JOURNAL OF MATERIALS CHEMISTRY
·
2012
·Vol. 22
·期 15
·7502-7506
·
IF 5.968
Hechun Jiang,Pengcheng Dai,Zhenyu Feng,Weiliu Fan,Jinhua Zhan
Cu2ZnSnS4 (CZTS) is acknowledged as an alternative to traditional p-type semiconductors. Traditionally obtained CZTS, however, is mostly kesterite or stannite phase, which features a tetragonal crystal cell. Herein, novel orthorhombic CZTS has been synthesized via an ethylenediamine-assisted hydrothermal method. Ethylenediamine plays an important part in the construction of the orthorhombic phase. Kesterite CZTS was also obtained in an ultrapure water system without ethylenediamine. The structure was confirmed by XRD, XPS and HRTEM. The band gap of the orthorhombic CZTS is about 1.45 eV, which approaches the optimum value for solar photoelectric conversion. What's more, we found that this orthorhombic CZTS is metastable. After annealing at 500 °C, a phase transformation from the orthorhombic structure to the tetragonal kesterite structure was achieved. The photoelectric response was also characterised, which demonstrated its potential for application in photovoltaic devices.
研究领域:
材料科学
·
光伏技术
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2015
·
IF 6.723
Fangzhou Zhou,Fangqin Zeng,Xu Liu,Fangyang Liu,Ning Song,Chang Yan,Aobo Pu,Jongsung Park,Kaiwen Sun,Xiaojing Hao
Back contact modification plays an important role in improving energy conversion efficiency of Cu2ZnSnS4 (CZTS) thin film solar cells. In this paper, an ultrathin carbon layer is introduced on molybdenum (Mo)-coated soda lime glass (SLG) prior to the deposition of CZTS precursor to improve the back contact and therefore enhance CZTS solar cell efficiency. By introducing this layer, the short circuit current (Jsc) and device conversion efficiency increase for both nonvacuum (sol–gel) and vacuum (sputtering) methods. Specifically, for the sol–gel based process, Jsc increases from 13.60 to 16.96 mA/cm2 and efficiency from 4.47% to 5.52%, while for the sputtering based process, Jsc increases from 17.50 to 20.50 mA/cm2 and efficiency from 4.10% to 5.20%. Furthermore, introduction of this layer does not lead to any deterioration of either open circuit voltage (Voc) or fill factor (FF).
研究领域:
材料科学
·
太阳能技术
·
薄膜电池研究
✓ 已验证
DOI
PubMed
高影响因子
RSC Advances
·
2014
·Vol. 4
·期 53
·27805-27810
·
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
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2015
·Vol. 26
·期 3
·1932-1939
·
IF 1.569
Gu Ening,Yan Chang,Liu Fangyang,Liu Yike,Su Zhenghua,Zhang Kun,Chen Zhiwei,Li Jie,Liu Yexiang
Earth abundant Cu 2 ZnSnS 4 (CZTS) has triggered great attention in the field of low cost thin film solar cells. High-quality CZTS nanocrystals were synthesized by a facile solution method, with an average particle diameter about 12 nm and a direct band gap of 1.49 eV. And these nanocrystals were readily dispersed to form a colloidal ink, which was then used to prepare thin films by doctor blading approach. Effects of sulfurization temperature on those films’ composition, morphology and phase were studied. The obtained thin film, annealed under flow S/Ar atmosphere at 550 °C for 30 min, shows a dense smooth surface, a slightly Cu-poor and Zn-rich composition and the kesterite CZTS structure. Besides, this 550 °C annealed CZTS film was then fabricated into full photovoltaic device and a power conversion efficiency of 2.29 % has been achieved. Directions for further improvements have also been discussed and proposed.
研究领域:
材料科学
·
能源科学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Shuaifei Mao,Jiantong Ge,Lingling Zhang,Yannan Dai,Sheng Jiang,Yafei Chen,Chunli Jiang,Chunhua Luo,Bobo Tian,Hechun Lin,Hui Peng,Chun-Gang Duan
The advent of artificial photoelectric synapse devices has attracted considerable attention due to their potential to reshape the landscape of neuromorphic computing. A critical challenge impeding their wider application is the typically short image retention time these devices exhibit. In this study, a strategy is developed to address this obstacle by combining the formation of heterojunction and defect-trapping effects. A Cu 2 ZnSnS 4 (CZTS) film is prepared via low-temperature annealing to form a type II heterojunction with ZnO . The two-terminal device based on this heterojunction shows excellent synaptic functionality. The wide absorption of CZTS film in the visible light spectrum enables the device to achieve a broadband response, which is crucial for realizing the simulation of Pavlov’s associative memory. Its utility in encoding encrypted information is demonstrated through the capability to simulate Morse code. Most importantly, the device exhibits image memory for periods exceeding 1100 s, highlighting its exceptional performance in visual memory retention. These results contribute to the development of CZTS-based photoelectric synaptic devices with broad response characteristics and non-volatile memory capabilities.
