A one-pot route for the simultaneous deposition of compact layer and scaffold in perovskite solar cell by anodic electrodeposition
Tzu-Chien Wei a, Shun-Lai Xie a, Tzu-Sen Su a
a Department of Chemical Engineer, National Tsing Hua University, No. 101, Section 2, Kuang-Fu Road, Hsinchu, Taiwan 30013, R.O.C., Taiwan, Province of China
Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics
Proceedings of International Conference Asia-Pacific Hybrid and Organic Photovoltaics (AP-HOPV17)
Yokohama-shi, Japan, 2017 February 2nd - 4th
Organizers: Tsutomu Miyasaka and Iván Mora-Seró
Poster, Tzu-Sen Su, 040
Publication date: 7th November 2016

The perovskite solar cell (PSC) with a compact layer (CL) and a mesoporous scaffold is considered most promising in terms of efficiency, reproducibility and hysteresis control. Typically, CL and scaffold are made by two separated steps, which increases the complexity of the fabrication procedure. In this study, we developed a unique method to deposit a TiO2 CL and TiO2 scaffold on FTO glass for PSCs by applying a two-stepelectrodeposition in one single bath. The bottom-up growth characteristic of electrodeposition offers excellent controllability of the thickness and morphology of TiO2 films by simply altering the depositing profile. As a result, we found that a satisfactory TiO2 CL and scaffold can be obtained using a profile of -0.6V initially and -0.5V sequentially. From cyclic voltammetry, it was showed that depositing time at 250 seconds in -0.6V and then 120 seconds in -0.5V resulted in an optimal CL and scaffold in sequence. At present, the highest power conversion efficiency of PSC using this method achieved 14.6%.

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