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Simultaneously enhanced moisture tolerance and defect passivation of perovskite solar cells with cross-linked grain encapsulation

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Journal of Energy Chemistry 2021年第5期30卷 455-462页

作者： Ke Xiao Qiaolei Han Yuan Gao Shuai Gu Xin Luo Renxing Lin Jia Zhu Jun Xu hairen tan National Laboratory of Solid State Microstructures Jiangsu Key Laboratory of Artificial Functional MaterialsCollege of Engineering and Applied SciencesNanjing UniversityNanjing 210093JiangsuChina School of Electronics Science and Engineering Nanjing UniversityNanjing 210093JiangsuChina

The grain surfaces(film surface and grain boundary)of polycrystalline perovskite films are vulnerable sites in solar cells since they pose a high defect density and initiate the degradation of perovskite *** simultaneously defect passivation and grain protection from moisture is crucial for the viability of perovskite solar ***,an in situ cross-linked grain encapsulation(CLGE)strategy that improves both device stability and defect passivation is ***-linkable semiconducting small molecules are mixed into the antisolvent to uniformly form a compact and conducting cross-linked layer over the grain *** cross-linked coating layer not only passivates trap states and facilitates hole extraction,but also enhances the device stability by preventing moisture *** the CLGE strategy,a high power conversion efficiency(PCE)of 22.7%is obtained in 1.55-eV bandgap planar perovskite solar *** unencapsulated devices with CLGE exhibit significantly enhanced device stability again moisture and maintain>90%of their initial PCE after shelf storage under ambient condition for over10,000 h.

关键词： Perovskite solar cell Cross-link Defect passivation Stability Moisture tolerance

Present status and future prospects for monolithic all-perovskite tandem solar cells

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Science China Materials 2022年第12期65卷 3353-3360页

作者： Jin Wen hairen tan National Laboratory of Solid State Microstructures Collaborative Innovation Center of Advanced MicrostructuresJiangsu Key Laboratory of Artificial Functional MaterialsFrontiers Science Center for Critical Earth Material CyclingCollege of Engineering and Applied SciencesNanjing UniversityNanjing 210023China

Photovoltaic(PV)technologies have been considered as one of the most promising low-cost alternatives of traditional fossil *** silicon(c-Si)solar cells currently dominate the commercial PV market due to their robust manufacturing,excellent reliability and abundant raw *** costs of c-Si PVs have dropped significantly in the last decade,driving the global exponential growth in ***,for state-ofthe-art c-Si cells,the efficiency is approaching their practical efficiency limit of∼27%,leaving very limited space for *** further drive down the costs of PV electricity,it is imperative to develop low-cost PV technologies that can further increase the power conversion efficiencies(PCEs)at the cell and module levels.

关键词：光电转换效率叠层太阳能电池光伏技术度电成本钙钛矿窄带隙隧穿结宽带隙

Ultrasensitive and stable X-ray detection using zero-dimensional lead-free perovskites

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Journal of Energy Chemistry 2020年第10期29卷 299-306页

作者： Xiaojia Zheng Wei Zhao Peng Wang hairen tan Makhsud I.Saidaminov Shujie Tie Ligao Chen Yufei Peng Jidong Long Wen-HuZhang Sichuan Research Center of New Materials Institute of Chemical MaterialsChina Academy of Engineering PhysicsChengdu 610200SichuanChina Institute of Fluid Physics China Academy of Engineering PhysicsMianyang 621900SichuanChina National Laboratory of Solid State Microstructures Jiangsu Key Laboratory of Artificial Functional MaterialsCollege of Engineering and Applied SciencesNanjing UniversityNanjing 210093JiangsuChina Departments of Chemistry and Electrical&Computer Engineering Centre for Advanced Materials and Related Technologies(CAMTEC)University of VictoriaVictoria V8P 5C2BCCanada

Sensitive and reliable X-ray detectors are essential for medical radiography,industrial inspection and security *** the radiation dose allows reduced health risks and increased frequency and fidelity of diagnostic technologies for earlier detection of disease and its ***-dimensional(3 D)organic-inorganic hybrid lead halide perovskites are promising for direct X-ray detection-they show improved sensitivity compared to conventional X-ray ***,their high and unstable dark current,caused by ion migration and high dark carrier concentration in the 3 D hybrid perovskites,limits their performance and long-term operation *** we report ultrasensitive,stable X-ray detectors made using zero-dimensional(0 D)methylammonium bismuth iodide perovskite(MA3Bi2I9)single *** 0 D crystal structure leads to a high activation energy(Ea)for ion migration(0.46 e V)and is also accompanied by a low dark carrier concentration(~10^6 cm^-3).The X-ray detectors exhibit sensitivity of 10,620μC Gy-1 air cm-2,a limit of detection(Lo D)of 0.62 nG yairs-1,and stable operation even under high applied biases;no deterioration in detection performance was observed following sensing of an integrated X-ray irradiation dose of^23,800 m Gyair,equivalent to>200,000 times the dose required for a single commercial X-ray chest *** the ion migration channels and decreasing the dark carrier concentration in perovskites provide routes for stable and ultrasensitive X-ray detectors.

