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1. (WO2014196247) SOLAR CELL AND SOLAR CELL MODULE

Pub. No.:    WO/2014/196247    International Application No.:    PCT/JP2014/059091
Publication Date: Fri Dec 12 00:59:59 CET 2014 International Filing Date: Sat Mar 29 00:59:59 CET 2014
IPC: H01L 31/0236
Applicants: SHIN-ETSU CHEMICAL CO., LTD.
信越化学工業株式会社
Inventors: HASHIGAMI Hiroshi
橋上 洋
WATABE Takenori
渡部 武紀
OTSUKA Hiroyuki
大塚 寛之
Title: SOLAR CELL AND SOLAR CELL MODULE
Abstract:
Provided is a solar cell having a back surface structure that minimizes carrier recombination loss at the non-acceptance surface, and that affords good electrical contact between the collector electrode and the crystalline silicon substrate. [Solution] The solar cell is provided with a crystalline silicon substrate having a first conduction type, an emitter layer formed on the crystalline silicon substrate and having a second conduction type, and a base layer formed on the crystalline silicon substrate and having the first conduction type, electrodes for extracting to the outside the charges excited by light impinging on the substrate being respectively formed on the emitter layer and the base layer, wherein a protruding and recessed structure having a plurality of protrusions and recesses is furnished to a region that is at least part of the electrode formation region of the non-acceptance surface.