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Unraveling Passivation Mechanism of Imidazolium-Based Ionic Liquids on inorganic perovskite to Achieve Near-Record-Efficiency CsPbI_(2)Br Solar Cells

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Nano-Micro Letters 2022年第1期14卷 152-166页

作者： Jie Xu Jian Cui Shaomin Yang Yu Han Xi Guo Yuhang Che Dongfang Xu Chenyang Duan Wenjing Zhao Kunpeng Guo Wanli Ma Baomin Xu Jianxi Yao Zhike Liu Shengzhong Liu Key Laboratory of Applied Surface and Colloid Chemistry Ministry of EducationShaanxi Key Laboratory for Advanced Energy Devices/Shaanxi Engineering Lab for Advanced Energy TechnologySchool of Materials Science and EngineeringShaanxi Normal UniversityXi’an 710119People’s Republic of China Dalian Institute of Chemical Physics iChEMUniversity of Chinese Academy of SciencesDalian National Laboratory for Clean EnergyChinese Academy of SciencesDalian 116023People’s Republic of China Ministry of Education Key Laboratory of Interface Science and Engineering in Advanced Materials Research Center of Advanced Materials Science and TechnologyTaiyuan University of TechnologyTaiyuan 030024People’s Republic of China Institute of Functional Nano&Soft Materials Jiangsu Key Laboratory for Carbon-Based Functional Materials&DevicesJoint International Research Laboratory of Carbon-Based Functional Materials and DevicesSoochow UniversitySuzhou 215123People’s Republic of China Department of Materials Science and Engineering and Shenzhen Engineering Research and Development Center for Flexible Solar Cells Southern University of Science and TechnologyShenzhen 518055People’s Republic of China State Key Laboratory of Alternate Electrical Power System With Renewable Energy Sources North China Electric Power UniversityBeijing 102206People’s Republic of China

The application of ionic liquids in perovskite has attracted wide-spread attention for its astounding performance improvement of perovskite solar cells(PSCs).However,the detailed mechanisms behind the improvement remain ***,a series of imidazolium-based ionic liquids(IILs)with different cations and anions is systematically investigated to elucidate the passivation mechanism of IILs on inorganic *** is found that IILs display the following advantages:(1)They form ionic bonds with Cs^(+)and Pb^(2+)cations on the surface and at the grain boundaries of perovskite films,which could effectively heal/reduce the Cs^(+)/I−vacancies and Pb-related defects;(2)They serve as a bridge between the perovskite and the hole-transport-layer for effective charge extraction and transfer;and(3)They increase the hydrophobicity of the perovskite surface to further improve the stability of the CsPbI_(2)Br *** combination of the above effects results in suppressed non-radiative recombination loss in CsPbI_(2)Br PSCs and an impressive power conversion efficiency of 17.02%.Additionally,the CsPbI_(2)Br PSCs with IILs surface modification exhibited improved ambient and light illumination *** results provide guidance for an indepth understanding of the passivation mechanism of IILs in inorganic perovskites.

关键词： Ionic liquids inorganic perovskite Imidazolium Passivation High efficiency

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Suppressed recombination for monolithic inorganic perovskite/silicon tandem solar cells with an approximate efficiency of 23%

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eScience 2022年第3期2卷 339-346页

作者： Sanlong Wang Pengyang Wang Bingbing Chen Renjie Li Ningyu Ren Yucheng Li Biao Shi Qian Huang Ying Zhao Michael Grätzel Xiaodan Zhang Institute of Photoelectronic Thin Film Devices and Technology Renewable Energy Conversion and Storage CenterSolar Energy Conversion CenterNankai UniversityTianjin300350PR China Key Laboratory of Photoelectronic Thin Film Devices and Technology of Tianjin Tianjin300350PR China Haihe Laboratory of Sustainable Chemical Transformations Tianjin300192PR China Engineering Research Center of Thin Film Photoelectronic Technology of Ministry of Education Tianjin300350PR China Collaborative Innovation Center of Chemical Science and Engineering(Tianjin) Tianjin300072PR China Laboratory of Photonics and Interfaces Ecole Polytechnique Federale de LausanneLausanne1015Switzerland

Potentially temperature-resistant inorganic perovskite/silicon tandem solar cells(TSCs)are promising devices for boosting efficiency past the single-junction silicon ***,undesirable non-radiative recombination generally leads to a significant voltage ***,we introduce an effective strategy using nickel iodide,an inorganic halide salt,to passivate iodine vacancies and suppress non-radiative ***_(2)-treated CsPbI_(3-x)Br_(x) inor-ganic perovskite solar cells with a 1.80 eV bandgap exhibited an efficiency of 19.53%and a voltage of 1.36 V,corresponding to a voltage deficit of 0.44 ***,the treated device demonstrated excellent operational stability,maintaining 95.7%of its initial efficiency after maximum power point tracking for 300 h under continuous illumination in a N_(2) *** combining this inorganic perovskite top cell with a narrower bandgap silicon bottom cell,we for the first time achieved monolithic inorganic perovskite/silicon TSCs,which exhibited an effi-ciency of 22.95%with an open-circuit voltage of 2.04 *** work provides a promising strategy for using inorganic passivation materials to achieve efficient and stable solar cells.

