JOURNAL OF SOLID STATE ELECTROCHEMISTRY
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2015
·Vol. 20
·期 1
·29-36
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IF 2.446
Meng Ling,Liu Yingru,Zhang Jingbo,Bai Shouli,Luo Ruixian,Chen Aifan,Lin Yuan
A novel two-phase method was employed to directly deposit PbS quantum dots (QDs) on nanocrystalline SnO 2 thin films. In the two-phase method, the nanocrystalline SnO 2 thin film with adsorption of Pb 2+ ions was placed in an aqueous solution, and S 2− ions were dissolved in an oil solution. As two solutions were contacted, S 2− ions prefer to transfer to the aqueous solution and diffuse to the thin film surface with the adsorbed Pb 2+ ions to homogeneously form monodispersed PbS QDs on the nanocrystalline thin film. The homogeneous monodispersed QDs-sensitized thin film was used as a photoelectrode to fabricate QDs-sensitized solar cell. The loaded amount of PbS QDs and the thickness of ZnS passivation layer were optimized to obtain the highest light-to-electric conversion efficiency of 1.01 % under the simulated AM 1.5 illumination, which is increased by 61 % compared with that of the PbS QDs-sensitized solar cell employing the successive ionic layer adsorption and reaction (SILAR). The solar cell with homogeneous sensitization of QDs generates a photocurrent density of 11.09 mA·cm −2 , which is 2.4 times higher than that of the unhomogeneous one prepared by SILAR. The conversion efficiency enhancement mechanism due to the two-phase method was discussed in detail through the measurements of intensity-modulated photovoltage spectrum and electrochemical impedance spectroscopy.
研究领域:
材料科学
·
光电化学
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产品关联
DOI
高影响因子
ACS Omega
·
2024
·
IF 3.7
Yu Zhang,Quan Xie,Lin Lyu,Jiang Zou,Zhou Lu
A specific matrix sensor that can operate at low temperatures and has a high sensing response is crucial for monitoring flammable VOC gases. In this study, a nanostructured SnO2 thin film was successfully produced using a suitable chemical deposition method, and its sensing properties were comprehensively analyzed. The SEM images revealed that the thin film of the nanostructured SnO2 is made up of two different sizes of broccoli-like structure nanoparticles. The sensor, which is based on this unique micronano structure, demonstrated a high sensing response (44), low operating temperature (200 °C), and fast response time (6s). Additionally, the nanostructured sensor exhibited excellent resistance to humidity interference and long-term stability. Moreover, DFT is employed to evaluate the electronic properties and to systematically explain the gas sensing mechanism of the nanostructured sensor based on the SnO2 thin film.
研究领域:
材料科学
·
化学
·
传感技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2020
·
IF 6.182
Jing Zhou,Xintong Zhang,Hanbo Chen,Zheqing Tang,Dan Meng,Kailin Chi,Yongmao Cai,Gengxin Song,Yu Cao,Ziyang Hu
The electron transport layer (ETL) of Sb 2 Se 3 thin film solar cells is not only responsible for electron extraction and transport but also manipulates the orientation of the Sb 2 Se 3 photoactive layer’s growth, which is crucial for performance optimization. In this study, the dual functionality of solution-processed SnO 2 film treated with CdCl 2 was achieved as the ETL in Sb 2 Se 3 solar cells. The CdCl 2 treatment simultaneously improves the efficacy of the SnO 2 ETL and induces the longitudinal growth of Sb 2 Se 3 grains. These two aspects effectively enhance electron transport and/or extraction, thereby reducing the charge recombination, which contributes to the improvement of all device parameters. The results demonstrate that CdCl 2 treatment optimizes the interface properties of the SnO 2 ETL, providing a facile and effective method for enhancing the performance of the Sb 2 Se 3 solar cell.
