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.
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SOLAR ENERGY
·
2017
·
IF 4.018
Yingli Pei,Jing Guo,Dongxing Kou,Wenhui Zhou,Zhengji Zhou,Qingwen Tian,Yuena Meng,Sixin Wu
The doping of indium into absorber layer has been proven to be beneficial for hybrid buffer structured Cu 2 ZnSn(S, Se) 4 (CZTSSe) solar cells, but it is difficult to precisely control the doping content only relying on In diffusion from In 2 S 3 emitter. Herein, we use the solution method to prepare In-substituted CZTSSe layer by directly doping In 2 Se 3 into metal chalcogenides precursor solution. The doping content can be precisely controlled and the influences of indium doping on cell performance are systematically discussed. Mott-Schottky and resistivity measurements indicate that the carrier concentration and charge transport process are monotonically enhanced with increasing In/(In + Sn) content (0 at.%, 3 at.%, 6 at.% and 12 at.%). The improvements of series resistance also lead to a monotonic increase of fill factor ( FF ) from 52.1% to 64.8%. Due to the larger recombination at high doping content, the 6 at.% In content device finally contributes the highest power conversion efficiency of 8.47%. It is expected that a precisely controlled indium doping could further improve cell performance for efficient hybrid buffer structured devices.
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ELECTROCHIMICA ACTA
·
2017
·
IF 4.798
Chun Tang,Zhi Liang Zhao,Jie Chen,Bo Li,Liang Chen,Chang Ming Li
The direct urea fuel cell holds great promise for energy-sustainable developments and mitigating water contamination but it still faces a great challenge to overcome the sluggish kinetics of the urea oxidation reaction (UOR). In this work, we report Se-Ni(OH) 2 -shelled vertically oriented NiSe nanowires on a Ni foam as an electrocatalyst toward UOR, showing a low potential of 0.366 V vs. SCE to drive 100 mA cm −2 in alkaline solution and out-performing all the reported non-noble-metal UOR catalysts up to date. Experimental results and theoretical calculation reveal that the vertically and distantly arranged nanowires with highly porous structure produce high mass transport paths for urea to fully access the reaction sites, the NiSe core offers high conductivity for fast electron transport , and the Se-Ni(OH) 2 shell provides large amount of active catalytic sites while lowering the CO 2 adsorption/desorption barrier than Ni(OH) 2 for fast reaction kinetics. This work opens up an exciting new direction to design electrocatalysts for high performance fuel cells and other energy applications.
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ACS Applied Materials & Interfaces
·
2014
·
IF 5.9
Wangen Zhao,Gang Wang,Qingwen Tian,Yanchun Yang,Lijian Huang,Daocheng Pan
Cu2ZnSn(S,Se)4 semiconductor is a promising absorber layer material in thin film solar cells due to its own virtues. In this work, high quality Cu2ZnSn(S,Se)4 thin films have been successfully fabricated by an ethanol-based sol–gel approach. Different from those conventional sol–gel approaches, SnS2 was used as the tin source to replace the most commonly used SnCl2 in order to avoid the possible chlorine contamination. In addition, sodium was found to improve the short-circuit current and fill factor rather than the open-circuit voltage due to the decrease of the thickness of small-grained layer. The selenized Cu2ZnSn(S,Se)4 thin films showed large densely packed grains and smooth surface morphology, and a power conversion efficiency of 6.52% has been realized for Cu2ZnSn(S,Se)4 thin film solar cell without antireflective coating.
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Journal of Energy Chemistry
·
2024
·
IF 14
Shicheng Deng,Songfan Wang,Yuanyuan Wang,Qian Xiao,Yuena Meng,Dongxing Kou,Wenhui Zhou,Zhengji Zhou,Zhi Zheng,Sixin Wu
Kesterite Cu 2 ZnSn(S,Se) 4 (CZTSSe) solar cells suffer from severe carrier recombination, limiting the photovoltaic performance. Unfavorable energy band alignment at the p-n junction and defective front interface are two main causes. Herein, oxygen incorporation in CZTSSe via absorber air-annealing was developed as a strategy to optimize its surface photoelectric property and reduce the defects. With optimized oxygen incorporation conditions, the carrier separation and collection behavior at the front interface of the device is improved. In particular, it is found that oxygen incorporated absorber exhibits increased band bending, larger depletion region width, and suppressed absorber defects. These indicate the dynamic factors for carrier separation become stronger. Meanwhile, the increased potential difference between grain boundaries and intra grains combined with the decreased concentration of interface deep level defect in the absorber provide a better path for carrier transport. As a consequence, the champion efficiency of CZTSSe solar cells has been improved from 9.74% to 12.04% with significantly improved open-circuit voltage after optimized air-annealing condition. This work provides a new insight for interface engineering to improve the photoelectric conversion efficiency of CZTSSe devices.
