title: Selective formation of GaN-based nanorod heterostructures on soda-lime glass substrates by a local heating method.
abstract: We report on the fabrication of high-quality GaN on soda-lime glass substrates, heretofore precluded by both the intolerance of soda-lime glass to the high temperatures required for III-nitride growth and the lack of an epitaxial relationship with amorphous glass. The difficulties were circumvented by heteroepitaxial coating of GaN on ZnO nanorods via a local microheating method. Metal-organic chemical vapor deposition of ZnO nanorods and GaN layers using the microheater arrays produced high-quality GaN/ZnO coaxial nanorod heterostructures at only the desired regions on the soda-lime glass substrates. High-resolution transmission electron microscopy examination of the coaxial nanorod heterostructures indicated the formation of an abrupt, semicoherent interface. Photoluminescence and cathodoluminescence spectroscopy was also applied to confirm the high optical quality of the coaxial nanorod heterostructures. Mg-doped GaN/ZnO coaxial nanorod heterostructure arrays, whose GaN shell layers were grown with various different magnesocene flow rates, were further investigated by using photoluminescence spectroscopy for the p-type doping characteristics. The suggested method for fabrication of III-nitrides on glass substrates signifies potentials for low-cost and large-size optoelectronic device applications.
authors: Department of Materials Science and Engineering, POSTECH, Pohang, Gyeongbuk, Korea.
authors: Young Joon
authors: YJ
authors: Hong
authors: Yong-Jin
authors: YJ
authors: Kim
authors: Jong-Myeong
authors: JM
authors: Jeon
authors: Miyoung
authors: M
authors: Kim
authors: Jun Hee
authors: JH
authors: Choi
authors: Chan Wook
authors: CW
authors: Baik
authors: Sun Il
authors: SI
authors: Kim
authors: Sung Soo
authors: SS
authors: Park
authors: Jong Min
authors: JM
authors: Kim
authors: Gyu-Chul
authors: GC
authors: Yi