JOURNAL OF NANOPARTICLE RESEARCH
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2013
·Vol. 15
·期 9
·1-7
·
IF 2.175
Zong Kai,Lu SiHeng,Wang Hao,Sun YuXiu,Liu JingBing,Yan Hui
Cu 2 ZnSnSe 4 quantum dots (QDs) with controllable sizes have been synthesized via a hot-injection method. The diameters of the QDs range from 3.2 to 10.1 nm with the tunable band gap from 1.27 to 1.54 eV by adjusting the reaction temperatures from 180 to 240 °C. Structural and Raman scattering data confirm that Cu 2 ZnSnSe 4 is obtained without other secondary phases. The band gaps of the QDs with diameters less than 4.6 nm show an obvious blue shift to higher energy due to quantum confinement effect. It indicates that the Cu 2 ZnSnSe 4 QDs can be a potential candidate for quantum-dot-sensitized solar cells in the future.
研究领域:
材料科学
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2020
·Vol. 9
·期 2
·1006-1013
·
IF 11.301
Zhou Li,Weihui Zhang,Bingchuan Gu,Chenxi Zhao,Bangjiao Ye,Chong Xiao,Yi Xie
Low thermal conductivity is commonly seen in amorphous or disordered systems, in which electrical conductivity is also very low, bringing considerable obstacles to the development of high-performance thermoelectric materials. Present study highlights the vacancy cluster-induced local disordered structure in Cu2ZnSnSe4 for the simultaneous achievement of low thermal conductivity and high electrical conductivity, thereby significantly enhancing its thermoelectric property. Comprehensive evidences from positron annihilation and HRTEM characterizations indicated that the vacancies in cation-deficient (VCu, VZn, and VSn) samples existed as vacancy clusters containing both cation vacancies and intrinsic Se vacancies, which induced the formation of localized disorderly oriented domains. These cation deficiencies contributed to the improved electrical conductivity and power factor of the corresponding Cu2(1−x)Zn1−ySn1−zSe4 samples via an increase in the hole carrier concentration. Moreover, the induced local disordering contributed to further reduced thermal conductivity via stronger phonon scattering. As a result, enhanced ZT performance was achieved in all cation deficient samples. Among them, Sn-deficient Cu2ZnSnSe4 obtained the highest ZT value of 0.44 at 750 K, which was two times larger than that of pristine sample (ZT = 0.14 at 750 K). The cation–anion vacancy cluster and local disordered structure elucidated in the present work open up a new avenue to tackle the entanglement of thermoelectric parameters by proper vacancy modulation.
研究领域:
材料科学
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物理学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2014
·
IF 5.9
Yanchun Yang,Gang Wang,Wangen Zhao,Qingwen Tian,Lijian Huang,Daocheng Pan
Solution deposition approaches play an important role in reducing the manufacturing cost of Cu2ZnSnSe4 (CZTSe) thin film solar cells. Here, we present a novel precursor-based solution approach to fabricate highly efficient CZTSe solar cells. In this approach, low-cost elemental Cu, Zn, Sn, and Se powders were simultaneously dissolved in the solution of thioglycolic acid and ethanolamine, forming a homogeneous CZTSe precursor solution to deposit CZTSe nanocrystal thin films. Based on high-quality CZTSe absorber layer, pure selenide CZTSe solar cell with a photoelectric conversion efficiency of 8.02% has been achieved without antireflection coating.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Fangfang Wu,Xiaohui Tan,Wuzhi Zhu,Xiuxun Han
At present, most reported solution-processed highly efficient Cu 2 ZnSn(S,Se) 4 (CZTSSe) solar cells are prepared from precursor solutions with sulfur-containing complexing agents. However, the organic solutions with sulfur-containing groups are generally toxic and always produce harmful gases during pyrolysis. From the view of environment protection and process safety, preparing CZTSSe from the oxide precursor is more favorable for the application and development of CZTSSe photovoltaic technology compared with the sulfide precursor route. In this work, we developed a sulfur-free solution method for preparing CZTSe solar cells based on a monoethanolamine-ethanol blend wherein the ethanolamine serves as both complexing agent and reducing agent. The precursor thin film prepared is mainly composed of amorphous oxides and a small amount of copper. We found that the content of ethanolamine not only affects the formation of copper-rich phase on the surface of the precursor film, but also affects the formation of zinc-rich phase on the surface of the absorber layer. By systematically investigating the effects of ethanolamine content on precursors, absorbers and solar cells, an oxide precursor route to preparing CZTSe solar cells based on solution with low ethanolamine content and two-step drying process was successfully proposed.
研究领域:
材料科学
·
太阳能技术
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED MATERIALS
·
2012
·Vol. 24
·期 46
·6158-6163
·
IF 13.877
Feng-Jia Fan,Yi-Xiu Wang,Xiao-Jing Liu,Liang Wu,Shu-Hong Yu
Graphical Over 10 g of non-stoichiometric Cu 2 ZnSnSe 4 colloidal nanocrystals for thermoelectric applications are prepared after one single reaction. The obtained pellet made from the colloidal nanocrystals shows a peak ZT value of 0.44 at 450 °C, which is similar to those of state-of-the-art Cu 2 ZnSnSe 4 -based bulk materials at the same temperature.
