JOURNAL OF SOLID STATE ELECTROCHEMISTRY
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2019
·Vol. 23
·期 11
·3031-3041
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IF 2.531
Deng Yafeng,Ma Zhanhong,Ren Fengzhang,Wang Guangxin
In spite of the TiO 2 compact layer (TCL) being widely used, it still needs more study. This paper took Ni-doped TCLs as the research target, using an innovative two-step method perfectly prepared Ni-doped TCLs with different thicknesses. And then on the basis of Ni-doped TCLs, the TiO 2 nanorod array (TNA) films were successfully prepared. The effects of Ni-doped TCLs with different thicknesses on the morphology, structure, and photoelectric performance of TNA films were investigated. The results indicated that Ni-doped TCLs with appropriate thickness can significantly improve performance of TNA films and obtain satisfactory PCE stability with time. Compared with the TNA films based on Ni:TCL5, Ni:TCL10, and Ni:TCL30, the TNA film with Ni:TCL20 exhibited better comprehensive photoelectric performance, the DSSCs based on this TNA film achieved the highest J sc (10.191 mA cm −2 ), V oc (0.574 V), PCE (4.42%), and the most excellent PCE stability with time.
研究领域:
材料科学
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能源科学
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2025
·
IF 3.9
Li Siyuan,Li Liyun,Liu Xu,Wang Yanlai,Wang Ligang
To address the high cost and scarcity of traditional platinum (Pt) counter electrodes, this study designed a novel non-Pt counter electrode material: nitrogen-doped hollow mesoporous carbon sphere (NCS)-loaded SnS 2 @SnO 2 heterojunctions (SnS 2 @SnO 2 /NCSs). By optimizing the mass ratio of Sn/S precursors to NCSs, the morphology of the composite was tailored. Comprehensive characterization via XRD, XPS, SEM, TEM, and Raman spectroscopy revealed that SnS 2 @SnO 2 nanoparticles (10–20 nm) were uniformly distributed within the internal/external walls and cavities of the NCSs via mesoporous confinement, forming a 3D conductive network. Nitrogen doping (I D /I G = 1.12) endowed the carbon matrix with abundant active sites, while the band alignment of the SnS 2 @SnO 2 heterojunction significantly enhanced catalytic activity. Electrochemical tests demonstrated a charge transfer resistance (R ct = 22.25 Ω·cm 2 ) close to Pt (15.78 Ω·cm 2 ), with reduced low-frequency diffusion impedance. When integrated into dye-sensitized solar cells (DSSCs), the SnS 2 @SnO 2 /NCSs-based device achieved a power conversion efficiency (PCE) of 7.32% (J sc = 17.23 mA·cm⁻ 2 , V oc = 737.46 mV, FF = 0.57), representing a 36% improvement over the pure heterojunction (5.38%) and approaching Pt-based devices (8.39%). This work provides a cost-effective strategy for developing high-performance non-Pt counter electrodes.
研究领域:
材料科学
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纳米技术
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电化学
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可再生能源
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DOI
高影响因子
Journal of Physical Chemistry C
·
2020
·
IF 4.189
Yashuai Pang,Yang Zhang,Haiwu Zheng,Qiongzhe Yu,Xu Chen,Jihuai Wu,Qiwei Jiang
To enable the ZnO photoanode obtain superior photovoltaic performance, here, we design a T-ZnOw/ZnONP double-layer structure composite photoanode, in which tetra-needle-like zinc oxide whiskers (T-ZnOw) are used as the light scattering layer, the needles of T-ZnOw inserted into the ZnO nanoparticles (ZnONP) layer form a unique ZnO needle array structure, which acts as one-dimensional (1-D) low resistance channels and enables photoelectrons to reach the fluorine-doped tin oxide (FTO) conductive layer through relatively small number of interfaces. These characteristics make this double-layer structure photoanode possess lower photoelectron transport resistance and lower photoelectron recombination probability, resulting in higher photovoltaic efficiency compared with the traditional single-layer ZnONP photoanode. Moreover, the proposed self-adsorption and self-insertion preparation method of the T-ZnOw layer offer a novel strategy to form 1-D array structures.
