Study of planar heterojunction perovskite photovoltaic cells using compact titanium oxide by chemical bath deposition

摘要

Spin-coated perovskite solar cells from sol-gels result in high processing costs because of the need for high temperatures. Here, we report a low-temperature spin-coating route to fabricate planar heterojunction perovskite solar cells using chemical bath deposition of compact-TiOx layers. Comparison of the solar cell properties of compact-TiOx and compact-TiO2 layers show that the power conversion efficiency of the planar heterojunction perovskite solar cell fabricated by the low-temperature, compact-TiOx route is comparable to that of conventional TiO2. The chemical bath deposition method requires heating to 150 degrees C only to form amorphous compact-TiOx films compared with the 450 degrees C required for crystalline anatase compact-TiO2 films. (C) 2015 The Japan Society of Applied Physics