Noble metal-free mesoscopic perovskite solar cell based on low-cost molybdenum (Mo) cathode has been developed for the first time. By optimizing the thickness of Mo electrode and combination with high quality perovskite layer, the Mo cathode-based perovskite solar cell exhibited a best power conversion efficiency as high as 15.06% with invariance of current density-voltage curves at different scan rates and very small hysteresis according to scan direction. In addition to photovoltaic performances, importance of mechanical durability of a cathode material for perovskite solar cell was highlighted and results from nano-indentation and scratch test indicated that Mo electrode has superior resistance and restoration capability against external scratch or deformation compared to Au electrode. The Mo cathode-based perovskite solar cells have great potential for realizing low cost and high performance as well as mechanical durability.
Bibliographical noteFunding Information:
The authors acknowledge funding support from the Global Frontier R&D Program on Center for Multiscale Energy System ( 2012M3A6A7054856 ) and 2015 University-Institute cooperation program funded by the National Research Foundation under the Ministry of Science, ICT & Future Planning, Korea ; This work was also supported by the KIST Institutional Programs ( 2V03780 and 2E25392 ). This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIP) (no. 2010-0018289 ).
Prof. Dae-Eun Kim received his B.S. from Tufts University in 1984 and M.S. and Ph.D. from M.I.T. in 1986 and 1991, respectively. He was an Assistant Professor at the Ohio State University before joining the faculty of Yonsei University, where he is currently a Professor in the Department of Mechanical Engineering. He is also the Director of the Center for Nano-Wear, which is part of the Creative Research Initiative program sponsored by the National Research Foundation of Korea. His research interests include nano/bio-tribology, functional coatings, and micro-fabrication.
All Science Journal Classification (ASJC) codes
- Renewable Energy, Sustainability and the Environment
- Materials Science(all)
- Electrical and Electronic Engineering