[19p-A301-1~5] Recent progresses of solar cells by oxide semiconductors

3:15 PM - 3:45 PM JST(6:15 AM - 6:45 AM UTC)

[19p-A301-3] Development of crystalline Si solar cells featuring titanium oxide hole transport layers

〇Takuya Matsui¹, Hitoshi Sai¹ (1.AIST)

Keywords:

oxide semiconductor,titanium oxide,silicon,solar cell,ALD

In this study, a tunable carrier-selectivity behavior was found in titanium oxide (TiO_x) nanolayers grown by atomic layer deposition. It is demonstrated that the TiO_x acts as an efficient hole-selective passivating contact in crystalline Si solar cells with >20% efficiency, which is antithetic to the previous understanding that TiO_x acts solely as electron contact and hole blocker. The possible mechanism behind this new functionality is discussed and some applications of TiO_x hole contacts in Si single junction and tandem solar cells are shown.