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Highly ordered crystallization of α-FAPbl_(3) films via homogeneous seeds for efficient perovskite solar cells

Journal of Energy Chemistry 2024年第7期94卷 625-634页

作者： Guohui Luo Linfeng Zhang Liyun Guo Xiuhong Geng Penghui Ren Yi Zhang Haihua Hu Xiaoping Wu Lingbo Xu Ping Lin Haiyan He xuegong yu Peng Wang Can Cui Key Laboratory of Optical Field Manipulation of Zhejiang Province Department of PhysicsZhejiang Sci-Tech UniversityHangzhou 310018ZhejiangChina Zhejiang Provincial Key Laboratory of Fiber Materials and Manufacturing Technology Zhejiang Sci-Tech UniversityHangzhou 310018ZhejiangChina Hangzhou City University Hangzhou 310015ZhejiangChina Key Laboratory of Solar Energy Utilization and Energy Saving Technology of Zhejiang Province Zhejiang Baima Lake Laboratory Co.Ltd.Hangzhou 310012ZhejiangChina State Key Laboratory of Silicon Materials and School of Materials Science and Engineering Zhejiang UniversityHangzhou 310027ZhejiangChina

Formamidine lead triiodide(FAPbI_(3))perovskites have become the most promising photovoltaic materials for perovskite solar cells with record power conversion efficiency(PCE).However,random nucleation,phase transition,and lattice defects are still the key challenges limiting the quality of FAPbI_(3) *** studies show that the introduction or adding of seeds in the precursor is effective to promote the nucleation and crystallization of perovskite ***,the seed-assisted approach focuses on heterogeneous seeds or hetero-composites,which inevitably induce a lattice-mismatch,the genera-tion of strain or defects,and the phase segregation in the perovskite ***,we first demonstrate that high-quality perovskite films are controllably prepared using α-and δ-phases mixed FAPbI_(3) micro-crystal as the homogeneous seeds with the one-step antisolvent *** partially dissolved seeds with suitable sizes improve the crystallinity of the perovskite flm with preferable orientation,improved carrier lifetime,and increased carrier *** importantly,the α-phase-containing seeds promote the formation of α-phase FAPbI_(3) films,leading to the reduction of residual lattice strain and the suppres-sion of I-ion ***,the adding of dimethyl 2,6-pyridine dicarboxylate(DPD)into the pre-cursor further suppresses the generation of defects,contributing to the PCE of devices prepared in air ambient being significantly improved to 23.75%,among the highest PCEs for fully air-processed FAPbI_(3) solar *** unpackaged target devices possess a high stability,maintaining 80%of the initial PCE under simulated solar illumination exceeding 800 h.

关键词： Perovskite solar cells FAPbI_(3) Homogeneous seeds Strain Phase stability

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High-performance carbon-electrode-based self-powered optoelectronic synaptic devices

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Science China(Information Sciences) 2024年第5期67卷 339-340页

作者： Wen HUANG Xuwen XIA Huixing ZHANG Tenglong GUO Pengjie HANG Bin LI Jiawei TANG Biao LI Chen ZHU Lei WANG Deren YANG xuegong yu Xing'ao LI Jiangsu Provincial Engineering Research Center of Low Dimensional Physics and New Energy & School of Science Nanjing University of Posts and Telecommunications College of Integrated Circuit Science and Engineering Nanjing University of Posts and Telecommunications State Key Laboratory of Silicon and Advanced Semiconductor Materials Zhejiang University

A two-terminal self-powered optoelectronic structure could mimic synaptic functions of a human brain synapse unit(Figure 1(a)) based on the photovoltaic effects [1], demonstrating the potential for decreasing energy consumption for future computing. However, current self-powered optoelectronic synaptic devices face issues of stability and cost,which mainly arise from noble metal electrodes and independent hole transport layers used in these structures. Substituting low-cost carbon for these metal electrodes and carrier transport layers may promise to solve these challenges.

