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| 1 | 基于无铅钙钛矿太阳能电池及电池稳定性的研究进展显示文摘有机-无机杂化钙钛矿太阳能电池作为新型薄膜太阳能电池异军突起。自2009年日本学者首次将卤素铅钙钛矿材料应用于染料敏化电池获得3.8%的光电转化效率,至2020年香港城市大学将其记录刷新至25.5%,这种发展速度是其他太阳能电池不可比拟的。目前高效率电池中都含铅、以及钙钛矿材料在湿热条件和空气中的不稳定性,这些限制了钙钛矿太阳能电池的实际应用。文章简明扼要地介绍了钙钛矿材料的结构和性质、钙钛矿太阳能电池结构与原理,以及光吸收层钙钛矿薄膜的几种典型制备方法;着重对无铅钙钛矿电池材料制备和卤素铅甲基氨的铅位替代来得到的无铅钙钛矿太阳能电池,另外对钙钛矿材料表面进行修饰处理来提高钙钛矿太阳能电池在空气和湿热条件下的稳定性研究进展进行综述。 | 章海 朱华 张天豪 余石金 郭平春 王艳香 杨志胜 | 2021 | 中国陶瓷2021，57，6： | 0 |
| 2 | Material patterning on substrates by manipulation of fluidic behavior显示文摘Patterned materials on substrates are of great importance for a wide variety of applications.In solution-based approaches to material patterning;fluidic flow is inevitable.Here we demonstrate not only the importance of fluidic behavior but also the methodology of engineering the flow pattern to guide the material crystallization and assembly.We show by both experiment and simulation that substrate heating;which is generally used to accelerate evaporation,produces irregular complex vortexes.Instead;a top-heating-bottom-cooling(THBC)set-up offers an inverse temperature gradient and results in a single Marangoni vortex,which is desired for ordered nanomaterial patterning near the contact line.We then realize the fabrication of large-scale patterns of iodide perovskite crystals on different substrates under THBC conditions.We further demonstrate that harnessing the flow behavior is a general strategy with great feasibility to pattern various functional materials ranging from inorganic;organic,hybrid to biological categories on different substrates,presenting great potential for practical applications. | Yitan Li Hao Wang Henglu Xu Shiting Wu Xuemei Li Jiapeng Yu Chaoyu Huang Zeyao Zhang Hao Sun Lu Han Meihui Li Anyuan Cao Zhenhai Pan Yan Li | 2019 | National Science Review2019，6，4： | 0 |
| 3 | A multiaxial lead-free two-dimensional organic-inorganic perovskite ferroelectric显示文摘Two-dimensional(2 D)hybrid organic-inorganic perovskites(HOIPs)have recently gained tremendous interest because of their unique features in contrast to three-dimensional counterparts and traditional 2 D materials.However,although some 2 D HOIP ferroelectrics have been achieved,the issue of toxic Pb and uniaxial nature impede their further application.Herein,for the first time,we report a lead-free 2 D HOIP multiaxial ferroelectric,[3,3-difluorocyclobutylammonium]2 CuCl4(1),which shows four ferroelectric axes and eight equivalent polarization directions,more than those of the other 2 D HOIP ferroelectrics and even the inorganic perovskite ferroelectric BaTiO3(three ferroelectric axes and six equivalent polarization directions).1 also features a high Curie temperature of 380 K and exhibits remarkable thermochromism of color change from green-yellow to dark brown.To our knowledge,1 is the first multiaxial lead-free2 D HOIP ferroelectric.This work sheds light on the exploration of better lead-free 2 D HOIP ferroelectrics. | Chao-Ran Huang Xuzhong Luo Xiao-Gang Chen Xian-Jiang Song Zhi-Xu Zhang Ren-Gen Xiong | 2021 | National Science Review2021，8，5： | 0 |
