[6p-A204-1~23] 16.3 Bulk, thin-film and other silicon-based solar cells

[6p-A204-20] Imaging of Internal Field of Back-Contact Si Solar Cells with LTEM

〇Toshimitsu Mochizuki¹, Akira Ito², Tomihisa Tachibana¹, Katsuto Tanahashi¹, Masaaki Moriya¹, Yasuhiro Kida¹, Hidetoshi Nakanishi², Iwao Kawayama³, Masayoshi Tonouchi³, Katsuhiko Shirasawa¹, Hidetaka Takato¹ (1.FREA, AIST, 2.SCREEN, 3.ILE, Osaka Univ.)

Keywords:Crystalline Silicon solar cells, Terahertz, Back contact solar cells

We present internal field mapping of crystalline silicon back contact cells using laser terahertz emission microsocpe (LTEM). The THz emission is observed at borders between n+ contacts and p+ emitters, with waveform inversion between left and right side of emitters being observed. The observed THz emission is related to the photocarriers accelerated by internal field parallel to the surface.