Abstract
An In-doped CdS/Si nanoheterojunction (CdS:In/Si-NPA) is prepared by depositing an In-doped CdS thin film onto a Si nanoporous pillar array (Si-NPA) via a successive ionic layer adsorption and reaction method. Based on the measured J–V characteristic curve, the nanoheterojunction exhibits a good rectifying behavior with a low forward turn-on voltage (2.2 V), a small leakage current density (0.5 mA/cm2 at − 3 V) and a high reverse breakdown voltage (> 8 V). The electroluminescence (EL) measurements reveal that a broadband emerges between 400 and 700 nm, and this band is confirmed as a white light emission based on the value of the chromaticity coordinate. The EL properties, including the CIE chromaticity coordinates, Colour Rendering Index and correlated color temperature, can be tuned by the applied voltage. The generation mechanism of the EL can be well interpreted depending on the energy band structure of CdS:In/Si-NPA. The green band should be attributed to the band-edge emission of CdS and the yellow emission may be related to Cd interstitial. These results highlight the potential of CdS:In/Si-NPA as a light source for future white light emitting devices.
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Y.F. Chan, W. Su, C.X. Zhang, Z.L. Wu, Y. Tang, X.Q. Sun, H.J. Xu, Electroluminescence from ZnO-nanofilm/Si-micropillar heterostructure arrays. Opt. Express 20, 24280 (2012)
D. Wu, Y. Jiang, S. Li, F. Li, J. Li, X. Lan, Y. Zhang, C. Wu, L. Luo, J. Jie, Construction of high-quality CdS: Ga nanoribbon/silicon heterojunctions and their nano-optoelectronic applications. Nanotechnology 22, 405201 (2011)
Y. Ye, B. Yu, Z. Gao, H. Meng, H. Zhang, L. Dai, G. Qin, Two-dimensional CdS nanosheet-based TFT and LED nanodevices. Nanotechnology 23, 194004 (2012)
B. Das, S.P. McGinnis, Porous silicon pn junction light emitting diodes. Semicond. Sci. Technol. 14, 988 (1999)
C.H. Cheng, Y.C. Lien, C.L. Wu, G.R. Lin, Mutlicolor electroluminescent Si quantum dots embedded in SiOx thin film MOSLED with 2.4% external quantum efficiency. Opt. Express 21, 391 (2013)
O. Hayden, A.B. Greytak, D.C. Bell, Core-shell nanowire light-emitting diodes. Adv. Mater. 17, 701 (2005)
H.J. Xu, X.J. Li, Silicon nanoporous pillar array: a silicon hierarchical structure with high light absorption and triple-band photoluminescence. Opt. Express 16, 2933 (2008)
A. Rubel, J. Podder, Structural and electrical transport properties of CdS and Al-doped CdS thin films deposited by spray pyrolysis. J. Sci. Res. 419, 121 (2012)
J.S. Cruz, R.C. Pérez, G.T. Delgado, O.Z. Angel, CdS thin films doped with metal-organic salts using chemical bath deposition. Thin Solid Films 518, 1791 (2010)
L.L. Yan, X.B. Wang, X.J. Cai, X.J. Li, Effect of boron-doping on the luminescent and electrical properties of a CdS/Si heterostructure based on Si nanoporous pillar array. J. Alloy. Compd. 632, 450 (2015)
S. Butt, N.A. Shah, A. Nazir, Z. Ali, A. Maqsood, Influence of film thickness and In-doping on physical properties of CdS thin films. J. Alloy. Compd. 587, 582 (2014)
V.K. Singh, P. Chauhan, S.K. Mishra, R.K. Srivastava, Effect of indium doping and annealing on photoconducting property of wurtzite type CdS. Electron. Mater. Lett. 8, 295 (2012)
J. Lee, Raman scattering and photoluminescence analysis of B-doped CdS thin films. Thin Solid Films 451–452, 170 (2004)
