Coatings
·
2020
·Vol. 10
·期 4
·399
·
IF 2.436
Qiannan Ye,Xu Zhang,Dong Guo,Wei Xu,Honglong Ning,Tian Qiu,Jinxiong Li,Danqing Hou,Rihui Yao,Junbiao Peng
High-quality SnO2:Si films and SnO2:10 at.% Ga films were prepared by the solution method. The roughness of films is below 1.08 nm, and possess exceptional transparency (>75%) and decent semiconductor properties. Based on this, the SnO2:Si/SnO2: Ga homojunctions with different Si doping concentrations were prepared. It is found that the conductivity of the SnO2:Si thin film gradually increases, and the rectification characteristics of the homojunction are optimized with increasing Si doping content. The SnO2:15 at.% Si/SnO2:10 at.% Ga homogeneous junction has the best performance, the turn-on voltage is as low as 5.6 V, and it also exhibits good unidirectional conductivity. The photoresponse of the SnO2:15 at.% Si/SnO2:10 at.% Ga homojunction under the lights of red, yellow, and purple was explored respectively. The result shows that the device responds strongly to purple light. Compared with the test results in the dark environment, the device current increases by two orders, which is expected to be applied in the field of near-ultraviolet detection.Keywords:solution method;SnO2;homojunction;highly transparent;photoresponse
研究领域:
材料科学
·
光电学
·
半导体物理
✓ 已验证
DOI
高影响因子
MATERIALS LETTERS
·
2014
·
IF 2.269
Fuyou Liao,Lili Zhao,Chunxue Zhai,Zhiyong Zhang,Xiaolei Ma
SrCO 3 particles were prepared at 450–600 °C by a simple solution method. The phase structure, morphologies and photoluminescence (PL) properties of particles were investigated. All of the as-synthesized samples are orthorhombic SrCO 3 phase. SrCO 3 particles are composed of fibers aggregates and have layered morphologies. When excited by an appropriate wavelength, a broad emission band can be observed in the samples ranging from ultraviolet to red light region. The PL properties of samples were significantly affected by the fibers. SrCO 3 particles with fine and short fibers structure have excellent PL properties. In our experiment, SrCO 3 particles synthesized at 450 °C exhibit the strongest PL properties.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
Crystals
·
2022
·Vol. 12
·期 4
·558
·
IF 2.67
Chengcheng Li,Zeliang Gao,Zhongjun Zhai,Shuai Ye,Youxuan Sun
A Cr4+-doped TiTe3O8crystal with dimensions up to 21 mm × 21 mm × 11 mm was grown successfully by the top-seeded solution growth method. A high-resolution X-ray diffraction experiment showed that the full width at half-maximum of the rocking curve was 41.90″. Energy-dispersive spectrometry (EDS) and X-ray fluorescence spectroscopy (XRF) proved that Cr4+ions have been doped into the TiTe3O8crystal with molar percentage of 4.9%. The Cr:TiTe3O8crystal exhibited an absorption range from 995 to 1565 nm, which is suitable for passive Q switch at 1064 nm. Then, a passive Q-switching solid-state laser operating at 1064 nm was realized using a Cr:TiTe3O8crystal as the saturable absorber. The maximum laser pulse energy is calculated to be 0.7 μJ, and the maximum peak power reaches 0.7 W.Keywords:Cr:TiTe3O8;passive Q-switching;top seed solution method
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
Nanomaterials
·
2019
·Vol. 9
·期 3
·388
·
IF 4.034
Han Wu,Zhong Ma,Zixia Lin,Haizeng Song,Shancheng Yan,Yi Shi
Ammonia (NH3) is a harmful gas contaminant that is part of the nitrogen cycle in our daily lives. Therefore, highly sensitive ammonia sensors are important for environmental protection and human health. However, it is difficult to detect low concentrations of ammonia (≤50 ppm) using conventional means at room temperature. Tin monoxide (SnO), a member of IV–VI metal monoxides, has attracted much attention due to its low cost, environmental-friendly nature, and higher stability compared with other non-oxide ammonia sensing material like alkaline metal or polymer, which made this material an ideal alternative for ammonia sensor applications. In this work, we fabricated high-sensitive ammonia sensors based on self-assembly SnO nanoshells via a solution method and annealing under 300 °C for 1 h. The as fabricated sensors exhibited the response of 313%, 874%, 2757%, 3116%, and 3757% (∆G/G) under ammonia concentration of 5 ppm, 20 ppm, 50 ppm, 100 ppm, and 200 ppm, respectively. The structure of the nanoshells, which have curved shells that provide shelters for the core and also possess a large surface area, is able to absorb more ammonia molecules, leading to further improvements in the sensitivity. Further, the SnO nanoshells have higher oxygen vacancy densities compared with other metal oxide ammonia sensing materials, enabling it to have higher performance. Additionally, the selectivity of ammonia sensors is also outstanding. We hope this work will provide a reference for the study of similar structures and applications of IV–VI metal monoxides in the gas sensor field.Keywords:tin monoxide;nanoshell;ammonia sensor;solution method
