检索结果-南通市图书馆

Effect of ammonia concentration of complexing agent on CdxZn1-xS buffer layer by chemical bath deposition and performance of CIGS cell

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Optoelectronics letters 2025年

作者： lU yahan xue yuming DAI Hongli WANG luoxin ZHOU liwei TAN Zhiyuan Institute of New Energy Intelligence Equipment， School of Integrated Circuit Science and Engineering， Tianjin University of Technology

In this paper， CdxZn1-xS thin films were deposited on glass substrates by chemical bath deposition （CBD），and the effects of different concentrations of ammonia water on the morphology， structure and optical properties of the films were studied. CdxZn1-xS thin films have hexagonal crystal structure， the transmittance is above 75% in the visible range， and the optical band gap is between 2.6 eV and 2.9 eV. The influence of the experimental group of deposited thin films on the performance parameters of the CIGS battery was studied by simulation with SCAPS-1D software and the cell efficiency reached 22.42%. It is introduced that the buffer layer prepared in this experiment is feasible in CIGS solar cells.

关键词：

Enhancing the performance of the absorber of Cu2ZnSn（S， Se）4 photovoltaic materials by doping Cd2+

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Optoelectronics letters 2025年

作者： yANG Shuqi xue yuming DAI Hongli WANG luoxin ZHANG Haiwei BAI Xin Institute of New Energy Intelligence Equipment， School of Integrated Circuit Science and Engineering， Tianjin University of Technology

Cationic doping is considered to be an effective way to improve the efficiency of Cu2ZnSn（S，Se）4（CZTSSe） photovoltaic materials. To improve the quality of the absorption layer of the crystal film， CZTSSe film was doped with some Cd to change the ratio of Cd and Zn in the precursor solution. XRD， Raman， SEM， UV-Vis spectroscopy， and other results showed that Cd successfully replaced Zn in the crystal lattice during post-selenization. The formation of harmful Zn-related defects was reduced， the grain size and crystallinity of the films were significantly increased， and the photoelectric properties of the films such as crystal quality and structural morphology were improved. As the Cd/（Cd+Zn） ratio increased from 0 to 0.35， the band gap of CZCTSSe decreased to 1.02eV. When Cd/（Cd+Zn）=0.25， the crystallinity and grain size reached the best value， and the film surface was smooth and dense， which inhibited the formation of the second phase on the surface of *** theoretical basis and experimental results showed that proper Cd doping can promote the growth of grain， so that compact CZCTSSe films with larger grain sizes and fewer holes could be prepared.

关键词：

Influence of band gap and different defects on the performance of Cu（In， Ga）Se2 solar cells

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Optoelectronics letters 2025年

作者： lU yahan xue yuming DAI Hongli WANG luoxin lI Weiwei JI licui Institute of New Energy Intelligence Equipment， School of Integrated Circuit Science and Engineering， Tianjin University of Technology

The SCAPS-1D simulator， a one-dimensional solar cell capacitance simulator is utilized for simulating CIGS solar cells. It has been observed that the performance of solar cells can be enhanced by uniformly adjusting the band gap value of the CIGS absorption layer. Upon doing so， the solar cell's conversion efficiency reaches 22.13% when the band gap of the CIGS absorption layer is 1.3eV. Subsequently， the influence of defect type and density on photoelectric properties is analyzed by using the improved absorption band gap. The findings indicate that to heighten the photovoltaic efficiency， it is imperative to minimize the defect concentration in the absorption layer， as high-density defects significantly impact the efficiency， and can even render the conversion efficiency to zero. This study underscores the pivotal influence of band gap adjustments and defect charge types on the photoelectric properties of thin film solar cells.

关键词：

Optimization of CZTSSe thin film solar cell performance using PbS back surface field layer

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Optoelectronics letters 2025年

作者： WENJING lUO ZHIJIAN BAI yUMING xue lUOXIN WANG yANHONG DING HONGlI DAI Tianjin Key laboratory of Film Electronic & Communication Devices， School of Electronics Information Engineering， Tianjin University of Technology School of Materials Science and Engineering ，Jilin University

CZTSSe is an Earth-abundant， environmentally friendly， and low-cost material， with a current record power conversion efficiency of 14.9%， This result is well below the prediction of the Shockley-Queisser limit. To improve the performance of solar cells， a layer of PbS (BSF) was added to the CZTSSe， which was simulated using the SCAPS-1D software. The optimal photovoltaic performance of AZO/ZnO/CdS/CZTSSe/PbS/Mo was studied by changing the parameters of the CZTSSe absorption layer and PbS layer. Studies have shown that the efficiency can be increased to 20.86% after using PbS.

