[16a-A24-1~12] 16.3 Bulk, thin-film and other silicon-based solar cells

[16a-A24-10] Effectiveness of a-Si:H Front Surface Field Layersin Back Contacted Silicon Heterojunction Solar Cells

〇Hiroshi Noge¹, Hideyuki Takagishi¹, Kimihiko Saito¹, Michio Kondo^1,2 (1.Fukushima Univ., 2.FREA)

Keywords:heterojunction, solar cell, front surface field

Effects of the front surface field (FSF) layers consisting of stacked n-type and i-type a-Si:H films on back contacted heterojunction silicon solar cells have been studied by simulation and experiments. The cell having no n-layer showed big difference in its external quantum efficiency spectra depending on with or without white bias light, in contrast to the 10 nm-thick n-layer cell. The conversion efficiency of the no n-layer cell decreased with the decrease of light intensity below 0.2 sun and therefore FSF is effective for low illumination.