Fabrication of highly ordered and vertically oriented TiO2 nanotube arrays for ordered heterojunction polymer/inorganic hybrid solar cell

Highly ordered and vertically oriented TiO2 nanotube arrays with a length of 250 nm and a diameter of 70 nm were prepared by atomic layer deposition (ALD) coupled with anodic aluminum oxide (AAO) template. An ordered heterojunction (OHJ) polymer/inorganic hybrid solar cell was fabricated by successful infiltration of P3HT into the nanotube arrays. Structural features of the nanotube arrays enabling the interdigitated structure of the OHJ were discussed and the performance of the solar cell was characterized to be the power conversion efficiency of 0.50%.

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► TiO2 ALD process using AAO template.
► Synthesis of highly ordered and vertically oriented TiO2 nanotubes.
► Polymer/inorganic hybrid solar cell is fabricated with the TiO2 nanotubes.
► P3HT is fully infiltrated into the nanotube arrays.
► Interdigitated structure of the ordered heterojunction solar cell is developed.