研究领域:
材料科学
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神经形态计算
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光电技术
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2018
·
IF 4.229
Meng Yuan,Wen-Hui Zhou,Dong-Xing Kou,Zheng-Ji Zhou,Yue-Na Meng,Si-Xin Wu
Design and preparation of high performance photocatalysts are always the keys for photocatalytic hydrogen production by using green and unlimited solar energy. In this work, we present the synthesis of Cu 2 ZnSnS 4 (CZTS) decorated CdS nanorods and their use for visible-light-driven photocatalytic hydrogen production. The as-synthesized CZTS decorated CdS nanorods exhibit much higher visible-light-driven photocatalytic hydrogen production performance than that of individual CdS nanorods and individual CZTS nanoparticles . Specifically, the hydrogen production rate of representative CZTS decorated CdS nanorods was 48-times and 165-times higher than that of individual CdS nanorods and individual CZTS nanoparticles. The enhanced photocatalytic hydrogen production performance may be contributed by the p-n heterojunction as well as the synergistic effect between CdS nanorods and CZTS particles. The present work not only reported new low-cost and highly efficient photocatalysts for visible-light-driven photocatalytic hydrogen production, but also provided new method for the design and preparation of high performance visible-light-driven heterostructured photocatalysts for photocatalytic hydrogen production.
研究领域:
材料科学
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能源科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2024
·
IF 8.1
Adil Raza,Azhar Ali Haidry,Zhengjun Yao,Talha Amin,Muhammad Ahsan,Razan A. Alshgari,Saikh Mohammad
It is shown that replacing non-noble metals with noble metals in photocatalytic water splitting is pivotal for increased and sustained hydrogen production. However, the challenge persists in designing and developing a cost-effective, highly active catalyst with effective carrier separation and providing sufficient H + reduction sites to enhance photocatalytic H 2 evolution efficiency. Herein, a series of S-scheme Cu 2 ZnSnS 4 /g-C 3 N 4 (CZTS/CN) heterojunction composites were prepared via the hydrothermal method, followed by comprehensive characterizations for in-depth investigation. The TEM image exhibits a clear interface, showing the heterojunction formation between CZTS and CN nanosheets. The results show that incorporating CZTS cocatalyst significantly improves CN photocatalytic hydrogen evolution reaction (HER) and its performance is notably influenced by CZTS to CN mass ratio. Among CZTS/CN heterojunction composites, the 5% CZTS/CN heterojunction composite exhibited a significantly improved HER of 243.64 μmol g −1 h −1 , which is 29.4 and 7.08 folds superior as compared to CN (8.29 μmol g −1 h −1 ) and CZTS (34.42 μmol g −1 h −1 ), respectively. The mechanism study revealed that the excellent superior H 2 evolution performance resulted from the established internal electric field (IEF) in p-n heterojunction, which expedites the efficient separation and migration of photoinduced carriers coupled with the distinctive flower-like configuration of CZTS offering a substantial surface area and enough active reduction sites for photocatalysis process. This work presents a rational design and an inexpensive and efficient heterojunction photocatalysis system suitable for diverse applications.
研究领域:
材料科学
·
能源化学
✓ 已验证
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2018
·Vol. 28
·期 14
·1703369
·
IF 13.325
Youchen Gu,Heping Shen,Chen Ye,Xuezeng Dai,Qian Cui,Jianbao Li,Feng Hao,Xiaojing Hao,Hong Lin
The thin-film photovoltaic material Cu 2 ZnSnS 4 (CZTS) has drawn worldwide attention in recent years due to its earth-abundant, nontoxic element constitution, and remarkable photovoltaic performance. Although state-of-the-art power conversion efficiency is achieved by hydrazine-based methods, effort to fabricate such devices in a high throughput, environmental-friendly way is still highlydesired. Here a hydrazine-free all-solution-processed CZTS solar cell with Na 2 S self-depleted back contact modification layer for the first time is demonstrated, using a ball-milled CZTS as light absorber, low-temperature solution-processed ZnO electron-transport layer as well as silver-nanowire transparent electrode. The inserting of Na 2 S self-depleted layer is proven to effectively stabilize the CZTS/Mo interface by eliminating a detrimental phase segregation reaction between CZTS and Mo-coated soda lime glass, thus leading to a better crystallinity of CZTS light absorbing layer, enhanced carrier transportation at CZTS/Mo interface as well as a smaller series resistance. Furthermore, the self-depletion feature of the Na 2 S modification layer also averts hole-transportation barrier within the devices. The results show the vital importance of interfacial engineering for these CZST devices and the Na 2 S interface layer can be extended to other optoelectronic devices using Mo contact.
