Properties of Silver Nanostructures Incorporated Perovskite Based Thin Films for Solar Cell Applications

doi:10.15541/jim20160041

Abstract

Abstract:

Silver nanostructures (Ag nanoparticles, Ag@SiO₂ core-shell nanoparticles & Ag nanowires) were firstly added into aluminum oxide isopropanol solution to form cellular Al₂O₃mesoporous layers for perovskite solar cell applications, respectively. Then CH₃NH₃PbI₃organic-inorganic hybrid perovskites were fabricated and attached to this matrix. Absorption spectra of Al₂O₃/CH₃NH₃PbI₃ composite and CH₃NH₃PbI₃were found to be basically the same in the visible region, indicating that Al₂O₃ had less impact on the absorption performance of CH₃NH₃PbI₃. However, the incorporation of silver nanostructures could significantly improve the absorption properties of the perovskites, and the best performance could be achieved with the concentration ratios of Ag nanoparticles, Ag@SiO₂ core-shell nanoparticles and Ag nanowires of 0.15, 0.3 and 0.15, respectively. Further increasing the concentration of silver incorporation would probably cause halogenation and reduce the absorption properties of CH₃NH₃PbI₃. In addition, the efficiency of perovskite solar cell could be improved from original 6.28% to 7.09% after addition of Ag@SiO₂ core-shell nanoparticles. In contrast, the incorporation of Ag nanoparticles & nanowires tended to reduce the short circuit current density and conversion efficiency of the fabricated solar cells, because they could prolong the internal carrier transport path and hence increase the recombination probability of the electron-hole pairs.

Key words: silver nanostructures, perovskite, solar cell, absorption property

CLC Number:

TB303

TAN Man-Lin, MA Dong-Cao, FU Dong-Ju, MA Qing, LI Dong-Shuang, WANG Xiao-Wei, ZHANG Wei-Li, CHEN Jian-Jun, ZHANG Hua-Yu. Properties of Silver Nanostructures Incorporated Perovskite Based Thin Films for Solar Cell Applications[J]. Journal of Inorganic Materials, 2016, 31(9): 908-914.

Figures/Tables 11

Fig. 1 SEM & TEM image of silver nanostructures(a) Ag nanoparticles; (b) Ag@SiO2 core-shell structure; (c) Ag nanowires

Fig. 2 Surface (a) and cross-section (b) SEM images of Al2O3/CH3NH3PbI3 film

Fig. 3 XRD patterns of Al2O3/CH3NH3PbI3 composite

Fig. 4 Ultraviolet-visible absorption spectra and optical band gap of Al2O3/CH3NH3PbI3 composite film and CH3NH3PbI3 film

Fig. 5 Ultraviolet-visible absorption spectra of Al2O3/ CH3NH3PbI3 doped with different contents of Ag nanoparticles(a) 0; (b) 0.05; (c) 0.10; (d) 0.15; (e) 0.20; (f) 0.25; (g) 0.30

Fig. 6 XRD patterns of Ag@SiO2 core-shell structure

Fig. 7 Ultraviolet-visible absorption spectra of Al2O3/CH3NH3PbI3 doped with different contents of Ag@SiO2 core-shell structure(a) 0; (b) 0.05; (c) 0.10; (d) 0.15; (e) 0.20; (f) 0.25; (g) 0.30

Fig. 8 Ultraviolet-visible absorption spectra of Al2O3/CH3NH3PbI3 doped with different contents of Ag nanowires(a) 0; (b) 0.05; (c) 0.10; (d) 0.15; (e) 0.20; (f) 0.25; (g) 0.30

Fig. 9 J-V curves of CH3NH3PbI3 Perovskite solar cell with the incorporation of silver nanostructures(a) No doping; (b) Ag@SiO2; (c) Ag nanoparticles; (d) Ag nanowires

Table 1 Parameters of CH3NH3PbI3 Perovskite solar cells

Sample	V_oc/V	J_sc/ (mA·cm^-2)	FF	η/%
No doping	0.91	11.31	0.61	6.28
Ag@SiO₂	0.89	13.64	0.58	7.09
Ag nanoparticles	0.92	10.86	0.61	6.07
Ag nanowires	0.86	10.57	0.62	5.95

Fig. 10 Photoluminescence spectra of silver nanostructures incorporated CH3NH3PbI3 thin film

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