Tunable Band Gap Photoluminescence from Atomically Thin Transition-Metal Dichalcogenide Alloys
Source abstract
Abstract
Band gap engineering of atomically thin two-dimensional (2D) materials is the key to their applications in nanoelectronics, optoelectronics, and photonics. Here, for the first time, we demonstrate that in the 2D system, by alloying two materials with different band gaps (MoS2 and WS2), tunable band gap can be obtained in the 2D alloys (Mo(1-x)W(x)S(2) monolayers, x = 0-1). Atomic-resolution scanning transmission electron microscopy has revealed random arrangement of Mo and W atoms in the Mo(1-x)W(x)S(2) monolayer alloys. Photoluminescence characterization has shown tunable band gap emission continuously tuned from 1.82 eV (reached at x = 0.20) to 1.99 eV (reached at x = 1). Further, density functional theory calculations have been carried out to understand the composition-dependent electronic structures of Mo(1-x)W(x)S(2) monolayer alloys.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: 2D Materials and Applications · MXene and MAX Phase Materials · Graphene research and applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Key Laboratory of Standardization and Measurement for Nanotechnology of Chinese Academy of Sciences, National Center for Nanoscience and Technology, Beijing 100190, People’s Republic of China
Key Laboratory of Organic Optoelectronics and Molecular Engineering, Department of Chemistry, Tsinghua University, Beijing 100084, People’s Republic of China
Department of Electronic Engineering, National Taiwan University of Science and Technology, Taipei 106, Taiwan, Republic of China
Nanotube Research Center, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba 305-8565, Japan
References (50)
Show source-provided references
1. Novoselov K. S. · Science · 2004 · 306 · 66610.1126/science.1102896 ↗
2. Wang H. · Nano Lett. · 2012 · 12 · 467410.1021/nl302015v ↗
3. Xia F. N. · Nano Lett. · 2010 · 10 · 71510.1021/nl9039636 ↗
4. Radisavljevic B. · Nat. Nanotechnol. · 2011 · 6 · 14710.1038/nnano.2010.279 ↗
5. Wang Q. H. · Nat. Nanotechnol. · 2012 · 7 · 69910.1038/nnano.2012.193 ↗
6. Xia F. N. · Nat. Nanotechnol. · 2009 · 4 · 83910.1038/nnano.2009.292 ↗
7. Reina A. · Nano Lett. · 2009 · 9 · 3010.1021/nl801827v ↗
8. Lin Y. M. · Science · 2011 · 332 · 129410.1126/science.1204428 ↗
9. Tarrio C. · Phys. Rev. B · 1989 · 40 · 785210.1103/PhysRevB.40.7852 ↗
10. Mak K. F. · Phys. Rev. Lett. · 2010 · 105 · 13680510.1103/PhysRevLett.105.136805 ↗
11. Splendiani A. · Nano Lett. · 2010 · 10 · 127110.1021/nl903868w ↗
12. 10.1021/nl302635710.1021/nl3026357 ↗
13. Zhang Y. B. · Nature · 2009 · 459 · 82010.1038/nature08105 ↗
14. Balog R. · Nat. Mater. · 2010 · 9 · 31510.1038/nmat2710 ↗
15. Scalise E. · Nano Res. · 2012 · 5 · 4310.1007/s12274-011-0183-0 ↗
16. 10.1002/smll.20120298210.1002/smll.201202982 ↗
17. Adachi S. · 200910.1002/9780470744383 ↗
18. Ebert P. · Nano Lett. · 2012 · 12 · 584510.1021/nl303197a ↗
19. Peng Q. · Physica E · 2012 · 44 · 166210.1016/j.physe.2012.04.011 ↗
20. Lam K. T. · Appl. Phys. Lett. · 2011 · 98 · 02210110.1063/1.3535604 ↗
21. Komsa H.-P. · J. Phys. Chem. Lett. · 2012 · 3 · 365210.1021/jz301673x ↗
22. Tomashik, V.InRefractory Metal Systems;Effenberg, G.; Ilyenko, S., Eds.Springer:Berlin, 2009; Vol.11E1, pp444–473.
23. Ci L. · Nat. Mater. · 2010 · 9 · 43010.1038/nmat2711 ↗
24. Dumcenco D. O. · J. Alloys Compd. · 2010 · 506 · 94010.1016/j.jallcom.2010.07.120 ↗
25. Yousefi G. H. · J. Mater. Sci. Lett. · 1993 · 12 · 173110.1007/BF00517593 ↗
26. Vanvecht J. A. · Phys. Rev. B · 1970 · 1 · 335110.1103/PhysRevB.1.3351 ↗
27. Podberezskaya N. V. · J. Struct. Chem. · 2001 · 42 · 65410.1023/A:1013106329156 ↗
28. Ho C. H. · J. Phys.: Condens. Matter · 1998 · 10 · 9317
29. Krivanek O. L. · Nature · 2010 · 464 · 57110.1038/nature08879 ↗
30. Dumcenco D. O. · Nat. Commun. · 2012 · 4 · 135110.1038/ncomms2351 ↗
31. Cowley J. M. · Phys. Rev. · 1960 · 120 · 164810.1103/PhysRev.120.1648 ↗
32. Thomazeau C. · Oil Gas Sci. Technol. · 2005 · 60 · 78110.2516/ogst:2005055 ↗
33. Thomazeau C. · J. Solid State Chem. · 2001 · 160 · 14710.1006/jssc.2001.9208 ↗
34. Ding Y. · Physica B · 2011 · 406 · 225410.1016/j.physb.2011.03.044 ↗
35. Dumcenco D. O. · Chin. J. Phys. · 2011 · 49 · 270
36. Lee C. · ACS Nano · 2010 · 4 · 269510.1021/nn1003937 ↗
37. Chang I. F. · Phys. Rev. · 1968 · 172 · 92410.1103/PhysRev.172.924 ↗
38. Yin W. J. · Phys. Rev. B · 2008 · 78 · 16120310.1103/PhysRevB.78.161203 ↗
39. Komsa H. P. · Phys. Rev. B · 2012 · 86 · 24120110.1103/PhysRevB.86.241201 ↗
40. Ramasubramaniam A. · Phys. Rev. B · 2012 · 86 · 11540910.1103/PhysRevB.86.115409 ↗
41. Delerue C. · Phys. Rev. Lett. · 2003 · 90 · 07680310.1103/PhysRevLett.90.076803 ↗
42. Wirtz L. · Phys. Rev. Lett. · 2006 · 96 · 12610410.1103/PhysRevLett.96.126104 ↗
43. Popescu V. · Phys. Rev. Lett. · 2010 · 104 · 23640310.1103/PhysRevLett.104.236403 ↗
44. Popescu V. · Phys. Rev. B · 2012 · 85 · 08520110.1103/PhysRevB.85.085201 ↗
45. Wilson J. A. · Adv. Phys. · 1969 · 18 · 19310.1080/00018736900101307 ↗
46. Kresse G. · Phys. Rev. B · 1999 · 59 · 175810.1103/PhysRevB.59.1758 ↗
47. Kohn W. · Phys. Rev. · 1965 · 140 · A113310.1103/PhysRev.140.A1133 ↗
48. Kresse G. · Phys. Rev. B · 1996 · 54 · 1116910.1103/PhysRevB.54.11169 ↗
49. Sgiarovello C. · Phys. Rev. B · 2001 · 64 · 19530510.1103/PhysRevB.64.195305 ↗
50. Fall C. J. · J. Phys.: Condens. Matter · 1999 · 11 · 2689