研究领域:
材料科学
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光伏技术
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纳米材料
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能源工程
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DOI
高影响因子
MATERIALS TECHNOLOGY
·
2015
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IF 1.227
S. Chen,J. Tao,H. Tao,Y. Shen,L. Zhu,J. Jiang,X. Zeng,T. Wang
Cu2ZnSnS4 (CZTS) thin films were prepared by a low cost and large scale slurry sulphurisation process. The structure and morphology of the CZTS powders and films were characterised by X-ray diffraction, transmission electron microscopy and field emission–scanning electron microscopy respectively. The thermal behaviour of the CZTS slurry mixture was analysed by thermogravimetry coupled with differential scanning calorimetry. The absorption spectra of the thin film were characterised using an ultraviolet–visible–near infrared spectrophotometer. The effects of the sulphurisation temperature and soaking time on the structural, morphological, compositional and optical properties of the samples were investigated in detail. The results indicated that the crystals grew during sulphurisation, leading to some pores and cracks in the films, and the film possessed the optical band gap values between 1.45 and 1.48 eV. Under one sun (100 mW cm− 2) illumination, the dye sensitised solar cells with the CZTS counter-electrode (CE) showed comparable photovoltaic conversion efficiency (Eff = 3.141%) to that with a Pt CE (Eff = 2.761%). It is indicated that the as prepared CZTS films had potential for developing low cost and high efficient CE.
研究领域:
材料科学
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能源技术
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DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2013
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IF 2.206
Chunchen Yuan,Shuangshuang Guo,Shiming Wang,Lin Liu,Weilin Chen,Enbo Wang
A polyoxometalate (POM)-doped poly(3,4-ethylenedioxythiophene) (PEDOT) hybrid film counter electrode was successfully fabricated by electropolymerization in an environmentally friendly aqueous solution. The hybrid film presents a similar surface morphology to lotus leaf, the microstructure of which is a regularly distribution of mastoid shapes. As far as we know, it is the first time that POM-PEDOT hybrid film with mastoid morphology was fabricated. The application of the hybrid film counter electrodes (CEs) in dye-sensitized solar cells (DSSCs) was studied for the first time, and the efficiency of DSSCs based on hybrid film CEs was almost as high as DSSCs with Pt CEs. FTIR results indicated that POM polyanions had already been dispersed into the PEDOT matrix. Cyclic voltammetry, electrochemical impedance spectroscopy, and Tafel polarization test results show that the electrocatalytic ability for I3– reduction of the hybrid film CE is comparable to that of a Pt CE. In addition, the SiW11–PEDOT hybrid film has good electrochemical stability.
研究领域:
材料科学
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能源科学
·
化学
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DOI
高影响因子
RSC Advances
·
2014
·Vol. 5
·期 8
·5604-5610
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IF 3.708
Mei Yu,Jindan Zhang,Songmei Li,Yanbing Meng,Jianhua Liu
The performances of photovoltaic devices can be improved by increasing light-harvesting and charge collection respectively. The design and synthesis of nanocomposites with the ability of enhancing the generation and collection of the photo-generated electrons provide a significant way to improve the power conversion efficiency (PCE). Herein, SWNTs@(TiO2/Ag/Au) nanocomposites were synthesized and successfully integrated into photoanode films of dye-sensitized solar cells (DSSCs) to improve the power conversion efficiency. The synthesis processes were based on multi-functional DNA. DNA not only works as a dispersing agent preventing SWNTs bundling but also as a sacrificial mold assembling TiO2, Ag and Au nanoparticles on the surface of the SWNTs. The synthesized SWNTs@(TiO2/Ag/Au) nanocomposites enhance the charge collection and light-harvesting of DSSCs simultaneously. With 2.45 wt% SWNTs@(TiO2/Ag/Au) nanocomposites incorporating into the photoanode films, the PCE of the DSSCs increases from 6.8% to 8.3%.
