A method of manufacturing a solar cell includes forming jagged portions non-uniformly on a surface of a substrate, forming a first type semiconductor and a second type semiconductor in the substrate, forming a first electrode to contact the first type semiconductor, and forming a second electrode to contact the second type semiconductor. In detail, if the present apparatus, in an initialization state, receives a sync channel message generated from a base station, the portable telephone apparatus reads a P_REV message which shows the communication protocol used in the mobile phone system. After the dopant structure is formed on the partially reacted precursor layer, the dopant structure and partially reacted precursor layer is fully reacted. The XML engine further instantiates a service using parameters provided in the XML encoded request and launches the service for execution on the network device. The coupling is designed to isolate the rotary bulb tube electrically from the motor and to isolate the bulb tube from motor vibrations. The beam concentrator is configured to receive light from the plurality of light sources and to produce a reduced beam of collimated light having a component representative of each light source.