We are a research group in an international university in Japan (https://groups.oist.jp/emssu). We are looking for an experienced postdoctoral scholar in the field of (1) Scanning Tunneling Microscopy, (2) Perovskite Solar Cell and LED, (3) Li-Ion Battery. Candidates with extensive research experience in UHV systems, STM/STS/UPS/XPS/IPES techniques or perovskite solar cells, solid-state DSSCs, hybrid solar cells, organic electronics, synthetic chemistry and energy storage will be given preference. Experience in photonic crystal simulation, XRD, GIXD, flexible electronics, or roll-to-roll coating systems will be helpful for this position. The successful candidate will perform research related to the design, synthesis, development of novel materials for high efficiency, low cost solar cells. The candidate is expected to make use of first-rate shared institute facilities including UV-Photolithography systems, e-Beam Lithography, FIB, various deposition and etching systems, HR-TEMs, SEMs, AFMs, XRFs, XPSs, XRD, Raman & FTIR Spectrometers, spectroradiometer, Physical properties measurement system and ellipsometers. The group has strong collaborations with international institutes (e.g. Princeton University) as well as industrial partners (e.g. Merck).