Ryu, UnJin Jee, Seohyeon Park, Joon-Suh Han, Il Ki Lee, Ju Ho Park, Minwoo Choi, Kyung Min 2024-01-19T23:00:50Z 2024-01-19T23:00:50Z 2021-09-03 2018-05 1936-0851 https://pubs.kist.re.kr/handle/201004/121431 Flexible perovskite solar cells (PSCs) have attracted considerable attention due to their excellent performance, low-cost, and great potential as an energy supplier for soft electronic devices. In particular, the design of charge transporting layers (CTLs) is crucial to the development of highly efficient and flexible PSCs. Herein, nano crystalline Ti-based metal-organic framework (nTi-MOF) particles are synthesized to have ca. 6 nm in diameter. These are then well-dispersed in alcohol solvents in order to generate electron transporting layers (ETLs) in PSCs under ambient temperatures using a spin-coating process. The electronic structure of nTi-MOF ETL is found to be suitable for charge injection and transfer from the perovskite to the electrodes. The combination of a [6,6]-phenyl-C-61-butyric acid (PCBM) into the nTi-MOF ETL provides for efficient electron transfer and also suppresses direct contact between the perovskite and the electrode. This results in impressive power conversion efficiencies (PCEs) of 18.94% and 17.43% for rigid and flexible devices, respectively. Moreover, outstanding mechanical stability is retained after 700 bending cycles at a bending radius (r) of 10 mm. English AMER CHEMICAL SOC HIGH-PERFORMANCE LOW-TEMPERATURE STABILITY LAYER TIO2 FILM Nanocrystalline Titanium Metal-Organic Frameworks for Highly Efficient and Flexible Perovskite Solar Cells Article 10.1021/acsnano.8b02079 1 ACS NANO, v.12, no.5, pp.4968 - 4975 ACS NANO 12 5 4968 4975 scie scopus 000433404500097 2-s2.0-85046698188 Chemistry, Multidisciplinary Chemistry, Physical Nanoscience & Nanotechnology Materials Science, Multidisciplinary Chemistry Science & Technology - Other Topics Materials Science Article HIGH-PERFORMANCE LOW-TEMPERATURE STABILITY LAYER TIO2 FILM metal-organic frameworks nanocrystals titanium oxo-cluster flexible perovskite solar cells electron transporting layers