ACS Applied Materials & Interfaces
·
2017
·
IF 7.504
Xiuwen Wang,Ying Xie,Buhe Bateer,Kai Pan,Yanqing Jiao,Ni Xiong,Song Wang,Honggang Fu
Cu2ZnSnS4 (CZTS) and Cu2ZnSn(S,Se)4 (CZTSSe) as promising photovoltaic materials have drawn much attention because they are environmentally benign and earth-abundant elements. In this work, the monodispersed, low-cost Cu2ZnSnS4 nanocrystals with small size have been controllably synthesized via a wet chemical routine. And CZTSSe could be easily prepared after selenization of CZTS. When they are employed as counter electrodes (CEs) for dye-sensitized solar cells (DSSCs), the power conversion efficiency (PCE) has been improved from 3.54% to 7.13% as CZTS is converted to CZTSSe, which is also compared to that of Pt (7.62%). The exact reason for the enhanced catalytic activity of I3– is discussed with the work function and density functional theory (DFT) when CZTSSe converted from CZTS. The results of a Kelvin probe suggest that the work function of CZTSSe (5.61 eV) is closer to that of Pt (5.65 eV) and higher than that of CZTS, which matched the redox shuttle potential better. According to the theory calculation, all the atomic and bond populations changed significantly when Se replaced partly the S on the CZTS system, especially in the Zn site. During the catalytic process as CEs, the adsorption energy obviously increased compared to those at other sites when I3– adsorbed on the Zn site in CZTSSe. So, Zn plays an important role for the reduction of I3– after CZTS is converted to CZTSSe. Based on above analysis, the reason for enhanced performance of DSSCs when CZTS converted to CZTSSe is mainly due to the enhancement of Zn-site activity. This work is beneficial for understanding the catalytic reaction mechanism of CZTS(Se) as CEs of DSSCs.
研究领域:
光伏材料
·
材料科学
·
纳米材料
·
能量转换
·
催化
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2020
·
IF 3.83
Qichen Zhao,Honglie Shen,Jiale Yang,Binkang Lai
The solution based on dimethylformamide (DMF) has shown promising application prospects in the fabrication of high-efficiency Cu 2 ZnSnS 4 solar cells. However, due to the high boiling temperature of the solvent, it is difficult to completely volatilize DMF during the evaporation process after spin coating , leading to remains of C and O atoms at grain boundaries, which severely restricts the photoelectric performance of solar cells. In this study, ethyl acetate (EA) with green character was used as an additive to optimize the film formation process of DMF-based CZTS precursor. The experimental results showed that using a small amount of EA additives could effectively improve morphology, crystallinity, composition distribution and electrical properties of the CZTS absorber. In addition, the CZTS and CdS heterojunctions exhibited a cliff-like energy band structure , and the optimized conduction band offset increased the activation energy required for the carrier recombination path, consequently reducing the carrier recombination. Compared with the pure DMF precursor solution, the photoelectric conversion efficiency of CZTS solar cells with an EA addition ratio of 10% was improved by 42%, and the open circuit voltage of the device reached 601 mV.
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
MATERIALS TECHNOLOGY
·
2015
·
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
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2017
·Vol. 41
·期 17
·9008-9013
·
IF 3.269
Lei Liu,Ruifeng Du,Yihe Zhang,Xuelian Yu
In this work, a sandwich-type electrochemical immunosensor was fabricated for the detection of carcino embryonic antigen (CEA) with the novel label of quaternary chalcogenide nanocrystals – Cu2ZnSnS4. They illustrated efficient intrinsic peroxidase-like activity in the catalytic reduction of peroxide hydrogen, which was ascribed to the synergistic effect of elemental composition in quaternary chalcogenides. Meanwhile, because of a high specific surface and good biocompatibility, three-dimensional Au nanoparticle loaded graphene aerogels were selected as substrates to capture more antibodies (Ab1). Under optimal conditions, the immunosensor exhibited a wide linear range from 0.5 pg mL−1 to 20 ng mL−1 with a low detection limit of 0.15 pg mL−1 (S/N = 3) for CEA detection. In addition, high sensitivity, excellent selectivity, good reproducibility and stability were obtained for the immunosensor. All of these results show that the novel immunosensor has a promising application for the quantitative detection of CEA in clinical diagnosis.