关键词： X-ray detector Zero-dimensional perovskite Lead-free Carrier concentration Stability Limit of detection Sensitivity

Low-temperature processed inorganic hole transport layer for efficient and stable mixed Pb-Sn low-bandgap perovskite solar cells

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Science Bulletin 2019年第19期64卷 1399-1401页

作者： Qiaolei Han Ying Wei Renxing Lin Zhimin Fang Ke Xiao Xin Luo Shuai Gu Jia Zhu Liming Ding hairen tan National Laboratory of Solid State Microstructures Jiangsu Key Laboratory of Artificial Functional MaterialsCollege of Engineering and Applied SciencesNanjing UniversityNanjing 210093China Center for Excellence in Nanoscience(CAS) Key Laboratory of Nanosystem and Hierarchical Fabrication(CAS)National Center for Nanoscience and TechnologyBeijing 100190China

Metal halide perovskite solar cells(PSCs)have attracted tremendous attention as an emerging photovoltaic technology due to their high efficiency,low cost and ease of fabrication from earth-abundant materials[1,2].The power conversion efficiencies(PCEs)have been rapidly boosted from 3.8%in the pioneer’s work to a certified 24.2%nowadays in just ten years[3].The PCE breakthroughs in PSCs have mostly adopted full lead-based perovskites(APbX3)with bandgaps of 1.5–1.6 eV.

关键词： Low-temperature PEDOT Pb solar cells

Self‐assembled monolayers for perovskite solar cells

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Information ＆ Functional Materials 2024年第1期1卷 2-25页

作者： Dongdong Xu Pu Wu hairen tan National Laboratory of Solid State Microstructures College of Engineering and Applied SciencesFrontiers Science Center for Critical Earth Material CyclingNanjing UniversityNanjingChina

In metal‐halide perovskite solar cells(PSCs),various carrier recombination losses occur at the interface between metal oxides(MOs)and perovskite(PVK)due to the imperfect lattice structure of the crystal ***,the nonoptimal energy levels of MOs and PVK,as well as ion diffusion and chemical corrosion between the two materials,severely hinder carrier transport at the ***,there is an urgent need to introduce multifunctional materials between MOs and PVK to mitigate interface defects,carrier transport limitations,chemical corrosion,and other related *** recent years,self‐assembled monolayers(SAMs)have emerged as essential organic interfacial materials for effectively bridging MOs and PVK,playing a pivotal role in enhancing cells’*** on this,we provide a detailed overview of the origin and development of SAMs in PSCs and summarize the importance and potential of SAMs from various aspects,including their chemical structure,interface passivation,energy level tuning,and interface *** finally discuss the prospects of SAMs in terms of molecular structure,deposition methods,and their application in narrow‐band gap *** these insights,it is anticipated that SAMs will assist in realizing larger,highly efficient,stable,and cost‐effective PSCs,thereby enhancing the competitiveness of PSCs in the solar photovoltaics market.

关键词： metal oxides perovskite solar cells self‐assembled monolayers

Revealing the output power potential of bifacial monolithic all-perovskite tandem solar cells

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eLight 2022年第1期2卷 274-283页

作者： Hongjiang Li Yurui Wang Han Gao Mei Zhang Renxing Lin Pu Wu Ke Xiao hairen tan Jiangsu Key Laboratory of Artificial Functional Materials College of Engineering and Applied SciencesNational Laboratory of Solid State MicrostructuresNanjing UniversityNanjing 210023China

Bifacial monolithic all-perovskite tandem solar cells have the promise of delivering higher output power density by inheriting the advantages of both tandem and bifacial architectures ***,we demonstrate,for the first time,the bifacial monolithic all-perovskite tandem solar cells and reveal their output power *** bifacial tandems are realized by replacing the rear metal electrodes of monofacial tandems with transparent conduction oxide *** engineering is deployed to achieve current matching under various rear illumination *** bifacial tandems show a high output power density of 28.51 mW cm−2 under a realistic rear illumination(30 mW cm−2).Further energy yield calculation shows substantial energy yield gain for bifacial tandems compared with the monofacial tandems under various ground albedo for different climatic *** work provides a new device architecture for higher output power for all-perovskite tandem solar cells under real-world conditions.

