/aggregation of the metal ions. Studies of composition showed about 1–2 wt% Ag in the exchanged samples, not modified by annealing. Structural analysis reported the stabilization of cubic zirconia by Yb-doping. Optical measurements showed that, in particular for the highest annealing temperature of 430 °C, the potential improvement of the material’s quality, which would increase the PL emission, is less relevant than Ag-aggregation, which decreases the sensitizers number, resulting in a net reduction of the PL intensity. However, all the Ag-exchanged samples showed a broadband Yb3+ sensitization by energy transfer from Ag aggregates, clearly attested by a broad photoluminescence excitation spectra after Ag-exchange, paving the way for applications in various fields, such as solar cells and NIR-emitting devices.

scholarly journals Transparent Organic Photodetector using a Near-Infrared Absorbing Cyanine Dye

2015 ◽  
Vol 5 (1) ◽  
Author(s):  
Hui Zhang ◽  
Sandra Jenatsch ◽  
Jelissa De Jonghe ◽  
Frank Nüesch ◽  
Roland Steim ◽  
...  
Keyword(s):  
Near Infrared ◽  
Cyanine Dye ◽  
Organic Photodetector

scholarly journals Low-Temperature Synthesis of Vanadium Dioxide Thin Films by Sol-Gel Dip Coating Method

2021 ◽  
Vol 2021 ◽  
pp. 1-7
Author(s):  
Ladawan Chotirat ◽  
Sutham Niyomwas ◽  
Witthawat Wongpisan ◽  
Sitthisuntorn Supothina
Keyword(s):  
Thin Films ◽  
Low Temperature ◽  
Vanadium Dioxide ◽  
Near Infrared ◽  
Sol Gel ◽  
Optical Transmittance ◽  
Dip Coating ◽  
Tube Furnace ◽  
Vacuum Tube ◽  
Synthesis Conditions

The vanadium dioxide (VO2) thin films were synthesized by sol-gel dipping on a glass slide substrate at low temperature of 500°C in a vacuum tube furnace at a pressure of 2 × 10−3 mbar by 2-step calcination without an intermediate gas purging. Synthesis conditions, including temperature, vacuum pressure, and calcination steps in the vacuum tube furnace, were investigated to find the optimum condition that promoted the formation of VO2 phase. It was found that the 2nd calcination step was very important in realizing the monoclinic vanadium dioxide (VO2 (M)). The results of the valence electron analysis revealed the outstanding phase of VO2 and a small amount of V2O5 and V2O3 phases. The small crystallites of the VO2 were homogeneously distributed on the surface, and the grain was of an irregular shape of ∼220−380 nm in size. The film’s thickness was in a range of 69−74 nm. The film exhibited a metal-to-insulator transformation temperature of ∼68oC and good thermochromic property. Visible optical transmittance remained at ∼40−50% when the sample’s temperature changed from 25 to 80°C for a near infrared (NIR) region.

Unsymmetrical Squaraine Dye-Based Organic Photodetector Exhibiting Enhanced Near-Infrared Sensitivity

2020 ◽  
Vol 124 (39) ◽  
pp. 21730-21739 ◽  
Author(s):  
Guruprasad M. Somashekharappa ◽  
Chinju Govind ◽  
Vijith Pulikodan ◽  
Megha Paul ◽  
Manoj A. G. Namboothiry ◽  
...  
Keyword(s):  
Near Infrared ◽  
Squaraine Dye ◽  
Organic Photodetector
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