研究领域:
材料科学
·
光伏技术
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DOI
高影响因子
Journal of Materials Chemistry A
·
2022
·Vol. 11
·期 2
·901-913
·
IF 14.511
Yapeng Sun,Jiankai Zhang,Huangzhong Yu
In the last two years, studies on SnO2 preparation and optimization have proved to be effective paths toward the Schottky limit of perovskite solar cells. Herein, we used an electrochemical deposition method to obtain polycrystalline SnO2 film at room temperature for the first time. The method has the advantage of simplicity and efficiency using electrochemistry to realize deposition, adsorption, and protection of the SnO2 film, avoiding a more complex regulation process than the chemical bath deposition method. Benefiting from the optimization process, the method could achieve adjustable work function of the SnO2 film by controlling the pH of the electrolyte, which is conducive for reducing mismatched energy levels between the SnO2 film and the perovskite layer. Besides, the obtained SnO2 film is densely and uniformly distributed along the substrate profile, leading to better light transmission. More importantly, this method can be applied to prepare SnO2 film on large area and flexible substrates. Finally, the device based on SnO2 film prepared with pH = 1 electrolyte achieves the highest performance of 22.85%, which is higher than that of the device based on the commercial colloidal dispersion SnO2 film (21.72%). These multi-advantages of the method make it competitive for future commercialization.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL PHYSICS LETTERS
·
2021
·
IF 2.328
Zhiqiang Li,Mingyue Sun,Beiping Dong,Juncheng Liu
Sb/Yb co-doped SnO 2 film was deposited on the glass with sol–gel to prepare high thermal insulation film with high visible transmittance. Its crystal structure is consistent with that of SnO 2 . Its sheet resistance first decreases then increases with Yb doping content, gets the minimum at 9.0 mol%, reduced about an order of magnitude compared with Sb doped film. Its visible average transmittance (380–780 nm) fluctuates a bit, gets the minimum 79.0% at 9.0 mol%, the maximum 84.1% at 6.0 mol%. Its average near-infrared transmittance (780–2500 nm) gets the minimum 27.9% at 9.0 mol%, decreases 70.2% compared with the glass.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
OPTICAL MATERIALS
·
2024
·
IF 3.8
B.L. Zhu,X.J. Cai,C.C. Wang,J. Wu,J.L. Yao,W.Q. Sun
Sb-doped SnO 2 (ATO) films were prepared with different RF powers ( P RF ) under two O 2 flow rates ( F O 2 ) by magnetron sputtering , and then subjected to rapid thermal annealing (RTA) treatment. The effects of P RF , F O 2 , and RTA on the crystallinity, stress, surface morphology , conductive properties, transmittance in visible-light range ( T Vis ), and energy gap ( E g ) of the films were investigated. As the P RF increases, the film crystallinity improves or first improves and then slightly degrades, and the compressive stress decreases. With increasing P RF , the surface changes from textured to granular morphology and from granular to honeycomb-like morphology under two F O 2 , respectively. Meanwhile, the conductive properties first enhance and then degrade, and the T Vis and E g tend to decrease, especially at higher P RF . Basically, the films prepared with higher F O 2 have lower compressive stress, inferior conductive properties, and larger T Vis and E g compared with the films prepared with lower F O 2 . After RTA, the film crystallinity obviously improves, the compressive stress transforms into tensile stress , and the surface morphology has not undergone significant changes. Meanwhile, the conductive properties significantly enhance and E g obviously increases. The T Vis of the films prepared with lower F O 2 can be increased by RTA. The influence mechanisms of the above factors on the structure and optoelectronic properties of the ATO films were explored, and ultimately, the ATO films have the T Vis of 76.35–80.86%, sheet resistance of 51.7–91.9 Ω/sq., and quality factor of 1.03–1.67 × 10 −3 Ω −1 within the optimized P RF range. Polymer-dispersed liquid crystal (PDLC) films were fabricated using optimized performance ATO films as electrodes, and their on-state transmittance, off-state transmittance, threshold electric field, and saturation electric field were 2.08–4.61%, 61.69–68.56%, 0.656–0.796 V/μm, and 1.68–2.108 V/μm, respectively. The current results indicate the potential application of ATO films in PDLC films as electrode.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
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