关键词： Bifacial tandems All-perovskite tandem solar cells Bandgap engineering Energy yield Stability

Cross-linked hole transport layers for high-efficiency perovskite tandem solar cells

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Science China Chemistry 2021年第11期64卷 2025-2034页

作者： Yurui Wang Shuai Gu Guoliang Liu Liping Zhang Zhou Liu Renxing Lin Ke Xiao Xin Luo Jianhua Shi Junling Du Fanying Meng Ludong Li Zhengxin Liu hairen tan National Laboratory of Solid State Microstructures Jiangsu Key Laboratory of Artificial Functional MaterialsCollege of Engineering and Applied SciencesNanjing UniversityNanjing210093China Research Center for New Energy Technology Shanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghai201800China

Perovskite tandem solar cells have recently received extensive attention due to their promise of achieving power conversion efficiency(PCE)beyond the limits of single-junction ***,their performance is still largely constrained by the widebandgap perovskite solar cells which show considerable open-circuit voltage(VOC)***,we increase the VOCand PCE of wide-bandgap perovskite solar cells by changing the hole transport layer(HTL)from commonly used poly(bis(4-phenyl)(2,4,6-trimethylphenyl)amine)(PTAA)to in-situ cross-linked small molecule N_(4),N_(4)′-di(naphthalen-1-yl)-N_(4),N_(4)′-bis(4-vinylphenyl)biphenyl-4,4′-diamine(VNPB).The stronger interaction and lower trap density at the VNPB/perovskite interface improve the PCE and stability of wide-bandgap perovskite solar *** using the cross-linked HTL for front wide-bandgap subcells,PCEs of 24.9%and 25.4%have been achieved in perovskite/perovskite and perovskite/silicon tandem solar cells,*** results demonstrate that cross-linkable small molecules are promising for high-efficiency and cost-effective perovskite tandem photovoltaic devices.

关键词： perovskite solar cells tandem solar cells hole transport layer cross-linked

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钙钛矿薄膜的均匀结晶和埋底钝化策略: 刷新全钙钛矿叠层光伏组件纪录效率

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科学通报 2024年第12期69卷 1523-1525页

作者：高寒谭海仁南京大学固体微结构物理国家重点实验室现代工程与应用科学学院关键地球物质循环前沿科学中心南京210023

钙钛矿太阳能电池具有制备工艺简单且成本较低的优势,为光伏发电的降本增效提供了有效途径.经过10余年的发展,单结钙钛矿电池的效率已达26.1%[1],接近其Shockley–Queisser效率极限,构筑叠层太阳能电池成为进一步突破单结电池效率极限... 详细信息

钙钛矿太阳能电池具有制备工艺简单且成本较低的优势,为光伏发电的降本增效提供了有效途径.经过10余年的发展,单结钙钛矿电池的效率已达26.1%[1],接近其Shockley–Queisser效率极限,构筑叠层太阳能电池成为进一步突破单结电池效率极限的重要方向.全钙钛矿叠层太阳能电池由富溴的纯铅组分宽带隙(wide-bandgap,WBG)子电池、互联层和铅锡共混(Pb-Sn)的窄带隙(narrow-bandgap,NBG)子电池按照自下而上的顺序堆叠而成[2].目前,实验室制备的小面积(孔径面积≤1 cm^(2))全钙钛矿叠层电池的光电转化效率(简称“效率”)可达29.1%[1],已经超越了单晶硅太阳能电池和单结钙钛矿太阳能电池的最高效率,具有极大的商业化应用潜力.

关键词：钙钛矿太阳能电池光电转化效率叠层电池光伏组件电池效率商业化应用钙钛矿薄膜

Toward stable and efficient Sn-containing perovskite solar cells

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Science Bulletin 2020年第10期65卷 786-790,M0003页

作者： Feng Hao hairen tan Zhiwen Jin Liming Ding School of Materials and Energy University of Electronic Science and Technology of ChinaChengdu 611731China National Laboratory of Solid State Microstructures Jiangsu Key Laboratory of Artificial Functional MaterialsCollege of Engineering and Applied SciencesNanjing UniversityNanjing 210093China School of Physical Science and Technology Key Laboratory for Magnetism and Magnetic Materials(MoE)Lanzhou UniversityLanzhou 730000China Center for Excellence in Nanoscience(CAS) Key Laboratory of Nanosystem and Hierarchical Fabrication(CAS)National Center for Nanoscience and TechnologyBeijing 100190China

Astonishing progress on the stability and performance of lead halide perovskite solar cells(PSCs)has been achieved in the past few ***,the presence of toxic lead in the perovskite composition still remains a major challenge for the large-scale deployment due to legislation and environment issues.A straightforward solution is to develop lead-free perovskite alternatives without sacrificing the excellent optical and electrical *** all the lead-free alternatives,non-toxic Sn halide perovskites are the most promising since Sn has similar ionic radius to ***-based perovskites display optical and electronic properties similar to their lead analogues,which offers high potential to achieve high performance.

关键词： properties. perovskite halide