研究领域:
材料科学
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纳米科技
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能源化学
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光伏器件
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表面科学
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胶体与界面化学
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DOI
高影响因子
Journal of Materials Chemistry A
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2026
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IF 9.2
Ying-Chu Chen,Ting-Ya Wu,Chih-Hung Tsai,Yu-Kuei Hsu
The integration of photovoltaics with electrochemical energy storage (EES) into monolithic photo–rechargeable systems represents a promising approach for sustainable, off–grid power sources, particularly in the context of the Internet of Things (IoT). Herein, we report a high–performance photo–capacitor (PC) constructed by coupling two series–connected dye–sensitized solar cells (DSSCs) with an asymmetric Bi//NiCo2S4 supercapacitor in a three–electrode configuration. Nickel cobalt sulfide (NiCo2S4) serves as a dual–function common electrode, providing both excellent electrocatalytic activity toward the I3-/I- redox reaction and high supercapacitive performance, while bismuth (Bi) is employed as a storage electrode, offering favorable energy alignment and wide operational potential. The optimized PC achieves a photovoltage exceeding 1.2 V under one–sun illumination and 0.9 V under 1000 lux LED illumination, with an areal capacitance of 170.4 mF cm-2 and an overall energy–storage efficiency of 7.05% under low–intensity solar irradiation (30 mW cm-2). The device demonstrates excellent rate capability, long–term cycling stability, and superior performance under dim–light conditions, confirming its potential as a standalone power supply for both indoor and outdoor IoT applications. This work highlights a strategic combination of band alignment, electrode design, and three–terminal architecture to realize efficient, standalone solar energy storage.
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高影响因子
Surfaces and Interfaces
·
2024
·
IF 5.7
Wei Ding,Chen Bai,Yuxuan Ren,Dong Fang,Jing Bai,Jiali Wen,Baoxiu Mi,Dapeng Cao,Zhiqiang Gao
Here, we report the first work relating to interface-modification to solid state dye sensitized solar cells (ss-DSSCs) with Cs 2 SnI 6 electrolyte by introducing KI or guanidine thiocyanate (GuSCN). Results show that KI and GuSCN modifications endow V OC improvements of 35% and 31% respectively, leading to power conversion efficiency ( PCE ) of 5.89% and 5.64%. Although both KI and GuSCN modification can retard charge recombination, their V OC improvement mechanism is not exactly the same: KI based devices mainly enjoy up-bending of the conducting band of TiO 2 and the down shift of the gap states in Cs 2 SnI 6 , while the V OC improvement in GuSCN devices is dominated by the lowering of gap states in Cs 2 SnI 6 . Structural analysis indicates that KI/GuSCN modification causes CsSnI 3 impurity and disrupts Cs 2 SnI 6 growth at the interface, while the bulk Cs 2 SnI 6 is uninfluenced, e.g., consisting cubic Cs 2 SnI 6 particles with good crystalline. Our work provides insights for V OC improvement in ss-DSSC with interface modification in terms of electronic and material structural aspects, which enrich property-material/interface structure relationship, beneficial to both ss-DSSC architecture and material engineering.
研究领域:
材料科学
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能源科学
·
界面工程
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DOI
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 45
·35635-35642
·
IF 3.84
Waqar Ahmad,Liang Chu,Majid Raissan Al-bahrani,Zhichun Yang,Siliang Wang,Luying Li,Yihua Gao
In this study, we synthesized monolithic copper-oxide nanorods (CuO-NRs) and doped into active super hydrophobic acetylene black (AB) nanocrystals via a fast solvation method. The developed short-dimension assemblies are utilized as counter electrode (CE) materials for energy harvesting in dye sensitized solar cells (DSSCs). Cyclic voltammetry and electrochemical impedance spectroscopy analyses reveal that the hybrid (CuO-NRs/AB) CE displays a fast reduction rate of I3− and boosts hole-cascading as compared to those of individual AB CEs, due to the superior catalytic characteristics of CuO-NRs and the good electrical conductivity of AB. The CuO-NRs/AB based DSSCs exhibit an enhanced power conversion efficiency (PCE) of 8.05%, in contrast to AB (6.51%) and pristine Pt (6.96%) CE based DSSCs under the same experimental conditions. The CuO-NRs/AB CE, along with impressive results, has prospective applications in robust DSSCs.
研究领域:
材料科学
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能源技术
·
纳米科技
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）