0191-9067/85 $3.00 + .00 Copyright ® 1985 SUNSAT Energy Council SOLAR CELL AND ITS APPLICATION SHINTARO HAYASHI and AKIRA ONOE Electron Device Engineering Laboratory Toshiba Corporation 8, Shinsugita-cho, Isogo-ku Yokohama, 235 Japan Abstract — The outline of solar cell technology and the photovoltaic industry are presented for terrestrial use. Then, some new technologies on space-use solar cells are shown. It seems that there is a close relationship between the growth of terrestrial and space-use solar cell technology, and in order to realize a large scale SPS, terrestrial solar cells should have been put into practice. INTRODUCTION At the first ISAS Space Energy Symposium held on the 28-29th of January, 1982, we reported the results of the comparison between terrestrial and SPS-use solar cell (1). It was emphasized that in order to realize 5-15 GW SPS, cost decreases of solar cells by several orders of magnitude and development of large scale mass production technology, are most important. Also, we showed several attempts to realize the improvement of producibility. Now we shall describe the activities hitherto accomplished regarding terrestrial use solar cells in Japan and in the world. Then we shall show several areas of progress in space-use solar cell technology. DEVELOPMENT PROGRAMS ON PHOTOVOLTAIC TECHNOLOGIES Sunshine Program in Japan Photovoltaic energy has been expected as a renewable and clean energy which is thought to occupy the main part of 21st century energy supply. In Japan, under the leadership of MITI and NEDO, several development programs have been carried out by many kinds of research organizations. These programs are all headed under the title Sunshine Program. Especially, NEDO executes an experiment on overthrough pilot production line of low cost solar cells and their demonstrative application systems. The pilot production line has the capacity of 500 kW per year and consists of one chlorsilane purifying plant, one SOG polysilicon granulating plant, two wafer manufacturing plants (ribbon and cast wafer), two solar cell processing plants (dry and wet processing) and one panel assembly plant. Meanwhile, five kinds of demonstrative application systems have been under construction, namely, private home application system, co-operative residence system, college power supply system,
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