316results about How to "High absorption coefficient" patented technology

A solid-state imaging device includes a substrate having a first surface and a second surface, light being incident on the second surface side; a wiring layer disposed on the first surface side; a photodetector formed in the substrate and including a first region of a first conductivity type; a transfer gate disposed on the first surface of the substrate and adjacent to the photodetector, the transfer gate transferring a signal charge accumulated in the photodetector; and at least one control gate disposed on the first surface of the substrate and superposed on the photodetector, the control gate controlling the potential of the photodetector in the vicinity of the first surface.

This invention relates to photosensitizer dyes for dye-sensitized solar cells. The photosensitizer dyes are porphyrin-based zinc complexes represented by the following general formulae (100) and (200).

wherein A is represented by one of the following formulae (111)˜(118),

wherein Z₁˜Z₁₀ independently represent a hydrogen atom (H), lithium (Li), sodium (Na), or tetra-alkyl ammonium group (as represented by the following general formula (120)),

wherein X₁˜X₄ independently represent C_mH_2m+1 (m=1˜6), and B, C, D, and E independently represent one of the following formulae (131)˜(140),

wherein R_a˜R_z are independently selected from the group consisting of H, C_mH_2m+1 (m=1˜15), OC_pH_2p+1 (p=1˜15), CH₂[OC₂H₄]_nOCH₃ (n=1˜30), and [OC₂H₄]_qOCH₃ (q=1˜30).

A photosensitizer dye is provided. The photosensitizer dye contains a Ru complex represented by the following formula (1):

wherein Y₁ and Y₂ independently represents hydrogen atom (H), lithium (Li), sodium (Na) or tetra-alkyl ammonium groups (as represented by the following general formula (2)). Formula (2):

wherein A, B, C and D independently represents C_mH_2m+1 (m=1˜6).

Wherein X₁ represents one of the following formulas (3)˜(8) and X₂ represents H or a group the same as X₁,

The invention discloses an ultraviolet and infrared double-color detector and a manufacturing method thereof. The ultraviolet and infrared double-color detector comprises a substrate, a buffer layer, a first n-type ohmic contact layer, a multicycle layer, a second n-type ohmic contact layer, an intrinsic layer, a transparent electrode, an upper electrode, a middle electrode and a lower electrode, wherein a material structure for the ultraviolet and infrared double-color detector is grown on the substrate; the buffer layer is grown on the substrate; the first n-type ohmic contact layer is grown on the buffer layer for ohmic contact; the multicycle layer is comprised of a first intrinsic layer and a heavily-doped n-type layer, which are grown alternately; the second n-type ohmic contact layer is grown on the multicycle layer and part of the second n-type ohmic contact layer serves as a n-type ohmic contact electrode; the intrinsic layer has a forbidden band width of Eg3 which is less than or equal to Eg2 and is grown on the second n-type ohmic contact layer; the transparent electrode is formed on the intrinsic layer having the forbidden band width of Eg3; the upper electrode is formed in a small area on the transparent electrode; the middle electrode is formed in the electrode window of the second n-type ohmic contact layer; and the lower electrode is formed in the electrode window of the first second n-type ohmic contact layer.

Belonging to the technical field of optoelectronic devices, the invention discloses an electron transport layer material and a perovskite solar cell. The perovskite solar cell comprises an anode, a hole transport layer, an optical active layer, an electron transport layer and a cathode. The optical active layer is made of a solution processable organic-inorganic hybrid battery material with a perovskite structure, and the electron transport layer has a structure shown as the specification. According to the invention, a conjugated polymer containing a strong polar group is applied in the electron transport layer material of the perovskite solar cell to replace PCBM, TiO2 or others, and the device making cost can be lowered. Also, the side chain polymer of the contained strong polar group plays a significant cathodic interface modification role, and improves the carrier transport ability, thereby acquiring good device performance.

The invention relates to a titanium dioxide/polyaniline photocatalyst with a 3D pattern structure and a preparation method of the titanium dioxide/polyaniline photocatalyst. The preparation method comprises the steps of dispersing carbon balls in absolute ethyl alcohol, adding TBOT, dropping distilled water, centrifugally separating, and drying to obtain brown powder; calcining the brown powder to obtain hollow titanium dioxide nanometer particles, dispersing the hollow titanium dioxide nanometer particles in the absolute ethyl alcohol, dispersing ANI (aniline) in hydrochloric acid, agitating in an ice-water bath to obtain a deep green suspension; and centrifugally separating, and drying to obtain a deep green TiO2/polyaniline (PANI) compound photocatalyst. Polyaniline is used as a sensitizer for modifying titanium dioxide, the operation is simple, reaction conditions are mild and the cost is low. Light is repeatedly refracted and absorbed by using polyaniline nanometer sheets which are mutually meshed, and thus full utilization on solar light is realized, the specific surface area of a composite material can be increased by the polyaniline nanometer sheets, more active sites are provided for light-catalyzed reaction, the light energy conversion efficiency and the photo-catalysis efficiency are improved, the PANI is high in absorption coefficient in a visible light region, and azo-dyes, namely MO and CR, can be directly degraded by using solar light.

