journal article·2017-09-26

Electronic Properties of a 1D Intrinsic/p-Doped Heterojunction in a 2D Transition Metal Dichalcogenide Semiconductor

Zhibo Song, Thorsten Schultz, Zijing Ding, Bo Lei, Cheng Han, Patrick Amsalem, Tingting Lin, Dongzhi Chi, Swee Liang Wong, Yu Jie Zheng, Ming-Yang Li, Lain-Jong Li, Wei Chen, Norbert Koch, Yu Li Huang, Andrew Thye Shen Wee

ACS Nano· Volume 11· Issue 9
Publisher page

Abstract

Two-dimensional (2D) semiconductors offer a convenient platform to study 2D physics, for example, to understand doping in an atomically thin semiconductor. Here, we demonstrate the fabrication and unravel the electronic properties of a lateral doped/intrinsic heterojunction in a single-layer (SL) tungsten diselenide (WSe 2 ), a prototype semiconducting transition metal dichalcogenide (TMD), partially covered with a molecular acceptor layer, on a graphite substrate. With combined experiments and theoretical modeling, we reveal the fundamental acceptor-induced p-doping mechanism for SL-WSe 2 . At the 1D border between the doped and undoped SL-WSe 2 regions, we observe band bending and explain it by Thomas–Fermi screening. Using atomically resolved scanning tunneling microscopy and spectroscopy, the screening length is determined to be in the few nanometer range, and we assess the carrier density of intrinsic SL-WSe 2 . These findings are of fundamental and technological importance for understanding and employing surface doping, for example, in designing lateral organic TMD heterostructures for future devices.
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Research context

OpenAlex topics: 2D Materials and Applications · Graphene research and applications · Advanced Thermoelectric Materials and Devices

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

Affiliations

Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore 117542

Institute of Materials Research & Engineering (IMRE), A*STAR (Agency for Science, Technology and Research), 2 Fusionopolis Way, Innovis, Singapore 138634

Institut für Physik & IRIS Adlershof, Humboldt-Universität zu Berlin, Brook-Taylor Straße 6, 12489 Berlin, Germany

SZU-NUS Collaborative Innovation Center for Optoelectronic Science & Technology, Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, Shenzhen University, Shenzhen 518060, China

Department of Chemistry, National University of Singapore, 2 Science Drive 3, Singapore 117542

Research Center for Applied Sciences, Academia Sinica, Taipei 10617, Taiwan

Physical Sciences and Engineering, King Abdullah University of Science and Technology, Thuwal 23955-6900, Saudi Arabia

Centre for Advanced 2D Materials, National University of Singapore, Block S14, Level 6, 6 Science Drive 2, Singapore 117546

Funding

Ministry of Education - Singapore · Deutsche Forschungsgemeinschaft · Science and Engineering Research Council · Graphene Research Centre, National University Singapore

References (48)

Show source-provided references
1. 10.1021/acsnano.5b0555610.1021/acsnano.5b05556 ↗
2. 10.1002/adfm.20150231610.1002/adfm.201502316 ↗
3. 10.1021/acs.nanolett.5b0366210.1021/acs.nanolett.5b03662 ↗
4. 10.1038/ncomms567310.1038/ncomms5673 ↗
5. 10.1002/adfm.20160463810.1002/adfm.201604638 ↗
6. 10.1038/ncomms729810.1038/ncomms7298 ↗
7. 10.1021/nl501659n10.1021/nl501659n ↗
8. 10.3390/cryst609011310.3390/cryst6090113 ↗
9. 10.1021/acs.nanolett.5b0493610.1021/acs.nanolett.5b04936 ↗
10. 10.1039/C5RA22768B10.1039/C5RA22768B ↗
11. 10.1021/nn501342910.1021/nn5013429 ↗
12. 10.1038/nmat420510.1038/nmat4205 ↗
13. 10.1021/nn501580c10.1021/nn501580c ↗
14. 10.1021/nn504196n10.1021/nn504196n ↗
15. 10.1021/nl401117210.1021/nl4011172 ↗
16. 10.1021/acs.nanolett.6b0115210.1021/acs.nanolett.6b01152 ↗
17. 10.1016/j.flatc.2017.01.00110.1016/j.flatc.2017.01.001 ↗
18. 10.1021/acsami.5b0477710.1021/acsami.5b04777 ↗
19. 10.1103/PhysRevLett.115.23610110.1103/PhysRevLett.115.236101 ↗
20. 10.1103/PhysRevB.81.23540110.1103/PhysRevB.81.235401 ↗
21. 10.1103/PhysRevB.77.19340110.1103/PhysRevB.77.193401 ↗
22. 10.1021/jp205337610.1021/jp2053376 ↗
23. 10.1002/adma.20130346710.1002/adma.201303467 ↗
24. 10.1021/acsnano.5b0731410.1021/acsnano.5b07314 ↗
25. 10.1021/acs.nanolett.5b0414110.1021/acs.nanolett.5b04141 ↗
26. 10.1021/ja109746310.1021/ja1097463 ↗
27. 10.1021/acs.nanolett.6b0100710.1021/acs.nanolett.6b01007 ↗
28. 10.1038/ncomms866610.1038/ncomms8666 ↗
29. 10.1021/acs.nanolett.6b0427510.1021/acs.nanolett.6b04275 ↗
30. 10.1126/science.aab409710.1126/science.aab4097 ↗
31. 10.1021/acs.nanolett.5b0242310.1021/acs.nanolett.5b02423 ↗
32. 10.1038/nmat406410.1038/nmat4064 ↗
33. 10.1002/adfm.20160388410.1002/adfm.201603884 ↗
34. 10.1063/1.481597810.1063/1.4815978 ↗
35. 10.1021/nn405719x10.1021/nn405719x ↗
36. 10.1021/acs.nanolett.6b0088810.1021/acs.nanolett.6b00888 ↗
37. Song, Z.; Wang, Q.; Lin, T.; Li, M. Y.; Li, L. J.; Zheng, Y. J.; Wang, Z.; Chi, D.; Ding, Z.; Huang, Y. L.; Wee, A. T.Liquid-Solid Surface Phase Transformation of Fluorinated Fullerene on Monolayer Tungsten Diselenide. Manuscript in preparation.
38. 10.1021/acs.nanolett.6b0538110.1021/acs.nanolett.6b05381 ↗
39. 10.1021/acs.nanolett.6b0477510.1021/acs.nanolett.6b04775 ↗
40. 10.1021/acs.nanolett.6b0005910.1021/acs.nanolett.6b00059 ↗
41. 10.1103/PhysRevB.16.271710.1103/PhysRevB.16.2717 ↗
42. Scharf B. · arxiv.org/abs/1606.07101 · 2016
43. 10.1103/PhysRevB.41.789210.1103/PhysRevB.41.7892 ↗
44. 10.1103/PhysRevB.50.1795310.1103/PhysRevB.50.17953 ↗
45. 10.1103/PhysRevLett.77.386510.1103/PhysRevLett.77.3865 ↗
46. 10.1103/PhysRevB.47.55810.1103/PhysRevB.47.558 ↗
47. 10.1103/PhysRevLett.92.24640110.1103/PhysRevLett.92.246401 ↗
48. 10.1088/0953-8984/22/2/02220110.1088/0953-8984/22/2/022201 ↗