Solar　energy　is　a　renewable　energy　that　the　world　is　endeavouring　to　utilize.　The　solar　cell　is　the　essential　invention　that　makes　energy　transfer　from　light　to　electricity　possible.　Solar　cells　are　normally　made　from　silicon　wafers　due　to　silicon＇s　semi-conductivity.　The　thesis　will　focus　on　the　development　of　silicon　wafers＇　size　and　fabrication　technology.　Through　analysis　of　resent　(in　5　years)　statistics　from　reports　released　by　government　or　incorporations,　the　link　between　the　trend　and　the　reasons　behind　is　interpreted.　ITRPV　has　pointed　out　that　silicon　wafers　are　switching　to　the　mono-crystalline　ones,　the　larger　ones,　and　the　PERC　processed　ones.　The　mono-crystalline　ones　excel　in　efficiency　due　to　uniform　lattice　structure,　but　is　more　costly　because　of　the　Czochralski　process.　The　larger　cells　can　absorb　more　sunlight.　The　PERC　cell　technique　reduces　recombination　and　reflects　unabsorbed　sunlight,　therefore　gradually　eliminates　the　traditional　BSF　technique.　©　Published　under　licence　by　IOP　Publishing　Ltd.