S-1 Supporting Information Photon Up-Conversion via Epitaxial Surface-Supported Metal- Organic Framework Thin Films with Enhanced Photocurrent Shargeel Ahmad, a Jinxuan Liu, *, a Chenghuan Gong, a Jianzhang Zhao, a Licheng Sun *, a, b a State Key Laboratory of Fine Chemicals, Institute of Artificial Photosynthesis, Dalian University of Technology, 116024 Dalian, China b Department of Chemistry, School of Chemical Science and Engineering, KTH Royal Institute of Technology, 10044 Stockholm, Sweden * Corresponding author: jinxuan.liu@dlut.edu.cn; sunlc@dlut.edu.cn