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Self-rectifying-based memristors for neuromorphic computing

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Science Bulletin 2022年第12期67卷 1213-1216页

作者： Wen Huang Pengjie Hang Deren Yang xuegong yu Xing’ao Li New Energy Technology Engineering Laboratory of Jiangsu Province School of ScienceNanjing University of Posts and TelecommunicationsNanjing 210023China State Key Laboratory of Silicon Materials Zhejiang UniversityHangzhou 310027China School of Science Zhejiang University of Science&TechnologyHangzhou 310027China

Considering the challenges arising from the von Neumann bottleneck and the end of Moore’s law,people have been seeking for new ways for future computing[1].The human brain is a highly parallel and low-energy-consumpt... 详细信息

关键词：类脑计算忆阻器整流效应

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Bioinspired molecules design for bilateral synergistic passivation in buried interfaces of planar perovskite solar cells

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Nano Research 2022年第2期15卷 1069-1078页

作者： Bin Wang Junjie Ma Zehua Li Gangshu Chen Qiang Gu Shuyao Chen Yiqiang Zhang Yanlin Song Jingbo Chen Xiaodong Pi xuegong yu Deren Yang School of Materials Science and Engineering Henan Institute of Advanced TechnologyZhengzhou UniversityZhengzhou 450001China Key Laboratory of Green Printing Institute of ChemistryChinese Academy of Sciences100190 BeijingChina State Key Laboratory of Silicon Materials&School of Materials Science and Engineering Zhejiang UniversityHangzhou 310027China

Trap-mediated energy loss in the buried interface with non-exposed feature constitutes one of the serious challenges for achieving high-performance perovskite solar cells(PSCs).Inspired by the adhesion mechanism of mussels,herein,three catechol derivatives with functional Lewis base groups,namely 3,4-Dihydroxyphenylalanine(DOPA),3,4-Dihydroxyphenethylamine(DA)and 3-(3,4-Dihydroxyphenyl)propionic acid(DPPA),were strategically *** molecules as interfacial linkers are incorporated into the buried interface between perovskite and SnO_(2) surface,achieving bilateral synergetic passivation *** crosslinking can produce secondary bonding with the undercoordinated Pb^(2+) and Sn^(4+) *** PSCs treated with DOPA exhibited the best performance and operational *** the DOPA passivation,a stabilized power conversion efficiency(PCE)of 21.5%was demonstrated for the planar *** 55 days of room-temperature storage,the unencapsulated devices with the DOPA crosslinker could still maintain 85%of their initial performance in air under relative humidity of-15%.This work opens up a new strategy for passivating the buried interfaces of perovskite photovoltaics and also provides important insights into designing defect passivation agents for other perovskite optoelectronic devices,such as light-emitting diodes,photodetectors,and lasers.

关键词： perovskite solar cells bioinspired bilateral passivation buried interfaces catechol derivatives

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Light-Emitting Artificial Synapses for Neuromorphic Computing

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Research 2023年第2期2022卷 213-218页

作者： Chen Zhu Wen Huang Wei Li xuegong yu Xing'ao Li Collge of Integrated Circuit Science and Engineering Nanjing University of Posts and TelecommunicationsNanjing210023China New Energy Technology Engineering Laboratory of Jiangsu Province School of Science Nanjing University of Posts and TelecommunicationsNanjing 210023China State Key Laboratory of Silicon Materials Zhejiang UniversityHangzhou 310027China College of Electronic and Optical Engineering College of Flexible Electronics(Future Technology) Nanjing University of Posts and TelecommunicationsNanjing 210023China

As the key connecting points in the neuromorphic computing systems,synaptic devices have been investigated substantially in recent *** optoelectronic synaptic devices with optical outputs is becoming attractive due to... 详细信息

关键词： computing connecting attractive

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Visible-blind short-wavelength infrared photodetector with high responsivity based on hyperdoped silicon

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Photonics Research 2019年第3期7卷 351-358页

作者： XIAODONG QIU ZIJING WANG XIAOTONG HOU xuegong yu DEREN YANG State Key Laboratory of Silicon Materials and School of Materials Science and Engineering Zhejiang University

