Enhancement of Photoelectric Effect in Organic Dye Thin Film Cells by Surface Plasmon Excitation

2003 ◽  
Vol 796 ◽  
Author(s):  
Keizo Kato ◽  
Masaru Hirano ◽  
Kazunari Shinbo ◽  
Futao Kaneko ◽  
Takashi Wakamatsu
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Surface Plasmon ◽  
Short Circuit ◽  
Photoelectric Effect ◽  
Film Structure ◽  
Organic Dye ◽  
Attenuated Total Reflection ◽  
Kretschmann Configuration ◽  
Photoelectric Properties

ABSTRACTPhotoelectric properties have been investigated for the organic dye thin film cells utilizing surface plasmon (SP) excitation. The cells fabricated in this work had a prism/Al thin film/copper phtalocyanine (CuPc) thin film/Ag thin film structure, which was the Kretschmann configuration in the attenuated total reflection (ATR) method. Since the CuPc thin film exhibits p-type conduction, the Schottky and Ohmic contacts can be obtained at the interfaces between the CuPc and Al thin films and between the CuPc and Ag thin films, respectively, and the cells used in this work show photoelectric properties. The ATR and short-circuit photocurrent properties have been simultaneously measured as a function of the incident angles of the laser beams. The experimental and calculated results of the ATR and short-circuit photocurrent properties and the optical absorptions of the organic dye layers were discussed. It was found that the photoelectric effect in the organic dye thin film cells the Kretschmann configuration in the ATR method was enhanced by the SP excitation.

Molecular thin film structure and multiple surface plasmon excitations at nano-interfaces in the attenuated total reflection Kretschmann configuration

2003 ◽  
Vol 438-439 ◽  
pp. 108-113 ◽  
Author(s):  
Futao Kaneko ◽  
Wataru Saito ◽  
Toshiharu Sato ◽  
Hirotsugi Hatakeyama ◽  
Kazunari Shinbo ◽  
...  
Keyword(s):  
Thin Film ◽  
Surface Plasmon ◽  
Film Structure ◽  
Total Reflection ◽  
Attenuated Total Reflection ◽  
Thin Film Structure ◽  
Kretschmann Configuration

Photoelectric Cells of Merocyanine Langmuir-Blodgett Films Utilizing Surface Plasmon Excitations

2001 ◽  
Vol 708 ◽  
Author(s):  
Keizo Kato ◽  
Futoshi Takahashi ◽  
Kazunari Shinbo ◽  
Futao Kaneko ◽  
Takashi Wakamatsu
Keyword(s):  
Thin Films ◽  
Surface Plasmon ◽  
Short Circuit ◽  
Schottky Diodes ◽  
Attenuated Total Reflection ◽  
Dielectric Constants ◽  
Type I ◽  
Type Ii ◽  
Lb Films ◽  
Langmuir Blodgett

ABSTRACTShort-circuit photocurrents (ISC) due to surface plasmon (SP) excitations have been investigated for the photoelectric cells using Langmuir-Blodgett (LB) films of merocyanine (MC) dye. The MC dye exhibits p-type conduction, and the Schottky and Ohmic contacts are obtained at the interfaces between MC LB films and Al thin films and between MC LB films and Ag thin films, respectively. Since the Schottky diodes show the photoelectric effects, the Schottky photoelectric cells have been constructed. The cells with two kinds of structures, that is, prism/Al/MC/Ag (type I) and prism/MgF2/Al/MC/Ag (type II), have been prepared. In the attenuated total reflection (ATR) method, the types I and II have the Kretschmann and both the Kretschmann and Otto configurations, respectively. SP has been resonantly excited at the interface between Ag and air for the type I and at the interfaces between MgF2 and Al between Ag and air for the type II. The ATR and the ISC properties have been simultaneously measured as a function of the incident angles of the laser beams. The peaks of the ISC have corresponded to the resonant angles of the ATR curves. The electric fields and optical absorptions in the cells have been also calculated using the dielectric constants and the film thicknesses obtained from the ATR measurements. The calculated absorptions in the MC layers as a function of the incident angles have corresponded to the results of ISC. It has been estimated that the ISC for both types I and II could be enhanced by the excitations of SP in the ATR configurations.

Surface Plasmon Excitations and Emission Light due to Molecular Luminescence on Metal Thin Film

2004 ◽  
Vol 846 ◽  
Author(s):  
Futao Kaneko ◽  
Susumu Toyoshima ◽  
Yasuo Ohdaira ◽  
Kazunari Shinbo ◽  
Keizo Kato
Keyword(s):  
Thin Film ◽  
Metal Surface ◽  
Surface Plasmon ◽  
Organic Dye ◽  
Dye Molecules ◽  
Kretschmann Configuration ◽  
Metal Thin Film ◽  
Direct Irradiation ◽  
Molecular Luminescence ◽  
Emission Light

ABSTRACTEmission light due to surface plasmon (SP) excitations has been investigated in Kretschmann configuration of prism/metal thin film/organic dye thin films by means of direct irradiation of a laser beam from air to the films. Emission light through the prism coincided with the resonant conditions of SP excitations in the configuration. It was thought that SPs on the metal surface were excited by luminescence of dye molecules close to the metal surface, and the SPs propagating along the metal surface were converted to the emission light according to the resonant conditions of SPs in the configuration. Intensities and spectra of the SP emission light through the prism strongly depended upon emission angles, nanostructures of dye films, the film thickness and mixture of two kinds of dyes.

