JOURNAL OF ALLOYS AND COMPOUNDS
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2016
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IF 3.014
Fan Yang,Ruixin Ma,Weishuang Zhao,Xiaoyong Zhang,Xiang Li
CZTS has been considered to be a perfect suitable replacement for CuInGaSe 2 (CIGS) which contains the rare elements. This work developed a novel route to fabricate CZTS absorber films based on the integration of non-vacuum and vacuum techniques. This was illustrated by first synthesizing CZTS powder with the method of solid-phase synthesis. Then three different compound targets made of CZTS precursors and pure CZTS powder were utilized to fabricate CZTS absorber films using Radio Frequency (RF) sputtering, followed by a sulfurization process. All synthesized samples were analyzed with respect to their crystal structure, vibrational property, morphology and chemical composition. The photoelectrical properties investigation of the sulfurized absorber films by UV-VIS spectrophotometer and Hall effect measurement can well meet the requirements for potential application in thin film solar cells, demonstrating this approach had great potential for CZTS solar cell production.
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
RSC Advances
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2014
·Vol. 4
·期 53
·27805-27810
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IF 3.708
Jing Wang,Peng Zhang,Xuefeng Song,Lian Gao
As a low cost and environment-friendly solar absorber material, Cu2ZnSnS4 (CZTS) has aroused great interest for both photovoltaic and photocatalytic applications. The development of low temperature and green chemical route for the preparation of this quaternary sulfide compound still remains a challenge. In the present study, we present a surfactant-free hydrothermal method for the preparation of CZTS nanocrystals with an average size of 12 nm and photoactivity in hydrogen production. Ammonia was proposed to play a key role in confining the particle sizes. The properties of the CZTS nanoparticles were characterized using XRD, Raman, XPS, TEM, and UV-vis absorption. The photocatalytic properties of the as-synthesized CZTS nanoparticles were tested both in thin films and in slurry systems.
研究领域:
材料科学
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能源科学
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环境科学
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DOI
高影响因子
MATERIALS TECHNOLOGY
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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
ACS Sustainable Chemistry & Engineering
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2015
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IF 4.642
Shanlong Chen,Aichun Xu,Jie Tao,Haijun Tao,Yizhou Shen,Lumin Zhu,Jiajia Jiang,Tao Wang,Lei Pan
A novel in-situ and green method with the combination of TiCl4 pretreatment and solvothermal growth was proposed to prepare the Pt-free Cu2ZnSnS4 (CZTS) counter electrodes (CEs) on FTO substrate. It was found that TiCl4 pretreatment toward the substrates was crucial to a high quality and high efficiency CZTS film, which consists of nanosheet and nanoparticle structure. The highly crystallized nanosheets were assembled from kesterite structure CZTS nanocrystals, with an average diameter of 10–30 nm. The detailed morphology, crystal structure, and composition of the CZTS nanostructures were characterized by SEM, TEM, SAED, XRD, Raman, and EDS analysis, respectively. Electrocatalytic abilities of the films toward I–/I3– were verified through cyclic voltammograms (CV), electrochemical impedance spectroscopy (EIS), and Tafel polarization measurements. A maximum power conversion efficiency of 5.65% was achieved for a cell with CZTS 3, under 100 mW/cm2, which was higher than that of a cell with a commercial Pt counter electrode (4.96%). This high efficiency was mainly attributed to the good bonding strength between CZTS films and FTO substrate (RS = 4.41 Ω cm2), and higher electron-transfer process at the electrolyte/CE interface (high JSC), along with superior electrochemical catalytic ability (RCt = 2.40 Ω cm2). The in-situ prepared CZTS CEs are proven to be suitable for high efficiency Pt-free dye-sensitized solar cells (DSSCs), leading to significantly decrease of the cell cost and simplification of preparation process.
研究领域:
材料科学
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能源科学
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纳米技术
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DOI
高影响因子
Small
·
2024
·Vol. 20
·期 48
·2405528
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IF 13
Lunyao Pan,Xiankan Zeng,Yuanxiao Qu,Maolin Mu,Shiyu Yang,Yongjian Chen,Chenglong Li,Linzhu Dai,Li Tao,Hongqiang Xin,Wen Li,Weiqing Yang
Cu 2 ZnSnS 4 (CZTS) is strong candidate for hole transport in perovskite light emitting diodes (PeLEDs) due to their cost-effectiveness, deep highest occupied molecular orbital (HOMO), and high hole mobility. However, its inherent polymetallic ions usually deteriorate the quality of the perovskite emission layer (EML) affecting device performance. In this study, a bidirectional anchoring strategy is proposed by adding 15-crown-5 ether (15C5) into CZTS hole transport layer (HTL) to suppress the reaction between HTL and EML. The 15C5 molecule interacts with Cu + , Zn 2+ and Sn 2+ cations forming host–guest complexes to impede their migration, which is elucidated by density functional theory calculations. Additionally, 15C5 can neutralize lead (Pb) defects by the abundant oxygen (O) and high electronegative cavities to reduce the nonradiative recombination of FAPbBr 3 film. This bidirectional anchoring strategy effectively improves hole charge transport efficiency and suppresses nonradiative recombination at the HTL/EML interface. As a result, the optimized PeLEDs present a 3.5 times peak external quantum efficiency (EQE) from 3.12% to 11.08% and the maximum luminance ( L max ) increased from 24495 to 50584 cd m −2 . These findings offer innovative insights into addressing the metal ion migration issue commonly observed in inorganic HTLs.
研究领域:
材料科学
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光电子学
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半导体物理
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DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）