共查询到20条相似文献，搜索用时 46 毫秒
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现代科学技术的发展具有学科之间相互渗透、综合交叉的特点,科学和经济之间的相互作用,推动了当前最活跃的信息科学、生命科学和材料科学的发展,又导致了一系列高新技术和高性能材料的诞生。 相似文献
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倒置钙钛矿太阳能电池因具有器件结构简单、迟滞效应小和制造成本低等优点,受到了研究人员越来越多的关注。电子传输层作为钙钛矿太阳能电池中的重要组成部分,其作用主要是传输电子和阻挡空穴。对电子传输层进行改性,可以有效解决其表面粗糙、能级不匹配、电子迁移率低等问题,从而提高器件的光电转换效率。本文从电子传输材料的选择、电子传输层的界面修饰、掺杂作用和改性三方面综述了电子传输层对倒置钙钛矿太阳能电池的性能的影响,并对今后倒置钙钛矿太阳能电池实现商业化做出了展望。 相似文献
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朱穆言;颜平远;王成强;向晨红;武子涵;李衡;盛传祥 《光电子技术》2025,(1):33-44
概述了溴基钙钛矿材料的基本性质,调研了近些年对FAPbBr3和CsPbBr3两种纯溴基钙钛矿的研究进展,详细梳理了部分离子掺杂对溴基钙钛矿及其器件性能的影响机制,分析了影响钙钛矿半透明太阳能电池效率和透明度的因素,列举了钙钛矿半透明太阳能电池的优化方案,包括改良顶部电极材料、设计微观结构、构造叠层电池等。还介绍了一些大规模制备半透明钙钛矿薄膜的策略,并讨论了溴基钙钛矿应用于半透明太阳能电池领域的优势和前景。研究表明：溴基钙钛矿半透明太阳能电池因为其天然的可见光透过率和结构稳定性,有望成为钙钛矿太阳能电池研究和产业化的热门题材。 相似文献
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掺杂改性对钙钛矿晶体结构演化以及薄膜的光吸收性能有很大影响,并直接决定了钙钛矿太阳能电池的性能。采用一步溶液法制备了钙钛矿太阳能电池器件,分别研究了阳离子掺杂对钙钛矿晶体结构、晶体缺陷与器件光电性能的影响。研究表明,甲脒基(FA)及Cs离子掺杂改善了钙钛矿的成膜性以及薄膜的表面形貌。同时,阳离子掺杂有效降低了钙钛矿晶体的缺陷密度,这源于FA及Cs离子的取代掺杂有效促进了钙钛矿相的形成,避免了二次相的产生,并因此改善了钙钛矿薄膜表面形貌。器件的光电转化效率由10.29%提升至12.49%。 相似文献
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频率上转换掺稀土氧氟纳米微晶玻璃的研究进展 总被引：3，自引：0，他引：3
综述了近年来用于上转换发光的掺稀土离子氧氟微品玻璃的研究概况,阐述了氧氟微品玻璃作为上转换发光材料的发展和研究中问题,提出了值得进一步研究的工作并对掺稀土离子氧氯微晶玻璃未来的前景作了展望。 相似文献
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稀土掺杂Y2O3纳米晶发光材料的研究进展 总被引：4，自引：1，他引：4
总结了近几年稀土掺杂Y2O3纳米晶发光材料的研究工作。回顾了Y2O3:Eu3+纳米晶的制备方法及发光性质,特别是采用溶胶–凝胶热解过程,在激发光谱中观察到同基质晶格和粒径相关的蓝色位移(≈600cm–1)。详细介绍了Er3+和Ho3+掺杂的Y2O3纳米晶的上转换机理,由于纳米晶表面容易吸附空气中的CO2和H2O,使得上转换性能明显低于体材料。通过对其进行表面改性处理,可以大大提高发光效率。并探讨了其发展前景。 相似文献
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Zhimin Fang Ting Nie Shengzhong Liu Jianning Ding 《Advanced functional materials》2024,34(42):2404402
Wide-bandgap (WBG) perovskite solar cells (PSCs) are recognized as promising candidates for diversified photovoltaics (PVs), such as tandem devices, indoor PVs, and semitransparent building-integrated PVs. However, these WBG perovskites made from a mixed-halides strategy suffer from severe phase segregation under continuous illumination, leading to exacerbated non-radiative recombination, and consequently decreased open-circuit voltage and efficiency. In this review, the generation and reversal processes of phase segregation in WBG perovskites are meticulously introduced. Additionally, the major characterization techniques for phase segregation are presented. A detailed summary of recent progress in enhancing photostability of WBG PSCs through various strategies is provided. These strategies primarily concentrate on composition regulation, crystallization modulation, inhibition of ion migration, and strain regulation. Finally, perspectives and potential directions are carefully discussed to promote the further development of high-efficiency and photostable WBG PSCs. 相似文献
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采用水热法合成了Eu3+单掺YF3荧光粉.分析了样品的结构与形貌,结果表明,所合成的样品为单相,颗粒粒度分布均匀.测定了YF3:Eu3+的激发和发射光谱,结果显示,激发光谱峰值分别为320,365,386,397,418和467 nm,激发主峰峰值位于397 nm;发射光谱由位于591 nm(5D0→F1)和612 n... 相似文献
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Chengxi Zhang Ardeshir Baktash Julian A. Steele Dongxu He Shanshan Ding Saivineeth Penukula Mengmeng Hao Rijia Lin Jingwei Hou Nicholas Rolston Miaoqiang Lyu Peng Chen Wu-Qiang Wu Lianzhou Wang 《Advanced functional materials》2024,34(24):2315897
Perovskite solar cells (PSCs) have experienced exceptional development in recent years, due to their outstanding photoelectronic properties and low-cost solution processing. Many state-of-the-art PSC designs have been effectively demonstrated using a stacked 3D perovskite/2D perovskite heterostructure, yet limitations arise due to the low conductivity of the 2D perovskite, the hidden buried interface of 3D perovskite, and halide ion migration within 3D/2D PSC device under operational bias. Here, these limitations are overcome by developing a novel and universal post-synthetic metal (Zn2+) doping strategy and realizing 3D/2D PSCs with superior