A.L. Patterson, The Scherrer formula for X-Ray particle size determination. Phys. Rev. 56, 978 (1939)
K. Ravichandran, V. Senthamilselvi, Effect of indium doping level on certain physical properties of CdS films deposited using an improved SILAR technique. Appl. Surf. Sci. 270, 439 (2013)
A.M. Abdulkarem, E.M. Elssfah, N.N. Yan, G. Demissie, Y. Yu, Photocatalytic activity enhancement of CdS through In doping by simple hydrothermal method. J. Phys. Chem. Solids 74, 647 (2013)
L.L. Yan, X.B. Wang, W.K. Liu, X.J. Li, Effect of boron doping on the rectification effect and photovoltaic performance of CdS/Si heterostructure based on Si nanoporous pillar array. J. Phys. D 48, 265101 (2015)
L.L. Yan, Y.T. Li, C.X. Hu, X.J. Li, Temperature-dependent photoluminescence and mechanism of CdS thin film grown on Si nanoporous pillar array. Appl. Surf. Sci. 349, 219 (2015)
K. Ravichandran, P. Philominathan, Comparative study on structural and optical properties of CdS films fabricated by three different low-cost techniques. Appl. Surf. Sci. 255, 5736 (2009)
L.L. Yan, H.X. Cai, L. Chen, X.J. Li, Effect of boron-doping on the electroluminescence properties of CdS/Si heterostructure based on Si nanoporous pillar array. Mater. Lett. 181, 113 (2016)
K.Q. Peng, X. Wang, L. Li, Y. Hu, S.-T. Lee, Silicon nanowires for advanced energy conversion and storage. Nano Today 8, 75 (2013)
Z. Fan, D.J. Ruebusch, A.A. Rathore, R. Kapadia, O. Ergen, P.W. Leu, A. Javey, Challenges and prospects of nanopillar-based solar cells. Nano Res. 2, 829 (2009)
H.J. Xu, X.J. Li, Rectification effect and electron transport property of CdS/Si nanoheterostructure based on silicon nanoporous pillar array. Appl. Phys. Lett. 93, 172105 (2008)
C. He, C.B. Han, Y.R. Xu, X.J. Li, Photovoltaic effect of CdS/Si nanoheterojunction array. J. Appl. Phys. 110, 094316 (2011)
A. Narayanaswamy, L.F. Feiner, P.J. Van Der Zaag, Temperature dependence of the photoluminescence of InP/ZnS quantum dots. J. Phys. Chem. C 112, 6775 (2008)
A.E. Abken, D. Halliday, K. Durose, Photoluminescence study of polycrystalline photovoltaic CdS thin film layers grown by close-spaced sublimation and chemical bath deposition. J. Appl. Phys. 105, 064515 (2009)
S. Butt, N.A. Shah, A. Nazir, Z. Ali, A. Maqsood, Influence of film thickness and In-doping on physical properties of CdS thin films. J. Alloy. Compd. 587, 582 (2013)
C.B. Han, C. He, X.J. Li, Near-infrared light emission from a GaN/Si nanoheterostructure array. Adv. Mater. 23, 4811 (2011)
Acknowledgements
This work was supported by the National Natural Science Foundation of China (Grant No. 61705062 and 21601050), the Research Project for Basic and Forefront Technology of Henan Province (Grant No. 162300410219), The Excellent Youth Foundation of Henan Polytechnic University (Grant No. J2017-4), The Youth Backbone Teachers of Henan Polytechnic University (Grant No. QG2016-197), and the Henan Polytechnic University Foundation for Doctor Teachers (Grant No. B2016-46).
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Yan, L.L., Cai, H.X. & Chen, L. Synthesis, structures and electroluminescence properties of CdS:In/Si nanoheterostructure array. Appl. Phys. A 123, 658 (2017). https://doi.org/10.1007/s00339-017-1270-1
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DOI: https://doi.org/10.1007/s00339-017-1270-1