A compound photovoltaic cell includes a substrate, a first cell made of a first semiconductor material and formed on the substrate, a tunnel layer, and a second cell made of a second semiconductor material lattice mismatched with a material of the substrate, connected to the first cell via the tunnel layer, and disposed on an incident side with respect to the first cell, wherein band gaps of the first and the second cells become smaller from an incident side to a back side, and wherein the tunnel layer includes a p-type layer disposed on the incident side and a n-type layer disposed on the back side, the p-type layer being a p.sup.+-type (Al)GaInAs layer, the n-type layer being an n.sup.+-type InP layer, an n.sup.+-type GaInP layer having a tensile strain with respect to InP or n.sup.+-type Ga(In)PSb layer having a tensile strain with respect to InP.

A first insulating layer is layered on first surfaces of solar cells. Herein, the first insulating layer is formed of polyolefin or ethylene-vinyl acetate copolymer (EVA). A second insulating layer is layered on the first insulating layer. Herein, the second insulating layer is formed of polyester resin. A first inter-cell wire rod and second inter-cell wire rod provided to the first surfaces of the solar cells are partially brought into contact with the second insulating layer.

Disclosed are a photovoltaic with improved visibility, which can improve optical-to-electric conversion efficiency and can be applied to a window of a building or a view window of a moving means such as a vehicle, and a method of manufacturing the same. The photovoltaic includes a transparent substrate, a transparent electrode formed on one surface of the transparent substrate, a plurality of photovoltaic cells configured to each include a first electrode formed on the transparent electrode, an optical-to-electric conversion part formed on the first electrode, and a second electrode formed on the optical-to-electric conversion part, and a separation part provided between adjacent photovoltaic cells. The separation part exposes the transparent electrode to incident sunlight.

An anisotropic conducting adhesive is improved in conductivity without increasing the density of admixed conductive particles by inducing metallic fusion between the surfaces of the conducting particles and the surfaces being bonded. The metallic fusion may be promoted by physical/chemical interaction characteristic of certain materials at a compressed interface; by compression sufficient to deform the conductive particles in a manner that increases the mechanical contact area; by heating (with or without melting of a material), which may also serve to cure the adhesive matrix; or by acoustic vibration, e.g., ultrasonic vibration. The resulting metallic-fusion joint is stronger, as well as more conductive, than a joint in which the particles and surfaces are held in unfused mechanical contact.

A high power solar cell module including a cover plate, a back plate, a first encapsulation, a second encapsulation, a plurality of N type hetero-junction solar cells, and a plurality of reflective connection ribbons is provided. The back plate is opposite to the cover plate. The first encapsulation is located between the cover plate and the back plate. The second encapsulation is located between the first encapsulation and the back plate. The N type hetero-junction solar cells and the reflective connection ribbons are located between the first encapsulation and the second encapsulation, and any two adjacent N type hetero junction solar cells are connected in series along a first direction by at least one of the reflective connection ribbons, wherein each of the reflective connection ribbons has a plurality of triangle columnar structures. Each of the triangle columnar structures points to the cover plate and extends along the first direction.

According to various embodiments, a particle containing structured solder material is provided as solder material for joining a solar cell connector with a solar cell. That is why for example, the light incident on the solder material is reflected diffusely and thus partially delivered back to the solar cell, whereby the light captured by the solar cell is increased. Less of the solar cell surface is shadowed based on the solder material or the solar cell connector.

A solar cell module is disclosed. The solar cell module includes a plurality of solar cells each including a semiconductor substrate and electrodes formed on a surface of the semiconductor substrate, and a plurality of wirings connected to the electrodes provided in the each solar cell through a conductive adhesive in order to electrically connect a plurality of adjacent solar cells among the plurality of solar cells. Each of the plurality of wirings includes a core bundle formed as a bundle of a plurality of cores and a coating layer coating an outer surface of the core bundle. A plurality of wiring unevenness are formed along a surface of each of the plurality of wirings in an outer surface shape of the core bundle.

A solar cell module includes: two solar cells, each including: a first main face and a second main face; a first electrode on the first main face, comprising a bus-bar electrode having at least one of an opening portion, notch portion, and gap portion; and a second electrode on the first or second main face having a polarity opposite to that of the first electrode; a wiring member that electrically connects the first electrode of one solar cell to the second electrode of another solar cell; and an electrically conductive connection layer that contacts the wiring member and the first main face.

The present invention concerns a plating method for manufacturing of electrical contacts on a solar module wherein the wiring between silicon solar cells in a solar module is deposited by electroplating onto a conductive seed. The wiring between individual silicon solar cells comprises wiring reinforcement pillars which improve the reliability of said wiring.

Photovoltaic (PV) cells that can be interconnected with improved interconnect joints to form PV cell strings and PV modules. The improved interconnect joints comprise at least two types of adhesive bonding regions to maximize both electrical conductivity and mechanical strength of interconnect joints coupling terminals of PV cells. The disclosed approaches to PV cell interconnection provide greater manufacturing rates and higher quality PV cell strings and PV modules.