研究领域:
材料科学
·
光伏技术
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2021
·
IF 7.46
Yuting Wang,Xiaoqiong Fu,Tianqi Wang,Feng Li,Dan Li,Ying Yang,Xiangting Dong
In this work, a Cu 2 ZnSnS 4 (CZTS)-based gas sensor incorporated by polyoxometalate(POMs) electron acceptor were synthesized by hydrothermal method . For the first time we investigated on the application of CZTS in NO 2 sensor and the influence of POMs incorporating on gas sensing performances of CZTS sensor. As a result, the gas sensing response could be remarkably improved to 6.12 times by incorporating POMs compared with pure CZTS. This is mainly attributed to introducing POMs into CZTS could reduce electron-hole recombination and facilitate electrons transfer. The research results exhibit the highest gas sensing response of CZTS-based gas sensor up to now. This research reveals a new idea for developing high-performance gas sensors based on CZTS by introducing POMs.
研究领域:
材料科学
·
传感器技术
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
·
2021
·
IF 3.927
Xiao Tian,Jiaxiong Xu
The reported Ag and Mn co-doped Cu 2 ZnSnS 4 thin film has better properties than single-doped Cu 2 ZnSnS 4 . However, the role of Mn in co-doped Cu 2 ZnSnS 4 thin film is still unclear. In this paper, Ag and Mn co-doped Cu 2 ZnSnS 4 thin films with different Mn amounts were prepared by sol-gel method. The crystal phases, morphologies, element compositions, and optical properties of co-doped Cu 2 ZnSnS 4 thin films were characterized to investigate the role of Mn doping. Compared with Ag single-doped Cu 2 ZnSnS 4 thin film, after the incorporation of Mn into Ag-doped Cu 2 ZnSnS 4 , the crystallinity of Cu 2 ZnSnS 4 improves and the micro-strain and dislocation density in the crystal reduce. The valence states of Cu, Zn, Sn, S, Ag, and Mn in co-doped thin film are +1, +2, +4, −2, +1, and +2, respectively. Mn doping can make the grains on the thin film surface enlarge. The MoS 2 interface layer between Cu 2 ZnSnS 4 and Mo becomes thinner and the Urbach energy of Cu 2 ZnSnS 4 decreases after Mn doping. Therefore, Mn in the co-doped Cu 2 ZnSnS 4 thin films shows beneficial effects of enhanced structural, morphological, and optical properties of the films.
研究领域:
材料科学
·
光伏技术
✓ 已验证
DOI
高影响因子
SEMICONDUCTOR SCIENCE AND TECHNOLOGY
·
2021
·Vol. 36
·期 9
·095021
·
IF 2.352
Xiaomin Huo,Honglie Shen,Xia Hu,Zhangchen Hou,Jaffer Saddique
A novel nanomaterial formed by a Cu2ZnSnS4 (CZTS)/CeO2 heterojunction with excellent electrochemical sensing for ammonia nitrogen was prepared by a microwave irradiation method combined with a hydrothermal method. The properties of the CZTS/CeO2 heterojunction were investigated by a series of characterizations such as Raman spectra, x-ray diffraction, scanning electron microscopy, thermogravimetric analysis, specific surface area (SSA), temperature-programmed desorption of ammonia and UV–vis spectroscopy. Nickel foam was used as a conductive frame electrode in order to enhance the sensitivity of the sensor along with the electrical conductivity, permeability and SSA. It is revealed by electrochemical measurements that the ammonia nitrogen oxidation reaction occurring in the sensing electrode of the CZTS/CeO2 heterojunction demonstrated regulation of Ip (mA) = 6.4 × 10−3C (mM)+ 0.1527 (R2= 0.9987) in a wide concentration range of 0–380.0 mM with a low detection of 6.0 μM according to the signal-to-noise ratio (S/N= 2). The CZTS/CeO2 heterojunction is expected to become a new candidate semiconductor nanomaterial for the electrochemical detection of ammonia nitrogen in an aqueous solution.
研究领域:
环境科学
·
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
·
2022
·
IF 4.383
Adil Raza,Azhar Ali Haidry,Jaffer Saddique
Efficient solar to chemical energy conversion by promising semiconductor-based photocatalysis has gained huge interest due to being a potential solution for environmental remediation and energy problems. Though, the inadequate photogenerated charge separation practically limits the photocatalytic efficiency. Herein, mesoporous g-C 3 N 4 (CN) nanosheets coupled Cu 2 ZnSnS 4 (CZTS) hybrid composite as visible-light-driven photocatalyst is synthesized by a facile in situ hydrothermal self-assembly method and investigated for CO 2 photocatalytic reduction. The hybrid composite shows a slight red shift to the visible region with enhanced optical absorption . Under visible light irradiation, experimental results exhibit CZTS-CN hybrid composite has CO/CH 4 yield rates of 12.01/3.76 μmol g −1 after 5h, which are 1.54/1.41 times higher in comparison with bare CN. The heterojunction formation between CZTS and g-C 3 N 4 is restraining the electron-hole recombination and improves the photocatalytic performance. Finally, acceptable underlying mechanisms for CO 2 photocatalytic reduction over CZTS-CN hybrid composite are proposed. This work may inspire readers to provide sufficient guidance to design high-performance photocatalysts.
研究领域:
材料科学
·
环境科学
·
能源科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）