检索结果-南通市图书馆

Nano Research 2024年第11期17卷 10034-10041页

作者： Jiahao Tang Yifei Wang Hengyang Xiang Run Wang Kun Zhang Xinyi Lv Xinrui Chen Ziqing Xu Zhesheng Chen Lei Wang Aidi Zhang An Xie Haibo Zeng MIIT Key Laboratory of Advanced Display Materials and Devices Institute of Optoelectronics and Nanomaterials College of Materials Science and Engineering Nanjing University of Science and Technology Nanjing 210094 China Wuhan National Laboratory for Optoelectronics Huazhong University of Science and Technology Wuhan 430074 China Engineering Research Center of Functional Polymer Membrane Materials of Jiangsu Province Nanjing Bready Advanced Materials Technology Co. Ltd. Nanjing 211103 China School of Materials Science and Engineering Xiamen University of Technology Xiamen 361024 China

Quasi-two-dimensional perovskite light-emitting diodes (quasi-2D PeLEDs) are emerging as high-potential candidates for new generation of wide-color gamut displays due to their simple, low-cost solution process, and high color purity. However, the luminescence performance of quasi-2D perovskite films is severely limited by dispersed phase distribution and excessive defect density, which are caused by excessive diffusion of nucleation sites during the perovskite growth stage. Here, the benzylphosphonic acid (BPA) molecule, owing to its strong P-O-Pb bond energy sites and strong electronegativity to PEA+, can aggregate lead-halide octahedron to grow high-dimensional phases, avoiding scattered low-dimensional phases (n = 1). The continuous gradient phase distribution will be beneficial to smooth carrier injection and effectively suppress the leakage current in PeLEDs. Meanwhile, the introduction of phosphonic acid groups will fill the vacancies of Pb ions and reduce non-radiative recombination. As a result, the maximum external quantum efficiency (EQE) of PeLEDs can be increased from 8% to 20.6% with a 514 nm light emission and a 21 nm full-width half maximum, and the device lifetime (T 50) is nearly 6-fold of the pristine sample. In addition, this strategy is also suitable for other wavelength. For example, in blue light, performance improvement is also realized that the maximum EQE of 8% and the luminance increased from 1045 to 5264 cd/m2. These results provide a feasible strategy to regulate the phase distribution and passivate the defects of quasi-2D perovskites.

关键词： quasi-2D perovskites light-emitting diodes benzylphosphonic acid phase distribution defect passivation

Heterointerface engineering of perovskite defects and energetics for light-emitting diodes

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

Nano Research 2023年第4期16卷 5525-5532页

作者： Xiaomeng Zhang Lei Shi Junyang Bai Feijiu Wang Maowei Jiang Key Laboratory of Special Functional Materials of Ministry of Education of China School of Materials ScienceHenan UniversityKaifeng 475004China Henan Key Laboratory of Photovoltaic Materials Henan UniversityKaifeng 475004China

Perovskite light-emitting diodes(PeLEDs)rely on optimized device architecture to realize effective electro-optical ***,the stacks of dissimilar semiconducting materials form heterointerfaces,at which the defects and energetics of perovskite film greatly affect the device ***,we focus on the heterointerface engineering of perovskite towards high-quality *** defect engineering at both the bottom-surface(namely buried interface)and top-surface of perovskite film is simultaneously performed by semiconducting passivating molecules,which feature aligned energy levels and superior carrier injection ability regarding to ***,such defect passivation could influence the heterointerface *** perovskite work function is decreased by our suggested passivator treatment because of interface dipole,which results in band bending at the heterojunction and modulates the carrier ***,the electron injection is greatly enhanced,which boosts the up-conversion electroluminescence in current ***,via the heterointerface engineering of defects and energetics synergistically,efficient PeLEDs with 3-fold enhancement of external quantum efficiency and low driving voltages with respect to pristine ones are achieved based on our proposed PeLED architecture.

关键词： heterointerface defect passivation energetics perovskite light-emitting diodes up-conversion electroluminescence

Efficient Semi‑Transparent Wide‑Bandgap Perovskite Solar Cells Enabled by Pure‑Chloride 2D‑Perovskite passivation