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JOURNAL OF MEDICINAL CHEMISTRY
·
2024
·
IF 6.8
Fangyuan Chen,Qingmei Liu,Lei Ma,Cuishi Yan,Haiman Zhang,Zhi Zhou,Wei Yi
Recent studies have identified selective peroxisome proliferator-activated receptor γ (PPARγ) modulators, which synergistically engage in the inhibition mechanism of PPARγ-Ser273 phosphorylation, as a promising approach for developing safer and more effective antidiabetic drugs. Herein, we present the design, synthesis, and evaluation of a new class of organo-Se compounds, namely, benzothiaselenazole-1-oxides (BTSAs), acting as potent, reversible, and selective PPARγ covalent modulators. Notably, 2n, especially (R)-2n, displayed a high binding affinity and superior antidiabetic effects with diminished side effects. This is mainly because it can reversibly form a unique covalent bond with the Cys285 residue in PPARγ-LBD. Further mechanistic investigations revealed that it manifested such desired pharmacological profiles primarily by effectively suppressing PPARγ-Ser273 phosphorylation, enhancing glucose metabolism, and selectively upregulating the expression of insulin-sensitive genes. Collectively, our results suggest that (R)-2n holds promise as a lead compound for treating T2DM and also provides an innovative reversible covalent warhead reference for future covalent drug design.
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SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2024
·
IF 6.3
Yanqing Wang,Mengzhu Li,Dongchen Guo,Min Fan,Jingjun Zhang,Juan Guo,Hongzhan Dong,Chengwu Shi
Antimony selenosulfide (Sb 2 (S,Se) 3 ) solar cells hold significant promise for sustainable photovoltaic technology due to their adjustable band gap, high absorption coefficient and good stability. In terms of device operation, the transfer of electrons from the Sb 2 (S,Se) 3 layer to the electron transport layer (ETL) plays a crucial role in improving the photovoltaic performance of solar cells. Until now, high-efficiency Sb 2 (S,Se) 3 solar cells have typically employed cadmium sulfide (CdS) as the ETL. However, inadequate interface contact between the CdS and the Sb 2 (S,Se) 3 layer often results in severe interface recombination, and the parasitic light absorption of CdS restricts the short-circuit current density ( J sc ). Therefore, the development of high-quality CdS film along with reduction of cadmium element usage remains an import issue for the Sb 2 (S,Se) 3 solar cells. Herein, the poly(acrylic acid)-modified tin oxide (PAA-SnO 2 )/CdS double ETLs are introduced to improve the quality of both the CdS film and Sb 2 (S,Se) 3 film, while also strengthening the interface contact between CdS and Sb 2 (S,Se) 3 . The power conversion efficiency of the corresponding solar cells increases from 7.45% in the control device to 8.15% in the modified device. This work provides a simple PAA-modified SnO 2 -assisted CdS ETL strategy to improve the interface of CdS/Sb 2 (S,Se) 3 , thereby achieving efficient and stable Sb 2 (S,Se) 3 solar cells.
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Journal of Materials Chemistry A
·
2025
·
IF 9.5
Wenhao Liu,Wei Li,Zhao Liang,Yufei Feng,Shaobo Ye,Chenchen Yue,Rui Ming,Xuyang Lu,Weiyou Yang,Qing Shi
The development of efficient and stable catalysts for oxygen evolution reaction (OER) is critical for the progress of electrocatalytic alkaline water and seawater hydrogen production. Herein, we report a Se-vacancy-rich Fe-doped NiSe nanosheets (VSe-FeNiSe/NFF) with remarkable OER performance in both alkaline and seawater media. It is revealed that the Se vacancies significantly promote the structural reconstruction during the OER process, which facilitates the formation of highly active NiFeOOH and SeO₄²⁻ species, thus delivering exceptional catalytic activity and stability. In alkaline media, they require an overpotential of 242 mV to achieve a current density of 100 mA cm-2, with a low Tafel slope of 27.2 mV dec-1 and robust stability over 500 h. Meanwhile, in seawater media, they just require an overpotential of 253 mV to achieve 100 mA cm-2, with a Tafel slope of 37.8 mV dec-1. Impressively, they could be operated stably for 100 h at 100 mA cm-2. This work not only elucidates the roles of Se vacancies in the reconstruction of selenides during the OER process, but also offers meaningful insight on exploring advanced electrocatalysts for OER in both alkaline water and seawater media.