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Advanced Electronic Materials
·
2020
·Vol. 6
·期 5
·2000035
·
IF 6.593
Ruiqi Guo,Linxing Zhang,Jie Meng,Aqiang Liu,Jifeng Yuan,Kaibo Zheng,Jianjun Tian
Compared to analogous bulk materials, colloidal nanocrystals have presented a powerful platform for building up electronic devices on the nano/micrometer scale and flexible portable electronic apparatus with the benefits of solution-based processing approach at room temperature. Herein, memristors based on CuInSe 2 (CISe) colloidal nanocrystals prepared using a solution-based process at room temperature are constructed. The memristors exhibit obvious bipolar resistive switching performance with a high–low resistance ratio larger than 5.7 and a steady retention time over 10 4 s. This is attributed to the copper ion redox reaction and the migration of these ions under an applied electric field. When the SET voltage is reached, the ions are separated from one of the electrodes, and the memristor changes from a low-resistance state (LRS) to a high-resistance state (HRS). Conversely, when the voltage reaches the RESET voltage, the memristor switches from a HRS to a LRS. In addition, the flexible memristor can be fabricated by spincoating nanocrystal solution onto polyethylene terephthalate (PET) at room temperature, showing excellent reproducibility of the performance including 100 times of continuous operation, 10 4 s of reproducible reading, 600 times of antifatigue testing, and thermal stability up to 95 °C. The flexible devices demonstrate promising applications for portable electronic devices.
研究领域:
材料科学
·
纳米技术
·
电子工程
✓ 已验证
产品关联
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
Advanced Optical Materials
·
2020
·Vol. 8
·期 15
·2000215
·
IF 8.286
Chandrasekar Perumal Veeramalai,Shengyi Yang,Ruonan Zhi,Muhammad Sulaman,Muhammad Imran Saleem,Yanyan Cui,Yi Tang,Yurong Jiang,Libin Tang,Bingsuo Zou
In general, the fabrication of high-performance, self-powered broadband photodetectors based on traditional semiconducting thin films is tedious and costly. Here, in this paper a high-performance, solution-processed, and self-powered CH 3 NH 3 PbI 3 (MAPbI 3 ) nanocrystal based photodetector ITO/MAPbI 3 /Ag is presented, and it shows broadband photoresponse from the visible to the near-infrared wavelength region. The pronounced enhanced performance of the photodetector is due to taking the advantage of the built-in electric field induced by the work function difference of two electrodes. The optimized photodetector shows a responsivity of 4.9 and 1.42 A W −1 with a specific detectivity of 7.6 × 10 13 and 1.77 × 10 13 Jones under 19 µW cm −2 white light illumination and 26 µW cm −2 808 nm illumination at zero bias, respectively. Therefore, such a concept of simple device geometry and feasible technique will open up a new and promising avenue for the fabrication of self-powered photodetectors and the development of imaging devices.
研究领域:
材料科学
·
光电技术
✓ 已验证
产品关联
DOI
高影响因子
APPLIED OPTICS
·
2021
·Vol. 60
·期 28
·8896-8903
·
IF 1.98
Li Ren,Kunpeng Gao,Qiuhong Tan,Qiuhong Tan,Qiuhong Tan,Chen Qing,Qianjin Wang,Qianjin Wang,Peizhi Yang,Yingkai Liu,Yingkai Liu
All inorganic perovskite materials have drawn extensive attention, owing to their outstanding performance, facile solution-processed method, and potential applications in optoelectronic devices. However, uncontrollable morphology, high defect density, and instability of perovskites prepared via solution-processed method are the main challenges for their large-scale production and commercialization. Herein, we prepared large-scale ${\rm{CsPbB}}{{\rm{r}}_3}$ microwire arrays with highly ordered morphology and high crystalline quality by a template-assisted method. The photodetectors based on ${\rm{CsPbB}}{{\rm{r}}_3}$ microwire arrays exhibited remarkable on/off photocurrent ratio of ${9.02} \times {{1}}{{{0}}^3}$, high detectivity of ${1.59} \times {{1}}{{{0}}^{13}}$ Jones, high responsivity of 4.55 A/W, and fast response speed of 4.9/3 ms. More importantly, the photocurrent of the photodetectors hardly changed in air after being stored for two months, indicating remarkable stability. This study demonstrates that ${\rm{CsPbB}}{{\rm{r}}_3}$ microwire arrays provide the possibility for preparing large-scale and high-performance optoelectronic devices.
