Hyun, Gyeongho Park, Soohyung Jeong, Junkyeong Lee, Kyu Seung Son, Dong Ick Lee, Hyunbok Yi, Yeonjin 2024-01-20T01:30:16Z 2024-01-20T01:30:16Z 2021-09-05 2017-06-08 1932-7447 https://pubs.kist.re.kr/handle/201004/122636 The electronic structure of ZnO core-C-60 shell (ZnO@C-60) quantum dots (QDs) was investigated with the help of model interface analysis between ZnO QDs and C-60 using in situ ultraviolet and X-ray photoelectron spectroscopy measurements. To form the ZnO QDs/C-60 interface in situ, a vacuum-integrated electrospray deposition technique was employed to simulate the electronic interactions between ZnO QDs and C-60 upon the formation of a ZnO@C-60 core-shell structure. Photoelectron spectra of ZnO QDs/C-60 interface formation were compared with those of ZnO@C-60 QD and pristine ZnO QD films. The results revealed that ZnO QDs and C-60 interacted via electron transfer leading to the change in ionization energy.of the surface C-60. This induced a negligible energy barrier between the lowest unoccupied molecular orbital level of C-60 and the conduction band minimum of ZnO, which led to efficient electron transport through the ZnO@C-60 QDs. English American Chemical Society ENERGY-LEVEL ALIGNMENT ORGANIC SOLAR-CELLS ZINC-OXIDE SEMICONDUCTOR NANOCRYSTALS PHOTOEMISSION-SPECTROSCOPY OPTICAL-PROPERTIES CDSE NANOCRYSTALS COLLECTION LAYER LIGAND ZNO Unveiling the Electronic Structure of ZnO-C-60 Core-Shell Quantum Dots: The Origin of Efficient Electron Transport Article 10.1021/acs.jpcc.7b02725 1 The Journal of Physical Chemistry C, v.121, no.22, pp.12230 - 12235 The Journal of Physical Chemistry C 121 22 12230 12235 scie scopus 000403191600029 2-s2.0-85021122370 Chemistry, Physical Nanoscience & Nanotechnology Materials Science, Multidisciplinary Chemistry Science & Technology - Other Topics Materials Science Article ENERGY-LEVEL ALIGNMENT ORGANIC SOLAR-CELLS ZINC-OXIDE SEMICONDUCTOR NANOCRYSTALS PHOTOEMISSION-SPECTROSCOPY OPTICAL-PROPERTIES CDSE NANOCRYSTALS COLLECTION LAYER LIGAND ZNO ZnO-C60 Core-Shell Quantum Dots Efficient Electron Transport Electronic Structure