GENERATION OF ULTRASHORT ELECTRON BUNCHES IN NANOSTRUCTURES BY FEMTOSECOND LASER PULSES

2007 ◽  
Vol 17 (03) ◽  
pp. 571-576
Author(s):  
A. GLADUN ◽  
V. LEIMAN ◽  
A. ARSENIN ◽  
O. MANNOUN ◽  
V. TARAKANOV
Keyword(s):  
Thin Film ◽  
Laser Radiation ◽  
Femtosecond Laser ◽  
Electric Field ◽  
Surface Plasmon ◽  
Laser Pulses ◽  
Photoelectric Effect ◽  
Femtosecond Laser Pulses ◽  
Electron Bunches ◽  
Internal Photoelectric Effect

We present numerical investigation of anomalous internal photoelectric effect which is realized in thin film (< 100 nm) structures by surface plasmon (SP) excitation and its interaction with primary laser radiation. SP electric field gain and electron temperature in the SP field have been calculated.

Emission Light Properties from Ag/Rhodamine-B LB Films Due to Surface Plasmon Excitations in the Kretschmann and Reverse Configurations

2000 ◽  
Vol 660 ◽  
Author(s):  
T. Nakano ◽  
H. Kobayashi ◽  
K. Shinbo ◽  
K. Kato ◽  
F. Kaneko ◽  
...  
Keyword(s):  
Surface Plasmon ◽  
Rhodamine B ◽  
Emission Angle ◽  
Attenuated Total Reflection ◽  
Peak Wavelength ◽  
Resonant Condition ◽  
Lb Films ◽  
Langmuir Blodgett ◽  
Kretschmann Configuration ◽  
Emission Light

ABSTRACTEmission light from Ag/ Rhodamine-B (RB) Langmuir-Blodgett (LB) films due to surface plasmon (SP) excitations has been investigated using the Kretschmann configuration of the attenuated total reflection (ATR) method and the reverse irradiation of laser beam from air to the samples. The conventional photoluminescence (PL) of the RB LB films showed a broad spectrum and the peak wavelength was about 600 nm. In the reverse irradiation, emission light was observed through the prism, and the intensities and the spectra strongly depended upon the emission angle where the light was observed. The wavelengths of the emission light became shorter as the emission angles increased. The relation between the wavelength and the emission angle agreed with the resonant condition of excitations of SPs in the Kretschmann configuration of ATR method. It was concluded that the emission light was caused by excitations of multiple SPs at the Ag/RB LB films.

scholarly journals A Wedge-Shaped Au Thin Film: Integrating Multiple Surface Plasmon Resonance Sensors in a Single Chip and Enhancing the Figure of Merit

2021 ◽  
Vol 3 ◽  
Author(s):  
Hiromasa Shimizu ◽  
Takahiro Ogura ◽  
Takumi Maeda ◽  
Shogo Suzuki
Keyword(s):  
Thin Film ◽  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Figure Of Merit ◽  
Refractive Index Change ◽  
Electron Beam Evaporation ◽  
Attenuated Total Reflection ◽  
Single Chip ◽  
Au Thin Film

We show here the design, fabrication, and characterization of a wedge-shaped Au thin film with an enhanced figure of merit (FOM). This is achieved by using a reflectivity change in an attenuated total reflection (ATR) setup by slightly modulating the wavenumber of the surface plasmon polariton by means of the varying thickness of the Au thin film. The wedge-shaped Au thin film is equivalent to multiple surface plasmon resonance (SPR) transducers integrated in a single chip and was fabricated by an electron-beam evaporation process with the position of the shutter controlled during the deposition. The FOM, defined as the difference between the maximum and minimum values of the normalized reflectivity change (ΔR/R) divided by the corresponding difference of the incident angles, was 8.0-times larger than that based on the reflectivity R. Also, we demonstrated that the wedge-shaped Au thin film was able to detect ethanol gas at a concentration of 0.2%, corresponding to a refractive index change of 2 × 10−5, without any surface functionalization. Since the sensing signal can be obtained with a single image from the wedge-shaped Au thin film without precise thickness control of the metal thickness, no other materials or modulation equipment is necessary, and the sensing chip can be employed in simple and highly sensitive systems.

scholarly journals Investigation of optical and photoelectric properties of poly (ohydroxyamide) sensitized by phthalocyanine as a perspective material for solar cells

2020 ◽  
Vol 220 ◽  
pp. 01019
Author(s):  
Elvira Fazalova ◽  
Konstantin Kochunov ◽  
Elena Bodyago ◽  
Georgii Konoplev ◽  
Nikolay Mukhin ◽  
...  
Keyword(s):  
Thin Films ◽  
Solar Radiation ◽  
Near Infrared ◽  
Wavelength Region ◽  
Organic Dye ◽  
Glass Substrates ◽  
Photoelectric Properties ◽  
Zinc Phthalocyanines ◽  
Infrared Spectral ◽  
Potential Use

