Near-infrared Photoelectric Conversion by Singlet–Triplet Transition of the Iminopyridine Ru(II) Complex

2018 ◽  
Vol 47 (10) ◽  
pp. 1311-1313 ◽  
Author(s):  
Takumi Kinoshita ◽  
Hiroshi Segawa
Keyword(s):  
Near Infrared ◽  
Photoelectric Conversion ◽  
Triplet Transition

Visible to Near-Infrared Photoelectric Conversion in a Dye-Sensitized Solar Cell Using Ru(II) Porphyrin with Azopyridine Axial Ligands

2012 ◽  
Vol 51 ◽  
pp. 10NE02 ◽  
Author(s):  
Takumi Kinoshita ◽  
Jun-ichi Fujisawa ◽  
Jotaro Nakazaki ◽  
Satoshi Uchida ◽  
Takaya Kubo ◽  
...  
Keyword(s):  
Solar Cell ◽  
Near Infrared ◽  
Dye Sensitized Solar Cell ◽  
Photoelectric Conversion ◽  
Dye Sensitized ◽  
Axial Ligands

Metallic tungsten carbide nanoparticles as a near-infrared-driven photocatalyst

2019 ◽  
Vol 7 (31) ◽  
pp. 18538-18546 ◽  
Author(s):  
Weicheng Huang ◽  
Hongxue Meng ◽  
Yan Gao ◽  
Jinxin Wang ◽  
Chunyu Yang ◽  
...  
Keyword(s):  
Photocatalytic Degradation ◽  
Tungsten Carbide ◽  
Organic Pollutants ◽  
Near Infrared ◽  
Photoelectric Conversion ◽  
Full Spectrum ◽  
Lspr Effect

In this study, we present the LSPR effect and full spectrum photoabsorption of metallic WC for the direct NIR-driven photoelectric conversion and photocatalytic degradation of organic pollutants.

scholarly journals Cosensitization Properties of Glutathione-Protected Au25Cluster on Ruthenium Dye-Sensitized TiO2Photoelectrode

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
Kazuya Nakata ◽  
Sho Sugawara ◽  
Wataru Kurashige ◽  
Yuichi Negishi ◽  
Morio Nagata ◽  
...  
Keyword(s):  
Near Infrared ◽  
Adsorption Property ◽  
Optical Absorption Spectroscopy ◽  
Ionization Mass ◽  
Laser Desorption Ionization ◽  
Photoelectric Conversion ◽  
Dye Sensitized ◽  
Ru Complex ◽  
Transmission Electron ◽  
Ruthenium Dye

Cosensitization by glutathione-protected Au25clusters on Ru complex, N719-sensitized TiO2photoelectrodes is demonstrated. Glutathione-protected Au25clusters showed no significant changes in properties after adsorption onto TiO2particles, as confirmed by optical absorption spectroscopy, transmission electron microscopy, and laser desorption/ionization mass spectrometry. Adsorption property of the glutathione-protected Au25clusters depends on the pH, which affects the incident photon-to-current conversion efficiency (IPCE) of the TiO2photoelectrode containing Au25clusters. When pH < 5, the IPCE increases with pH. Conversely, the IPCE decreases with pH when pH > 7. The IPCE of a TiO2photoelectrode sensitized by both glutathione-protected Au25clusters and N719 was increased compared with photoelectrodes containing either glutathione-protected Au25clusters or N719, which suggests that glutathione-protected Au25clusters act as a coadsorbent for N719 on TiO2photoelectrodes. This is also supported by the results that the IPCE of N719-sensitized TiO2photoelectrodes increased upon addition of glutathione. Furthermore, cosensitization by glutathione-protected Au25clusters on N719-sensitized TiO2photoelectrodes allows that wavelength of photoelectric conversion was extended to the near infrared (NIR) region. These results suggest that glutathione-protected Au25clusters act not only as a coadsorbent to increase IPCE but also as an NIR-active sensitizer.

