IV–VI group compounds are excellent candidates for optoelectronics. Here, a solvothermal controlled synthesis of SnS₂ nanosheets with different thickness is reported. The bandgap of nanosheets with thickness of 15 nm was estimated as 2.0 eV which is quite suitable for visible light harvesting. The nanosheets show about 180 times photoinduced current compare with the 35 nm nanosheets and fast response time of 4.9 ms, indicating that the SnS₂ nanosheets are potential materials for high-performance photodetectors.

References

1. 1)
  - 20. Xue, D.-J., Tan, J., Hu, J.-S., et al: ‘Anisotropic photoresponse properties of single micrometer-sized GeSe nanosheet’, Adv. Mater., 2012, 24, (33), pp. 4528–4533 (doi: 10.1002/adma.201201855).
2. 2)
  - 9. Radisavljevic, B., Radenovic, A., Brivio, J., et al: ‘Single-layer MoS2 transistors’, Nat. Nanotechnol., 2011, 6, (3), pp. 147–150 (doi: 10.1038/nnano.2010.279).
3. 3)
  - 23. Li, L., Wu, P., Fang, X., et al: ‘Single-crystalline CdS nanobelts for excellent field-emitters and ultrahigh quantum-efficiency photodetectors’, Adv. Mater., 2010, 22, (29), pp. 3161–3165 (doi: 10.1002/adma.201000144).
4. 4)
  - 24. Konstantatos, G., Sargent, E.H.: ‘Nanostructured materials for photon detection’, Nat. Nano, 2010, 5, (6), pp. 391–400 (doi: 10.1038/nnano.2010.78).
5. 5)
  - 18. Jung, Y., Zhou, Y., Cha, J.J.: ‘Intercalation in two-dimensional transition metal chalcogenides’, Inorg. Chem. Front., 2016, 3, (4), pp. 452–463 (doi: 10.1039/C5QI00242G).
6. 6)
  - 15. Li, L., Chen, Z., Hu, Y., et al: ‘Single-layer single-crystalline SnSe nanosheets’, J. Am. Chem. Soc., 2013, 135, (4), pp. 1213–1216 (doi: 10.1021/ja3108017).
7. 7)
  - 16. Lei, Y., Song, S., Fan, W., et al: ‘Facile synthesis and assemblies of flowerlike SnS2 and In3+-doped SnS2: hierarchical structures and their enhanced photocatalytic property’, J. Phys. Chem. C, 2009, 113, (4), pp. 1280–1285 (doi: 10.1021/jp8079974).
8. 8)
  - 21. Fang, Z., Hao, S., Long, L., et al: ‘The enhanced photoelectrochemical response of SnSe2 nanosheets’, CrystEngComm, 2014, 16, (12), pp. 2404–2410 (doi: 10.1039/c3ce42082e).
9. 9)
  - 8. Rousseas, M., Goldstein, A.P., Mickelson, W., et al: ‘Synthesis of highly crystalline SP2-bonded boron nitride aerogels’, ACS Nano, 2013, 7, (10), pp. 8540–8546 (doi: 10.1021/nn402452p).
10. 10)
  - 19. Bletskan, D.I., Madyar, I.I., Mikulaninets, S.V., et al: ‘Electrical and photoelectric properties of Ges layered crystals grown by different techniques’, Inorg. Mater., 2000, 36, (6), pp. 544–550 (doi: 10.1007/BF02757950).
11. 11)
  - 17. Yu, J., Xu, C.Y., Ma, F.X., et al: ‘Monodisperse SnS2 nanosheets for high-performance photocatalytic hydrogen generation’, ACS Appl. Mater. Interfaces, 2014, 6, (24), pp. 22370–22377 (doi: 10.1021/am506396z).
12. 12)
  - 11. Wang, X., Liu, B., Wang, Q., et al: ‘Three-dimensional hierarchical GeSe2 nanostructures for high performance flexible all-solid-state supercapacitors’, Adv. Mater., 2013, 25, (10), pp. 1479–1486 (doi: 10.1002/adma.201204063).
13. 13)
  - 4. Lhuillier, E., Pedetti, S., Ithurria, S., et al: ‘Two-dimensional colloidal metal chalcogenides semiconductors: synthesis, spectroscopy, and applications’, Acc. Chem. Res., 2015, 48, (1), pp. 22–30 (doi: 10.1021/ar500326c).
14. 14)
  - 1. Novoselov, K.S., Geim, A.K., Morozov, S.V., et al: ‘Electric ﬁeld effect in atomically thin carbon ﬁlms’, Science, 2004, 306, (5696), pp. 666–669 (doi: 10.1126/science.1102896).
15. 15)
  - 7. Yoon, D., Seo, B., Lee, J., et al: ‘Facet-controlled hollow Rh2S3 hexagonal nanoprisms as highly active and structurally robust catalysts toward hydrogen evolution reaction’, Energy Environ. Sci., 2016, 9, (3), pp. 850–856 (doi: 10.1039/C5EE03456F).
16. 16)
  - 14. Zhai, C., Du, N., Zhang, H., et al: ‘Large-scale synthesis of ultrathin hexagonal tin disulfide nanosheets with highly reversible lithium storage’, Chem. Commun., 2011, 47, (4), pp. 1270–1272 (doi: 10.1039/C0CC03023F).
17. 17)
  - 10. Li, H., Lu, G., Wang, Y., et al: ‘Mechanical exfoliation and characterization of single- and few-layer nanosheets of WSe2, TaS2, and TaSe2’, Small, 2013, 9, (11), pp. 1974–1981 (doi: 10.1002/smll.201202919).
18. 18)
  - 1. Duan, X.D., Wang, C., Pan, A.L., et al: ‘Two-dimensional transition metal dichalcogenides as atomically thin semiconductors: opportunities and challenges’, Chem. Soc. Rev., 2015, 44, (24), pp. 8859–8876 (doi: 10.1039/C5CS00507H).
19. 19)
  - 13. Vaughn, D.D., Patel, R.J., Hickner, M.A., et al: ‘Single-crystal colloidal nanosheets of Ges and Gese’, J. Am. Chem. Soc., 2010, 132, (43), pp. 15170–15172 (doi: 10.1021/ja107520b).
20. 20)
  - 6. Xu, M., Liang, T., Shi, M., et al: ‘Graphene-like two-dimensional materials’, Chem. Rev., 2013, 113, (5), pp. 3766–3798 (doi: 10.1021/cr300263a).
21. 21)
  - 12. Deng, Z., Cao, D., He, J., et al: ‘Solution synthesis of ultrathin single-crystalline SnS nanoribbons for photodetectors via phase transition and surface processing’, ACS Nano, 2012, 6, (7), pp. 6197–6207 (doi: 10.1021/nn302504p).
22. 22)
  - 4. Novoselov, K.S., Jiang, D., Schedin, F., et al: ‘Two dimensional atomic crystals’, Proc. Natl, Acad. Sci. U.S.A., 2005, p. 10451 (doi: 10.1073/pnas.0502848102).
23. 23)
  - 22. Hu, P., Wen, Z., Wang, L., et al: ‘Synthesis of few-layer GaSe nanosheets for high performance photodetectors’, ACS Nano, 2012, 6, (7), pp. 5988–5994 (doi: 10.1021/nn300889c).
24. 24)
  - 5. Bouet, C., Tessier, M.D., Ithurria, S., et al: ‘Flat colloidal semiconductor nanoplatelets’, Chem. Mater., 2013, 25, (8), pp. 1262–1271 (doi: 10.1021/cm303786a).

Thickness-dependent photoelectrochemical property of tin disulphide nanosheets

References

Related content