Optical and photoelectric properties of poly (ohydroxyamide) (PHA) sensitized with zinc phthalocyanines were investigated in the visible and near infrared spectral regions. The structures were deposited on glass substrates by centrifugation and subsequent drying of a PHA film without thermal annealing. Optical spectra revealed characteristic absorption peaks of phthalocyanine in the longer wavelength region at 620-640 nm and 680-700 nm; absorption of the PHA matrix monotonously increases to the shorter wavelengths starting from 700 nm. Measurements of the photocurrent under irradiation with a high-power LED at a wavelength 630 nm showed photoconductivity related to the organic dye; photoconductivity also was observed while irradiated at 540 nm, presumably due to the absorption of PHA matrix. For non-sensitized (dye-free) PHA films no detectable photocurrents were produced by 630 nm irradiation. It was shown that introducing of phthalocyanines significantly improves optical absorption and photoconductivity of PHA thin films at the wavelengths, where the maximum in the spectral distribution of solar radiation lies. It was concluded that phthalocyanine-sensitized PHA has the potential use as a photosensitive organic material for solar applications, for example in developing composite organicinorganic structures with ferroelectrics.

scholarly journals Effect of RF Power on the Properties of Sputtered-CuS Thin Films for Photovoltaic Applications

Energies ◽  
2020 ◽  
Vol 13 (3) ◽  
pp. 688 ◽  
Author(s):  
Donghyeok Shin ◽  
SangWoon Lee ◽  
Dong Ryeol Kim ◽  
Joo Hyung Park ◽  
Yangdo Kim ◽  
...  
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Binding Energy ◽  
Indium Tin Oxide ◽  
Short Circuit ◽  
Film Surface ◽  
Binding Energies ◽  
Tin Sulfide ◽  
Rf Power ◽  
Deposition Power

Copper sulfide (CuS) thin films were deposited on a glass substrate at room temperature using the radio-frequency (RF) magnetron-sputtering method at RF powers in the range of 40–100 W, and the structural and optical properties of the CuS thin film were investigated. The CuS thin films fabricated at varying deposition powers all exhibited hexagonal crystalline structures and preferred growth orientation of the (110) plane. Raman spectra revealed a primary sharp and intense peak at the 474 cm−1 frequency, and a relatively wide peak was found at 265 cm−1 frequency. In the CuS thin film deposited at an RF power of 40 W, relatively small dense particles with small void spacing formed a smooth thin-film surface. As the power increased, it was observed that grain size and grain-boundary spacing increased in order. The binding energy peaks of Cu 2p3/2 and Cu 2p1/2 were observed at 932.1 and 952.0 eV, respectively. Regardless of deposition power, the difference in the Cu2+ state binding energies for all the CuS thin films was equivalent at 19.9 eV. We observed the binding energy peaks of S 2p3/2 and S 2p1/2 corresponding to the S2− state at 162.2 and 163.2 eV, respectively. The transmittance and band-gap energy in the visible spectral range showed decreasing trends as deposition power increased. For the CuS/tin sulfide (SnS) absorber-layer-based solar cell (glass/Mo/absorber(CuS/SnS)/cadmium sulfide (CdS)/intrinsic zinc oxide (i-ZnO)/indium tin oxide (ITO)/aluminum (Al)) with a stacked structure of SnS thin films on top of the CuS layer deposited at 100 W RF power, an open-circuit voltage (Voc) of 115 mA, short circuit current density (Jsc) of 9.81 mA/cm2, fill factor (FF) of 35%, and highest power conversion efficiency (PCE) of 0.39% were recorded.

NANOSTRUCTURED LB FILMS AND EMISSION LIGHT DUE TO MULTIPLE SURFACE PLASMON EXCITATIONS IN THE KRETSCHMANN CONFIGURATION

2002 ◽  
Vol 01 (05n06) ◽  
pp. 409-414
Author(s):  
FUTAO KANEKO ◽  
MITSURU TERAKADO ◽  
TOSHIHARU SATO ◽  
HIROTSUGI HATAKEYAMA ◽  
WATARU SAITO ◽  
...  
Keyword(s):  
Laser Beam ◽  
Surface Plasmon ◽  
Total Reflection ◽  
Attenuated Total Reflection ◽  
Dye Molecules ◽  
Lb Films ◽  
Langmuir Blodgett ◽  
Kretschmann Configuration ◽  
Direct Irradiation ◽  
Emission Light

Surface plasmon (SP) excitations have been investigated in the attenuated total reflection (ATR) Kretschmann configuration of prism/metal/Langmuir–Blodgett (LB) films containing dyes. The emission light through the prism was observed using direct irradiation of a laser beam from air to the LB films, i.e., reverse irradiation. The emission intensities depend on the emission angles through the prism, nanostructure of metal and LB films, dye molecules, separation between metal and dye molecules, interactions of dye molecules, etc. The spectra is strongly depended on the emission angles, and the emission light was caused by multiple SP excitations. Nanostructured devices of LB films using SP excitations are described.

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