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Recent progress in defect engineering for kesterite solar cells

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Science China(Physics,Mechanics & Astronomy) 2023年第1期66卷 18-33页

作者： Kaiwen Sun Jialiang Huang Jianjun Li Chang Yan xiaojing hao Australian Centre for Advanced Photovoltaics School of Photovoltaic and Renewable Energy EngineeringUniversity of New South WalesSydney 2033Australia

Kesterite Cu_(2)ZnSn(S,Se)_(4)(CZTSSe)thin film solar cells have been regarded as one of the most promising thin film photovoltaic technologies,offering a low-cost and environmentally friendly solar energy *** remarkable advances have been achieved in kesterite solar cells,the performance gap relative to mature thin film photovoltaic technologies such as CIGSe and Cd Te remains *** open-circuit voltage(V_(OC))deficit has been recognized as the main limiting factor to performance improvement,with undesirable intrinsic defects being a key culprit contributing to the low V_(OC).To realize the promise inherent in kesterite CZTS to become an earth-abundant alternative to existing thin film photovoltaic technologies with comparable performance,significant research effort has been invested to tackle the challenging defect *** this review,recent progress and achievements relevant to engineering improvements to the defect properties of the semiconductor have been examined and *** strategies include:(i)manipulating the synthesis process to obtain a desirable reaction pathway and chemical environment;(ii)introducing cation substitution to increase the ionic size difference and supress the related band tailing deep-level defects;(iii)applying post deposition treatment(PDT)with alkaline elements to passivate the detrimental *** advances obtained from work on kesterite solar cells may lead to future high performance from this material and may be further extended to other earth-abundant chalcogenide photovoltaic technologies.

关键词： thin film solar cells kesterite solar cells Cu_(2)ZnSn(S,Se)_(4)(CZTSSe,CZTS) defect engineering

Machine-learning based ocean atmospheric duct forecasting:a hybrid model-data-driven approach

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The Journal of China Universities of Posts and Telecommunications 2023年第4期30卷 1-9页

作者： Feng Yuting Gong haobing hao xiaojing Gao Hui Guo Xiangming Key Laboratory of Trustworthy Distributed Computing and Service Beijing University of Posts and TelecommunicationsBeijing 100876China Key Laboratory of Radio Wave Propagation Characteristics and Modeling Technology 22nd Research Institute of China Electronics Technology CorporationQingdao 266107China

The atmospheric duct is a vital radio wave *** methods of forecasting the atmospheric duct mainly include statistical analysis based on sounding observation data and mesoscale numerical model-based *** former can provide accurate duct information but is highly dependent on the acquisition of data *** latter is more practical but still lacks *** paper introduces machine learning to establish a novel meteorological parameter correction model for atmospheric duct *** detail,using the weather research and forecasting(WRF)model data and spatiotemporal characteristics as input,sounding data as label and extreme gradient boosting(XGBoost)model for training,the meteorological parameter correction effect is the best,i.e.,the accuracy of forecast meteorological parameters is improved by about 65.4%.Combining the mapping relationship between meteorological parameters and corrected atmospheric refractive index(CARI),and the transition mechanism of CARI to duct parameters,a new duct forecasting mechanism is *** to the high efficiency of numerical model and the accuracy of sounding data,the new duct forecasting mechanism has excellent *** comparing the duct forecasting results,the forecasting accuracy of the new duct forecasting model is significantly higher than that of the mesoscale model.

关键词： marine atmospheric duct neural network fitting machine learning forecasting mechanism

Interface engineering of p-n heterojunction for kesterite photovoltaics:A progress review

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Journal of Energy Chemistry 2021年第9期30卷 1-8页

作者： Mingrui He Kaiwen Sun Mahesh P.Suryawanshi Jianjun Li xiaojing hao School of Photovoltaic and Renewable Energy Engineering University of New South WalesSydneyNSW 2052Australia

Kesterite Cu_(2)ZnSn(S,Se)_4(CZTSSe)is considered one or the most promising thin-film photovoltaic(PV)technologies due to its bandgap tunability(1.0~1.5 eV)and high absorption coefficient(>10^(4)cm^(-1)).However,the highest power conversion efficiency(PCE)of CZTSSe has so far only reached up to 12.6%,much lower than the theoretical limit defined by the Shockley-Queisser(SQ)*** large opencircuit voltage(V_(oc))deficit and inferior fill factor(FF)are prevalent in kesterite PV and hamper the improvement in *** this review,unfavourable energy band alignment at the CZTSSe/buffer junction,as well as defective interface are identified as two obstacles at the p-n *** issues contribute to the interface induced recombination,thus significantly reducing ***,we review recent advances in strategies to improve the efficiency by altering the characteristics of the interface,covering alternative buffer layers,heterojunction treatments and passivation ***,future research directions of heterojunction engineering are proposed as schemes towards the ideal interface in kesterite solar cells.

