Abstract:
Solar cells in accordance with the present invention have reduced ohmic losses. These cells include photo-receptive regions that are doped less densely than adjacent selective emitter regions. The photo-receptive regions contain multiple four-sided pyramids that decrease the amount of light lost to the solar cell by reflection. The smaller doping density in the photo-receptive regions results in less blue light that is lost by electron-hole recombination. The higher doping density in the selective emitter region allows for better contacts with the metallic grid coupled to the multiple emitter regions. Preferably, the selective emitter and photo-receptive regions are both implanted using a narrow ion beam containing the dopants.
Abstract:
According to a solar cell manufacturing method of an embodiment, in a process of forming a surface protection layer by transferring a resin material applied to a cylindrical surface of a cylindrical blanket, to a light receiving surface of a solar cell substrate, the blanket is rotated on the light receiving surface of the solar cell substrate in a first direction in which the multiple thin wire electrodes extend.
Abstract:
A bipolar solar cell (100) includes a backside junction formed by a silicon substrate (101) and a first doped layer (108) of a first dopant type on the backside of the solar cell. A second doped layer (106) of a second dopant type makes an electrical connection to the substrate (101) from the front side of the solar cell (100). A first metal contact (110) of a first electrical polarity electrically connects to the first doped layer (108) on the backside of the solar cell, and a second metal contact (102) of a second electrical polarity electrically connects to the second doped layer (106) on the front side of the solar cell (100). An external electrical circuit may be electrically connected to the first and second metal contacts to be powered by the solar cell (100).
Abstract:
Providing a technology for forming a metal oxide layer covering an underlayer without any cracks. Using a manufacturing method which includes a process (A) for forming a particle layer of a plurality of one or more types of particles consisting mainly of a metal oxide and/or a metal hydroxide, and a process (B) for forming, using a reaction solution which includes one or more types of metal ions, a metal oxide layer consisting mainly of an oxide of the one or more types of metal ions on the particle layer so as to cover the particle layer without any cracks by a liquid phase method under a pH condition in which at least a portion of the plurality of particles remains without being dissolved by the reaction solution, a layered film having a layered structure of the particle layer and the metal oxide layer is manufactured.
Abstract:
A copper indium diselenide (CIS)-based photovoltaic device includes a CIS- based solar absorber layer including copper, indium, and selenium. The CIS-based photovoltaic device further includes a substrate formed from a silicone composition. The substrate, because it is formed from the silicone composition, is both flexible and sufficiently able to withstand annealing temperatures in excess of 500 °C to obtain maximum efficiency of the device.
Abstract:
A method of producing silicon nanowires includes providing a substrate in the form of a doped material; formulating an etching solution; and applying an appropriate current density for an appropriate length of time. Related structures and devices composed at least in part from silicon nanowires are also described.
Abstract:
Provided are methods for making a device or device component by providing a multilayer structure having a plurality of functional layers and a plurality of release layers and releasing the functional layers from the multilayer structure by separating one or more of the release layers to generate a plurality of transferable structures. The transferable structures are printed onto a device substrate or device component supported by a device substrate. The methods and systems provide means for making high-quality and low-cost photovoltaic devices, transferable semiconductor structures, (opto-)electronic devices and device components.
Abstract:
A low temperature method and system configuration for depositing a doped silicon layer on a silicon substrate of a selected grade. The silicon substrate for functioning as a light absorber and the doped silicon layer for functioning as an emitter. The method comprises the acts of: positioning the silicon substrate in a chamber suitable for chemical vapour deposition of the doped silicon layer on the silicon substrate, an external surface of the silicon substrate suitable for promoting crystalline film growth; using a plurality of process parameters for adjusting growth of the doped silicon layer, the plurality of process parameters including a first process parameter of a process temperature for inhibiting diffusion of dopant atoms into the external surface of the silicon substrate, and a second process parameter of a hydrogen dilution level for providing excess hydrogen atoms to affect a layer crystallinity of the atomic structure of the doped silicon layer; exposing the external surface of the silicon substrate in the chamber to a vapour at appropriate ambient chemical vapour deposition conditions, the vapour including silicon atoms, dopant atoms and the excess hydrogen atoms, the atoms for use in growing the doped silicon layer; and originating growth of the doped silicon layer on the external surface to form an interface between the doped silicon layer and the silicon substrate, such that the doped silicon layer includes first atomic structural regions having a higher quality of the layer crystallinity next to the interface with adjacent second atomic structural regions having a lower quality of the layer crystallinity with increasing concentrations of crystal defects for increasing thickness of the doped silicon layer from the interface. The resultant silicon substrate and doped layer (or thin film) can be used in solar cell manufacturing.
Abstract:
A thin-film photovoltaic device and a process of making such a device, the device comprising a first layer of a chalkopyrite semiconductor of a first doping type; a second layer of intrinsic zinc oxide deposited by chemical vapour deposition; a third layer of zinc oxide semiconductor of a second doping type opposite to the first doping type and deposited by a method other than chemical vapour deposition; and wherein the second layer is arranged between the first and third layers.
Abstract:
The invention relates to a photovoltaic cell comprising a photovoltaically active semi-conductor material. The photovoltaically active semi-conductor material is a material of formula (I), formula (II) or a combination therefrom, comprising (I) (Zn1-xMgxTe)1-y(MnTem)y and (II) (ZnTe)1-y(MeaMb)y, whereby MnTem and MeaMb is a doping agent, wherein M represents at least one element selected from the groups Si, Ge, Sn, Pb, Sb and Bi and Me represents at least one element selected from the groups Mg and Zn, wherein x = 0 - 0,5 y = 0,0001 - 0,05 n = 1 - 2 m = 0,5 - 4 a = 1 - 5 and b = 1 - 3.