| 摘要 |
A concentrator photovoltaic (PV) cell 110 comprises: a front plane through which light passes into the PV cell to generate a photocurrent (e.g. > 1 Amp per cm); a plurality of conductive gridlines/fingers 140 disposed across the front plane to communicate the photocurrent with the front plane; one or more separate radially elongate conductive bus bars 125 (e.g. with eight gridline connections per bus bar), each disposed across and extending into a central region of the front plane, each bus bar comprising a bond pad region 132 (e.g. with dimensions between 25Ám and 200Ám) at a periphery 135 of the front plane to couple the photocurrent to an external load (112). A front surface 120 of the photovoltaic cell has an area 200mm 2 and preferably 10mm 2 and an optical concentrator 100 is arranged to receive incident sunlight and deliver the sunlight, concentrated by a factor of at least fifty, to the front plane. Each bus bar may be dart shaped, tapering away from the periphery. Four bus bars may be arranged across the front plane to form a "+" or "x" shape. |
