Effect of energy level matching on the enhancement of photovoltaic response about oxide/Zn2SnO4 composites

Li, Xiangyang; Zheng, Haiwu; Zhang, Zhenlong; Liu, Xiansheng; Wan, Rui-Qin; Zhang, Weifeng

doi:10.1039/c0jm02249g

Cited by 63 publications

(18 citation statements)

References 71 publications

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“…The absorption intensity of N-TiO 2 is stronger than that of un-doped TiO 2 . The energy band gap (Eg) can be calculated based on the absorption spectra using the Tauc equation [24]. The Tauc curve is shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

Enhancement of Perovskite Solar Cells Efficiency using N-Doped TiO2 Nanorod Arrays as Electron Transfer Layer

Zhang

Wang

et al. 2017

Nanoscale Res Lett

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In this paper, N-doped TiO2 (N-TiO2) nanorod arrays were synthesized with hydrothermal method, and perovskite solar cells were fabricated using them as electron transfer layer. The solar cell performance was optimized by changing the N doping contents. The power conversion efficiency of solar cells based on N-TiO2 with the N doping content of 1% (N/Ti, atomic ratio) has been achieved 11.1%, which was 14.7% higher than that of solar cells based on un-doped TiO2. To get an insight into the improvement, some investigations were performed. The structure was examined with X-ray powder diffraction (XRD), and morphology was examined by scanning electron microscopy (SEM). Energy dispersive spectrometer (EDS) and Tauc plot spectra indicated the incorporation of N in TiO2 nanorods. Absorption spectra showed higher absorption of visible light for N-TiO2 than un-doped TiO2. The N doping reduced the energy band gap from 3.03 to 2.74 eV. The photoluminescence (PL) and time-resolved photoluminescence (TRPL) spectra displayed the faster electron transfer from perovskite layer to N-TiO2 than to un-doped TiO2. Electrochemical impedance spectroscopy (EIS) showed the smaller resistance of device based on N-TiO2 than that on un-doped TiO2.Electronic supplementary materialThe online version of this article (doi:10.1186/s11671-016-1811-0) contains supplementary material, which is available to authorized users.

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Section: Resultsmentioning

confidence: 99%

Enhancement of Perovskite Solar Cells Efficiency using N-Doped TiO2 Nanorod Arrays as Electron Transfer Layer

Zhang

Wang

et al. 2017

Nanoscale Res Lett

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“…This agrees with the report which demonstrated that Sb atoms can be well incorporated into SnO 2 crystalline structure even at 20% (atomic) doping level. 19 Figure 2 shows the SEM images of Sb-SnO 2 with varied Sb doping concentration. The grain sizes were estimated to be 65 6 5, 76 6 6, and 82 6 3 nm for Sb-SnO 2 with the Sb doping concentration of 5%, 10%, and 15%, respectively.…”

Section: Resultsmentioning

confidence: 99%

“…The increase of grain size could be due to the incorporation of Sb atoms into the SnO 2 lattice to make the unit-cell volume increase. 19 Figure 3 shows the UV-vis absorption spectra of Sb-SnO 2 with varied Sb doping concentration. With the increase of Sb doping concentration, the intensity of the absorption becomes weaker.…”

Section: Resultsmentioning

confidence: 99%

Enhanced separation efficiency of photoinduced charges for antimony-doped tin oxide (Sb-SnO2)/TiO2 heterojunction semiconductors with varied Sb doping concentration

Zhang

Mao

2014

Journal of Applied Physics

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In this paper, antimony-doped tin oxide (Sb-SnO2) nanoparticles were synthesized with varied Sb doping concentration, and the Sb-SnO2/TiO2 heterojunction semiconductors were prepared with Sb-SnO2 and TiO2. The separation efficiency of photoinduced charges was characterized with surface photovoltage (SPV) technique. Compared with Sb-SnO2 and TiO2, Sb-SnO2/TiO2 presents an enhanced separation efficiency of photoinduced charges, and the SPV enhancements were estimated to be 1.40, 1.43, and 1.99 for Sb-SnO2/TiO2 composed of Sb-SnO2 with the Sb doping concentration of 5%, 10%, and 15%, respectively. To understand the enhancement, the band structure of Sb-SnO2 and TiO2 in the heterojunction semiconductor was determined, and the conduction band offsets (CBO) between Sb-SnO2 and TiO2 were estimated to be 0.56, 0.64, and 0.98 eV for Sb-SnO2/TiO2 composed of Sb-SnO2 with the Sb doping concentration of 5%, 10%, and 15%, respectively. These results indicate that the separation efficiency enhancement is resulting from the energy level matching, and the increase of enhancement is due to the rising of CBO.

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“…10b)of the SZTO composite can be constructed based on the information of Efb and Eg of SnO2 and ZTO.Apparently, the Ecb of SnO2 is more negative than that of ZTO, while the valence band top potential (Evb) of ZTO is more positive than that of SnO2. Similar band structure of SZTO composite has been proposed[34,35]. Thus, a type−II heterojunction can be expected.…”

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confidence: 88%

“…This strategy is more effective than the doping process to improve the photocatalytic performance as the formation of mid−gap or vacancy states can be largely avoided. The literatures indicated that ZTO could be coupled with WO3, Fe2O3, ZnO, SnO2, g−C3N4, and BiOI and the resulted composites showed enhanced sensor, electrical, or photovoltaic responses [9,13,31−36], as well as the photocatalytic activity [13,30,34,35]. Moreover, the activity could be even extended to the visible light region by coupling with some narrow bandgap semiconductors like g−C3N4 and BiOI [7,8].…”

Section: Introductionmentioning

confidence: 99%

One-pot hydrothermal synthesis of highly efficient SnOx/Zn2SnO4 composite photocatalyst for the degradation of methyl orange and gaseous benzene

Wang

Meng

et al. 2017

Applied Catalysis B: Environmental

121

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Effect of energy level matching on the enhancement of photovoltaic response about oxide/Zn2SnO4 composites

Cited by 63 publications

References 71 publications

Enhancement of Perovskite Solar Cells Efficiency using N-Doped TiO2 Nanorod Arrays as Electron Transfer Layer

Enhancement of Perovskite Solar Cells Efficiency using N-Doped TiO2 Nanorod Arrays as Electron Transfer Layer

Enhanced separation efficiency of photoinduced charges for antimony-doped tin oxide (Sb-SnO2)/TiO2 heterojunction semiconductors with varied Sb doping concentration

One-pot hydrothermal synthesis of highly efficient SnOx/Zn2SnO4 composite photocatalyst for the degradation of methyl orange and gaseous benzene

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