NEW JOURNAL OF CHEMISTRY
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2024
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IF 2.7
Yin Peng,Jianyu Wang,Liying Wang,Xijia Yang,Yang Gao,Xuesong Li,Wei Lü
Transparent TiO2 photoanodes offer promise for new solar technology due to their high light transmittance, but the persistently inadequate solar conversion efficiency continues to pose obstacles for practical application. This research utilized n-butyl titanate and black P25 TiO2 (B-P25) to construct transparent TiO2 photoanodes for quantum dot sensitized solar cells (QDSSCs). The B-P25 presents rich oxygen vacancies after reduction, along with the generation of more pore structures in the TiO2 photoanode films, facilitating the transport of photogenerated charge carriers in the photoanode films. Therefore, the photoelectric conversion efficiency (PCE) is significantly enhanced from 1.77% to 5.04%, with an increase in the short-circuit current density in the J–V curve from 8.10 to 17.67 mA cm−2. This study demonstrates that B-P25 prepared using the reduction method can effectively fabricate photoanodes with high photovoltaic performance, which improves the optical properties and solar cell efficiency of QDSSCs.
研究领域:
材料科学
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能源技术
✓ 已验证
产品关联
DOI
高影响因子
ECS Journal of Solid State Science and Technology
·
2021
·Vol. 10
·期 4
·045012
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IF 2.07
Wenhua Li,Meng Zheng,Zizun Tian,Guoqiang Long,Shule Zhang,Qianqiao Chen,Qin Zhong
Exploration of counter electrode (CE) catalysts with excellent reduction activity to Sn2− and low charge transfer resistance (Rct) is always a major challenge for the development of quantum dot sensitized solar cells. In this work, coral-like CoSe2 - nitrogen-doped porous carbon hydrides (CoSe2-NC) were successfully prepared by two-step calcination of zeolitic imidazolate framework (ZIF), including carbonization and selenization process. Scanning electron microscopy shows that the CoSe2-NC catalyst presents a coral-like microscopic morphology composed of nanospheres. Electrochemical impedance spectroscopy displays that the CoSe2-NC CE presents a low Rct of 1.04 Ω. The PCE of the QDSSC based CoSe2-NC CE is up to 5.06%，which is 26%, 87% higher than those of CoSe2 and NC CEs. The enhanced photovoltaic performance is attributed to the unique coral-like structure and the synergistic catalytic effect of CoSe2 and NC.
研究领域:
材料科学
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能源科学
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电化学
✓ 已验证
DOI
高影响因子
SUPERLATTICES AND MICROSTRUCTURES
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2020
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IF 2.12
Wenhui Li,Xijia Yang,Liying Wang,Xueyu Zhang,Xuesong Li,Wei Lü
One of important factors for improving the power conversion efficiency (PCE) of quantum dot-sensitized solar cells is to enhance the utilization of sunlight. Herein, we modified the wavelength range of incident sunlight from the counter electrode (CE) side to investigate the photoelectric performance of solar cells. The effect of illuminating CuS and Cu 2 S CE with different light ranges (including non-illumination, UV–visible light, NIR light and full-spectrum light) on cell performance was investigated. It has been shown that illuminating from both sides of cell induce substantial increase in PCE, and a 42.8% enhancement in PCE compared with that irradiating from the photoanode side has been achieved with a champion PCE of 5.6% (Voc = 0.6 V, Jsc = 21.7 mA cm −2 ) based on CuS CE. This strategy focuses on the neglected problem of light utilization of the CE, and provides a direction for realizing full-spectrum absorption of liquid-junction solar cells.
研究领域:
材料科学
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能源科学
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2019
·
IF 5.383
Hua Zhang,Xiaohe Ji,Nansong Liu,Qingfei Zhao
Carbon based composite counter electrodes (CEs) containing metal sulfides have shown excellent catalytic activity in quantum dot sensitized solar cells (QDSCs), but the series resistance of the device is still greatly larger than that of brass based CEs of Cu x S/brass. In this work, carbon nanotubes (CNTs) are incorporated into the binary system of graphene hydrogel (GH) and copper sulfide (CuS) during gelation to form CNT-GH-CuS composite CEs. Results show that the ternary CEs exhibit greatly higher conductivity than that of binary CNT-CuS and GH-CuS CEs, and the series resistance dramatically drops from ∼3 to 0.79 Ω which is similar to that of Cu x S/brass CEs. Due to the improved conductivity, catalytic activity and intimate contact with substrate, the assembled Zn–Cu–In–Se QDSCs receive a record power conversion efficiency of 14.02%.