关键词： inorganic perovskite Tandem solar cell Recombination Surface passivation

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inorganic Halide perovskite Quantum Dots:A Versatile Nanomaterial Platform for Electronic Applications

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Nano-Micro Letters 2023年第2期15卷 1-31页

作者： Chien‑Yu Huang Hanchen Li Ye Wu Chun‑Ho Lin Xinwei Guan Long Hu Jiyun Kim Xiaoming Zhu Haibo Zeng Tom Wu School of Materials Science and Engineering University of New South WalesSydney 2052Australia MIIT Key Laboratory of Advanced Display Materials and Devices Institute of Optoelectronics and NanomaterialsCollege of Materials Science and EngineeringNanjing University of Science and TechnologyNanjing 210094People’s Republic of China

Metal halide perovskites have generated significant attention in recent years because of their extraordinary physical properties and photovoltaic *** these,inorganic perovskite quantum dots(QDs)stand out for their prominent merits,such as quantum confinement effects,high photoluminescence quantum yield,and defect-tolerant ***,ligand engineering and an all-inorganic composition lead to a robust platform for ambient-stable QD *** review presents the state-of-the-art research progress on inorganic perovskite QDs,emphasizing their electronic *** detail,the physical properties of inorganic perovskite QDs will be introduced first,followed by a discussion of synthesis methods and growth ***,the emerging applications of inorganic perovskite QDs in electronics,including transistors and memories,will be ***,this review will provide an outlook on potential strategies for advancing inorganic perovskite QD technologies.

关键词： inorganic perovskite Quantum dots Electronics Nanocrystals Quantum confinement effects

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inorganic perovskite/organic tandem solar cells with efficiency over 20%

Inorganic perovskite/organic tandem solar cells with efficie...

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第八届新型太阳能材料科学与技术学术研讨会

作者： Ling Liu Zuo Xiao Chuantian Zuo Liming Ding National Center for Nanoscience and Technology

inorganic perovskite solar cells and organic solar cells have received much attention in recent years. But it is becoming harder to improve their power conversion efficiencies(PCEs) due to the wide bandgap of the inorganic perovskites and the relatively high energy loss in organic solar cells. Fabricating tandem cells is an effective way to break their efficiency limits. In this work, we report an inorganic perovskite/organic tandem cell with CsPbI2 Br perovskite front cell and D18:Y6 organic rear cell. The best tandem cell exhibits a PCE of 20.18%, which is much higher than the PCEs of the single-junction CsPbI2 Br cell(14.28%) and D18:Y6 cell(15.23%). Moreover, the PCE of the tandem cell is much higher than the reported organic/organic and inorganic perovskite/organic tandem cells due to the reduced energy loss and the using of high-performance D18:Y6 organic subcell.

关键词： tandem solar cells D18 polymer inorganic perovskite organic solar cells CsPbI2Br

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Europium-Doped CsPbI2Br for Stable and Highly Efficient inorganic perovskite Solar Cells

Europium-Doped CsPbI2Br for Stable and Highly Efficient Inor...

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第六届新型太阳能电池材料科学与技术学术研讨会

作者： Wanchun Xiang Zaiwei Wang Anders Hagfeldt State Key Laboratory of Silicate Materials for Architectures Wuhan University of Technology Laboratory of Photomolecular Science Institute of Chemical Sciences EngineeringEcole Polytechnique Fed rale de ausanne (EPF)

All-inorganic perovskite films hold promise for improving stability of perovskite solar cells(PSCs). However, the 3D α-phase of narrow band gap inorganic perovskites is thermodynamically unstable at room temperature, limiting the development of high performance inorganic PSCs . Here, we show that europium doping of CsPbIBr stabilizes the α-phase of inorganic perovskite at room temperature. We rationalize it by using solid-state nuclear magnetic resonance and high-angle annular dark-field scanning transmission electron microscopy, which show that europium is incorporated as B cation into the perovskite lattice. We demonstrate a maximum power-conversion efficiency of 13.71% for an inorganic PSC with the CsPbEuIBr perovskite and a stable power output of 13.34%. Using electroluminescence we show that incorporation of europium reduces non-radiative recombination by eliminating tail states, resulting in high open-circuit voltage of 1.27 V. The devices retain 93% of the initial efficiency after 370 hours under 100 mW·cm continuous white light illumination under maximum power point tracking measurement.

