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Preparation of rGO/ZnO photoanodes and their DSSCs performance

Jiake Li
Jiake Li
, 
Lanxiang Wu
Lanxiang Wu
, 
Wentao Li
Wentao Li
, 
Ying Chen
Ying Chen
, 
Xin Liu
Xin Liu
, 
Hedong Jiang
Hedong Jiang
, 
Pingchun Guo
Pingchun Guo
, 
Hua Zhu
Hua Zhu
 et 
Yanxiang Wang
Yanxiang Wang
   | 07 sept. 2022
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Publié en ligne: 07 sept. 2022
Pages: 170 - 180
Reçu: 21 août 2021
Accepté: 13 juin 2022
DOI: https://doi.org/10.2478/msp-2022-0019
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© 2022 Jiake Li et al., published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Fig. 1

The schematic diagram of GO preparation process. GO, graphene oxide
The schematic diagram of GO preparation process. GO, graphene oxide

Fig. 2

Schematic diagram of the rGO/ZnO composite powder preparation process. GO, graphene oxide; rGO, reduced graphene oxide
Schematic diagram of the rGO/ZnO composite powder preparation process. GO, graphene oxide; rGO, reduced graphene oxide

Fig. 3

Schematic diagram of the rGO/ZnO photoanodes preparation process. GO, graphene oxide; rGO, reduced graphene oxide
Schematic diagram of the rGO/ZnO photoanodes preparation process. GO, graphene oxide; rGO, reduced graphene oxide

Fig. 4

XRD patterns of the samples prepared by the improved Hummers method. GO, graphene oxide
XRD patterns of the samples prepared by the improved Hummers method. GO, graphene oxide

Fig. 5

XRD patterns (A) ZnO prepared by solution combustion method, (B) rGO/ZnO with 1.25% rGO prepared by the chemical reduction method. rGO, reduced graphene oxide
XRD patterns (A) ZnO prepared by solution combustion method, (B) rGO/ZnO with 1.25% rGO prepared by the chemical reduction method. rGO, reduced graphene oxide

Fig. 6

FT-IR spectra of GO prepared the improved Hummers, and rGO/ZnO with 1.25% rGO prepared by chemical reduction method. GO, graphene oxide; rGO, reduced graphene oxide
FT-IR spectra of GO prepared the improved Hummers, and rGO/ZnO with 1.25% rGO prepared by chemical reduction method. GO, graphene oxide; rGO, reduced graphene oxide

Fig. 7

Raman spectra of GO and rGO prepared by the improved Hummers and the chemical reduction methods, respectively. GO, graphene oxide; rGO, reduced graphene oxide
Raman spectra of GO and rGO prepared by the improved Hummers and the chemical reduction methods, respectively. GO, graphene oxide; rGO, reduced graphene oxide

Fig. 8

SEM images of GO prepared by the improved Hummers method: (A) low-magnification and (B) high-magnification. GO, graphene oxide
SEM images of GO prepared by the improved Hummers method: (A) low-magnification and (B) high-magnification. GO, graphene oxide

Fig. 9

TEM images (A) and its SAED of GO (B) prepared by the improved Hummers method. GO, graphene oxide
TEM images (A) and its SAED of GO (B) prepared by the improved Hummers method. GO, graphene oxide

Fig. 10

(A) SEM images of the as-synthesized ZnO by solution combustion, (B) rGO, (C) the cross section of rGO/ZnO photoanode at low-magnification, and (D) high-magnification. Note: rGO adding content 1.25%. rGO, reduced graphene oxide
(A) SEM images of the as-synthesized ZnO by solution combustion, (B) rGO, (C) the cross section of rGO/ZnO photoanode at low-magnification, and (D) high-magnification. Note: rGO adding content 1.25%. rGO, reduced graphene oxide

Fig. 11

J-V curves of DSSCs assembled by rGO/ZnO as the photoanodes by adding different contents of rGO. DSSCs, dye-sensitized solar cells; rGO, reduced graphene oxide
J-V curves of DSSCs assembled by rGO/ZnO as the photoanodes by adding different contents of rGO. DSSCs, dye-sensitized solar cells; rGO, reduced graphene oxide

Fig. 12

EQE curves of D0, D1, D2, D3, D4, and D5. EQE, external quantum efficiency
EQE curves of D0, D1, D2, D3, D4, and D5. EQE, external quantum efficiency

Fig. 13

Nyquist curves of D0, D1, D2, D3, D4, and D5 under dark conditions
Nyquist curves of D0, D1, D2, D3, D4, and D5 under dark conditions

Performance parameters of DSSCs assembled by rGO/ZnO as the photoanodes by adding different contents of rGO

Samples Adding content/wt.% Voc/V Jsc/mA/cm2 FF/% PCE/%
D0 0 0.63 12.73 64.70 5.20
D1 0.25 0.63 12.76 66.82 5.27
D2 0.75 0.65 12.83 66.94 5.42
D3 1.25 0.66 13.11 72.71 6.27
D4 1.75 0.63 11.79 69.92 5.51
D5 2.25 0.65 10.83 69.60 5.10
eISSN:
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Langue:
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Sujets de la revue:
Materials Sciences, other, Nanomaterials, Functional and Smart Materials, Materials Characterization and Properties
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