研究领域:
材料科学
·
光电子学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2023
·Vol. 11
·期 21
·11161-11169
·
IF 11.9
Qian Xiao,Dongxing Kou,Wenhui Zhou,Zhengji Zhou,Shengjie Yuan,Yafang Qi,Yuena Meng,Litao Han,Zhi Zheng,Sixin Wu
Advances in the development of kesterite Cu2ZnSn(S,Se)4 (CZTSSe) solar cells are urgently needed to further exploit their high-efficiency and low-cost nature. However, almost all the CZTSSe photovoltaics are presently fabricated using physically sputter-deposited i-ZnO as a window layer, which often results in self-doping with detrimental oxygen vacancies (VO) and zinc interstitial (Zni) defects, leading to ineffective charge collection and enlarged interface recombination losses. Herein, a solution-processed ZnO:Li nanoparticle (NP) window layer is demonstrated via the construction of a high-quality ZnO:Li/CdS/CZTSSe heterojunction to enhance the charge collection and minimize the interface recombination. The interstitial Li doping at a certain content significantly enhances the electrical conductivity of ZnO and quasi-Fermi level splitting at the p–n junction interface and reduces the concentration of VO and Zni defects. These electric benefits finally improve the conversion efficiency from 11.31% up to 12.60% with significant gains in FF and Voc. Our findings suggest that developing a ZnO:Li NP window layer is an effective method to manage electrical conductivity, contact resistance and interface band offset at the p–n junction, boosting the development of high-efficiency and low-cost kesterite solar cells to a higher level.
研究领域:
材料科学
·
光伏技术
·
半导体物理
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Jiahui Li,Jie Gao,Lida Jia,Lei Miao,Sijing Zhu,Zhongwei Zhang,Chengyan Liu,Xiaoyang Wang
The solution-process method can be easily realized without expensive and complicated equipment, which provides the possibility for cost-effective application of flexible thermoelectric films. Nonetheless, the reported output properties of solution-processed Cu 2 Se based films are not satisfactory due to the absence of effective compositional adjustment and optimal length. In this work, a series of solution-processed nylon-supported flexible Cu 2+x Se films have been fabricated. The excess Cu not only fills the vacancies, but also transforms the β -Cu 2 Se with disordered Cu atoms into long-range ordered lamellar α -Cu 2 Se, thereby reducing the carrier concentration and improving the carrier mobility of the films. As a result, a high power factor of 856.59 ± 119.92 μW m −1 K −2 has been achieved in the Cu 2.20 Se film at 303 K. In addition, by numerical simulation, the ideal length of single Cu 2.20 Se film was calculated to be 2 mm. With an actual temperature difference of 6.6 K, a maximum output power density of 2.918 μW cm −2 K −2 , which is superior to those of other p-type flexible thermoelectric films, is realized in the single Cu 2.20 Se film. This work provides a feasible idea to promote the output performance of solution-processed flexible thermoelectric films.
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
·
2023
·Vol. 48
·期 3
·1254-1263
·
IF 3.3
Ziyang Cui,Lu Wang,Yangyang Zhu,Yiqun Zhang,Li Juan Wang
Here, the facile strategy of preparing filamentous copper phthalocyanine (CuPc) based gas sensors using a solution method was studied. Electrical and gas sensitive properties of filamentous CuPc films transistors were studied in detail. The filamentous CuPc films had a three-dimensional and porous structure, the gas analytes could interact more effectively with the gas sensitive layers, and the efficiency of charge carrier conversion into conductive channel increased, thus improving the sensing performance of the sensors. The relative responsivities of 75 mg mL−1 filamentous CuPc films sensors to 20 ppm NO2 gas were 32797%. The response rate was 80%. The sensitivity was 1492%/ppm. The LOD was 0.3 ppm. The successful preparation of filamentous CuPc films and their application in sensors lay a foundation for the future application of phthalocyanine materials in the field of flexible sensing.
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
CHEMICAL PHYSICS
·
2019
·
IF 1.822
Tong-Tong Zhang,Xiang-Dong Gao,Yong-Qing Wu,Jing-Nan Yang,Xiao-Min Li
Cr-doped BaSnO 3 (BaSn 1-x Cr x O 3 , BSCO-x, x = 0–0.15) thin films with nanoporous structure were deposited on fluorine-doped tin oxide substrates via a colloidal solution route. The BSCO-x films exhibited single cubic perovskite phase and nanoporous feature, with the typical specific surface area of 18.98 m 2 /g and pore size of 10.75 nm (BSCO-0.15). The lowest band gap of 2.68 eV and a high transparency (above 70% in 500–800 nm) were realized in BSCO-0.15 film. This work paves a way toward perovskites with tunable band gap and nanoporous structures for varied photo and photoelectric devices.
研究领域:
材料科学
·
光电子学
✓ 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）