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

Nano-Micro Letters 2023年第8期15卷 35-48页

作者： Liu Yang Yongbin Jin Zheng Fang Jinyan Zhang Ziang Nan Lingfang Zheng Huihu Zhuang Qinghua Zeng Kaikai Liu Bingru Deng Huiping Feng Yujie Luo Chengbo Tian Changcai Cui Liqiang Xie Xipeng Xu Zhanhua Wei Xiamen Key Laboratory of Optoelectronic Materials and Advanced Manufacturing Institute of Luminescent Materials and Information DisplaysCollege of Materials Science and EngineeringHuaqiao UniversityXiamen 361021People’s Republic of China MOE Engineering Research Center for Brittle Materials Machining Institute of Manufacturing EngineeringCollege of Mechanical Engineering and AutomationHuaqiao UniversityXiamen 361021People’s Republic of China Gold Stone(Fujian)Energy Company Limited Quanzhou 362005People’s Republic of China Collaborative Innovation Center of Chemistry for Energy Materials Department of ChemistryCollege of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005People’s Republic of China

Wide-bandgap(WBG)perovskite solar cells suffer from severe non-radiative recombination and exhibit relatively large opencircuit voltage(V_(OC))deficits,limiting their photovoltaic ***,we address these issues by in-situ forming a well-defined 2D perovskite(PMA)_(2)PbCl_(4)(phenmethylammonium is referred to as PMA)passivation layer on top of the WBG active *** 2D layer with highly pure dimensionality and halide components is realized by intentionally tailoring the side-chain substituent at the aryl ring of the post-treatment ***-principle calculation and single-crystal X-ray diffraction results reveal that weak intermolecular interactions between bulky PMA cations and relatively low cation-halide hydrogen bonding strength are crucial in forming the well-defined 2D ***(PMA)_(2)PbCl_(4)forms improved type-I energy level alignment with the WBG perovskite,reducing the electron recombination at the perovskite/hole-transport-layer *** this strategy in fabricating semi-transparent WBG perovskite solar cells(indium tin oxide as the back electrode),the V_(OC)deficits can be reduced to 0.49 V,comparable with the reported state-of-the-art WBG perovskite solar cells using metal ***,we obtain hysteresis-free 18.60%-efficient WBG perovskite solar cells with a high V_(OC)of 1.23 V.

关键词： Wide-bandgap perovskite solar cells Transparent back electrodes defect passivation Bulky cations

Stabilizing Buried Interface via Synergistic Effect of Fluorine and Sulfonyl Functional Groups Toward Efficient and Stable Perovskite Solar Cells

在线全文

学校读者我要写书评

暂无评论

Nano-Micro Letters 2023年第2期15卷 32-45页

作者： Cheng Gong Cong Zhang Qixin Zhuang Haiyun Li Hua Yang Jiangzhao Chen Zhigang Zang Key Laboratory of Optoelectronic Technology and Systems(Ministry of Education) Chongqing UniversityChongqing 400044People’s Republic of China Institute of High Energy Physics Chinese Academy of Sciences(CAS)Beijing 100049People’s Republic of China

The interfacial defects and energy barrier are main reasons for interfacial nonradiative *** addition,poor perovskite crystallization and incomplete conversion of PbI_(2) to perovskite restrict further enhancement of the photovoltaic performance of the devices using sequential ***,a buried interface stabilization strategy that relies on the synergy of fluorine(F)and sulfonyl(S=O)functional groups is proposed.A series of potassium salts containing halide and non-halogen anions are employed to modify SnO_(2)/perovskite buried *** chemical bonds including hydrogen bond,coordination bond and ionic bond are realized,which strengthens interfacial contact and defect passivation *** chemical interaction between modification molecules and perovskite along with SnO_(2) heightens incessantly as the number of S=O and F *** chemical interaction strength between modifiers and perovskite as well as SnO_(2) gradually increases with the increase in the number of S=O and *** defect passivation effect is positively correlated with the chemical interaction *** crystallization kinetics is regulated through the compromise between chemical interaction strength and wettability of *** with Cl−,all non-halogen anions perform better in crystallization optimization,energy band regulation and defect *** device with potassium bis(fluorosulfonyl)imide achieves a tempting efficiency of 24.17%.

关键词： Perovskite solar cells Buried interface Multiple chemical bonds Synergistic effect of functional groups defect passivation

Sodium fluoride sacrificing layer concept enables high-efficiency and stable methylammonium lead iodide perovskite solar cells

在线全文

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 2022年第18期113卷 138-146页

作者： Huimin Xiang Pengyun Liu Wei Wang Ran Ran Wei Zhou Zongping Shao College of Chemical Engineering State Key Laboratory of Materials-Oriented Chemical EngineeringNanjing Tech UniversityNanjing 210009China WA School of Mines:Minerals Energy and Chemical Engineering(WASM-MECE)Curtin UniversityPerthWA 6845Australia