研究领域:
生物医学工程
·
分析化学
·
肿瘤学
✓ 已验证
DOI
高影响因子
CHEMISTRY OF MATERIALS
·
2026
·
IF 7.1
Renzhi Xiong,Dongchen Duan,Xiaoxue Ke,Keqin Chen,Yanhe Xiao,Baochang Cheng,Shuijin Lei
Heterophase junction engineering offers a revolutionary strategy for constructing polymorph photocatalysts with nearly perfect interfacial matching, thereby significantly optimizing charge dynamics. Nevertheless, existing heterophase junction systems still struggle to achieve both directional charge separation and efficient utilization of the full solar spectrum. In this study, a wurtzite-phase Cu2ZnSnS4 (W-CZTS)/kesterite-phase Cu2ZnSnS4 (K-CZTS) S-scheme heterophase junction was successfully constructed through the precise regulation of the spatial assembly between W-CZTS nanoparticles and K-CZTS nanosheets. This strategic structural design achieved three key breakthroughs: (i) the formation of atomically intimate interfaces with strong built-in electric fields, (ii) the integration of superior photothermal conversion capability, and (iii) directional charge separation while preserving optimal redox potentials. The developed heterophase junction catalyst demonstrated outstanding photothermal-assisted photocatalytic performance: under UV–vis–IR illumination, the average CO yield reached 68.4 μmol g–1 h–1, which represented a 9.6-fold enhancement compared to that without IR irradiation, and 76-fold and 114-fold higher than the performance of pristine K-CZTS and W-CZTS, respectively, under UV–vis irradiation. Furthermore, the catalyst demonstrated near-complete removal efficiency for both Cr(VI) reduction and Congo red degradation. This study establishes a paradigm for the development of high-performance heterophase junction photocatalysts and provides crucial insights for advancing solar-driven environmental remediation and fuel production.
✓ 已验证
产品关联
DOI
高影响因子
Chemical Science
·
2026
·
IF 8.1
Siyuan Ren,Muhammad Abbas,Zhibin Xie,Zilin Lu,Jasim Yousaf,Muhammad Ishaq,Zhuanghao Zheng,Jun Zhao,Shuo Chen,Guangxing Liang
The development of efficient and stable photocathodes from earth-abundant materials is a critical challenge for photoelectrochemical (PEC) hydrogen production. While Cu2ZnSnS4 (CZTS) is a promising absorber due to its ideal bandgap and non-toxic constituents, its performance is plagued by severe interfacial recombination. This work addresses this limitation through the precise engineering of a zinc-titanium oxide (Zn,Ti)O electron transport layer (ETL) in Mo/CZTS/CdS/(Zn,Ti)O/Pt photocathodes. We systematically investigate the influence of atomic-layer-deposited (Zn,Ti)O on the heterojunction's microstructure, band alignment, and charge transfer kinetics. A suite of characterization studies reveals that a suitable ETL thickness forms a dense, conformal coating and establishes an optimal spike-like conduction band offset at the CdS/(Zn,Ti)O interface, which minimizes bulk and interfacial charge-transfer resistance. Consequently, the optimized photocathode achieves a remarkable photocurrent density of 29.2 mA cm−2 at 0 VRHE and a high half-cell solar-to-hydrogen efficiency (HC-STH) of 7.02%. This study demonstrates that fine control of composite ETLs is a powerful strategy to unlock the potential of CZTS and related earth-abundant absorbers for scalable solar fuel production.
