Open AccessManipulated Optical Absorption and Accompanied Photocurrent Using Magnetic Field in Charger Transfer Engineered C/ZnO Nanowires
Author(s) -
Lin JunXiao,
Chen GuanXun,
Liao YenFa,
Hsu TzuChun,
Chen WeiJhong,
Hung KuoYi,
Huang TingYi,
Lee JiannShing,
Remes Zdenek,
Hsu HuaShu
Publication year - 2020
Publication title -
global challenges
Language(s) - English
Resource type - Journals
ISSN - 2056-6646
DOI - 10.1002/gch2.202000025
Subject(s) - photocurrent , materials science , nanowire , magnetic field , absorption (acoustics) , optoelectronics , photonics , semiconductor , physics , quantum mechanics , composite material
Abstract The rarely explored, spin‐polarized band engineering, enables direct dynamic control of the magneto‐optical absorption (MOA) and associated magneto‐photocurrent (MPC) by a magnetic field, greatly enhancing the range of applicability of photosensitive semiconductor materials. It is demonstrated that large negative and positive MOA and MPC effects can be tuned alternately in amorphous carbon ( a‐C )/ZnO nanowires by controlling the sp 2 /sp 3 ratio of a‐C . A sizeable enhancement of the MPC ratio (≈15%) appears at a relatively low magnetic field (≈0.2 T). Simulated two peaks spin‐polarized density of states is applied to explain that the alternate sign switching of the MOA is mainly related to the charge transfer between ZnO and C. The results indicate that the enhanced magnetic field performance of ( a‐C )/ZnO nanowires may have applications in renewable energy‐related fields and tunable magneto‐photonics.