efficiency and stability. Informed by ab initio calculations and synchrotron fine structure experiments, it is revealed that the introduced zinc ions are energetically favored at interstitial crystal sites, subsequently hindering the migration of halide ions and producing a beneficial shift toward a more n-type character in the buried 3D perovskite interface. Combined with extensive photophysical characterization, the Zn2+-modified 3D/2D perovskite thin film is shown to strongly recover its photo-carrier conductivity compared with the 3D/2D perovskite film, boosting the efficiency (22.90%) of PSCs while exhibiting improved humidity and operational stability. 相似文献
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Yanbin Huang Jun Liu Yanchun Deng Yuanyuan Qian Xiaohao Jia Mengmeng Ma Cheng Yang Kong Liu Zhijie Wang Shengchun Qu Zhanguo Wang 《半导体学报》2020,41(1):011701-011701-17
Solar water splitting is a promising strategy for sustainable production of renewable hydrogen, and solving the crisis of energy and environment in the world. However, large-scale application of this method is hampered by the efficiency and the expense of the solar water splitting systems. Searching for non-toxic, low-cost, efficient and stable photocatalysts is an important way for solar water splitting. Due to the simplicity of structure and the flexibility of composition, perovskite based photocatalysts have recently attracted widespread attention for application in solar water splitting. In this review, the recent developments of perovskite based photocatalysts for water splitting are summarized. An introduction including the structures and properties of perovskite materials, and the fundamentals of solar water splitting is first provided. Then, it specifically focuses on the strategies for designing and modulating perovskite materials to improve their photocatalytic performance for solar water splitting. The current challenges and perspectives of perovskite materials in solar water splitting are also reviewed. The aim of this review is to summarize recent findings and developments of perovskite based photocatalysts and provide some useful guidance for the future research on the design and development of highly efficient perovskite based photocatalysts and the relevant systems for water splitting. 相似文献
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Nianqiao Liu Ning Li Changke Jiang Delong Han Jitao Dai Yawei Niu Yunjie Dou Shangshang Chen Yimu Chen Zhaolai Chen Xutang Tao 《Advanced functional materials》2024,34(52):2410631
Metal halide perovskite single crystals are promising for photovoltaic applications due to their outstanding properties. However, the high surface trap density causes severe nonradiative recombination and ion migration, hindering device performance and stability. Herein, mitigation of the deficient crystal surface is reported by optimized polishing engineering, resulting in stoichiometric lead-iodine ratio with reduced iodide ion vacancies, increased ion migration activation energy, and suppressed nonradiative recombination. As a result, Cs0.05FA0.95PbI3 (FA = formamidinium) devices exhibit an impressive efficiency of 23.1%, which is one of the highest values for single-crystal perovskite solar cells (PSCs). Moreover, multiple recycling of the degraded single-crystal PSCs with higher efficiency and stability is achieved by removing the deteriorated surface, validating crystal surface dominates device degradation while the role of bulk and buried interface is negligible, which is different from polycrystalline devices. The T85 lifetime (remain 85% of initial efficiency) of Cs0.05FA0.95PbI3 devices increases to 1150 h after the recycling process, which is much better than that of previously reported single-crystal PSCs. Since deficient crystal surface and ion migration are universal issues of perovskite materials, this work will promote the development of stable single-crystal PSCs and other optoelectronic devices, such as X-ray detectors, light-emitting diodes, etc. 相似文献