High efficiency electrospun TiO2 nanofiber based hybrid organic–inorganic perovskite solar cell

• Main Authors: Dharani, Sabba, Mulmudi, Hemant Kumar, Yantara, Natalia, Thu Trang, Pham Thi, Park, Nam Gyu, Graetzel, Michael, Mhaisalkar, Subodh, Mathews, Nripan, Boix, Pablo P.
• Other Authors: School of Materials Science & Engineering
• Format: Article
• Language: English
• Published: 2014
• Subjects: DRNTU::Engineering::Materials
• Online Access: https://hdl.handle.net/10356/104457; http://hdl.handle.net/10220/20226
• Institution: Nanyang Technological University

The good electrical and morphological characteristics of TiO2 nanofibers and the high extinction coefficient of CH3NH3PbI3 perovskite are combined to obtain a solar cell with a power conversion efficiency of 9.8%. The increase of the film thickness dramatically diminishes the performance due to the reduction in porosity of the TiO2 nanofiber framework. The optimum device ([similar]413 nm film thickness) is compared to a planar device, where the latter produces higher Voc but lower Jsc, and consequently lower efficiency at all measured light intensities.