✓ 已验证
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2018
·
IF 6.735
Youchen Gu,Chen Ye,Xuewen Yin,Jianhua Han,Yu zhou,Heping Shen,Jianbao Li,Xiaojing Hao,Hong Lin
Cadmium sulfide (CdS) is the most widely used buffer material for a variety of thin-film solar cells including Cu 2 ZnSnS 4 . However, reports have shown that CdS film obtained by chemical bath deposition (CBD) is not the ideal buffer layer for pure sulfide CZTS solar cell. Zinc doping is a viable approach to modifying the CdS buffer film, but the present methods are far from satisfactory. Here, we innovatively developed an effective way of Zinc doping using partial electrolyte (PE) treatment, resulting in state-of-the-art buffer layer for solar cells based on high-surface-waviness CZTS light absorber. Our study shows that this Zn PE-treated CdS film improved the properties including coverage, full-range light transmittance and conduction band alignment with CZTS. Ultimately, the resultant modified CdS film boosted the open-circuit voltage of our devices by more than 100 mV, yielding power conversion efficiency (PCE) of 3.30%. We note that this is the highest efficiency that has been reported for all solution-processed CZTS 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
Journal of Materials Chemistry A
·
2025
·
IF 9.5
Yuting Sun,Bin Yao,Yuhong Jiang,Yongfeng Li,Xiaobo Du,Zhanhui Ding,Jiayong Zhang,Chunkai Wang,Ding Ma,Mengge Li,Yan Zhu,Xiaofei Sun,Ning Ding,Liyuan Shi
It is well known that the improvement of crystal quality and photoelectric properties of Cu2ZnSn(S,Se)4 (CZTSSe) is one of the key issues in enhancing power conversion efficiency (PCE). To resolve this problem, we selected Li2CO3 as a Li source to prepare Li-doped CZTSSe by annealing Li-doped Cu2ZnSnS4 (CZTS) precursor films in air, followed by selenization (CZTSSe-Li-A). It is interesting that the air annealing leads to the incorporation of Li and O into CZTSSe in the form of Li-O pairs, which improves the crystal quality and absorption coefficient (α) of CZTSSe-Li-A and decreases its hole concentration and resistivity compared with Li-doped CZTSSe prepared using Li-doped CZTS that is not annealed in air (CZTSSe-Li). By optimizing Li doping concentration, annealing temperature and time, the highest PCE of CZTSSe-Li-A solar cell without MgF anti-reflection layer reaches 11.13%, which is larger than the highest PCE of CZTSSe-Li solar cell (10.21%). Quantitative analysis indicates that the increased PCE of CZTSSe-Li-A solar cell compared to CZTSSe-Li solar cell is mainly attributed to the decrease in reverse saturation current density (J0) and series resistance (Rs) caused by thermal effect of the air annealing, followed by an increase in photogeneration density (JL) and shunt resistance (Rsh). The decreased J0 is due to a reduction in interfacial defect density, increased JL is due to increase in α and depletion region width, and decreased Rs and increased Rsh are due to improve crystal quality. This work offers a route for the improvement of PCE of CZTSSe solar cells.
研究领域:
材料科学
·
光伏技术
·
薄膜技术
·
固体物理
✓ 已验证
产品关联
DOI
高影响因子
Nature Energy
·
2025
·Vol. 10
·期 5
·630-640
·
IF 60.1
Wu Tong,Chen Shuo,Su Zhenghua,Wang Zi,Luo Ping,Zheng Zhuanghao,Luo Jingting,Ma Hongli,Zhang Xianghua,Liang Guangxing
Sulfide kesterite Cu 2 ZnSnS 4 (CZTS) is a competitive photovoltaic material, especially for multijunction solar cells. However, the device power conversion efficiency has remained stagnant for years. Deep-level defects, such as sulfur vacancies (V S ), cause serious non-radiative recombination of charge carriers. Here we propose a passivation strategy for V S through the heat treatment of the CdS/CZTS heterojunction in an oxygen-rich environment. In this process, V S are occupied by oxygen atoms, suppressing V S defects. In addition, the diffusion of Cd ions to the CZTS absorber layer, and the formation of positive Na–O and Sn–O complexes can passivate related defects. These effects led to a reduced charge recombination and favourable band alignment. We demonstrate a certified efficiency of 11.51% for air-solution-processed CZTS solar cells (bandgap of 1.5 eV) without any extrinsic cation alloying. The study offers insights into defect passivation and performance improvement mechanism of kesterite solar cells.