关键词：

Improved model for defect detection in photovoltaic cells based on yolov5

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Optoelectronics letters 2025年

作者： BAI Xinfeng xue yuming DAI Hongli WANG luoxin BAI Xin HU Xiaofeng Institute of New Energy Intelligence Equipment， School of Integrated Circuit Science and Engineering， Tianjin University of Technology

In order to meet the requirements of recognition speed and accuracy for complex photovoltaic (PV) cell defect detection tasks， this paper proposed an improvement strategy based on the yolov5 network model. First， the model's ability to localize defects was enhanced by adding shallow feature inputs to strengthen the model's fusion of shallow feature information; second， the Squeeze-and-excitation (SE) attention mechanism was introduced to expand the receptive field and strengthen the dependency between feature channels; finally， a smoothing downsampling module was constructed to replace the convolutional sampling， which reduced the loss of information while retaining the important features. The experimental results show that the yolov5 model based on this improved strategy achieved an average accuracy of 92.06% in the multiclassification defect detection task， and the average recognition speed reached 25.31 frames per second (FPS)， which took into account the requirements of performance and real-time performance， and can satisfy the needs of PV cell defect detection in industrial scenarios.

关键词：

High-quality environmentally friendly photovoltaic CZTSSe thin films prepared by Mg doping

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Optoelectronics letters 2025年

作者： Zhang Zihe xue yuming Dai Hongli Wang luoxin Bai Xin Hu Xiaofeng Institute of New Energy Intelligence Equipment， School of Integrated Circuit Science and Engineering， Tianjin University of Technology

CZTSSe thin films were prepared using the sol-gel method， and the crystal morphology of the CZTSSe films were improved by Mg doping. The prepared films were characterized using techniques such as XRD， Raman spectroscopy， SEM， and UV-Vis spectroscopy. The results showed that Mg replaced Zn in the CZTSSe lattice， forming the CMZTSSe phase. As the Mg doping concentration increased， the grain size initially increased and then decreased. After Mg doping， no additional impurities are *** the Mg doping concentration was 0.1， the film exhibited the optimal crystal morphology， narrowest peak width， largest grain size， the best light absorption properties smoothest and most compact surface， which is favorable for use as an absorber layer in solar cells.

关键词：

The effects of selenization conditions on the microstructure and optoelectronic properties of CZTSSe absorber layers prepared by the sol-gel method

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Optoelectronics letters 2025年

作者： BAI Xin xue yuming DAI Hongli WANG luoxin BAI Xinfeng HU Xiaofeng Institute of New Energy Intelligence Equipment， School of Integrated Circuit Science and Engineering， Tianjin University of Technology

Cu2ZnSnSSe4（CZTSSe） thin film solar cells， with adjustable bandgap and rich elemental content， hold promise in next-gen photovoltaics. Crystalline quality is pivotal for efficient light absorption and carrier transport. During the post-selenization process， understanding crystal growth mechanisms， and improving layer quality are essential. We explored the effects of ramp rate and annealing temperature on CZTSSe films， using XRD， Raman， SEM， and UV-Vis. The optimal performance occurred at 25.25 ℃/min ramp rate and 530℃ annealing. This led to smoother surfaces， higher density， and larger grains. This condition produced a single-layer structure with large grains， no secondary phases， and a 1.14 eV bandgap， making it promising for photovoltaic applications. The study has highlighted the effect of selenization conditions on the characteristics of the CZTSSe absorber layer and has provided valuable information for developing CZTSSe thin film solar cells.