研究领域:
材料科学
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能源技术
✓ 已验证
产品关联
DOI
高影响因子
Journal of Physical Chemistry C
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2014
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IF 4.835
Haijing Yu,Huili Bao,Ke Zhao,Zhonglin Du,Hua Zhang,Xinhua Zhong
Bi2S3 films consisting of two-dimensional interconnected Bi2S3 single-crystalline nanorod networks have been fabricated on a F:SnO2 (FTO) glass substrate through the formation of intermediate BiOI nanosheets from layer-structured BiI3 by chemical vapor deposition and subsequent hydrothermal transformation into Bi2S3 networks. A continuous lattice and structure-directed topotactic transformation mechanism is supposed for the formation of Bi2S3 network film. The prepared Bi2S3/FTO films were employed as counter electrode (CE) for CdSe quantum dot-sensitized solar cells for the first time and showed better photovoltaic performance than that from the convenient Pt CE. The influence of the preparation conditions for Bi2S3/FTO films on the resulting solar cell performance was systematically investigated and optimized with use of J–V curves, scanning electron microscopy (SEM), UV–vis absorption, and electrochemical impedance spectroscopy. To further improve the cell device efficiency, the modification of the Bi2S3 network CE with metal particles was also studied.
研究领域:
材料科学
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能源科学
✓ 已验证
产品关联
DOI
高影响因子
SUPERLATTICES AND MICROSTRUCTURES
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2017
·
IF 2.123
Qiqian Gao,Lianfeng Duan,Xueyu Zhang,Itaru Kamiya,Wei Lü
In the present work, {001}-faceted TiO 2 nanosheets were prepared via a one-step hydrothermal method and used as backbone scaffold of photoanodes of solar cells. The graphitic carbon nitride (g-C 3 N 4 ) was obtained by simple solid-state heat treatment and applied to modify the {001}-faceted TiO 2 nanosheet photoanodes. Compared with the photoanodes prepared from pure {001}-faceted TiO 2 nanosheets, the power conversion efficiency (PCE) of g-C 3 N 4 modified {001}-faceted TiO 2 nanosheet photoanodes was enhanced due to the suitable band-alignment between g-C 3 N 4 and TiO 2 . With 20% loading of g-C 3 N 4 in the photoanode, a maximum PCE of 4.23% with an open circuit voltage of 0.58 V, a short circuit current density of 15.5 mA/cm 2 , and a fill factor (FF) of 0.48 was achieved, giving 24.7% enhancement in the cell efficiency. Various characterizations were performed to understand the role of g-C 3 N 4 on the device performance, and the mechanisms that account for the improvement are suggested.
研究领域:
材料科学
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光化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2015
·Vol. 3
·期 43
·21922-21929
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IF 7.443
Suolong Yang,Pengxiang Zhao,Xiaochong Zhao,Liangti Qu,Xinchun Lai
Due to the ideal band gap and environmental friendliness, InP is a promising light-harvesting material in photovoltaic cells. However, “green” InP based quantum dot sensitized solar cells (QDSSCs) have been rarely reported. Herein, nearly monodispersed Sn doped InP (Sn:InP) quantum dots (QDs) were synthesized by the one-pot nucleation doping method, and used as the sensitizer in the construction of QDSSCs. High QD loadings on the TiO2 film electrodes were achieved by using the capping ligand-induced self-assembly (CLIS) sensitization technique. The resulting champion Sn:InP cell shows a power conversion efficiency (PCE) of 3.54% under AM 1.5G (simulated 1 sun illumination), which is remarkably higher than that of un-doped InP QD based ones. This improvement is ascribed to the regulation role of the band gap by Sn dopant in the InP QDs. The Sn:InP QDSSCs exhibit moderate efficiency, good reproducibility and stability. These new findings may pave the way for the performance improvements of other QD photovoltaic devices.
研究领域:
材料科学
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能源科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2018
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IF 2.891
Xing Du,Weixin Li,Lei Zhao,Xuan He,Hui Chen,Wei Fang
A facile in-situ modification of photoanode is proposed to construct a unique hierarchical TiO 2 /ZnO structure with the aim at suppressing charge recombination rate and enhancing light harvest efficiency. Foam is not only employed as the soft template to fabricate hierarchical porous TiO 2 films but also as the carrier to realize in-situ growth of one dimensional ZnO nanowires among the TiO 2 nanoparticles. The results revealed that the hierarchical porous TiO 2 nanoparticles could provide both large surface areas and suitable porosity for the loading of quantum dots. In the meantime, ZnO nanowire can act as scattering centers for light absorption and offer direct pathways for electron transportation, thus decreasing the undesired charge recombination process. Consequently, the novel ZnO nanowires in-situ modified hierarchical porous TiO 2 photoanode are used as photoanode material to boost the performances of CdSe sensitized solar cells by virtue of controlling the moderate growth of ZnO nanowires. As a result, a power conversion efficiency of 3.07% is obtained based on this modified photoanode, which manifests 39.5% improvement compared to that of the cells based on bare TiO 2 hierarchical porous films (2.20%) due to the improved interconnections between TiO 2 nanoparticles and FTO substrate caused by ZnO nanowires.
