Fabrication of Cd-Doped TiO2 Nanorod Arrays and Photovoltaic Property in Perovskite Solar Cell

Li, Yanmei; Guo, Yi; Li, Yanhong; Zhou, Xingfu

doi:10.1016/j.electacta.2016.03.091

Cited by 61 publications

(16 citation statements)

References 31 publications

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“…In order to solve the issues, some methods have been adopted, such as metal doping [14, 15] and nonmetal doping [16]. It has been reported that N-doped TiO 2 as a photoanode of dye-sensitized solar cells (DSSCs) can improve the energy conversion efficiency due to the change of properties of TiO 2 , such as electron lifetime prolongation, charge transfer resistance reduction, and visible light absorption extension [17, 18].…”

Section: Introductionmentioning

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: Introductionmentioning

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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“…Thus, other interface materials are required. There are many n-type metal oxides such as zinc oxide (ZnO) [ 17 , 18 ], titanium oxide (TiO x ) [ 19 , 20 ], and tin oxide (SnO 2 ) [ 21 , 22 , 23 ], which has a low work function, and improves the electron extraction ability when used as the interlayer. However, in order to achieve good material quality, these metal oxides usually require a high temperature process, which is not suitable for the p-i-n structure in PSCs because the high process temperature will destroy the underlying perovskite materials.…”

Section: Introductionmentioning

confidence: 99%

Improving Electron Extraction Ability and Device Stability of Perovskite Solar Cells Using a Compatible PCBM/AZO Electron Transporting Bilayer

et al. 2018

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Due to the low temperature fabrication process and reduced hysteresis effect, inverted p-i-n structured perovskite solar cells (PSCs) with the PEDOT:PSS as the hole transporting layer and PCBM as the electron transporting layer have attracted considerable attention. However, the energy barrier at the interface between the PCBM layer and the metal electrode, which is due to an energy level mismatch, limits the electron extraction ability. In this work, an inorganic aluminum-doped zinc oxide (AZO) interlayer is inserted between the PCBM layer and the metal electrode so that electrons can be collected efficiently by the electrode. It is shown that with the help of the PCBM/AZO bilayer, the power conversion efficiency of PSCs is significantly improved, with negligible hysteresis and improved device stability. The UPS measurement shows that the AZO interlayer can effectively decrease the energy offset between PCBM and the metal electrode. The steady state photoluminescence, time-resolved photoluminescence, transient photocurrent, and transient photovoltage measurements show that the PSCs with the AZO interlayer have a longer radiative carrier recombination lifetime and more efficient charge extraction efficiency. Moreover, the introduction of the AZO interlayer could protect the underlying perovskite, and thus, greatly improve device stability.

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“…As reported, one dimensional (1D) nanostructures could offer a straightforward pathway for electron transport, a wide space for effective pore filling of perovskites or hole transport materials, and a large surface area for carrier extraction, thus improving the photovoltaic performance of PSCs . Up to now, different kinds of 1D TiO 2 structures, such as nanorods, nanocone, nanowires, and nanotubes, have been used in PSCs. So far, there are few reports about 1D SnO 2 nanostructured ETMs for PSCs, and neither of them have so satisfactory PCE.…”

Section: Introductionmentioning

confidence: 99%

Facile Fabrication of SnO₂ Nanorod Arrays Films as Electron Transporting Layer for Perovskite Solar Cells

Wang

Cai

et al. 2018

Solar RRL

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As the vital competent in high performance perovskite solar cells (PSCs), the inorganic metal oxide electron transporting materials (ETMs) with tailored architectures are responsible for extracting and transporting photogenerated electrons and preventing the recombination effectively. Here, a facile hydrothermal method is demonstrated for the growth of highly crystalline and uniform 1D SnO 2 nanorod arrays (SR) with excellent optical property, which are further successfully exploited as ETMs in PSCs. Both length and diameter of 1D SR are tuned carefully by optimizing the hydrothermal process. Power conversion efficiency (PCE) as high as 16.7% can be obtained for PSCs based on these SR. Furthermore, a graded heterojunction (GHJ) configuration was built by intercalating a TiO 2 thin interlayer to improve the band alignment between perovskite and SR, which pushes the PCE to 18.7% with better ambient stability. This work demonstrates that the SR can act as a promising candidate for ETM in PSCs, and provides a workable stategy to improve the performance of PSCs.

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Fabrication of Cd-Doped TiO2 Nanorod Arrays and Photovoltaic Property in Perovskite Solar Cell

Cited by 61 publications

References 31 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

Improving Electron Extraction Ability and Device Stability of Perovskite Solar Cells Using a Compatible PCBM/AZO Electron Transporting Bilayer

Facile Fabrication of SnO₂ Nanorod Arrays Films as Electron Transporting Layer for Perovskite Solar Cells

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Fabrication of Cd-Doped TiO2 Nanorod Arrays and Photovoltaic Property in Perovskite Solar Cell

Cited by 61 publications

References 31 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

Improving Electron Extraction Ability and Device Stability of Perovskite Solar Cells Using a Compatible PCBM/AZO Electron Transporting Bilayer

Facile Fabrication of SnO2 Nanorod Arrays Films as Electron Transporting Layer for Perovskite Solar Cells

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Facile Fabrication of SnO₂ Nanorod Arrays Films as Electron Transporting Layer for Perovskite Solar Cells