研究领域:
材料科学
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纳米技术
·
能源材料
✓ 已验证
产品关联
DOI
PubMed
高影响因子
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
·
2016
·Vol. 213
·期 5
·1324-1328
·
IF 1.648
Yongzheng Zhang,Yuxiu Sun,Hao Wang,Hui Yan
Cu 2 ZnSnSe 4 (CZTSe) solar cell with a facile superstrate structure of carbon/CZTSe/CdS/ITO was fabricated entirely by non-vacuum processes. The influence of selenization temperature on the composition of CZTSe layer was briefly investigated. Compared with current superstrate-type CZTS(e) solar cells, the present CZTSe superstrate solar cell exhibited a higher power conversion efficiency of 2.44%.
研究领域:
材料科学
·
光伏技术
·
无机半导体
·
能源材料
·
薄膜器件
✓ 已验证
DOI
高影响因子
Nanoscale Research Letters
·
2018
·Vol. 13
·期 1
·1-5
·
IF 3.125
Han Zhenzhen,Li Nan,Shi Aihua,Wang Haohua,Ma Feng,Lv Yi,Wu Rongqian
A SeO 2 ethanol solution as the facile precursor has been used for the preparation of quaternary Cu 2 ZnSnSe 4 (CZTSe) nanoplates. Monodispersed single-phase CZTSe nanoplates have been prepared successfully by a facile one-pot thermal chemical method. The as-prepared CZTSe nanoplates show uniform morphology with a bandgap of ~ 1.4 eV. As a proof of concept, the CZTSe nanoplates have been used as a visible-light-driven photocatalyst for Rhodamine B dye degradation and show high photocatalytic activity and stability. The excellent dye removal is mainly ascribed to the efficient light utilization of CZTSe nanoplates.
研究领域:
材料科学
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环境科学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF POWER SOURCES
·
2016
·
IF 6.333
Jinlian Bi,Liyong Yao,Jianping Ao,Shoushuai Gao,Guozhong Sun,Qing He,Zhiqiang Zhou,Yun Sun,Yi Zhang
The issues of rough surface morphology and the incorporated additives of the electro-deposited Cu layers, which exists in electrodeposition-based processes, is one of the major obstacles to improve the efficiency of Cu(In,Ga)Se 2 (CIGSe) and Cu 2 ZnSnSe 4 (CZTSe) solar cells. In this study, the pulse current electro-deposition method is employed to deposit smooth Cu film on Mo substrate in CuSO 4 solution without any additives. Grain size of the deposited Cu film is decreased by high cathode polarization successfully. And the concentration polarization , which results from high pulse current density, is controlled successfully by adjusting the pulse frequency. Flat Cu film with smooth surface and compact structure is deposited as pulse current density @ 62.5 mA cm −2 , pulse frequency @100,000 Hz, and duty cycle @ 25%. CIGSe and CZTSe absorber films with flat surface and uniform elemental distribution are prepared by selenizing the stacking metal layers electro-deposited by pulse current method. Finally, the CIGSe and CZTSe solar cells with conversion efficiency of 10.39% and 7.83% respectively are fabricated based on the smooth Cu films, which are better than the solar cells fabricated by the rough Cu film deposited by direct current electro-deposition method.
研究领域:
材料科学
·
可再生能源
·
电化学
✓ 已验证
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2016
·
IF 8.328
Yawei Yang,Wenxiu Que,Xinyu Zhang,Xingtian Yin,Yonglei Xing,Meidan Que,Hongyang Zhao,Yaping Du
A chloroform-assistant Se dissolution in oleylamine without trioctylphosphine and alkylthiol as the green precursor was used for facile and robust synthesis of quaternary selenide nanocrystals. The S 2− modified hydrophilic Cu 2 ZnSnS 4 and Cu 2 ZnSnSe 4 nanocrystals were first prepared by a one-pot thermal decomposition route, followed by a bi-phase hydrophilic treatment process. As a proof of concept, the as-obtained hydrophilic nanocrystals were hybridized with ZnO microspheres as photosensitizers to achieve visible light-driven photocatalytic application; on the other hand, hybridized with NaYF 4 : Yb, Tm microplates to achieve near-infrared light-driven photocatalytic application. These photosensitized hybrids as photocatalysts expanded the light absorption from ultraviolet to visible even near-infrared region, which showed excellent photocatalytic Rhodamine B degradation under visible and near-infrared irradiation compared to pure ZnO and NaYF 4 : Yb, Tm, respectively. Therefore, these hydrophilic Cu 2 ZnSnS 4 and Cu 2 ZnSnSe 4 nanocrystals are proved as efficient photocatalytic sensitizers due to the efficient utilization of the visible light and emissions upconverted from near-infrared light.
研究领域:
材料科学
·
化学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Micro & Nano Letters
·
2020
·Vol. 15
·期 13
·887-891
·
IF 0.975
Ying Liu,Xiaowei Xu,Ke Liu,Huihong Liu
A truly simple, reproducible, and environmentally friendly non-vacuum synthesis method for synthesising of carbon-free Cu 2 ZnSnSe 4 (CZTSe) absorber layer has been presented. The stannite CZTSe nanoparticles with an average size of about 20 nm distributions were fabricated by an ambient mechanical milling procedure using Cu 2 Se, Zn, Sn, elemental selenium powders as raw materials and non-toxic ethanol as solvent. The compact CZTSe thin films were formed via an annealing treatment under Ar/Se atmosphere using rapid thermal processing. The optical properties of the obtained CZTSe thin films are the absorption coefficient ( α ) exceeding 10 4 cm −1 and E g of 0.91 eV. The electrical properties of the CZTSe thin films indicate p -type semiconductor behaviour. The photovoltaic properties of this solar cell are power conversion efficiency of 0.18%.
研究领域:
材料科学
·
太阳能技术
✓ 已验证
DOI
高影响因子
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