Journal
FRONTIERS OF PHYSICS
Volume 18, Issue 5, Pages -Publisher
HIGHER EDUCATION PRESS
DOI: 10.1007/s11467-023-1277-3
Keywords
2D materials; gallium selenide; second harmonic generation; chemical vapor deposition; photodetector
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In this study, high-quality epitaxial growth of few-layer gallium selenide (GaSe) nanoflakes with different thicknesses was achieved using chemical vapor deposition (CVD) method. The grown GaSe nanoflakes exhibited excellent second harmonic generation (SHG) due to their non-centrosymmetric structure. Additionally, the constructed GaSe nanoflake-based photodetector demonstrated stable and fast response under visible light excitation, with a rise time of 6 ms and decay time of 10 ms. These achievements clearly indicate the potential of GaSe nanoflakes in nonlinear optics and (opto)-electronics applications.
As an emerging group III-VI semiconductor two-dimensional (2D) material, gallium selenide (GaSe) has attracted much attention due to its excellent optical and electrical properties. In this work, high-quality epitaxial growth of few-layer GaSe nanoflakes with different thickness is achieved via chemical vapor deposition (CVD) method. Due to the non-centrosymmetric structure, the grown GaSe nanoflakes exhibits excellent second harmonic generation (SHG). In addition, the constructed GaSe nanoflake-based photodetector exhibits stable and fast response under visible light excitation, with a rise time of 6 ms and decay time of 10 ms. These achievements clearly demonstrate the possibility of using GaSe nanoflake in the applications of nonlinear optics and (opto)-electronics.
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