关键词： Kesterite Thin film Solar cell Heterojunction Interface

血清涎液化糖链抗原-6、分泌性磷蛋白1与肺炎支原体肺炎患儿病情程度相关性及联合预测预后的价值

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陕西医学杂志 2025年第3期54卷 333-337页

作者：王丽丽王佳郝晓静河北省人民医院儿科河北石家庄050051

目的:探究血清涎液化糖链抗原-6(KL-6)、分泌性磷蛋白1(SPP1)与肺炎支原体肺炎(MPP)患儿病情程度的相关性及联合预测预后的价值。方法:选取MPP患儿190例,根据病情程度分为轻症组(99例)和重症组(91例)。另选体检健康儿童95例为对照组。... 详细信息

目的:探究血清涎液化糖链抗原-6(KL-6)、分泌性磷蛋白1(SPP1)与肺炎支原体肺炎(MPP)患儿病情程度的相关性及联合预测预后的价值。方法:选取MPP患儿190例,根据病情程度分为轻症组(99例)和重症组(91例)。另选体检健康儿童95例为对照组。比较三组一般资料及血清KL-6、SPP1水平,分析MPP患儿入院时血清KL-6、SPP1水平及病情程度间的相关性。根据MPP患儿28 d预后情况分为预后良好组(129例)和预后不良组(61例),比较两组临床资料及生化指标,分析MPP患儿预后的影响因素及血清KL-6、SPP1对MPP患儿预后不良的预测价值。结果:重症组入院时血清KL-6、SPP1水平高于轻症组和对照组,且轻症组高于对照组(均P<0.05)。MPP患儿入院时血清KL-6、SPP1水平与病情程度呈正相关,且血清KL-6与SPP1呈正相关(均P<0.05)。患病至治疗时间、入院时病情程度、肺炎严重指数(PSI)评分及血清KL-6、SPP1水平为MPP患儿预后的危险因素,第1秒用力呼气肺活量(FEV1)/用力肺活量(FVC)是保护因素(均P<0.05)。入院时血清KL-6、SPP1单独预测MPP患儿预后不良的曲线下面积(AUC)分别为0.717、0.708;常规预测模型(患病至治疗时间、入院时病情程度、FEV1/FVC、PSI评分联合)预测MPP患儿预后不良的AUC为0.845,新预测模型(常规预测模型联合入院时血清KL-6、SPP1)预测MPP患儿预后不良的AUC为0.912,新预测模型的AUC明显大于常规预测模型的AUC(P<0.05)。结论:入院时血清KL-6、SPP1水平与MPP患儿病情程度呈正相关,且在预测患儿预后不良方面具有一定价值,与预后不良的常规影响因素联合能为临床预测预后不良高危患儿提供可靠临床依据。

关键词：肺炎支原体肺炎涎液化糖链抗原-6 分泌性磷蛋白1 病情程度预后预测

Emergence of flexible kesterite solar cells:progress and perspectives

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npj Flexible Electronics 2023年第1期7卷 398-412页

作者： Jianjun Li Kaiwen Sun Xiaojie Yuan Jialiang Huang Martin A.Green xiaojing hao Australian Centre for Advanced Photovoltaics School of Photovoltaic and Renewable Energy EngineeringUniversity of New South WalesSydneyNSW 2052Australia

Flexible photovoltaics have been and will be increasingly in demand in modern and future society in various *** for ideal flexible photovoltaic technologies that can perfectly meet these expanding demands has long been an active branch of photovoltaic *** kesterite Cu_(2)ZnSn(S,Se)_(4)(CZTSSe)has emerged in recent years owning to its great potential to be an abundant,low-cost,stable,and high-efficiency‘green’photovoltaic material that can be widely deployed with the lowest detrimental environmental ***,we review the recent progress with flexible kesterite solar cells in thin-film and monograin technologies,discuss the key challenges and strategies associated with the flexible substrates,and finally provide the future perspectives on further pushing the efficiency toward commercial-competitive levels.

关键词： finally competitive flexible

Recent advances on interface engineering of perovskite solar cells

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Nano Research 2022年第1期15卷 85-103页

作者： Wenjing Yu Xiaoran Sun Mu Xiao Tian Hou Xu Liu Bolin Zheng Hua Yu Meng Zhang Yuelong Huang xiaojing hao Institute of Photovoltaics Southwest Petroleum UniversityChengdu 610500China Nanomaterials Centre Australian Institute for Bioengineering and NanotechnologyThe University of QueenslandSt LuciaBrisbaneQLD4072 Australia The Australian Centre for Advanced Photovoltaics School of Photovoltaic and Renewable Energy EngineeringUniversity of New South WalesSydneyNSW 2052Australia

Lead halide perovskite solar cells(PSCs)have been rapidly developed in the past *** to its excellent power conversion efficiency with robust and low-cost fabrication,perovskite quickly becomes one of the most promising candidates for the next-generation photovoltaic *** the development of PSCs,the interface engineering has witnessed its increasingly critical role in maximizing the device performance as well as the long-term stability,because the interfaces in PSCs are closely correlated with the defect management,carrier dynamics and surface *** review focuses on interfacial modification between the perovskite active layer and the charge transport layer,as well as the recent advances on high-efficiency and stable PSCs driven by interface engineering *** contributing roles of interface engineering in terms of defect passivation,inhibiting ion migration,optimization of energy band alignment and morphological control are ***,based on the latest progress and advances,strategies and opportunities for the future research on interface engineering for PSCs are proposed to promote the development of perovskite photovoltaic technology.

