Nanomaterials
·
2023
·Vol. 13
·期 15
·2259
·
IF 5.3
Haixia Wu,Zhenxu Lin,Jie Song,Yi Zhang,Yanqing Guo,Wenxing Zhang,Rui Huang
Zero-dimensional (0D) tin halide perovskites feature extraordinary properties, such as broadband emission, high photoluminescence quantum yield, and self-absorption-free characteristics. The innovation of synthesis approaches for high-quality 0D tin halide perovskites has facilitated the flourishing development of perovskite-based optoelectronic devices in recent years. However, discovering an effective strategy to further enhance their emission efficiency remains a considerable challenge. Herein, we report a unique strategy employing rapid heat treatment to attain efficient self-trapped exciton (STE) emission in Cs4SnBr6zero-dimensional perovskite. Compared to the pristine Cs4SnBr6, rapid thermal treatment (RTT) at 200 °C for a duration of 120 s results in an augmented STE emission with the photoluminescence (PL) quantum yield rising from an initial 50.1% to a substantial 64.7%. Temperature-dependent PL spectra analysis, Raman spectra, and PL decay traces reveal that the PL improvement is attributed to the appropriate electron–phonon coupling as well as the increased binding energies of STEs induced by the RTT. Our findings open up a new avenue for efficient luminescent 0D tin-halide perovskites toward the development of efficient optoelectronic devices based on 0D perovskites.Keywords:photoluminescence;self-trapped exciton;Cs4SnBr6;rapid thermal treatment
研究领域:
材料科学
·
光电学
·
光子学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2024
·
IF 5.8
Weida Shi,Zhihao Jin,Juanjuan Wen,Xianfu Chen,Kaiyun Fu,Xiaowei Da,Minghui Qiu,Yiqun Fan
The development of tight ceramic ultrafiltration membranes for water purification facilitates is challenging because of high fabrication costs and low permeate flux . In this study, a low-energy rapid thermal process (RTP) was comprehensively investigated for fabricating of high-precision, permeable α-alumina tight ultrafiltration membranes. Compared to the conventional thermal process (CTP), RTP offers an ultra-fast heating rate and shorter holding time, effectively mitigating grain growth and pore aggregation. Moreover, the decomposition of organic matter is delayed during RTP, providing a lower interfacial energy that enables direct formation of α-alumina at a low temperature of 750 °C. During a secondary subsequent RTP, the residual phase is fully converted to α-alumina by the in-situ seeding effect. By utilizing RTP, we successfully prepared α-alumina ultrafiltration membranes within 30 min by calcination , with an average pore size of approximately 6 nm, a narrow pore distribution coefficient of 1.12, and high permeance of 219 L −1 ·m −2 ·h −1 ·bar −1 .
研究领域:
材料科学
·
环境工程
✓ 已验证
DOI
高影响因子
Materials
·
2023
·Vol. 16
·期 11
·4027
·
IF 3.4
Jisheng Xu,Haixia Wu,Xinye Lu,Yaqian Huang,Jianni Chen,Wendi Zhou,Zewen Lin,Jie Song,Hongliang Li,Rui Huang
We report a rapid synthesis method for producing CsSnCl3:Mn2+perovskites, derived from SnF2, and investigate the effects of rapid thermal treatment on their photoluminescence properties. Our study shows that the initial CsSnCl3:Mn2+samples exhibit a double luminescence peak structure with PL peaks at approximately 450 nm and 640 nm, respectively. These peaks originate from defect-related luminescent centers and the 4T1→6A1transition of Mn2+. However, as a result of rapid thermal treatment, the blue emission is significantly reduced and the red emission intensity is increased nearly twofold compared to the pristine sample. Furthermore, the Mn2+-doped samples demonstrate excellent thermal stability after the rapid thermal treatment. We suggest that this improvement in photoluminescence results from enhanced excited-state density, energy transfer between defects and the Mn2+state, as well as the reduction of nonradiative recombination centers. Our findings provide valuable insights into the luminescence dynamics of Mn2+-doped CsSnCl3and open up new possibilities for controlling and optimizing the emission of rare-earth-doped CsSnCl3.