Developing a low-cost, room-temperature operated and complementary metal-oxide-semiconductor(CMOS)compatible visible-blind short-wavelength infrared(SWIR) silicon photodetector is of interest for security,telecommunications, and environmental sensing. Here, we present a silver-supersaturated silicon(Si:Ag)-based photodetector that exhibits a visible-blind and highly enhanced sub-bandgap photoresponse. The visible-blind response is caused by the strong surface-recombination-induced quenching of charge collection for short-wavelength excitation, and the enhanced sub-bandgap response is attributed to the deep-level electrontraps-induced band-bending and two-stage carrier excitation. The responsivity of the Si:Ag photodetector reaches 504 mA · W^(-1) at 1310 nm and 65 m A · W^(-1) at 1550 nm under-3 V bias, which stands on the stage as the highest level in the hyperdoped silicon devices previously reported. The high performance and mechanism understanding clearly demonstrate that the hyperdoped silicon shows great potential for use in optical interconnect and power-monitoring applications.

关键词： Visible-blind short-wavelength infrared photodetector hyperdoped silicon complementary metal-oxide-semiconductor(CMOS)

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Light soaking-induced performance enhancement in a-Si:H/c-Si heterojunction solar cells

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Science China Materials 2022年第12期65卷 3513-3517页

作者： Qiyuan He Zechen Hu xuegong yu Pengjie Hang Lihui Song Dehang Lin Lifei Yang Deren Yang State Key Lab of Silicon Materials and School of Materials Science&Engineering Zhejiang UniversityHangzhou 310027China Hangzhou Global Scientific and Technological Innovation Center Zhejiang UniversityHangzhou 311200China SuZhou GH New Energy Tech.Co. Ltd.Suzhou 215128China

demonstrated to hydrogenate dangling bonds on the surface of crystalline silicon(c-Si),which reduces the interface defect density,thus enabling an outstanding passivation effect[1–3].However,like many other industrial c-Si solar cells that suffer from light-induced degradation and light and elevated temperature induced degradation(LeTID)[4,5],the decay of electrical properties has also been found in thin-film a-Si:H solar cells[6–8],as well as samples of c-Si coated with intrinsic a-Si:H films after light soaking[9].A significant observation reported by Plagwitz et al.[10]suggested that illumination induced an increase in surface recombination velocities for both a-Si:H coated p-type and n-type c-Si *** degradation of performance is generally attributed to the generation of deeplevel defects acting as recombination centers,most likely as single dangling bonds[11,12],which is considered to be related to the Staebler-Wronski effect(SWE)[13].

关键词：非晶硅太阳电池饱和电流表面钝化稳定性测试阿伦尼乌斯光伏产业少子寿命

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An industrial solution to light-induced degradation of crystalline silicon solar cells

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Frontiers in Energy 2017年第1期11卷 67-71页

作者： Meng XIE Changrui REN Liming FU Xiaodong QIU xuegong yu Deren YANG State Key Lab of Silicon Materials and School of Materials Science andEngineering Zhejiang University Hangzhou 310027 China Changzhou Shichuang Energy Technology Co. Ltd Liyang 213300 China

Boron-oxygen defects can cause serious lightinduced degradation （LID） of commercial solar cells based on the boron-doped crystalline silicon （c-Si）, which are formed under the injection of excess carriers induced either by illumination or applying forward bias. In this contribution, we have demonstrated that the passivation process of boron-oxygen defects can be induced by applying forward bias for a large quantity of solar cells, which is much more economic than light illumination. We have used this strategy to trigger the passivation process of batches of aluminum back surface field （A1-BSF） solar cells and passivated emitter and rear contact （PERC） solar cells. Both kinds of the treated solar cells show high stability in efficiency and suffer from very little LID under further illumination at room temperature. This technology is of significance for the suppression of LID of c-Si solar cells for the industrial manufacture.

关键词： Boron-oxygen defects c-Si solar cells lightinduced degradation passivation forward bias

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Dynamic photoelectrical regulation of ECM protein and cellular behaviors

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Bioactive Materials 2023年第4期22卷 168-179页