A light-sensitive coloring agent as a ruthenium metal complex which is shown as the formula (1).

The invention relates to a double clad all-solid-state photonic crystal fiber and a preparation method thereof. The double clad all-solid-state photonic crystal fiber comprises a fiber core, an inner cladding and an outer cladding. The optical fiber is provided with the outer cladding of which the outer surface is of a round shape. The inner cladding is of a hexagon shape with a sawtooth structure. The preparation method of the double clad all-solid-state photonic crystal fiber comprises the following steps of: using a metal sleeve with an internal hexagon structure as a die; preparing a photonic crystal fiber per-form rod by a stacking method; replacing cladding air holes with glass with low refractive index, so that the making process and the fusion welding of the optical fiber are more simple and convenient; and forming the optical fiber, of which the outer surface is round and the inner cladding is of the hexagon shape with the sawtooth structure by utilizing the surface tension of the glass in the wire drawing process. A pumping light adsorption coefficient of the optical fiber is improved. The coupling efficiency and the pumping light adsorption coefficient are effectively improved. Compared with a double-layer optical fiber with a conventional structure, the output laser power and efficiency are improved by over twice.

The invention belongs to the technical field of solar cell preparation, and particularly relates to a novel perovskite and crystalline silicon back passivation laminated solar cell and a manufacturingmethod thereof. The solar cell includes a bottom cell and a top cell. An upper electrode is fixedly connected to the top cell. An intermediate layer is arranged between the bottom cell and the top cell. The bottom cell is a crystalline silicon back passivated cell. The intermediate layer is a transparent conductive film. The top cell is a perovskite cell. In the present invention, the silicon cell is used as the bottom cell, and the perovskite cell is used as the top cell. The band gap of the silicon cell is 1.12 eV, and the band gap of the perovskite cell is 1.65 to 1.7 eV. In cooperation with the bottom and top cells having such band gaps, the laminated solar cell has a high photoelectric conversion efficiency. In addition, the perovskite has a high absorption coefficient and a steep absorption edge so as to be suitable for the top cell of the crystalline silicon laminated solar cell.

The invention discloses a GaN-based ultraviolet avalanche photo-detector. The GaN-based ultraviolet avalanche photo-detector is formed by arranging a sapphire substrate, a low-temperature nucleation layer, an n-type Al component gradient AlxInyGa1-x-yN layer, an Alx1Iny1Ga1-x1-y1N/Alx2Iny2Ga1-x2-y2N multi-quantum well structure absorption region, an Al component gradient Alx3Iny3Ga1-x3-y3N layer and an Alx4Iny4Ga1-x4-y4N/Alx5Iny5Ga1-x5-y5N multi-quantum well structure multiplication region in sequence from bottom to top. As a multi-quantum well has the advantages of high absorption coefficients, high transverse carrier mobility, strong polarization effects and the like, the absorption region and the multiplication region of the GaN-based ultraviolet avalanche photo-detector are designed to be of a multi-quantum well structure. In this way, the quantum efficiency and responsivity of the GaN-based ultraviolet avalanche photo-detector can be enhanced, the cut-off wavelength of the photo-detector can be freely tuned, and meanwhile the threshold value of avalanche breakdown voltage can be effectively reduced. Accordingly, important significance is achieved for manufacturing the high-performance ultraviolet photo-detector.

The invention relates to a method for detecting cysteine content in real time by a colorimetric method. The method comprises the following steps of: preparing a color developing agent and preparing cysteine standard solution; adding 1.0mL of the color developing agent standard solution with a diluted concentration of 1.0*10<-6>mol/L, 1.0mL of 0.01mol/L NaCl solution, 1.0mL of 0.01mol/L sodium dodecyl sulfate, 1.0mL of mixed phosphate buffer solution with a pH value of 7.5 and 1mL of a sample to be detected into a 10mL volumetric flask in turn; fixing the volume and shaking uniformly; and taking a reagent blank as reference, measuring the absorbency A of the solution at a 646-nm wavelength by using a 1-cm cuvette, recording the absorbency difference delta A, and calculating the cysteine content of the sample to be detected. The method has the advantages of simple operation, high response speed, high selectivity, high sensitivity and the like, and can be quickly and accurately applied to the quantitative measurement of cysteine concentration in synthetic samples and biological samples.

An organic dye, its production and use are disclosed. In the structural formula, R is substituted group with IIor III structure. The process is carried out by inducing thiofuran or thiophthene conjugated system connected with double bond as electronic relay and synthesizing organic dye with carboxyl group and electronic feeder-electronic relay-electronic receptor structure. It's simple and cheap and has excellent light absorption utilization rate.