摘要:
In one aspect of the present invention, a photovoltaic device is provided. The photovoltaic device includes a window layer and an absorber layer disposed on the window layer, wherein the absorber layer includes a first region and a second region, the first region disposed adjacent to the window layer. The absorber layer further includes a first additive and a second additive, wherein a concentration of the first additive in the first region is greater than a concentration of the first additive in the second region, and wherein a concentration of the second additive in the second region is greater than a concentration of the second additive in the first region. Method of making a photovoltaic device is also provided.
摘要:
A semiconductor structure is described, including a semiconductor substrate and a semiconductor layer disposed on the semiconductor substrate. The semiconductor layer is both compositionally graded and structurally graded. Specifically, the semiconductor layer is compositionally graded through its thickness from substantially intrinsic at the interface with the substrate to substantially doped at an opposite surface. Further, the semiconductor layer is structurally graded through its thickness from substantially crystalline at the interface with the substrate to substantially amorphous at the opposite surface. Related methods are also described.
摘要:
The present disclosure is directed to a system for controlling dispersal of a granular material from a transport assembly. In an implementation, a system includes a transport assembly including a transport storage receptacle configured to receive granular material, and a payload deposit assembly coupled to transport storage receptacle. The payload assembly configured to disperse the granular material. A location-determining device coupled to the transport assembly. The location-determining device is configured to determine a position of the transport assembly with respect to a storage receptacle. A control mechanism is coupled to the transport storage receptacle, and the control mechanism is configured to control dispersal of the granular material. An electronic device is operatively coupled to the control mechanism. The electronic device is configured to allow dispersal of the granular material from the transport storage receptacle when the transport assembly is correctly positioned with respect to the storage receptacle.
摘要:
A system and method of identifying changes in behavior of a human subject comprises monitoring the movements of the subject within a space using one or more sensors, processing signals from the sensor(s) to determine values for one or more parameters associated with one or more patterns of behavior of the subject, using values for the one or more parameters accumulated over a period of time to establish one or more models of a typical pattern of behavior for the subject, monitoring the ongoing behavior of the subject to obtain current values for one or more of the parameters; and using the current values and the model(s) of a typical pattern of behavior to identify atypical behavior of the subject.An alert may be generated if the current value of one or more of the parameters is outside the acceptable limit(s). Advantageously low resolution thermal imagers are used so as to minimise intrusiveness and invasion of privacy.
摘要:
A semiconductor structure is described, including a semiconductor substrate and a semiconductor layer disposed on the semiconductor substrate. The semiconductor layer is both compositionally graded and structurally graded. Specifically, the semiconductor layer is compositionally graded through its thickness from substantially intrinsic at the interface with the substrate to substantially doped at an opposite surface. Further, the semiconductor layer is structurally graded through its thickness from substantially crystalline at the interface with the substrate to substantially amorphous at the opposite surface. Related methods are also described.
摘要:
Methods of making multi-layered, hydrogen-containing thermite structures including at least one metal layer and at least one metal oxide layer adjacent to the metal layer are disclosed. At least one of the metal layers contains hydrogen, which can be introduced by plasma hydrogenation. The thermite structures can have high hydrogen contents and small dimensions, such as micrometer-sized and nanometer-sized dimensions.
摘要:
A photovoltaic device is provided comprising an absorber layer, wherein the absorber layer comprises a plurality of grains separated by grain boundaries. At least one layer is disposed over the absorber layer. The absorber layer comprises grain boundaries that are substantially perpendicular to the at least one layer disposed over the absorber layer. The plurality of grains has a median grain diameter of less than 1 micrometer. Further, the grains are either p-type or n-type. The grain boundaries comprise an active dopant. The active dopant concentration in the grain boundaries is higher than the effective dopant concentration in the grains. The grains and grain boundaries may be of the same type or opposite type. Further, when the grain boundaries are n-type the bottom of the grain boundaries may be p-type. A method of making the absorber layer is also disclosed.
摘要:
A monolithically integrated cadmium telluride (CdTe) photovoltaic (PV) module includes a first electrically conductive layer and an insulating layer. The first electrically conductive layer is disposed below the insulating layer. The PV module further includes a back contact metal layer and a CdTe absorber layer. The back contact metal layer is disposed between the insulating layer and the CdTe absorber layer. The PV module further includes a window layer and a second electrically conductive layer. The window layer is disposed between the CdTe absorber layer and the second electrically conductive layer. At least one first trench extends through the back contact metal layer, at least one second trench extends through the absorber and window layers, and at least one third trench extends through the second electrically conductive layer. A method for monolithically integrating CdTe PV cells is also provided.