Abstract
Metal oxide nanostructure detectors must adsorb both oxygen molecules and incident light to achieve ultrahigh photogain. However, the oxygen adsorption and desorption process can prolong the photoresponse time of the photogain. Therefore, it is a challenge to fabricate such metal oxide nanostructures that have the ability to adsorb both oxygen molecules and incident light simultaneously to generate large amounts of carriers under light illumination, using a simple preparation method. In this work, self-connected core–shell SnO2 microspheres were prepared and used as a photodetector. The interconnected SnO2 device exhibited improved photoresponse properties with photocurrent of 15.4 μA at room temperature, representing a nearly 43-fold enhancement compared with traditional photodetectors. The underlying mechanism for this process was revealed by Hall mobility versus temperature and photocurrent versus power intensity characteristics. We found that conducting channels among the tightly interconnected microspheres are mainly responsible for the improved photocurrent response, providing effective paths for electron transport as well as available sites for charge carrier accumulation.
Similar content being viewed by others
References
J. Zhou, Y.D. Gu, Y.F. Hu, W.J. Mai, P.H. Yeh, G. Bao, A.K. Sood, D.L. Polla, and Z.L. Wang, Appl. Phys. Lett. 94, 191103 (2009).
T.Y. Wei, P.H. Yeh, S.Y. Lu, and Z.L. Wang, J. Am. Chem. Soc. 131, 17690 (2009).
Y.Z. Jin, J.P. Wang, B.Q. Sun, J.C. Blakesley, and N.C. Greenham, Nano Lett. 8, 1649 (2008).
J.D. Prades, R. Jimenez-Diaz, F. Hernandez-Ramirez, L. Fernandez-Romero, T. Andreu, A. Cirera, A. Romano-Rodriguez, A. Cornet, J.R. Morante, S. Barth, and S. Mathur, J. Phys. Chem. C 112, 14639 (2008).
Y.G. Han, C.C. Fan, G. Wu, H.Z. Chen, and M. Wang, J. Phys. Chem. C 115, 13438 (2011).
F. He, C. Zhang, D. Zhou, L. Cheng, T. Li, and G.X. Li, Dalton Trans. 43, 7599 (2014).
M. Chen, L.F. Hu, J.X. Xu, M.Y. Liao, L.M. Wu, and X.S. Fang, Small 7, 2449 (2011).
P.A. Hu, Z.Z. Wen, L.F. Wang, P.H. Tan, and K. Xiao, ACS Nano 6, 5988 (2012).
Q.H. Li, T. Gao, and T.H. Wang, Appl. Phys. Lett. 86, 123117 (2005).
J. Retamal, C.Y. Chen, D.H. Lien, M.S. Huang, C.A. Lin, C.P. Liu, and J.H. He, ACS Photonics 1, 354 (2014).
Z.M. Jarzebski and J.P. Marton, J. Electrochem. Soc. 123, 199C (1976).
C.H. Lin, R.S. Chen, T.T. Chen, H.Y. Chen, Y.F. Chen, K.H. Chen, and L.C. Chen, Appl. Phys. Lett. 93, 112115 (2008).
J. Liang, X.Y. Yu, H. Zhou, H.B. Wu, S.J. Ding, and X.W. Lou, Angew. Chem. Int. Ed. 53, 12803 (2014).
T.Y. Zhai, X.S. Fang, M.Y. Liao, X.J. Xu, H.B. Zeng, B. Yoshio, and D. Golberg, Sensors 9, 6504 (2009).
J.P. Zou, Q. Zhang, K. Huang, and N. Marzari, J. Phys. Chem. C 114, 10725 (2010).
S.M. Peng, Y.K. Su, L.W. Ji, S.J. Young, C.Z. Wu, C.N. Tsai, W.C. Chao, and W.B. Cheng, IEEE Sensors J. 11, 1173 (2011).
W. Tian, C. Zhang, T.Y. Zhai, S.L. Li, X. Wang, M.Y. Liao, K. Tsukagoshi, D. Golberg, and Y. Bando, Chem. Commun. 49, 3739 (2013).
L.B. Luo, F.X. Liang, and J.S. Jie, Nanotechnology 22, 485701 (2011).
S.S. Lin, Y.S. Tsai, and K.R. Bai, Appl. Surf. Sci. 380, 203 (2016).
A. Wong, X.X. Wang, and J.F. Liu, J. Appl. Phys. 117, 103109 (2015).
J. Heo, A. Hock, and R. Gordon, Chem. Mater. 22, 4964 (2010).
C. Sun, N. Mathews, M.R. Zheng, C.H. Sow, L.H. Wong, and S.G. Mhaisalkar, J. Phys. Chem. C 114, 1331 (2010).
S.P. Chang, S.J. Chang, Y.Z. Chiou, C.Y. Lu, T.K. Lin, Y.C. Lin, C.F. Kuo, and H.M. Chang, Sens. Actuators A 140, 60 (2007).
M. Rajabi, R.S. Dariani, and A.I. Zad, Actuators A 180, 11 (2012).
H. Chen, L.F. Hu, X.S. Fang, and L.M. Wu, Adv. Funct. Mater. 22, 1229 (2012).
N. Nasiri, R. Bo, F. Wang, L. Fu, and A. Tricoli, Adv. Mater. 27, 4336 (2015).
Acknowledgements
We gratefully acknowledge financial support of this work by the National Key Research and Development Program of China (2017YFB0403101), National Natural Science Foundation of China (Nos. 61474096 and 61604127), Natural Science Foundation of Jiangsu Province (No. BK20150453), Natural Science Foundation of the Higher Education Institutions of Jiangsu Province, China (No. 14KJB510036), and Doctoral Program of Jiangsu Province (No. 1501144B).
Conflict of interest
The authors declare that they have no conflicts of interest.
Author information
Authors and Affiliations
Corresponding author
Electronic supplementary material
Below is the link to the electronic supplementary material.
Rights and permissions
About this article
Cite this article
Xia, W., Li, W., Zeng, X. et al. Interconnected SnO2 Microsphere Films with Improved Ultraviolet Photodetector Properties. J. Electron. Mater. 46, 6669–6676 (2017). https://doi.org/10.1007/s11664-017-5711-6
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s11664-017-5711-6