关键词： perovskite solar cells interface engineering defects passivation band-level alignment

High-efficiency ultra-thin Cu_(2)ZnSnS_(4) solar cells by double-pressure sputtering with spark plasma sintered quaternary target

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Journal of Energy Chemistry 2021年第10期30卷 186-194,I0006页

作者： Ping Fan Zhigao Xie Guangxing Liang Muhammad Ishaq Shuo Chen Zhuanghao Zheng Chang Yan Jialiang Huang xiaojing hao Yi Zhang Zhenghua Su Shenzhen Key Laboratory of Advanced Thin Films and Applications College of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhen 518060GuangdongChina School of Photovoltaic and Renewable Energy Engineering UNSWSydneyNSW 2052Australia Institute of Photoelectronic Thin Film Devices and Technology and Tianjin Key Laboratory of Thin Film Devices and Technology Nankai UniversityTianjin 300350China

In recent years,Cu_(2)ZnSnS_(4)(CZTS)semiconductor materials have received intensive attention in the field of thin-film solar cells owing to its non-toxic and low-cost *** this work,double-pressure sputtering technology is applied to obtain highly efficient and ultra-thin(-450 nm)pure Cu_(2)ZnSnS_(4)(CZTS)solar *** mixed materials with sulfides and copper powder as a quaternary target via spark plasma sintering(SPS)method and adopting double-layer sputtering(high+low pressure),a highly adhesive and large-grained CZTS thin film is *** a result,the damage to the surface of Mo contact is decreased so that the reflectivity of incident light can be ***,the composition of CZTS film was more uniform and the secondary phase separation at the Mo interface was ***,the interface defect state and deep level defect density in corresponding device with double-pressure is reduced and the ratio of depletion thickness to absorption layer thickness can reached to 0.58,which promoted the collection of photogenerated ***,an efficiency of 9.3%for ultra-thin(~450 nm)CZTS film solar cell is obtained.

关键词： CZTS Ultra-thin Solar cell SPS Sputtering

Over 12%efficient kesterite solar cell via back interface engineering

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Journal of Energy Chemistry 2022年第12期75卷 321-329,I0008页

作者： Yunhai Zhao Zixuan Yu Juguang Hu Zhuanghao Zheng Hongli Ma Kaiwen Sun xiaojing hao Guangxing Liang Ping Fan Xianghua Zhang Zhenghua Su Shenzhen Key Laboratory of Advanced Thin Films and Applications Key Laboratory of Optoelectronic Devices and SystemsCollege of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhen 518060GuangdongChina CNRS ISCR(Institut des Sciences Chimiques de Rennes)UMR 6226Univ RennesRennes F-35000France School of Photovoltaic and Renewable Energy Engineering UNSW SydneySydney NSW 2052Australia Shenzhen University Institute of Microscale Optoelectronics Shenzhen UniversityShenzhen 518060GuangdongChina

Kesterite Cu_(2)ZnSn(S,Se)_(4)(CZTSSe)has attracted considerable attention as a non-toxic and earthabundant solar cell *** selenization of CZTSSe film at high temperature,the reaction between CZTSSe and Mo is one of the main reasons that result in unfavorable absorber and interface quality,which leads to large open circuit voltage deficit(VOC-def)and low fill factor(FF).Herein,a WO_(3)intermediate layer introduced at the back interface can effectually inhibit the unfavorable interface reaction between absorber and back electrode in the preliminary selenization progress;thus high-quality crystals are *** this back interface engineering,the traditional problems of phase segregation,voids in the absorber and over thick Mo(S,Se)_(2)at the back interface can be well solved,which greatly lessens the recombination in the bulk and at the *** increased minority carrier diffusion length,decreased barrier height at back interface contact and reduced deep acceptor defects give rise to systematic improvement in VOCand FF,finally a 12.66%conversion efficiency for CZTSSe solar cell has been *** work provides a simple way to fabricate highly efficient solar cells and promotes a deeper understanding of the function of intermediate layer at back interface in kesterite-based solar cells.

关键词： Cu_(2)ZnSn(S Se)_(4) WO_(3)intermediate layer Crystal growth Minority carrier diffusion length Interface contact quality

Neonate - primed CD8^＋ Memory Cells Rival Adult- primed Memory Cells in Antigendriven Expansion and Anti - viral Protection

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美国中华健康卫生杂志 2005年第4期8卷 12-30页

作者： CAO Shui LI xiaojing REN Xiubao hao Xishan Tianjin Cancer Hospital and Institute Tianjin Medical University Tianjin 300070 China