研究目的
Investigating the synthesis of high-quality 2D Cu9S5 nanoflakes and their application in high-performance p-n heterojunction photodetectors.
研究成果
The study successfully synthesized high-crystalline p-type semiconductor Cu9S5 nanoflakes using a salt-assisted CVD method. The Cu9S5/MoS2 heterostructure demonstrated strong interface coupling, leading to high photoresponsivity and detectivity, making Cu9S5 a promising material for optoelectronic applications.
研究不足
The synthesis of Cu9S5 is challenging due to its non-van der Waals structure nature and the inclination of isotropic growth. The thickness control of Cu9S5 nanoflakes requires precise adjustment of copper source amount.
1：Experimental Design and Method Selection:
The synthesis of Cu9S5 nanoflakes was achieved using a salt-assisted chemical vapor deposition (CVD) method, which promotes anisotropic growth.
2：Sample Selection and Data Sources:
High-quality single-crystal Cu9S5 nanoflakes were synthesized on mica substrates.
3：List of Experimental Equipment and Materials:
CuO and NaCl were used as copper sources, sulfur powder as the sulfur source, and mica as the growth substrate.
4：Experimental Procedures and Operational Workflow:
The mixture of CuO and NaCl was placed in the central zone of a tube furnace, with sulfur at the entrance. The temperature was raised to 800 °C for 5 min before cooling.
5：Data Analysis Methods:
The synthesized nanoflakes were characterized using optical microscopy, SEM, AFM, TEM, Raman spectroscopy, PL spectroscopy, and XPS.
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