As next-generation photovoltaic devices,methylammonium lead iodide(MAPbI_(3))-based organic-inorganic halide perovskite solar cells(PSCs)have received considerable attention because of their cost effectiveness and high ***,their practical applications are retarded due to severe instability under moisture,thermal and sunlight conditions,which are closely related to the insufficient perovskite film quality and high photocatalytic activity of defective TiO_(2) electron-transporting layer(ETL)to accelerate the perovskite ***,remarkably enhanced power conversion efficiency(PCE)and stability of MAPbI_(3)-based PSCs is reached through the use of a new sodium fluoride(NaF)sacrificing layer,which,introduced between the perovskite layer and ETL,is sacrificed during cell fabrication by penetrating into the perovskite layer,improving the perovskite film quality,while partial NaF is incorporated into the mesoporous TiO_(2) ETL during NaF layer fabrication to passivate TiO_(2) and construct a well-matched energy level *** a result,the optimized PSC generates a high PCE of 20.9%,which is 17%higher than that of the pristine cell(17.9%),and outstanding performance stability due to remarkably enhanced moisture,thermal and sunlight *** study highlights a simple and effective approach to boost the PCE and durability of MAPbI 3-based PSCs simultaneously,accelerating the commercialization of this technology.

关键词： Perovskite solar cells Sodium fluoride sacrificing layer defect passivation Stability

Spontaneous decoration of ionic compounds at perovskite interfaces to achieve 23.38% efficiency with 85% fill factor in NiO_X-based perovskite solar cells

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2023年第10期85卷 39-48,I0003页

作者： Geping Qu Deng Wang Xiaoyuan Liu Ying Qiao Danish Khan Yinxin Li Jie Zeng Pengfei Xie Yintai Xu Peide Zhu Limin Huang Yang-Gang Wang Baomin Xu Zong-Xiang Xu School of Chemistry and Chemical Engineering Harbin Institute of TechnologyHarbin 150001HeilongjiangChina Department of Chemistry Southern University of Science and TechnologyShenzhen 518055GuangdongChina Department of Materials Science and Engineering Southern University of Science and TechnologyShenzhen 518055GuangdongChina Department of Materials Science and Engineering City University of Hong KongHong Kong 999077China Guangdong-Hong Kong-Macao Joint Laboratory for Photonic-Thermal-Electrical Energy Materials and Devices Southern University of Science and TechnologyShenzhen 518055GuangdongChina College of New Materials and New Energies Shenzhen Technology UniversityShenzhen 518118GuangdongChina

Inorganic hole transport materials, particularly NiO_X, have shown considerable promise in boosting the efficiency and stability of perovskite solar cells. However, a major barrier to commercialization of NiO_X-based perovskite solar cells with positive-intrinsic-negative architectures is their direct contact with the absorbing layer, which can lead to losses of photovoltage and fill factor. Furthermore, highly positive under-coordinated Ni cations degrade the perovskite at the interface. Here, we address these issues with the use of an ionic compound(QAPyBF_(4)) as an additive to passivate defects throughout the perovskite layer and improve carrier conduction and interactions with under-coordinated Ni cations. Specifically,the highly electronegative inorganic anion [BF_(4)]~- interacts with the NiO_x/perovskite interface to passivate under-coordinated cations(Ni^(≥3+)). Accordingly, the decorated cells achieved a power conversion efficiency of 23.38% and a fill factor of 85.5% without a complex surface treatment or NiO_X doping.

关键词： Perovskite solar cell defect passivation Nickel oxide Heterojunction interface π-Conjugated ionic compound

Additive engineering for stable halide perovskite solar cells

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2021年第9期30卷 599-634页

作者： Carlos Pereyra Haibing Xie Mónica Lira-Cantu Catalan Institute of Nanoscience and Nanotechnology(ICN2) CSIC and the Barcelona Institute of Science and Technology(BIST).Building ICN2Campus UAB E-08193BellaterraBarcelonaSpain

Halide perovskite solar cells(PSCs)have already demonstrated power conversion efficiencies above 25%,which makes them one of the most attractive photovoltaic ***,one of the main bottlenecks towards their commercialization is their long-term stability,which should exceed the 20-year *** engineering is an effective pathway for the enhancement of device *** applied as organic or inorganic compounds,improve crystal grain growth enhancing power conversion *** interaction of their functional groups with the halide perovskite(HP)absorber,as well as with the transport layers,results in defect passivation and ion immobilization improving device performance and *** this review,we briefly summarize the different types of additives recently applied in PSC to enhance not only efficiency but also long-term *** discuss the different mechanism behind additive engineering and the role of the functional groups of these additives for defect *** emphasis is given to their effect on the stability of PSCs under environmental conditions such as humidity,atmosphere,light irradiation(UV,visible)or heat,taking into account the recently reported ISOS *** also discuss the relation between deep-defect passivation,non-radiative recombination and device efficiency,as well as the possible relation between shallow-defect passivation,ion immobilization and device operational ***,insights into the challenge and criteria for additive selection are provided for the further stability enhancement of PSCs.

