43results about How to "Energy level matching" patented technology

The invention discloses a heptatomic condensed ring benzotriazole receptor micromolecule and a preparation method and application thereof. The compound takes heptatomic condensed ring benzotriazole (B) with an alkyl chain as intercalated nucleus, and cyan group as n-type fullerene receptor material (BIC) of an electrophilic unit. The preparation method comprises the following steps: by taking 4,7-dibromo-5,6-dinitro benzotriazole compound as a raw material, sequentially introducing thienothiophene with an alkyl chain by stille coupling reaction, then performing loop closing, introducing the alkyl chain to N by nucleophilic substitution, introducing aldehyde group via Vilsmeier-Haack, and then introducing a polar conjugation unit by Knoevenage reaction, so as to obtain a BIC compound; the micromolecule forms definite conformation and good solubility, has an electron receptor unit with universality, obtains a high efficiency (PCE of 13%) on a solar cell, and thus is a photovoltaic material full of potential.

The invention discloses a source-drain electrode of a thin film transistor. The source-drain electrode is composed of a molybdenum layer and a copper layer in a sequential overlaying mode, and the copper layer is arranged on the molybdenum layer. The molybdenum layer is arranged on an active layer of the thin film transistor; the growth direction of crystal lattices of the molybdenum layer and the growth direction of crystal lattices of the copper layer are perpendicular to each other; the thickness of the molybdenum layer is 20 nm-40 nm; the thickness of the copper layer is 150 nm-250 nm. The invention further discloses a manufacturing method of the source-drain electrode, the thin film transistor comprising the source-drain electrode and a manufacturing method of the thin film transistor. The defects that in the prior art, copper electrodes are prone to being oxidized, and copper atoms diffuse toward oxide after the copper electrodes deposit on the active layer of the metal oxide are overcome, the source-drain electrode has the advantage of high conductivity, stress balance between two layers of electrodes can be achieved, the disbanding ratio of the electrodes is lowered, and the bonding strength is improved.

The present invention relates to the composite electrode structure of a heterojunction solar cell comprising a transparent conductive layer, an electrode arranged on the transparent conductive layer and an interface buffer layer configured to reduce the interface resistance between the transparent conductive layer and a doped noncrystalline silicon layer; when the electrode is a positive pole, the work function of the interface buffer layer is larger than or equal to 5V; and when the electrode is a negative pole, the work function of the interface buffer layer is smaller than or equal to 4.2eV. In the composite electrode structure of the heterojunction solar cell, the interface buffer layer is inserted between the doped noncrystalline silicon layer and the transparent conductive layer to reduce the interface resistance between the doped noncrystalline silicon layer and the transparent conductive layer so as to improve the filling factors of the battery, match the energy grade of the battery, and finally improve the photoelectric conversion efficiency of the heterojunction solar cell. The present invention further provides a preparation method of the composite electrode structure of the heterojunction solar cell and the heterojunction solar cell and the preparation method thereof.

The invention discloses a perovskite solar cell without an electron transport layer and a hole transport layer and a manufacturing method. The perovskite solar cell comprises an FTO substrate, an FTOelectrode, a PEIE modification layer and a perovskite photoactive layer which are sequentially distributed from bottom to top, wherein an anode is arranged above the perovskite photoactive layer, anda cathode is arranged above the FTO substrate. In the structure, the use of an organic-inorganic hybrid lead halide perovskite material, an organic hole transport layer material and an expensive metalelectrode is avoided, and meanwhile, an electron transport layer is abandoned; the PEIE material is deposited on the FTO electrode; according to the method, a monomolecular layer can be introduced tothe surface, and an interface dipole is formed between the FTO electrode and the perovskite photoactive layer, so that the work function of the surface of the FTO electrode is reduced, and the energylevels of the FTO electrode and the CsPbIBr2 photoactive layer are more matched. Recombination between photon-generated carriers is greatly inhibited. And meanwhile, the open-circuit voltage and thefilling coefficient of the device are obviously improved.

The invention discloses a semitransparent perovskite solar cell, a semitransparent perovskite solar module and a preparation method. The semitransparent perovskite solar cell comprises a bottom electrode, a bottom charge transmission layer, a perovskite optical active layer, a top charge transmission layer and a top electrode which are arranged on a substrate, wherein the top charge transmission layer comprises a first charge transmission layer and a second charge transmission layer; if the top charge transport layer is an electron transport layer, the material of the first charge transport layer at least comprises any one of TiO2, SnO2, PCBM, ZnO and CdS, and the material of the second charge transport layer at least comprises any one of TiO2, SnO2, PCBM, ZnO and CdS, and is different from the material of the first charge transport layer. The semitransparent perovskite solar cell is advantaged in that performance of the semitransparent perovskite solar cell is improved.

