Figure 6From: Conical islands of TiO2 nanotube arrays in the photoelectrode of dye-sensitized solar cells J - V curves of DSCs based on planar and conical island structures of TiO 2 nanotube arrays. (a) Planar structure, 1.0 μm (average length of TiO2 nanotube arrays); (b) planar structure, 1.5 μm; (c) planar structure, 2.0 μm; (d) conical island structure, 1.0 μm; (e) conical island structure, 1.5 μm; and (f) conical island structure, 2.0 μm.Back to article page