The purpose of this program is to provide general analytic support to Sandia National Laboratory’s effort to develop high efficiency, high concentration solar cells. This support has taken the following forms: 1) Implementation of the two-dimensional silicon code on Purdue’s Cyber 205. 2) The release of both the one- and two-dimensional silicon codes to Sandia National Laboratory. 3) Continued enhancement of the codes and updating of the physical models used by the codes. 4) Use of the two-dimensional code to investigate the performance and design of high concentration solar cells.speed over conventional sequential multi-mode systems. The multi-mode system which uses Golay codes is shown to provide the best overall performance

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