The invention belongs to solar cell field and discloses a V2O5-doped hole transport film with an adjustable work function and a preparation method and use thereof. The preparation method is characterized by dissolving metallic oxide V2O5 nanometer particles in a solvent; dissolving the dissolved metallic oxide V2O5 nanometer particles and water-soluble PEDOT:PSS in different proportions; acquiring a film by means of a spin coating, immersion or Czochralski method; and performing treatment by means of an annealing manner to obtain a target product film. The film obtained in the invention is adjustable in thickness variation range, uniform, decreased in corrosion to an electrode, and good in stability. The mutual dissolution of the water-soluble V2O5 nanometer particles and the PEDOT:PSS in different proportions achieves the adjustable work function of the film and energy level characteristic matching of different materials, and is beneficial to carrier injection and transmission. The preparation method is simple and low in cost and almost has no requirement for equipment. The film is good in stability and repeatability.

The invention discloses a luminescent material based on fluorene arylamine compounds, a preparation method of the luminescent material and an organic electroluminescent device, and belongs to the technical field of chemical and luminescent materials. The structural general formula of the luminescent material is shown in the description, wherein X is selected from chemical bonds, O, S, Si(R5R6), C(R7R8) or NR9; any two of a, b, c and d are 1, and the rest are 0; R1 to R4 are independently selected from hydrogen, substituted or unsubstituted C1-C30 alkyl, substituted or unsubstituted C6-C30 aryl, substituted or unsubstituted 3-membered to 30-membered heteroaryl, substituted or unsubstituted C1-C30 alkoxy, substituted or unsubstituted C6-C30 aryloxy, and C3-C30 aliphatic ring or C6-C30 aromatic ring connected with an adjacent substituent to form a monocyclic or polycyclic aromatic ring. The organic electroluminescent device containing the luminescent material is relatively low in drivingvoltage, relatively long in service life and relatively high in efficiency.

The invention discloses a dicarbazolyl derivative, a preparation method and application of the dicarbazolyl derivative, and an electroluminescent device. The general structural formula of the dicarbazolyl derivative is represented as drawing shown in the specification, wherein R is an electron withdrawing group. The adopted compound takes a dicarbazolyl group as a central structure and is bonded with various electron withdrawing groups on 3-position of any carbazolyl, so as to effectively regulate a conjugated system of a host material and regulate triplet energy levels of the host material, so that HOMO and LUMO energy levels of the host material can be better matched with energy level of a blue-light object material. In addition, electron hole transmission performance of the compound is regulated through the electron withdrawing group, so that hole and electron transmission capacity of the host material is to be balanced, and the luminous efficiency of the device is improved; the dicarbazolyl derivative is relatively low in efficiency rolling-off under a high-brightness condition, so that the dicarbazolyl derivative can be widely applied to the field of organic electroluminescence.

The invention relates to a fibrous perovskite solar cell and a preparation method and application thereof. The solar cell takes a titanium wire serving as an electrode as the center and sequentially comprises the titanium wire serving as the electrode, a titanium dioxide compact layer, a titanium dioxide porous layer, a perovskite crystal layer, a hole transporting layer and thin gold serving as an opposite electrode from inner to outside in the radial direction of the solar cell. The prepared fibrous perovskite solar cell can greatly improve the energy conversion efficiency (which can reach up to 9%), can easily achieve big-size preparation and provides an effective guarantee for being applied to the fields of wearable equipment, smart home and the like.

The invention provides a solar cell device comprising an anode, a hole buffer layer, an active layer, an electron buffer layer and a cathode which are laminated in turn. The material of the active layer is mixture of poly 3-hexyl thiophene and methyl butyrate of fullerene. The material of the hole buffer layer comprises oxides of rhenium, electron buffer materials and hole buffer materials. The oxides of rhenium are selected from at least one of rhenium dioxide, rhenium heptoxide, rhenium trioxide and oxide rhenium. The electron buffer materials are selected from at least one of cesium azide, lithium fluoride, lithium carbonate and cesium carbonate. The hole buffer materials are mixture of poly 3,4-ethylene dioxythiophene and polyphenyl sulfonate. The solar cell device is relatively high in energy conversion efficiency. Besides, the invention also provides a preparation method of the solar cell device.

The invention discloses a perovskite thin film solar cell with barium titanate as an electron transport material and a preparation method thereof. The solar cell is characterized by comprising a transparent conductive substrate 1, a barium titanate thin film 2, a perovskite thin film 3, a thiophene bridged carbazole-anthracene copolymer 4 and a metal electrode 5 in turn from bottom to top. The advantages of the solar cell are as follows: on one hand, barium titanate can absorb ultraviolet light and generate a large number of electron-hole pairs, and can protect perovskite from being decomposedby ultraviolet light while increasing the number of electron-hole pairs; and on the other hand, the thiophene bridged carbazole-anthracene copolymer matches the energy level of perovskite, and has high thermal stability and high hole mobility. Therefore, the photoelectric conversion efficiency of the perovskite solar cell is greatly improved, and the stability of the cell is enhanced.