Journal of Materials Chemistry C
·
2018
·Vol. 6
·期 10
·2573-2579
·
IF 5.976
Ruiqi Guo,Ting Shen,Jianjun Tian
“Green” narrow band-gap CuInSe2 quantum dots (QDs) were first introduced in photodetectors. Thus, a broadband hybrid photodetector was obtained by combining the ultraviolet detection of spiro-OMeTAD and the near-infrared detection of CuInSe2 QDs. In order to improve the detection of the device, the oil-soluble CuInSe2 QDs were transformed into water-soluble MPA-capped QDs through ligand exchange, which drastically shortened the length of the surface ligand. The specific detectivity (D*) of the photodetector reached 1.6 × 1012 Jones at 330 nm and 7.5 × 1010 Jones at a 1000 nm wavelength. The unencapsulated device also displayed a fast response time (<0.02 s) and excellent thermal stability (20–100 °C) in ambient air. This work could open a window of toxic-free QD based photodetectors to achieve a broadband response.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
SUPERLATTICES AND MICROSTRUCTURES
·
2013
·
IF 1.564
Zhaoxia Han,Dawei Zhang,Daohua Zhang,Ruijin Hong,Qinmiao Chen,Chunxian Tao,Yuanshen Huang,Zhengji Ni,Songlin Zhuang
Highly dispersed and near stoichiometric chalcopyrite CuInSe 2 nanoparticles were successfully synthesized via a facile and rapid one-pot method. For understanding the reaction pathway, the solid intermediates obtained at different stages of CuInSe 2 nanoparticles synthesis process were investigated in detail by powder X-ray diffraction (XRD), X-ray photoelectron spectrometer (XPS), energy dispersive spectroscopy (EDS) and Raman spectroscopy . The XRD patterns showed that the phase formation sequence was CuSe → CuInSe 2 . The XPS results indicated that the valences of Cu and Se in CuSe were +1 and −1, respectively. The chemical composition of the solid intermediates revealed the presence of the solid-state In–Se secondary phases in the synthesis process. However, no XRD signals or Raman signals of the solid-state In–Se secondary phase were observed. Based on the experimental results, the possible reaction pathway was proposed.
研究领域:
材料科学
·
化学
✓ 已验证
DOI
高影响因子
ACS Nano
·
2020
·
IF 14.588
Jiajia Ning,Zonghui Duan,Stephen V. Kershaw,Andrey L. Rogach
Synthetic routes to deposit CuInS2 (CIS) shells with either a cubic chalcopyrite (CP) or a hexagonal wurtzite (WZ) phase on trigonal pyramidal-shaped CuInSe2 (CISe) core nanocrystals (NCs) with a cubic CP crystal structure have been developed and governed by tuning the amount of the sulfur precursor tert-dodecanethiol. During the synthesis of CP-CIS/CP-CISe core/shell NCs, the CP-CIS shell initially starts to grow epitaxially in a uniform way, while the further addition of the CIS precursor induces islandlike growth, and finally a branched CIS shell is formed. In a stark contrast, when a WZ-CIS shell is deposited, it initially grows on a portion of each of the facets of the trigonal pyramidal-shaped CISe cores to form a monolayer, which then continues to increase in thickness and forms a multilayered WZ-CIS shell. Both CP-CISe/CP-CIS core/shell NCs and CP-CISe/WZ-CISe core/shell NCs exhibit rather low photoluminescence quantum yields (<10%), even with a smaller-sized CISe core, which calls for further refinements of the shell growth methods. Synthetic methods for the growth of CIS shells as described here allow for direct deposition of cadmium-free ternary compounds as shell materials and provide important insights into the different modes of growth of heterostructured NCs, ranging from epitaxial to island- and branched-like, as well to the facet-specific multilayer deposition.