研究领域:
材料科学
·
光电
·
固体化学
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2020
·Vol. 31
·期 3
·2686-2690
·
IF 2.22
Cao Liqi,Yang Ning,Li Shizheng,Ye Xiaojun,Yuan Xiao,Li Hongbo,Tong Hua
In the present work, alumina gel was developed for passivating silicon wafers. The alumina gel was prepared by sol–gel method with aluminum sec-butoxide as precursor. After coating, rapid thermal process (RTP) was conducted to activate the passivation effect. X-ray photoelectron spectroscopy and C–V curve were executed to evaluate film properties. The peak at 74.35 eV confirmed the formation of Al 2 O 3 . Meanwhile, a small peak at low binding energy decreased with the growth of annealing temperature, which was ascribed to the escape of hydrogen, leading to the decline of effective lifetime after 700 °C. The highest fixed charge (Q f ) of − 1.16e12 cm −2 and superior interface defect density at mid gap (D it ) of 1.98e12 cm −2 eV −1 were obtained at the annealing temperature of 700 °C, contributing to the highest effective minority carrier lifetime of 292 µs. The present work will be helpful to provide a more cost-effective technique for Al 2 O 3 passivation.
研究领域:
材料科学
·
半导体物理
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF PHOTOENERGY
·
2024
·Vol. 2024
·期 1
·3777201
·
IF 2.1
Lina Bing,Wei Wu,Zhenjiang Shen
Bi 2 O 3 -BaTiO 3 heterojunction with high photocatalysis efficiency was directly synthesized by rapid thermal processing (RTP). Bi 2 O 3 and BaTiO 3 were mixed in ratio and treated by RTP and conventional thermal processing (CTP), respectively. RTP samples have obvious Bi 2 O 3 diffraction peaks, while CTP samples show pure BaTiO 3 tetragonal perovskite. More small particles and layered existed in RTP samples. Photodegradation of MB solutions shows that RTP can promote photocatalytic efficiency. Its main lies in the following points: RTP can remove grain boundary defects by strengthening the bond grains; RTP can limit the solution region of the two substances to a certain range to get the best built-in electric field width; and RTP can strengthen the tetragonal BaTiO 3 phase to hasten ion movement. Therefore, RTP can achieve much higher photocatalytic efficiency by improving the build heterojunction. This work provides a direct and efficient route to get improvement and high performance of heterojunction.
研究领域:
材料科学
·
环境科学
✓ 已验证
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
Materials Science and Engineering B-Advanced Functional Solid-State Materials
·
2023
·
IF 3.6
Chong Ke,Chenhua Zhang,Yongdong Jiang
In this study, a rapid thermal process, which can be achieved via the conventional glass tempering process, was utilized to fabricate silica-based superhydrophilic antifogging coatings with micro-nano hierarchical roughness on glass substrates. The effects of SiO 2 nanoparticle and triethylborate loadings on the coatings’ properties have been systematically investigated. Moreover, the formation mechanism of such coatings has been explained. The optimal coatings demonstrate a high level of hydrophilicity with a water contact angle (WCA) of ∼ 0°. Meanwhile, such coatings exhibit good antifogging effect and robustness as well.
研究领域:
材料科学
·
表面工程
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2016
·Vol. 4
·期 35
·13476-13481
·
IF 8.262
Dandan Zhao,Qingmiao Fan,Qingwen Tian,Zhengji Zhou,Yuena Meng,Dongxing Kou,Wenhui Zhou,Sixin Wu
A non-hydrazine solution process has been considered as a promising way for the deposition of Cu(In,Ga)(S,Se)2(CIGSSe) thin films. However, from our previous work, the presence of a fine-grained layer in the absorber layer was shown to be an obstacle to further improve the solar cell efficiency. Here, an improved fabrication route is proposed to solve this problem. A mixture of Cu2S, In2Se3, Ga and Se was simultaneously dissolved in 1,2-ethanedithiol and 1,2-ethylenediamine, forming a homogeneous precursor solution to deposit CIGSSe nanocrystal films. By optimizing the selenization method by using rapid thermal processing (RTP) combined with an improved graphite box, large grains throughout the whole absorber layer were successfully obtained. Based on such a high-quality CIGSSe absorber layer, an encouraging power conversion efficiency of 11.8% has been achieved with a Jsc of 28.25 mA cm−2, a Voc of 596 mV and a FF of 69.79% and without an antireflection coating.