| 4 | Photoexcitation-induced passivation of SnO_(2) thin film for efficient perovskite solar cells显示文摘A high-quality tin oxide electron transport layer(ETL)is a key common factor to achieve high-performance perovskite solar cells(PSCs).However,the conventional annealing technique to prepare high-quality ETLs by continuous heating under near-equilibrium conditions requires high temperatures and a long fabrication time.Alternatively,we present a non-equilibrium,photoexcitation-induced passivation technique that uses multiple ultrashort laser pulses.The ultrafast photoexcitation and following electron–electron and electron–phonon scattering processes induce ultrafast annealing to efficiently passivate surface and bulk defects,and improve the crystallinity of SnO_(2),resulting in suppressing the carrier recombination and facilitating the charge transport between the ETL and perovskite interface.By rapidly scanning the laser beam,the annealing time is reduced to several minutes,which is much more efficient compared with conventional thermal annealing.To demonstrate the university and scalability of this technique,typical antisolvent and antisolvent-free processed hybrid organic–inorganic metal halide PSCs have been fabricated and achieved the power conversion efficiency(PCE)of 24.14%and 22.75%respectively,and a 12-square-centimeter module antisolvent-free processed perovskite solar module achieves a PCE of 20.26%,with significantly enhanced performance both in PCE and stability.This study establishes a new approach towards the commercialization of efficient low-temperature manufacturing of PSCs. | Nianyao Chai Xiangyu Chen Zhongle Zeng Ruohan Yu Yunfan Yue Bo Mai Jinsong Wu Liqiang Mai Yi-Bing Cheng Xuewen Wang | 2023 | National Science Review2023，10，11： | 0 |
| 5 | Printing strategies for scaling-up perovskite solar cells显示文摘Photovoltaic technology offers a sustainable solution to the problem of soaring global energy demands.Recently,metal halide perovskite solar cells(PSCs)have attracted worldwide interest because of their high power conversion efficiency of 25.5%and great potential in becoming a disruptive technology in the photovoltaic industry.The transition from research to commercialization requires advancements of scalable deposition methods for both perovskite and charge transporting thin films.Herein,we share our view regarding the current challenges to fabrication of PSCs by printing techniques.We focus particularly on ink technologies,and summarize the strategies for printing uniform,pinhole-free perovskite films with good crystallinity.Moreover,the stability of perovskite solar modules is discussed and analyzed.We believe this review will be advantageous in the area of printable electronic devices. | Yulong Wang Changyu Duan Pin Lv Zhiliang Ku Jianfeng Lu Fuzhi Huang Yi-Bing Cheng | 2021 | National Science Review2021，8，8： | 0 |
| 6 | 电荷传输层和热退火对钙钛矿薄膜电学性能的影响显示文摘有机-无机杂化钙钛矿(PVK)薄膜材料因具有较高的消光系数、较高的载流子迁移率、较低的激子束缚能、可控的禁带宽度等优势,近年来成为光伏研究的热点。钙钛矿太阳能电池器件结构简单、制备工艺高效、材料成本低廉,有望在未来取代传统硅电池。电荷传输层是钙钛矿太阳能电池的重要组成部分,本工作详细研究了不同底层电荷传输层对钙钛矿薄膜的表面电势、载流子复合寿命及电池性能的影响。扫描开尔文探针显微镜(SKPM)结果表明,底层电荷传输材料的导电类型会显著改变钙钛矿薄膜的表面电势,这一结果证实了钙钛矿薄膜的弱掺杂属性。当钙钛矿薄膜沉积在电子传输层衬底上时,薄膜表面电势高、功函数小,可能呈n型;反之,当薄膜沉积在空穴传输层衬底上时,薄膜表面电势低、功函数大,呈p型。进一步分析基于不同电荷传输层的钙钛矿薄膜的性能,发现表面光电压与电荷传输层性能之间存在一定联系。同时,进一步研究了钙钛矿薄膜的热稳定性与表面光电压之间的联系,发现表面光电压的变化能在一定程度上反映薄膜的热稳定性,并得出溴离子(Br-)、甲基氯化胺(MACl)和铯离子(Cs+)对钙钛矿薄膜的热稳定性具有一定提升作用。 | 左文韬 樊正方 刘国强 刘江 廖成 | 2020 | 材料导报2020，34，S01： | 0 |
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