研究领域:
材料科学
·
纳米技术
·
化学合成
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Dan Liu,Yuxiao Guo,Yawei Yang,Jie Liu,Xingtian Yin,Wenxiu Que
The organic-inorganic halide perovskite (OIHP) materials are becoming promising, but there is still inherent defect-mediated-carrier recombination in hybrid perovskite materials, thus, leading to inefficient power conversion efficiency (PCE). The defect states, which act as the recombination centers, are usually formed during crystallization process . Here, by a hot injection method, Na 2 S ligand exchange is applied to synthesize copper indium selenium quantum dots (CuInSe 2 QDs), which are well dispersed in N,N-dimethylformamide (DMF) and then added into perovskite precursor solution. The resulted QD-in-perovskite structure is found to be beneficial for enlarging grain size, and thus exhibits an improved crystallinity and absorption due to the passivation of trap states. Hence, the perovskite solar cell (PSC) based on the MAPbI 3 -CuInSe 2 QD hybrid film show an improved carrier lifetime from 58.17 ns to 243.23 ns and an enhanced PCE from 16.3% to 18.4% due to higher open-circuit voltage, compared to the cell device based on the pure perovskite film. Additionally, the optimized cell device presents better stability, which can still keep 75% of the initial PCE after 20-day storage. Such a simple Na 2 S ligand exchange to introduce QD into perovskite provides strong potential for preparing other hybrid materials .
研究领域:
材料科学
·
能源技术
·
光伏器件
✓ 已验证
DOI
高影响因子
NANO
·
2017
·
IF 1.025
Dehui Li,Weichen Qi,Jinglei Xiao,Jing Yang,Yong Wu,Qiao Gao,Shengyong Zhai
The facile and ecofriendly method for the synthesis of a suitable colloidal nanocrystal ink plays an important role in the field of solar cells. Here, we describe our recent efforts toward this direction by a simple one-pot colloidal method to engineer CuInSe 2 (CISe) nanocrystals with cubic zincblende (ZB) structure. The suitable band gap value and obvious photoresponse of the as-synthesized CISe nanocrystals indicate their potential application in the field of thin film solar cells. In addition, a possible crystal growth mechanism has been suggested for the formation of ZB CISe.
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
POWDER TECHNOLOGY
·
2013
·
IF 2.024
Zhaoxia Han,Dawei Zhang,Qinmiao Chen,Ting Mei,Songlin Zhuang
In this work, highly dispersed and near stoichiometric chalcopyrite CuInSe 2 nanoparticles were successfully synthesized via a facile and rapid one-pot method. The effects of reaction temperature and reaction time on the crystal phase, morphology, element composition and the absorption spectrum of the as-synthesized CuInSe 2 nanoparticles were investigated by x-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), energy dispersive X-ray spectroscopy (EDX) and UV-Vis-IR spectrophotometer, respectively. The XRD patterns showed that the as-synthesized nanoparticles had pure chalcopyrite phase with the particle size in the range of 50–300 nm confirmed by FE-SEM images. The Vis-IR absorption spectra showed strong absorption in the entire visible light to near-infrared region, the estimated band gap of the as-synthesized nanoparticles matched very well with that of the bulk CuInSe 2 material. All results suggested that the as-synthesized CuInSe 2 nanoparticles were good light absorber layer material for thin film solar cell.
研究领域:
材料科学
·
能源技术
·
纳米技术
✓ 已验证
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2020
·Vol. 44
·期 6
·2303-2311
·
IF 3.288
Ning Jiang,Hongchao Geng,Yan Qiao,Xingqi Zhu,Chenyi Li,Qingyun Cai
A visible-light-active CuInSe2:Zn/g-C3N4/TiO2 nanowire (NW) photoelectrode was prepared by in situ growth of g-C3N4 on the surface of TiO2 NWs, followed by drop deposition of Zn-doped CuInSe2 quantum dots (CuInSe2:Zn QDs). It has a 2.205 eV band gap and can absorb visible light. The as-prepared ternary hybrid nanocomposite CuInSe2:Zn/g-C3N4/TiO2 NWs shows high photon absorption and photocurrent generation efficiency, as well as a high bactericidal effect on Staphylococcus aureus.
研究领域:
材料科学
·
微生物学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
ORGANIC ELECTRONICS
·
2019
·
IF 3.495
Yan Zhang,Zhenlong Zhang,Yanyan Liu,Yuefeng Liu,Huiping Gao,Yanli Mao
In this work, we synthesized CuInSe 2 quantum dots (CISe QDs) and applied them to perovskite solar cells (PSCs) as an inorganic hole-transporting material (HTM). A power conversion efficiency (PCE) of 12.8% was achieved for the PSCs using CISe QDs as the HTM, which is the highest value reported to date for devices with a Cu-based chalcopyrite semiconductor as HTM. More importantly, the stability of PSCs with CISe QDs was significantly improved compared with that of the devices using spiro-OMeTAD as the HTM. These results demonstrate that CISe QDs are a promising inorganic HTM for PSCs with long-term stability and low cost.
