A new type of spherical silicon solar cells with semi-concentrated reflector system

A new type of spherical silicon solar cells having semi-concentration reflector system is proposed. A series of computer experiment in this new solar cell has been made on modeling, optimum design, and performance characterization. In this report, the simulation of spherical silicon solar cell including the concentration light with the concentration mirror is shown. The short circuit current density (Jsc) shows the highest value when the concentration light enters the top of the side part. The concentration light, except on a contact part, offer a higher Jsc than that with uniform light. The open circuit voltage (Voc) and fill factor (FF) is improved by concentrating the light near the contact, and it is improved the concentration quantity is increased the concentration mirror, because The excessive amount of electrons generated by concentration light causes the accumulation of electrons at the top of the side part. The potential difference is induced by the concentration light at the top of the side part, i.e., the distribution of potential is not uniform. As the result of simulation, the conversation efficiency entered the uniform light on side part is 17.3%, and the conversation efficiency to entered the 19.2 times concentrated light near the contact on side part is 18.8%.