关键词： inorganic perovskite solar cell open circuit voltage

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Buried interface management via bifunctional NH_(4)BF_(4)towards efficient CsPbI_(2)Br solar cells with a V_(oc)over 1.4 V

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Journal of Energy Chemistry 2024年第2期89卷 364-370,I0009页

作者： Fazheng Qiu Ming-Hua Li Jinpeng Wu Jin-Song Hu School of Materials Science and Engineering NingboTech UniversityNingbo 315100ZhejiangChina Beijing National Laboratory for Molecular Sciences(BNLMS) Institute of ChemistryChinese Academy of SciencesBeijing 100190China College of Chemical Engineering Beijing Advanced Innovation Center for Soft Matter Science and EngineeringBeijing University of Chemical TechnologyBeijing 100029China School of Chemical Sciences University of Chinese Academy of SciencesBeijing 100049China

CsPbI_(2)Br perovskite solar cells(PSCs)have drawn tremendous attention due to their suitable bandgap,excellent photothermal stability,and great potential as an ideal candidate for top cells in tandem solar ***,the abundant defects at the buried interface and perovskite layer induce severe charge recombination,resulting in the open-circuit voltage(V_(oc))output and stability much lower than ***,a novel buried interface management strategy is developed to regulate interfacial carrier dynamics and CsPbI_(2)Br defects by introducing ammonium tetrafluoroborate(NH_(4)BF_(4)),thereby resulting in both high CsPbI_(2)Br crystallization and minimized interfacial energy ***,NH_(4)^(+)ions could preferentially heal hydroxyl groups on the SnO_(2)surface and balance energy level alignment between SnO_(2)and CsPbI_(2)Br,enhancing charge transport efficiency,while BF_(4)^(-)anions as a quasi-halogen regulate crystal growth of CsPbI_(2)Br,thus reducing perovskite ***,it is proved that eliminating hydroxyl groups at the buried interface enhances the iodide migration activation energy of CsPbI_(2)Br for strengthening the phase *** a result,the optimized CsPbI_(2)Br PSCs realize a remarkable efficiency of 17.09%and an ultrahigh V_(oc)output of 1.43 V,which is one of the highest values for CsPbI_(2)Br PSCs.

关键词： inorganic perovskite Buried interface Defect Stability Open-circuit voltage loss

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Preventing inhomogeneous elemental distribution and phase segregation in mixed Pb-Sn inorganic perovskites via incorporating PbS quantum dots

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Journal of Energy Chemistry 2022年第2期31卷 179-185页

作者： Tao Zhang Huaxia Ban Qiang Sun Han Pan Haixuan Yu Zhiguo Zhang Xiaoli Zhang Yan Shen Mingkui Wang Wuhan National Laboratory for Optoelectronics Huazhong University of Science and TechnologyWuhan 430074HubeiChina State Centre for International Cooperation on Designer Low-Carbon&Environmental Materials School of Materials Science and EngineeringZhengzhou UniversityZhengzhou 450001HenanChina

Inhomogeneous Pb/Sn elemental distribution and the resulted phase segregation in mixed Pb-Sn halide perovskites would result in energy disorder(band structure and phase distribution disorder),which greatly limits their photovoltaic ***,Pb S quantum dot has been synthesized and demonstrated as seeds for modulation crystallization dynamics of the mixed Pb-Sn inorganic perovskites,allowing an enhanced film quality and significantly suppressing phase *** this additive power conversion efficiency of 8%and 6%is obtained under irradiation of full sunlight in planar and mesoporous structured solar cells in combination with CsPb_(0.5) Sn_(0.5)I_(2)Br inorganic perovskite,*** finding reveals exploring the actual Pb/Sn atoms location in perovskite structure and its influence on developing efficient and stable low-bandgap perovskite solar cells.

关键词： inorganic perovskite Phase segregation Optoelectronic material Photovoltaic device

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Chemical vapor deposition growth of phase-selective inorganic lead halide perovskite films for sensitive photodetectors

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Chinese Chemical Letters 2021年第1期32卷 489-492页

作者： Weilong Xu Mengsi Niu Xiaoyu Yang Haiyue Chen Xiaohong Cai Trevor A.Smith Kenneth PGhiggino Xiaotao Hao School of Photoelectric Engineering Changzhou Institute of TechnologyChangzhou 213002China School of Physics State Key Laboratory of Crystal MaterialsShandong UniversityJi'nan 250100China ARC Centre of Excellence in Exciton Science School of ChemistryThe University of MelbourneParkvilleVictoria 3010Australia

inorganic lead halide perovskites are attractive optoelectronic materials owing to their relative stability compared to organic cation *** chemical vapor deposition(CVD) method offers potential for high quality perovskite film *** deposition temperature is a critical parameter determining the film quality owing to the melting difference between the ***,perovskite films were deposited by the CVD method at various temperatures between 500-800℃.The perovskite phase converts from CsPb_(2)Br_(5) to CsPbBr_(3) gradually as the deposition temperature is *** grain size of the perovskite films also increases with *** phase transition mechanism was *** photoexcited state dynamics were investigated by spatially and temporally resolved fluorescence *** perovskite film deposited under 750℃ condition is of the CsPbBr_(3) phase,showing low trap-state density and large crystalline grain size.A photodetector based on perovskite films shows high photocurrent and an on/off ratio of ~2.5×10^(4).