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Solar RRL
·
2024
·
IF 6
Chenxi Zhao,Bowen Liu,Fuyan Chen,Jiaxin Gao,Xinan Shi,Daocheng Pan
Cu(In, Ga)(S, Se) 2 (CIGSSe) solar cell is one of the most promising thin-film solar cells with a record power conversion efficiency (PCE) of 23.6%. Conventional CIGSSe thin-film solar cells are usually fabricated on Mo-coated soda-lime glass substrate, thereby, the sunlight on the rear side cannot be utilized by the monofacial CIGSSe solar cells owing to the opacity of the Mo electrode. CIGSSe solar cells fabricated on transparent conductive oxide (TCO) electrode enable to fabricate bifacial solar cells, which can generate power on both sides of solar cells, so that bifacial solar cells have a high potential application in building-integrated photovoltaics. However, the PCEs of CIGSSe solar cells fabricated on TCO substrates are significantly lower than those of ones on Mo substrates. In this article, bifacial CIGSSe solar cells on fluorine-doped tin oxide (FTO) substrate are fabricated by using an ionic liquid-assisted solution approach and utilizing a MoO 3 thin film as an interface layer between FTO and CIGSSe absorber layer, yielding a front-side PCE of 9.73% and a back-side PCE of 1.77%.
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Food Chemistry-X
·
2024
·
IF 6.5
Mengmeng Zhang,Jingbo Liu,Yu Gao,Bing Zhao,Meng-Lei Xu,Ting Zhang
A Se site targeted-two circles antioxidant of polyphenols EGCG and genistein in glutathione peroxidase 4 (GPx4)–like catalytic peroxide H 2 O 2 and cumene hydroperoxide degradation was demonstrated by surface-enhanced Raman scattering (SERS). Se atom's active center is presenting a ‘low-oxidation’ and a ‘high-oxidation’ catalytic cycle. The former is oxidized to selenenic acid (SeO − ) with a Raman bond at 619/ 610 cm −1 assigned to the νO − Se by the hydroperoxide substrate at 544/ 551 cm −1 assigned to ωHSeC decreased. Under oxidative stress, the enzyme shifted to ‘high-oxidation’ catalytic cycle, in which GPx4 shuttles between R-SeO − and R-SeOO − with a Raman intensity of bond at 840/ 860 cm −1 assigned to νO Se. EGCG could act as a reducing agent both in H 2 O 2 and Cu-OOH degradation, while, genistein can only reduce Cu-OOH, because it binds more readily to the selenium site in GPx4 than EGCG with a closer proximity, therefore may affect its simultaneous binding to coenzymes.
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Carbon Energy
·
2025
·Vol. 7
·期 5
·e70001
·
IF 24.2
Qianfeng Wu,Chuanhao Li,Shuo Chen,Zhenghua Su,Muhammad Abbas,Chao Chen,Qianqian Lin,Jingting Luo,Liming Ding,Guangxing Liang
Visible and near-infrared photodetectors are widely used in intelligent driving, health monitoring, and other fields. However, the application of photodetectors in the near-infrared region is significantly impacted by high dark current, which can greatly reduce their performance and sensitivity, thereby limiting their effectiveness in certain applications. In this work, the introduction of a C 60 back interface layer successfully mitigated back interface reactions to decrease the thickness of the Mo(S,Se) 2 layer, tailoring the back-contact barrier and preventing reverse charge injection, resulting in a kesterite photodetector with an ultralow dark current density of 5.2 × 10 −9 mA/cm 2 and ultra-weak-light detection at levels as low as 25 pW/cm 2 . Besides, under a self-powered operation, it demonstrates outstanding performance, achieving a peak responsivity of 0.68 A/W, a wide response range spanning from 300 to 1600 nm, and an impressive detectivity of 5.27 × 10 14 Jones. In addition, it offers exceptionally rapid response times, with rise and decay times of 70 and 650 ns, respectively. This research offers important insights for developing high-performance self-powered near-infrared photodetectors that have high responsivity, rapid response times, and ultralow dark current.
研究领域:
光电子学
·
光探测器
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材料科学
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半导体器件
·
可再生能源
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MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
·
2025
·
IF 4.6
Rui Wang,Yanchun Yang,Guonan Cui,Lulu Bai,Zhihui Gong,Chengjun Zhu
CuSb(S, Se) 2 (CASSe) is known to have great potential for copper-based low-cost thin-film solar cells due to its excellent stability, earth-abundant raw materials, and suitability for the low-temperature preparation process. In this work, CASSe thin-film solar cells were prepared using the green n-butylammonium butyrate ionic solution-based method for the first time. The phase purity, crystallinity , morphology, and electrical properties of films prepared at different conditions (sintering and selenization conditions) were studied. With the help of the XRD , Raman spectra , SEM, and c-AFM measurements, the optimal preparation of CASSe thin film is confirmed at 230 °C for 3 min (sintering condition) and 390 °C for 20 min (selenization condition). Using glass/Mo/CuSb(S, Se) 2 /CdS/i-ZnO/ITO/Al as the structure of the device, the corresponding thin film solar cell can be fabricated, which presents a photoelectric conversion efficiency (PCE) of 0.14 %. Although the performance of the device is poor, our conclusions are meaningful in the development of CASSe material, supplementing the blank of preparing CASSe thin film solar cells by the green solution-based method.
研究领域:
材料科学
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新能源技术
·
半导体薄膜
·
光伏器件
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危险品化学品经营许可证（带存储）