DataVXACS Applied Electronic MaterialsPaper
journal article·2022-06-28

Snapshots of Ambient Aging in 2D-Layered GaSe

Tz-Ju Hong, Yu-Xun Chen, Nguyen Nhat Quyen, Yu-Han Chen, Cheng-Hsing Chen, Bang-Hao Huang, Jiann-Yeu Chen, Mon-Shu Ho, Jenh-Yih Juang, Chia-Hao Chen, Chih-Wei Luo

ACS Applied Electronic Materials· Volume 4· Issue 6
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Source abstract

Abstract

Ambient aging has substantially hindered the development of electronic and optoelectronic devices made of two-dimensional (2D) semiconducting layered materials because the origin of oxidation, degradation, and aging effects remains largely unexplored. This study unveils the mechanism and process of ambient aging in 2D-layered GaSe crystals by exploring the evolution of the ambient aging process in a snapshot fashion. Through the detailed examinations on surface morphology, lattice structure, and elemental compositions, three major stages of the aging process in GaSe crystals are identified: the formation of a defective GaSe top layer, a crystalline Ga2Se3 layer, and an amorphous Ga2O3 layer evolving on top of the Ga2Se3 layer. In particular, it is suggestive that the formation of the crystalline Ga2Se3 layer plays a crucial role in the entire oxidation process. The present results may be also applicable to other 2D semiconducting layered materials.
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Research context

Electronic materials

OpenAlex topics: 2D Materials and Applications · Perovskite Materials and Applications · MXene and MAX Phase Materials

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Department of Electrophysics, National Yang Ming Chiao Tung University, Hsinchu 30010, Taiwan

National Synchrotron Radiation Research Center (NSRRC), Hsinchu 30076, Taiwan

MSSCORPS CO., LTD, Hsinchu 30072, Taiwan

Center for Advanced Science and Technology, National Chung Hsing University, Taichung City 40227, Taiwan

Department of Physics, National Chung Hsing University, Taichung City 40227, Taiwan

Institute of Physics and Center for Emergent Functional Matter Science, National Yang Ming Chiao Tung University, Hsinchu 30010, Taiwan

Taiwan Consortium of Emergent Crystalline Materials (TCECM), Ministry of Science and Technology, Taipei 10601, Taiwan

Funding

Ministry of Education · Ministry of Science and Technology, Taiwan

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