Growth of highly crystalline ultrathin two-dimensional selenene

被引:12
作者
Sarma, Prasad, V [1 ]
Nadarajan, Renjith [1 ]
Kumar, Ritesh [2 ]
Patinharayil, Riya Mol [1 ]
Biju, Navya [1 ]
Narayanan, Sreevidya [1 ]
Gao, Guanhui [3 ]
Tiwary, Chandra Sekhar [4 ]
Thalakulam, Madhu [1 ]
Kini, Rajeev N. [1 ]
Singh, Abhishek K. [2 ]
Ajayan, Pulickel M. [3 ]
Shaijumon, Manikoth M. [1 ]
机构
[1] Indian Inst Sci Educ & Res Thiruvananthapuram IIS, Sch Phys, Maruthamala PO, Thiruvananthapuram 695551, Kerala, India
[2] Indian Inst Sci, Mat Res Ctr, Bangalore 560012, Karnataka, India
[3] Rice Univ, Mat Sci & NanoEngn, Houston, TX 77005 USA
[4] Indian Inst Technol, Met & Mat Engn, Kharagpur, WB, India
关键词
selenene; chemical vapor transport; elemental 2D materials; photoresponse; CHEMICAL-VAPOR-DEPOSITION; FIELD-EFFECT TRANSISTORS; AMORPHOUS SELENIUM; TEMPERATURE;
D O I
10.1088/2053-1583/ac787f
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Elemental two-dimensional (2D) crystals have recently emerged as promising materials for advanced electronics and optoelectronics applications. However, it remains challenging to achieve controllable growth of high-quality, ultra-thin flakes of elemental 2D materials. Here, we demonstrate, for the first time, a seed-assisted chemical vapor transport growth of ultra-thin triangular flakes of highly crystalline trigonal selenium (t-Se) oriented in (0001) direction, with lateral size >30 mu m. The polarization angle-resolved Raman spectra of bilayer selenene show in-plane isotropic properties, owing to the highly symmetric lattice resulting from its unique growth orientation. Density functional theory calculations support the experimental findings in establishing the structure and stability of the as-grown selenene. We studied the optical response of a photodetector fabricated using a bilayer selenene. Our growth strategy can be extended to other elemental 2D materials to realize their full potential in applications ranging from optoelectronics and electronics to energy conversion.
引用
收藏
页数:10
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