研究领域:
材料科学
·
光伏技术
·
纳米材料
·
能源化学
·
半导体物理
✓ 已验证
DOI
高影响因子
JOURNAL OF CRYSTAL GROWTH
·
2019
·
IF 1.573
Kun Wang,Baokun Liu,Peixu Yang,Jinhui Liu,Weidong Zhang,Chengduo Wang,Haojie Lü,Guanwei Jia,Rongbin Li,Shaojun Zhang,Jiang Du
Branched CuInSe 2 nanowires (NWs) are successfully synthesized by one-pot method for making secondary bismuth nanoparticles to attach onto the CuInSe 2 NWs stem for inducing the secondary branch growth by solution-liquid-solid (SLS). The branched CuInSe 2 NWs were measured in order to reveal its viability for PV device fabrication and application for the light-absorbing material in solar cells.
研究领域:
材料科学
·
纳米技术
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMISTRY OF MATERIALS
·
2020
·
IF 9.567
Jiajia Ning,Yuan Xiong,Fei Huang,Zonghui Duan,Stephen V. Kershaw,Andrey L. Rogach
A range of different copper-based sulfide shells, such as CuInS2, CuInZnS2, CuInS2-xSex, and CuInZnS2-xSex, have been grown on CuInSe2 (CISe) nanocrystals (NCs) in order to improve their photoluminescence quantum yield (PLQY). Starting from initial CISe core NCs with PLQY of 0.4%, the deposition of the CuInS2 shell has increased the PLQY to 4.5%, while introducing Zn or Se elements into the CuInS2 shell to form cation-alloyed CuInZnS2 or anion-alloyed CuInS2-xSex shells improved their PLQYs to 8% and 11%, respectively. Limitations on PLQY for the mentioned shell materials were related to the lattice mismatch with the CISe core material, and the band gap alignment in the core/shell NCs for quasi type-II nanostructures. This could be mitigated by growing a multinary CuInZnS2-xSex shell on the CISe core NCs, which resulted in further improvement of their PLQY to 20% for the emission centered at 920 nm. This study offers guidance for the rational selection of copper-based sulfide shell materials that are able to significantly improve the PLQY of heavy-metal free CISe NCs in the near-infrared spectral range of 834–1028 nm, which is relevant for biological labeling, optoelectronics, and sensing.
研究领域:
材料科学
·
光学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMISTRY OF MATERIALS
·
2021
·
IF 9.811
Chao Pang,Shiben Hu,Chan Guo,Jiantai Wang,Shenghan Zou,Zhangxu Pan,Jiucheng Liu,Liming Shen,Ningzhong Bao,Honglong Ning,Arunava Gupta,Zheng Gong
Nanocrystal (NC) CuInSe2 thin-film transistors (TFTs), consisting of nontoxic and relatively abundant elements, have great potential in environment-friendly and low-cost electronic devices. However, the high-performance CuInSe2 NC TFTs reported so far utilize toxic compounds, such as CdSe and hydrazine, which often require tedious and complex procedures. TFTs using directly synthesized CuInSe2 NCs as channel layers exhibit promising device performances but are still not comparable to the counterparts of cadmium and lead chalcogenide-based NCs. In this work, an efficient solution-based colloidal synthesis and ligand-exchange process have been developed to effectively remove bulky surfactant ligands from CuInSe2 NCs and produce unique inorganically connected NCs through metal-sulfide bonding using simple metal-free chalcogenide compounds. Such inorganically connected CuInSe2 NC thin films, combined with surface treatment, substantially affect charge transport through trap states and tunneling transport mechanism. The carriers tunneling through the barrier between neighboring NCs with much shorter interparticle distances significantly enhance electronic coupling and improve the electrical transport properties. CuInSe2 NC TFT exhibits the electrical performance with a mobility of 9.6 cm2/(V s), on/off current ratio over 104, and negligible hysteresis at low operating voltages, comparable to those for state-of-the-art II–VI- and IV–VI-type NC TFTs. As a proof of concept, the CuInSe2 NC TFTs are used as building blocks of integrated inverters to demonstrate their promise for low process temperature-fabricated NC circuits.
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
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
危险品化学品经营许可证（带存储）