关键词： Additives Additive engineering Perovskite solar cells defect passivation Shallow defect Deep defect Stability

Multifunctional indaceno[1,2-b:5,6-b']dithiophene chloride molecule for stable high-efficiency perovskite solar cells

在线全文

学校读者我要写书评

暂无评论

Science China Chemistry 2023年第1期66卷 185-194页

作者： Yong Li Qian Zhang Lidan Liu Dapeng Wang Zhike Liu Ningyi Yuan Jianning Ding Qiang Wang Shengzhong(Frank) Liu Key Laboratory of Applied Surface and Colloid Chemistry Ministry of EducationShaanxi Key Laboratory for Advanced Energy DevicesShaanxi Engineering Lab for Advanced Energy TechnologySchool of Materials Science and EngineeringShaanxi Normal UniversityXi'an 710119China Dalian National Laboratory for Clean Energy iChEMDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China School of Materials Science and Engineering Jiangsu Collaborative Innovation Center of Photovoltaic Science and Engineering Jiangsu Province Cultivation Base for State Key Laboratory of Photovoltaic Science and Technology Changzhou UniversityChangzhou 213164China

The additive strategy has emerged as an effective approach to improving the performance of perovskite solar cells(PSCs).Herein,a small acceptor-donor-acceptor type molecule indaceno[1,2-b:5,6-b’]dithiophene chloride(IDT-Cl)is designed and synthesized to advance both the efficiency and stability of FA_(0.85)MA_(0.15)PbI_(3)*** the IDT-Cl molecule,the S-group with high electron density promotes chemical bonding with the lead cations in the perovskite,resulting in enlarged grain size and smoother surface topography of the perovskite *** addition,the undercoordinated lead ions in the perovskite layer may be passivated by the carbonyl group in the 5-chloroindolin-2-one unit,thereby reducing the number of nonradiative recombination ***,the IDT-Cl adjusts the energy level mismatch between the perovskite and two adjacent carrier transport layers,leading to easy charge *** the multifunctional effect of the IDT-Cl molecule,the modified device yields a high power conversion efficiency(PCE)of 24.46%,8.8%higher than that of the control PSC(22.48%).More importantly,the hydrophobic alkyl side-chain of the IDT-Cl molecule further ensures enhanced humidity stability of the perovskite film and environmental,thermal,and light stabilities of the PSC devices.

关键词： non-fullerene multifunctional perovskite solar cell additive defect passivation

Reducing defect of inorganic perovskite film by sulphur-containing Lewis base for robust photodetectors

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2021年第10期30卷 163-169,I0005页

作者： Jian Du Jialong Duan Xiya Yang Qingwei Zhou Yanyan Duan Tingting Zhang Qunwei Tang Institute of New Energy Technology College of Information Science and TechnologyJinan UniversityGuangzhou 510632GuangdongChina State Centre for International Cooperation on Designer Low-Carbon and Environmental Material(SCICDLCEM) School of Materials Science and EngineeringZhengzhou UniversityZhengzhou 450001HenanChina Guangdong Provincial Key Laboratory of Development and Education for Special Needs Children Lingnan Normal UniversityZhanjiang 524048GuangdongChina

Sluggish charge transfer in perovskite film induced by inherent defects such as uncoordinated Pb2+undoubtedly hinders the rapid response of self-powered photovoltaic-typed *** on interaction between Lewis acids and bases,herein,we employ thiourea molecule as a multifunctional Lewis base to significantly improve the quality of all-inorganic CsPbIBr2 perovskite *** careful characterizations,the quality of perovskite film has been well *** from the reduced defect and the reinforced the interfacial charge extraction owing to the strong interaction between uncoordinated Pb2+ions and the-C=S groups in thiourea and the formation of hydrogen bond at perovskite/TiO_(2) interface,an enhanced responsivity of 0.335 A W-1 and specific detectivity of 3.92×10^(12) Jones has been achieved for the self-powered,carbon-electrode based photodetector,which is comparable to the state-of-theart device based on CsPbIBr2 *** importantly,the device free of encapsulation remains 82.8%of initial performance after storage over 56 days in ambient atmosphere,promoting the practical deployment of perovskite products.

关键词： All-inorganic perovskite Self-powered photodetector defect passivation Charge transfer Stability