研究领域:
材料科学
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能源科学
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2019
·
IF 5.383
Zhuoyin Peng,Zhou Liu,Jianlin Chen,Yanjie Ren,Wei Li,Cong Li,Jian Chen
Single crystalline ZnO nano-array films are prepared by electrochemical deposition process , which are successfully introduced as an interlayer between FTO conductive glass substrate and TiO 2 nanoparticle films to fabricate the quantum dot sensitized solar cells. Different structure of ZnO nano-array films are modulated by the time of electrochemical deposition process, which have been mainly investigated the photovoltaic performance and charge transfer property of the solar cells. The enhancements of optical absorption properties and electron-hole separation properties on photo-electrodes have been observed by UV–Vis absorption and photoluminescence spectra. And electrochemical impedance spectra and photoluminescence decay analysis have indicated that the ZnO nano-array interlayer can effectively increase the rate of charge transfer in the quantum dot sensitized solar cells system. With the balance on the diameter, density and thickness of the ZnO nano-array interlayer, the photovoltaic conversion efficiency of FTO/ZnO/TiO 2 /CuInS 2 quantum dot sensitized solar cells have enhanced from 4.12% to 4.58% without any optimization of passivation , electrolyte and counter electrode.
研究领域:
材料科学
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物理化学
✓ 已验证
产品关联
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2020
·Vol. 7
·期 19
·3727-3734
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IF 5.958
Zizun Tian,Zhonglu Qi,Yuhao Yang,Hailong Yan,Qianqiao Chen,Qin Zhong
A Ti3C2/CuS composite has been fabricated as a counter electrode for quantum dot-sensitized solar cells by anchoring CuS nanoparticles on Ti3C2via a facile ion-exchange method at room temperature. The accordion-like Ti3C2 is well intercalated and coated with CuS nanoparticles at the optimized ratio of Ti3C2 to CuS. Both electrochemical impedance spectroscopy and Tafel polarization measurements indicate that the composite exhibits a significantly faster electrocatalytic rate towards the polysulfide reduction than pure CuS. The quantum dot-sensitized solar cell-based composite counter electrode displays an overall power conversion efficiency of 5.11% which is 1.5 times that obtained from the CuS counter electrode. The higher power conversion efficiency benefits from the improved short-circuit current density (20.86 mA cm−2), open-circuit voltage (0.56 V) and fill factor (0.45). The enhancement of photovoltaic performance is mainly attributed to the combined advantages of the excellent conductivity of the Ti3C2 skeleton and the abundant catalytically active sites of CuS nanoparticles.
研究领域:
材料科学
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能源技术
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电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Ming Chen,Feifei Yin,Zhonglin Du,Zhe Sun,Xie Zou,Xiaoli Bao,Zhenxiao Pan,Jianguo Tang
The development of highly-catalytic counter electrode (CE) materials is vital to the construction of quantum dot-sensitized solar cells (QDSCs) but is still challenging. Here, a novel self-assembly double-faced decorated carbon nanosheets with MOF-derived Cu x S nanospheres (DF-Cu x S/C NSs) were prepared as high-performance hybrid CEs for improving the catalytic activity towards polysulfide electrolytes and enhancing the performance of QDSCs. It is shown that the MOF-derived Cu x S nanospheres disperse well on the surface of the carbon NSs in the obtained DF-Cu x S/C NSs hybrids. Electrochemical characterization demonstrated that the DF-Cu x S/C NSs with moderate mass ratio exhibited enhanced electrocatalytic activity towards the reduction of the polysulfide redox couple (S n 2– /S 2– ) and decreased charge transfer resistance at the interface of the CE/electrolyte. Benefitting from the merits of this novel hybrid CE, the power conversion efficiency (PCE) of the CdSeTe QDs-based QDSCs is increased to 9.39%, which is higher than the pristine carrageenan (CA)-derived CEs (5.84%) and Cu-BTC-derived CEs (7.74%). With the further optimization of the substrate, the highest PCE of 11.36% was achieved based on the Ti mesh substrate supported hybrid CE.
研究领域:
材料科学
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能源科学
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纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Energy Materials
·
2022
·
IF 6.959
Yi Jiang,Yile Dai,Qing Wang,Jianfeng Dai
While transparent photoanodes are highly desired for smart energy devices, their performance is still far from expectation. In the present work, a transparent TiO2 film was prepared using a two-step spin-coating method, which served as photoanodes of quantum dot-sensitized solar cells (QDSSCs). A porous TiO2 photoanode prepared by P25 was also fabricated for comparison. Compared with the porous TiO2 photoanode, QDSSCs based on the transparent TiO2 film showed an obviously declined short-circuit current density (Jsc) but greatly improved fill factor (54.3%), resulting in a larger power conversion efficiency (4.32%). The reason is due to the decreased series resistance and increased shunt resistance of solar cells based on the transparent TiO2 photoanode, which is consistent with the requirement of solar cells to load resistance. The present work proves that the transparent TiO2 film has great potential in the field of transparent solar cells.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）