关键词：

High-precision magnetic field measurement system based on a coherent population trapping magnetometer onboard the SATech-01 satellite

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Science China Technological Sciences 2025年

作者： Hongbo xue Wei SONG Haoran ZHAO yiteng ZHANG Shanzhi yE Jindong WANG Ran TAO Peng SANG Keli CHEN Xingzi BI Bingjun CHENG Bin ZHOU yongliang xue yingying TANG liu lIU Jinsong lI Xiaocheng ZHU Baoquan lI Jinguo lIU Wen CHEN Xiaofeng ZHANG yonghe ZHANG lei lI State Key laboratory of Space Weather National Space Science Center Chinese Academy of Sciences Key laboratory of Solar Activity and Space Weather National Space Science Center Chinese Academy of Sciences Key laboratory of Electronics and Information Technology for Space Systems National Space Science Center Chinese Academy of Sciences State Key laboratory of Robotics Shenyang Institute of Automation Chinese Academy of Sciences Innovation Academy for Microsatellites Chinese Academy of Sciences

On July 27, 2022, a high-precision system for measuring the magnetic field based on a coherent population trapping magnetometer（referred to as the CPT system） was launched onboard the Space Advanced Technology demonstration satellite（SATech-01） by a ZK-1A rocket. The payload comprises a scalar coherent population trapping magnetometer（CPTM）, triaxial anisotropic magnetoresistance magnetometer（AMRM）, and nano star tracker mounted on a non-magnetic telescopic tubular mast. This configuration enables synchronized measurement of scalar and vector geomagnetic fields, as well as the attitude,making the payload with its compact sensors suitable for applications on miniature satellite platforms. On November 7, 2022,the novel telescopic tubular mast was deployed in orbit, extending to a length of 5.28 m. The CPTM, an absolute scalar magnetometer with an omnidirectional sensor, is the first China-developed quantum/atomic magnetometer successfully operating in space. In orbit, the CPTM has sensitivity of ～10 pT/Hz1/2and can automatically operate under complex magnetic field variations. The difference between the scalar fields obtained using the CPTM and CHAOS model has a mean deviation of–3.73 n T and a standard deviation of 26.11 nT（1σ）, without on-orbit calibration or correction. The miniaturized AMRM has a sensitivity of ～0.3 n T/Hz1/2and maintains stable and reliable operation in orbit. The low-power and miniaturized nano star tracker has a measurement uncertainty of 14.23″（1σ） in orbit. The mission has realized the on-orbit technical verification of the integrated and synchronized detection of the vector magnetic field and attitude and fully validated the system's performance,automation level, and reliability.

关键词：

卵黄高磷蛋白α-淀粉酶抑制肽的制备、鉴定及酶抑制动力学分析

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

食品工业科技 2025年第1期46卷 152-162页

作者：薛天睿吕彬斐张铭冉李灿张晓维天津科技大学食品科学与工程学院天津300457

为探索卵黄高磷蛋白肽(phosvitin phosphopeptide,PPP)对α-淀粉酶的抑制作用,使其能够调控血糖水平从而缓解Ⅱ型糖尿病,本研究以α-淀粉酶抑制率为指标酶解卵黄高磷蛋白制备PPP,利用酶抑制动力学实验分析PPP对α-淀粉酶的抑制类型,采... 详细信息

为探索卵黄高磷蛋白肽(phosvitin phosphopeptide,PPP)对α-淀粉酶的抑制作用,使其能够调控血糖水平从而缓解Ⅱ型糖尿病,本研究以α-淀粉酶抑制率为指标酶解卵黄高磷蛋白制备PPP,利用酶抑制动力学实验分析PPP对α-淀粉酶的抑制类型,采用液质联用鉴定后用分子对接筛选出高活性的α-淀粉酶抑制肽,最后验证其活性。结果表明,最优酶解条件为先经胰蛋白酶(加酶量7000 U/g)再经胃蛋白酶(加酶量60000 U/g)分别酶解6 h,制得的PPP在浓度7.81×10-3 mg/ml时具有最高α-淀粉酶抑制率70.69%±1.71%。PPP对α-淀粉酶的抑制类型为混合型抑制。鉴定筛选出了两种新型的高活性α-淀粉酶抑制肽FGTEPDAK和IWGR,经验证其IC50值分别为(0.80±0.14)×10-3 mg/ml和(1.80±0.31)×10-3 mg/ml,极显著低于阳性对照阿卡波糖(3.17±0.47)×10-3 mg/ml(P<0.01)。本研究揭示PPP可作为新型降糖物质,应用于缓解Ⅱ型糖尿病的功能性食品开发中。

关键词：卵黄高磷蛋白肽复合酶解 α-淀粉酶抑制剂分子对接酶抑制动力学

维普期刊数据库博看期刊