$B!!B@M[EECS$NH/L@$HH/E8$NNr;K5Z$S$3$l$+$i$NH/E8M=A[$K$D$$$F35MW$r=R$Y$?(J¡ $B!!%7%c!<%W$O(J1959$BG/$K3+H/$r3+;O$7(J1960$BG/Be$+$i3$>eJ]0BD#$NEtBfMQEE8;$KGB??t$Ne$N1R@1$G3hLvCf$G$"$k(J¡$BB@M[EECS$NK\3JE*$J3+H/6%Ah$O(J1973$BG/$N%*%$%k%7%g%C%/$KC<$rH/$7$?@h?J3F9q$N $B!!B@M[8wH/EE$OFs;@2=C:AG$rGS=P$7$J$$%/%j!<%s$JH/EEJ}<0$G$"$k;v$+$i:#8e$NH/E8$,4|BT$5$l$k$,!$EvLL$N2]Bj$O%3%9%H%@%&%s$N$?$a$N5;=Q3+H/$K$"$k(J¡$B>-Mh$O!$M-5!H>F3BN$K$h$kB@M[EECS$N3+H/$H $B!!(JThis paper outlines the history of solar cells from invention to progress in the future. $B!!(JSHARP started the development of solar cells in 1959 and delivered them to a power supply system for a lighthouse from 1960's. At present, 738 lighthouses are powered by our photovoltaic systems and 80 satellites use our solar cells. Japanese government started 'the roof top program' in 1994 by setting photovoltaic modules on the roof of house. This program strongly encouraged Japanese manufacturers and enlarged manufacturing capacities, because of its promising pollution-free power source in next century. In future, the development of solar cells made from organic semiconductor will become necessary.