Investigations on Hydrothermally Prepared Tin Mono-Sulphide Nanoparticles

2017 ◽  
Vol 17 ◽  
pp. 79-87 ◽  
Author(s):  
L. Ansel Mely ◽  
P. Annie Vinosha ◽  
M. Mary Jaculine ◽  
D.J. Vidhya Raj ◽  
K. Raja ◽  
...  
Keyword(s):  
Band Gap ◽  
Near Infrared ◽  
Hydrothermal Reaction ◽  
Scientific Information ◽  
Optical Absorption Coefficient ◽  
Photoelectric Conversion Efficiency ◽  
Photoelectric Conversion ◽  
Tin Chloride ◽  
Transmission Electron ◽  
Direct Band

Optically active, tin mono-sulphide (SnS) nanoparticles, having generic name herzenbergite, being one of the narrow band gap IV–VI semiconductors, geared up recently the attention of material scientists for its applications in photovoltaics, near-infrared detectors, and biomedical applications where strong scientific information on infrared absorption is required. Among the class of chalcopyrite semiconductors, SnS is a relatively inexpensive and non-toxic material with the nature of resource abundance for solar cell applications, having a bulk direct band gap of 1.3 eV and indirect bandgap of 1.1 eV, possessing high figure of merit such as optimum optical band gap, high optical absorption coefficient for photons and high photoelectric conversion efficiency of up to 25%. In the present work, nanostructured SnS particles of 11.75 nm were synthesized by means of a cinch hydrothermal reaction using the reagents tin chloride pentahydrate and thiourea at 200°C. The crystallinity, purity, morphology, and structural featuresof as-prepared nanoparticles were characterized by Powder X-ray Diffraction (XRD), Transmission Electron Microscope (TEM), UV-visible spectroscopy (Uv-vis), Photoluminescence spectroscopy (PL) and Fourier Transform Infra-red Spectroscopy (FTIR). XRD measurements reveal the formation of well-crystallized orthorhombic tin mono-sulphide nanoparticles which may be considered as a distorted NaCl structure. TEM observations demonstrate the morphology of the nanoparticles. The FTIR examination confirmed the existence of the vital functional groups. Absorption spectrum showed that the nanoparticles have an extensive absorption array. The optical properties determined by Uv-vis and PL measurements show that the prepared SnS nanoparticles will be an ideal candidate for photovoltaic applications.

Visible to Near-Infrared Photoelectric Conversion in a Dye-Sensitized Solar Cell Using Ru(II) Porphyrin with Azopyridine Axial Ligands

2012 ◽  
Vol 51 (10S) ◽  
pp. 10NE02 ◽  
Author(s):  
Takumi Kinoshita ◽  
Jun-ichi Fujisawa ◽  
Jotaro Nakazaki ◽  
Satoshi Uchida ◽  
Takaya Kubo ◽  
...  
Keyword(s):  
Solar Cell ◽  
Near Infrared ◽  
Dye Sensitized Solar Cell ◽  
Photoelectric Conversion ◽  
Dye Sensitized ◽  
Axial Ligands

Fast Photoelectric Conversion in the Near‐Infrared Enabled by Plasmon‐Induced Hot‐Electron Transfer

2019 ◽  
Vol 31 (43) ◽  
pp. 1903829 ◽  
Author(s):  
Yuanfang Yu ◽  
Yue Sun ◽  
Zhenliang Hu ◽  
Xuhong An ◽  
Dongming Zhou ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Near Infrared ◽  
Hot Electron ◽  
Photoelectric Conversion ◽  
Hot Electron Transfer

Construction of a near-infrared responsive upconversion nanoplatform against hypoxic tumors via NO-enhanced photodynamic therapy

Nanoscale ◽  
2020 ◽  
Vol 12 (14) ◽  
pp. 7875-7887 ◽  
Author(s):  
Ying Lan ◽  
Xiaohui Zhu ◽  
Ming Tang ◽  
Yihan Wu ◽  
Jing Zhang ◽  
...  
Keyword(s):  
Photodynamic Therapy ◽  
Near Infrared ◽  
Upconversion Nanoparticles

A near-infrared (NIR) activated theranostic nanoplatform based on upconversion nanoparticles (UCNPs) is developed in order to overcome the hypoxia-associated resistance in photodynamic therapy by photo-release of NO upon NIR illumination.

A nitroreductase-activatable near-infrared theranostic photosensitizer for photodynamic therapy under mild hypoxia

2020 ◽  
Vol 56 (43) ◽  
pp. 5819-5822
Author(s):  
Jing Zheng ◽  
Yongzhuo Liu ◽  
Fengling Song ◽  
Long Jiao ◽  
Yingnan Wu ◽  
...  
Keyword(s):  
Photodynamic Therapy ◽  
Triplet State ◽  
Near Infrared ◽  
Mild Hypoxia

In this study, a near-infrared (NIR) theranostic photosensitizer was developed based on a heptamethine aminocyanine dye with a long-lived triplet state.

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