Lee, Hye Jin Lee, Jae Won Kim, Hee Jun Jung, Dae-Han Lee, Ki-Suk Kim, Sang Hyeon Geum, Dae-myeong Kim, Chang Zoo Choi, Won Jun Baik, Jeong Min 2024-01-20T05:03:10Z 2024-01-20T05:03:10Z 2021-09-04 2016-01-28 1463-9076 https://pubs.kist.re.kr/handle/201004/124493 A series of hierarchical ZnO-based antireflection coatings with different nanostructures (nanowires and nanosheets) is prepared hydrothermally, followed by means of RF sputtering of MgF2 layers for coaxial nanostructures. Structural analysis showed that both ZnO had a highly preferred orientation along the < 0001 > direction with a highly crystalline MgF2 shell coated uniformly. However, a small amount of Al was present in nanosheets, originating from Al diffusion from the Al seed layer, resulting in an increase of the optical bandgap. Compared with the nanosheet-based antireflection coatings, the nanowire-based ones exhibited a significantly lower reflectance (similar to 2%) in ultraviolet and visible light wavelength regions. In particular, they showed perfect light absorption at wavelength less than approximately 400 nm. However, a GaAs single junction solar cell with nanosheet-based antireflection coatings showed the largest enhancement (43.9%) in power conversion efficiency. These results show that the increase of the optical bandgap of the nanosheets by the incorporation of Al atoms allows more photons enter the active region of the solar cell, improving the performance. English ROYAL SOC CHEMISTRY HYDROTHERMAL METHOD VAPOR-DEPOSITION NANOROD ARRAYS COATINGS NANOSHEETS WAVELENGTH NANOWIRES SUBSTRATE GROWTH RANGE Optical design of ZnO-based antireflective layers for enhanced GaAs solar cell performance Article 10.1039/c5cp06274h 1 PHYSICAL CHEMISTRY CHEMICAL PHYSICS, v.18, no.4, pp.2906 - 2912 PHYSICAL CHEMISTRY CHEMICAL PHYSICS 18 4 2906 2912 scie scopus 000369506000068 2-s2.0-84955318035 Chemistry, Physical Physics, Atomic, Molecular & Chemical Chemistry Physics Article HYDROTHERMAL METHOD VAPOR-DEPOSITION NANOROD ARRAYS COATINGS NANOSHEETS WAVELENGTH NANOWIRES SUBSTRATE GROWTH RANGE