Improved photoelectric performance of DSSCs based on TiO2 nanorod array/Ni-doped TiO2 compact layer composites film

Deng, Yafeng; Ma, Zhanhong; Ren, Fengzhang; Wang, Guangxin

doi:10.1007/s10008-019-04399-y

Cited by 11 publications

(4 citation statements)

References 45 publications

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“…Among them, ε is the preset tolerable loss function, and the distance between the two dotted lines is 2/‖w‖. e optimization goal of the algorithm is to maximize the distance, that is, minimize the reciprocal of the logarithmic distance [20,21]. Finally, the process of finding the most suitable regression function is transformed into…”

Section: Support Vector Regression Algorithmmentioning

confidence: 99%

Light Industry Technology of Chiral Perovskite Nanomaterials Construction and Photoelectric Properties

Sun¹

2021

Advances in Materials Science and Engineering

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Perovskite nanomaterials have become a new research hotspot due to the many novel physical properties of quantum effects and have good application prospects in the field of optoelectronics. Among them, the realization of controllable fabrication of perovskite nanomaterials is the basis of performance studies and applications and is also a difficult point. Reducing production costs to improve manufacturing methods, further improve product controllability, promote advantages, or improve disadvantages will be very important for further application of perovskite nanomaterials. Therefore, this paper studies the construction of titanium ore nanomaterials by designing a novel preparation process and, at the same time, analyzes the related optoelectronic properties of the obtained materials. In this paper, a triangular PbI2 nanosheet having a uniform and controllable shape and size was successfully fabricated by physical vapor deposition through the introduction of a limited space, and related characterization was performed to show uniform controllability and high crystallinity. Using PbI2 nanosheets as the substrate, MAPbI3 nanosheets were further prepared and related characterizations proved that the obtained nanosheets had high crystallinity and excellent optical properties. The experiment proves that the peak position of the fluorescence spectrum obtained by Gaussian fitting is 800 nm and the half-peak width is about 45 nm. At the same time, MAPbI3 exhibits strong light absorption characteristics when the wavelength is less than 800 nm. This shows that this enclosed space deposition method can improve the uniformity and controllability of PbI2 and MAPbI3 nanosheet fabrication, which provides the basis for further research on MAPbI3 nanomaterials and references to the controllable growth of other nanomaterials.

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Section: Support Vector Regression Algorithmmentioning

confidence: 99%

Light Industry Technology of Chiral Perovskite Nanomaterials Construction and Photoelectric Properties

Sun¹

2021

Advances in Materials Science and Engineering

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“…In recent years, titanium dioxide (TiO 2 ) become one of the most attractive materials [23][24][25][26][27] that have been used to prepare functional 1D-PCs [28][29][30][31][32]. TiO 2 has a relatively large refractive index; therefore, when combined with materials with low refractive index, it results in a PBG.…”

Section: Introductionmentioning

confidence: 99%

Design and Optimization of One-Dimensional TiO2/GO Photonic Crystal Structures for Enhanced Thermophotovoltaics

et al. 2022

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In this paper, we theoretically explore the spectroscopic features of various one-dimensional photonic crystal (1D-PC)-based spectrally selective filters. The 1D-PC structure is composed of alternating layers of titanium dioxide (TiO2) and graphene oxide (GO). Employing the transfer matrix method (TMM), the impacts of the incidence angle, the number, and thicknesses of TiO2/GO layers in various 1D-PC stacks on the spectroscopic features of the filters are explored in detail. The proposed 1D-PC structures are designed for practical use for thermophotovoltaic (TPV) applications to act as filters that selectively transmit light below 1.78 μm to a GaSb photovoltaic cell, while light with longer wavelengths is reflected back to the source. The optimal design presented here consists of two Bragg quarter-wave 1D-PC filters with different central frequencies stacked to form a single structure. We demonstrate that our optimized 1D-PC filter exhibits a large omnidirectional stop band as well as a broad pass band and weak absorption losses. These features meet the fundamental exigencies to realize high-efficiency TPV devices. Additionally, we show that when integrated in a TPV system, our optimized filter leads to a spectral efficiency of 64%, a device efficiency of 39%, and a power density of 8.2 W/cm2, at a source temperature of 1800 K.

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“…Titanium dioxide (TiO 2 ) in thin films has been extensively used in a wide range of applications, such as sensors, self-cleaning, protective or antireflective layers, electrodes in electrochromic devices, electron transport layers in emerging photovoltaic cells (dyesensitized, perovskite and polymeric cells), photocatalysts, pigments, etc., due to its high transparency across the visible spectrum, appropriate band gap, effective charge separation ability, low toxicity and low price [1][2][3][4][5][6][7][8]. Titanium dioxide (titania) also displays abundant surface hydroxyl (OH) groups, high defect density and enhanced absorption in the ultraviolet (UV) range, such as UV materials [9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Effect of Target Sintering Temperature on the Morphological and Optical Properties of Pulsed Laser Deposited TiO2 Thin Films

et al. 2021

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In this paper, we report on the effect of titanium dioxide (TiO2) target sintering temperature on the morphological and optical properties of amorphous titanium dioxide thin films synthesized by pulsed laser deposition (PLD) on indium tin oxide (ITO) glass substrate and subsequently heat-treated in air at low temperature (150 °C). Three types of targets were used, unsintered (pressed at room temperature), sintered at 500 °C and sintered at 1000 °C. The surface morphology of the samples was investigated by scanning electron microscopy (SEM), and profilometry was used for thickness measurements. The structural properties of the films were examined by X-ray diffraction (XRD), while their optical properties were studied by UV‒vis spectroscopy. The obtained TiO2 thin films have an amorphous nature, as shown by XRD analysis. Profilometer showed that sintered target samples have more reliable thicknesses than unsintered ones. The SEM studies revealed the sufficient structural homogeneity of sintered target nanosized TiO2 films and agglomerates in the case of unsintered target film. The UV‒vis transmittance spectra showed high transparency in the visible range of PLD films, proportional to the target sintering temperature. The optical band gaps of the films deposited using the 500 °C and 1000 °C sintered targets are closer to those of anatase and rutile phases, respectively, which provides a promising approach to the challenges of amorphous TiO2-based nanostructures.

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Improved photoelectric performance of DSSCs based on TiO2 nanorod array/Ni-doped TiO2 compact layer composites film

Cited by 11 publications

References 45 publications

Light Industry Technology of Chiral Perovskite Nanomaterials Construction and Photoelectric Properties

Light Industry Technology of Chiral Perovskite Nanomaterials Construction and Photoelectric Properties

Design and Optimization of One-Dimensional TiO2/GO Photonic Crystal Structures for Enhanced Thermophotovoltaics

Effect of Target Sintering Temperature on the Morphological and Optical Properties of Pulsed Laser Deposited TiO2 Thin Films

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