关键词： Chemical vapor deposition inorganic perovskite Phase-selective Photodetector Photophysical dynamics

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Engineering inorganic lead halide perovskite deposition toward solar cells with efficiency approaching 20%

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聚集体(英文) 2021年第1期2卷 66-83页

作者： Fa-Zheng Qiu Ming-Hua Li Jun-Jie Qi Yan Jiang Jin-Song Hu Beijing National Laboratory for Molecular Sciences(BNLMS) CAS Key Laboratory of Molecular Nanostructure and NanotechnologyInstitute of ChemistryChinese Academy of SciencesBeijingChina State Key Laboratory for Advanced Metals and Materials School of Materials Science and EngineeringUniversity of Science and Technology BeijingBeijingChina Energy Materials and Optoelectronics Unit Songshan Lake Materials LaboratoryDongguanGuangdongChina School of Chemical Sciences University of Chinese Academy of SciencesBeijingChina

inorganic perovskite materials have gained tremendous attention due to their superior chemical and thermal stability than organic-inorganic hybrid *** the past years,substantial research efforts have been devoted to developing uniform and pin-hole free inorganic perovskite films with high electronic *** a result,power conversion efficiency of inorganic perovskite solar cells(PSCs)has boosted to over 19%,which presents a promising potential for technology ***,we give a comprehensive review of the recent progress on state-of-the-art inorganic cesium lead halide based PSCs,particularly on the perovskite deposition *** show a clear roadmap to fabricate high electronic quality inorganic perovskite films by tuning the precursor crystallization kinetics,performing post-deposition treatments,and passivating surface/interface *** perovskite films prepared by these approaches exhibit not only high crystallinity,favorable morphology,and low trap densities but also improved phase *** advanced deposition approaches lay the foundation for further improving the performance and long-term operational stability of inorganic perovskite photovoltaics.

关键词： efficiency inorganic perovskite methodology solar cell stability

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Efficient CO_(2)Reduction to Formate on CsPbI_(3) Nanocrystals Wrapped with Reduced Graphene Oxide

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Nano-Micro Letters 2023年第10期15卷 1-14页

作者： Minh Tam Hoang Chen Han Zhipeng Ma Xin Mao Yang Yang Sepideh Sadat Madani Paul Shaw Yongchao Yang Lingyi Peng Cui Ying Toe Jian Pan Rose Amal Aijun Du Tuquabo Tesfamichael Zhaojun Han Hongxia Wang School of Chemistry and Physics Faculty of ScienceQueensland University of TechnologyBrisbaneQLD 4001Australia Centre for Materials Science Queensland University of TechnologyBrisbaneQLD 4001Australia School of Chemical Engineering The University of New South WalesKensingtonNSW 2052Australia Centre for Organic Photonics&Electronics(COPE) School of Chemistry and Molecular BiosciencesThe University of QueenslandBrisbaneQLD 4072Australia School of Engineering The University of NewcastleCallaghanNSW 2038Australia

Transformation of greenhouse gas(CO_(2))into valuable chemicals and fuels is a promising route to address the global issues of climate change and the energy *** halide perovskite catalysts have shown their potential in promoting CO_(2)reduction reaction(CO_(2)RR),however,their low phase stability has limited their application ***,we present a reduced graphene oxide(rGO)wrapped CsPbI_3 perovskite nanocrystal(NC)CO_(2)RR catalyst(CsPbI_3/rGO),demonstrating enhanced stability in the aqueous *** CsPbI_3/rGO catalyst exhibited>92%Faradaic efficiency toward formate production at a CO_(2)RR current density of~12.7 mA cm^(-2).Comprehensive characterizations revealed the superior performance of the CsPbI_3/rGO catalyst originated from the synergistic effects between the CsPbI_3 NCs and rGO,i.e.,rGO stabilized theα-CsPbI_3 phase and tuned the charge distribution,thus lowered the energy barrier for the protonation process and the formation of~*HCOO intermediate,which resulted in high CO_(2)RR selectivity toward *** work shows a promising strategy to rationally design robust metal halide perovskites for achieving efficient CO_(2)RR toward valuable fuels.

关键词： perovskite nanocrystal Electrocatalyst inorganic perovskite CO_(2)reduction Formate production

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