Lee, Deok Yeon Kim, Eun-Kyung Shrestha, Nabeen K. Boukhvalov, Danil W. Lee, Joong Kee Han, Sung-Hwan 2024-01-20T06:31:47Z 2024-01-20T06:31:47Z 2022-01-25 2015-08 1944-8244 https://pubs.kist.re.kr/handle/201004/125147 Despite the highly porous nature with significantly large surface area, metal organic frameworks (MOFs) can be hardly used in electronic and optoelectronic devices due to their extremely poor electrical conductivity. Therefore, the study of MOF thin films that require electron transport or conductivity in combination with the everlasting porosity is highly desirable. In the present work, thin films of Co-3(NDC)(3)DMF4 MOFs with improved electronic conductivity are synthesized using layer-by-layer and doctor blade coating techniques followed by iodine doping. The as-prepared and doped films are characterized using FE-SEM, EDX, UV/visible spectroscopy, XPS, current-voltage measurement, photoluminescence spectroscopy, cyclic voltammetry, and incident photon to current efficiency measurements. In addition, the electronic and semiconductor properties of the MOF films are characterized using Hall Effect measurement, which reveals that, in contrast to the insulator behavior of the as-prepared MOFs, the iodine doped MOFs behave as a p-type semiconductor. This is caused by. charge transfer-induced hole doping into the frameworks. The observed charge transfer-induced hole doping phenomenon is also confirmed by calculating the densities of states of the as-prepared and iodine doped MOFs based on density functional theory. Photoluminescence spectroscopy demonstrates an efficient interfacial charge transfer between TiO2 and iodine doped MOFs, which can be applied to harvest solar radiations. English American Chemical Society Charge Transfer-Induced Molecular Hole Doping into Thin Film of Metal-Organic Frameworks Article 10.1021/acsami.5b04771 1 ACS Applied Materials & Interfaces, v.7, no.33, pp.18501 - 18507 ACS Applied Materials & Interfaces 7 33 18501 18507 N scie scopus 000360322000040 2-s2.0-84940659800 Nanoscience & Nanotechnology Materials Science, Multidisciplinary Science & Technology - Other Topics Materials Science Article ELECTRICAL-CONDUCTIVITY PROPERTY CRYSTALS IODINE GROWTH charge transfer complex molecular hole doping thin film MOFs Hall Effect measurement