研究领域:
材料科学
·
太阳能电池研究
✓ 已验证
产品关联
DOI
高影响因子
Solar RRL
·
2019
·Vol. 3
·期 4
·1800354
·
IF 0
Zheng-Ji Zhou,Yue-Qing Deng,Pan-Pan Zhang,Dong-Xing Kou,Wen-Hui Zhou,Yue-Na Meng,Sheng-Jie Yuan,Si-Xin Wu
All-inorganic CsPbBr 3 perovskite solar cells (PSCs) have recently generated tremendous interest in next-generation cost-effective and stable photovoltaic devices. However, the commonly used costly and unstable organic hole transporting material (HTM) has so far prevented the further development and large-scale application of PSCs. In this work, Cu 2 ZnSnS 4 quantum dots (CZTS QDs) are exploited as a novel inorganic HTM for CsPbBr 3 PSCs. Due to the well-matched energy levels with the inorganic perovskite layer, a decent power conversion efficiency of 4.84% is achieved, which is quite comparable to the efficiency of the traditional device based on spiro-OMeTAD HTM (5.36%). Moreover, the photoluminescence (PL) and impedance spectroscopy further demonstrate the more effective hole extraction and transfer properties of the CZTS QDs interface layer, making it a promising material for fabricating efficient and stable PSCs toward practical applications.
研究领域:
材料科学
·
光伏技术
·
纳米技术
✓ 已验证
产品关联
DOI
RSC Advances
·
2014
·Vol. 5
·期 6
·4184-4190
·
IF 3.708
Qingwen Tian,Yong Cui,Gang Wang,Daocheng Pan
The metal chalcogenides are excellent choices as absorbers and buffer-layers in thin film solar cells. Versatile chemical approaches provide endless possibilities to prepare metal sulfide precursor solutions. Recently, Cu2ZnSnS(Se)4 thin films have played an important role in fabricating low-cost and high-efficiency solar cells. Here, we present a robust and low-cost 1,2-ethanedithiol/ethanolamine/2-methoxyethanol ternary solution process to prepare Cu2ZnSnS4 precursor solution and high-quality Cu2ZnSnS4 thin films. Low-cost Cu2O, ZnO and SnO are used as the raw materials, which can be easily dissolved in the 2-methoxyethanol solution of 1,2-ethanedithiol and ethanolamine at room temperature in air. By tuning the composition of the Cu2ZnSn(S,Se)4 thin film with a selenization process, an active-area power conversion efficiency of 7.34% has been achieved for Cu2ZnSn(S,Se)4 solar cell.
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
ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Xinan Shi,Yuxiang Wang,Hui Yu,Gang Wang,Lijian Huang,Daocheng Pan
The crystal quality of a Cu2ZnSn(S,Se)4 (CZTSSe) thin film is crucially important to a high-performance CZTSSe solar cell. After selenization, a bilayer CZTSSe thin film consisting of a large-grain top layer and a small-particle bottom layer is usually observed according to the literature. In this work, a facile air-annealing pretreatment is conducted for a Cu2ZnSnS4 precursor thin film prior to selenization, which can lead to sodium diffusion into the CZTS precursor thin film and surface oxidization of the CZTS thin film. Our experimental results revealed that the Na prediffusion and the surface oxidation of the CZTS precursor thin film can significantly promote the crystal growth of the CZTSSe thin film, which can completely remove the small-particle bottom layer and form a large-grain-spanned CZTSSe thin film. As a result, a photoelectric conversion efficiency of 9.80% was achieved by this method.
研究领域:
材料科学
·
太阳能电池技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）