作者： Xiaozhao Wang Cai Yao Xudong Yao Junxin Lin Rui Li Kun Huang Weiming Lin Xiaojun Long Chao Dai Jiajun Dong xuegong yu a Wenwen Huang Wenjian Weng Qi Wang Hongwei Ouyang Kui Cheng School of Materials Science and Engineering State Key Laboratory of Silicon MaterialsCyrus Tang Center for Sensor Materials and ApplicationsZhejiang UniversityHangzhou310027China Dr.Li Dak Sum&Yip Yio Chin Center for Stem Cells and Regenerative Medicine Department of Orthopedic Surgery of the Second Affiliated HospitalZhejiang University School of MedicineHangzhou310058China Department of Sports Medicine Zhejiang University School of MedicineHangzhou310058China Zhejiang University-University of Edinburgh Institute Zhejiang University School of MedicineKey Laboratory of Tissue Engineering and Regenerative Medicine of Zhejiang ProvinceZhejiang University School of MedicineHangzhou314400China China Orthopedic Regenerative Medicine Group(CORMed) Hangzhou310058China School of Chemistry Zhejiang UniversityHangzhou310027China International Institutes of Medicine The Fourth Affiliated HospitalZhejiang University School of MedicineNo.N1Shangcheng AvenueYiwu322000China

Dynamic regulation of cell-extracellular matrix(ECM)-material interactions is crucial for various biomedical *** this study,a light-activated molecular switch for the modulation of cell attachment/detachment behaviors was established on monolayer graphene(Gr)/n-type Silicon substrates(Gr/Si).Initiated by light illumination at the Gr/Si interface,pre-adsorbed proteins(bovine serum albumin,ECM proteins collagen-1,and fibronectin)underwent protonation to achieve negative charge transfer to Gr films(n-doping)throughπ-π*** n-doping process stimulated the conformational switches of ECM *** structural alterations in these ECM interactors significantly reduced the specificity of the cell surface receptor-ligand interaction(e.g.,integrin recognition),leading to dynamic regulation of cell adhesion and eventual cell ***-sequencing results revealed that the detached bone marrow mesenchymal stromal cell sheets from the Gr/Si system manifested regulated immunoregulatory properties and enhanced osteogenic differentiation,implying their potential application in bone tissue *** work not only provides a fast and feasible method for controllable cells/cell sheets harvesting but also gives new insights into the understanding of cell-ECM-material communications.

关键词： Graphene Protein conformational change Charge transfer Cell-materials interaction n-doping

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Technoeconomically competitive four-terminal perovskite/graphenesilicon tandem solar cells with over 20% efficiency

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Journal of Energy Chemistry 2021年第12期30卷 477-483,I0011页

作者： Pengjie Hang Jingkun Cong Ge Li Lijian Zuo Chenxia Kan Biao Li Jiangsheng Xie yuxin Yao Ying Wang Hongzheng Chen Deren Yang xuegong yu State Key Laboratory of Silicon Materials and School of Materials Science and Engineering Zhejiang UniversityHangzhou 310027ZhejiangChina State Key Laboratory of Silicon Materials MOE Key Laboratory of Macromolecular Synthesis and FunctionalizationDepartment of Polymer Science and EngineeringZhejiang UniversityHangzhou 310027ZhejiangChina

Perovskite/Silicon(PS) tandem solar cells have attracted much interest over recent years. However, the most popular crystalline silicon solar cells utilized in tandems require complicated fabrication processes mainly including texturization, diffusion, passivation and metallization, which takes up much cost in photovoltaic market. Here, we report a facile graphene/silicon(Gr/Si) solar cell featuring of lowtemperature( 200 °C) processing and an efficiency of 13.56%. For reducing the heat dissipation loss of high energy photon, the perovskite solar cell(PSC) with a wide band gap of 1.76 e V was adopted as the top cell for the tandem. To reduce the loss of parasitic absorption in hole transport layers(HTLs),thickness of Spiro-OMe TAD is re-optimized by compromising the efficiency and the optical transmittance of the devices. As a result, the semitransparent top perovskite solar cell yields a highest efficiency of13.35%. Furthermore, we firstly achieved a low-temperature-processed four-terminal(4-T) perovskite/graphene-silicon(PGS) heterojunction tandem solar cell with the efficiency of 20.37%. The levelized cost of electricity(LCOE) of PGS 4-T modules were estimated to a competitive price, exhibiting much greater potential for practical application compared to that of PS 4-T modules.

关键词： Perovskite/graphene-silicon tandem sola cells Low temperature Transmittance Technoeconomic competitiveness

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