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
Journal of Materials Chemistry A
·
2025
·
IF 9.5
Jun Cao,Kai-Yue Ji,Ming-He Du,Chi Zhang,Qi Sun,Ying Yi,Ze-Fan Chai,Chun-Jie Yan,Heng Deng
Template-assisted pyrolysis enables the synthesis of Fe-based carbonaceous materials with a defined morphology and structure from iron–carbon precursors. However, conventional tangible templates are costly and have limited applications, and their removal process is time-consuming and environmentally harmful. Here, we employ an ultrafast heating technique (1 second to 1800 °C) using a carbothermal shock reactor to treat iron–carbon precursors. The high-density volatile vapor generated during the rapid pyrolytic carbonization of the precursor acts as a pore-forming agent, resulting in a porous carbon matrix. This high-density vapor also restricts the growth area of iron-based nanoparticles, promoting them to form ultrafine small sizes through confined synthesis. Finally, we successfully prepared the CTS–Fe–C-1800 hybrid material containing a porous carbon matrix and iron carbide nanoparticles and tested its electrochemical performance as a multifunctional electrode. As an electrode, the CTS–Fe–C-1800 supercapacitor (SC) exhibits a high specific capacity of 425.5 F g−1 at 0.5 A g−1. Moreover, the CTS–Fe–C-1800 flexible micro-supercapacitor (MSC), prepared using a PVA/KOH gel electrolyte and CTS–Fe–C-1800, demonstrates an impressive energy density of 71.49 W h kg g−1 at 0.637 kW kg g−1. Additionally, when employed as an anode electrode in a Li-ion battery (LIB), the CTS–Fe–C LIB maintains a capacity of 801.2 mA h g−1 after 1000 cycles at 1 A g−1, surpassing the performance of the majority of reported Fe–C anode electrodes.
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
产品关联
DOI
高影响因子
Advanced Materials Interfaces
·
2021
·Vol. 8
·期 18
·2100971
·
IF 6.147
Saqib Nawaz Khan,Sijie Ge,Ening Gu,Santhosh Kumar Karunakaran,Wentao Yang,Ruijiang Hong,Yaohua Mai,Xianzhong Lin,Guowei Yang
The use of transparent conducting oxides (TCO) as a back contact for Cu 2 ZnSn(S,Se) 4 (CZTSSe) thin film solar cell enables light absorption from both front and rear sides and allows for the fabrication of semi-transparent photovoltaic devices. However, the CZTSSe solar cell based on TCO substrate suffers from high parasitic losses owing to the long post-annealing time at elevated temperature required for high-quality absorber. This work aims to overcome this issue by carefully tailoring the annealing conditions to obtain high-performance solar cell. Rapid thermal processing is used to instantaneously generate high Se vapor pressure at target temperature and shorten the annealing time. The crystalline quality, morphology, and particularly the photovoltaic performance of the resulting CZTSSe thin film are systematically investigated. It is found that the increase of annealing temperature and time improves the crystalline quality but unfortunately deteriorates the device performance owing to increasing parasitic losses. Increasing the amount of Se allows to get highly crystalline absorber within 7 min of annealing, yielding a total area 5.56% efficient CZTSSe solar cell with front illumination resulting from reducing parasitic losses. This work provides a simple approach to preserve the back contact without using a complex interfacial layer.
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
Small
·
2024
·Vol. 21
·期 1
·2403051
·
IF 13
Yandi Luo,Hongli Ma,Nafees Ahmad,Usman Ali Shah,Zhuanghao Zheng,Shuo Chen,Zhenghua Su,Jun Zhao,Xianghua Zhang,Guangxing Liang
Antimony selenide (Sb 2 Se 3 ) has demonstrated considerable potential and advancement as a light-absorbing material for thin-film solar cells owing to its exceptional optoelectronic characteristics. However, challenges persist in the crystal growth, particularly regarding the nucleation mechanism during pre-selenization process for Sb 2 Se 3 . The defects originating from this process significantly impact the quality of the absorber layer, leading to the degradation in the power conversion efficiency (PCE) of the device. Herein, the evolution of pre-selenization using rapid thermal processing (RTP) on the crystallization quality of Sb 2 Se 3 film is systematically investigated. By optimizing the initial nucleation process during pre-selenization, resulting in a reduction of grain boundaries and nucleation centers, the Sb 2 Se 3 thin films demonstrate enhanced crystallinity and pinholes-free morphology. It is found that the improved quality of the grain interior and interfaces of the Sb 2 Se 3 absorber can mitigate intrinsic defects within the bulk layer, and passivate interfacial defect recombination. As a result, the short circuit current density ( J SC ) is elevated to 28.97 mA cm −2 , and a competitive efficiency of 9.03% is achieved in Sb 2 Se 3 device. This study provides comprehensive insight into the process of crystal growth and the mechanism for defect suppression, which holds guiding significance for advancing photovoltaic performance.
研究领域:
材料科学
·
光伏技术
·
半导体物理
·
薄膜制备
·
凝聚态物理
·
能源材料
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）