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钙钛矿太阳电池(PSC)具有高光电转换效率(PCE)、低成本、易采用溶液法制备等特点,在发展轻薄、便携的柔性太阳电池方面有独特优势,可用于可穿戴设备、光伏建筑等领域。由于在柔性衬底上沉积均匀和高质量的钙钛矿薄膜颇具挑战性,目前,单结柔性钙钛矿太阳电池的PCE虽已经达到24.08%,但仍落后于刚性钙钛矿太阳电池(认证PCE为26.1%);此外,柔性钙钛矿薄膜在制备和弯曲循环过程中会不可避免地产生晶界裂纹,这也为柔性钙钛矿太阳电池的稳定性和可靠性带来巨大挑战。系统地评述了提升柔性钙钛矿太阳电池PCE和稳定性的研究进展,从柔性衬底、晶粒调控、晶界增强、界面钝化及结构优化等不同角度进行了归纳总结,并对柔性钙钛矿太阳电池未来发展存在的问题和挑战进行了展望。 相似文献
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钙钛矿太阳电池(Perovskite Solar Cells,PSCs)是由染料敏化太阳能电池演化出来的一种新型太阳能电池.其能够利用有机太阳能电池所采用的溶液法进行制备,极大降低了生产成本,有望成为新能源产业的一项重要技术.本文通过对检索到的国内外关于钙钛矿太阳电池的专利申请文件进行统计和梳理,对钙钛矿太阳电池领域的技术概况、专利申请态势以及专利技术发展趋势作了介绍,并分析了国内重点申请人的重点专利,为未来钙钛矿太阳电池领域的研究和改进提供参考. 相似文献
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采用一步法制作了基于 n-i-p结构的钙钛矿太阳电池。为了提高钙钛矿活性层以及TiO2与钙钛矿活性层接触面的质量,用 MAI、MABr和PbI2溶液对TiO2层进行预处理,研究了预处理对电池性能的影响。结果显示对TiO2进行预处理能够改善钙钛矿活性层薄膜的质量并提升钙钛矿太阳电池的性能。通过溶液预处理,太阳电池的能量转换效率和器件稳定性有显著提高,同时滞后效应明显减弱。 相似文献
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蒋君;杨攻旅;杨雨帆;王梦辉;李绿洲;胡宏伟;袁宁一;丁建宁 《半导体技术》2025,(1):17-22
界面修饰能够调控钙钛矿太阳电池（PSC）的埋底界面缺陷,为提高PSC的光电转换效率与稳定性,在电子传输层和钙钛矿层之间引入NbTaOx界面修饰层,并研究其对正置结构的PSC光伏性能的影响。将含乙醇铌和乙醇钽的乙醇溶液旋涂在致密的SnO2电子传输层表面,待其缓慢水解,经退火即可在SnO2薄膜表面原位生长得到NbTaOx修饰层。结合荧光光谱、水接触角测试和紫外光电子能谱等探究其影响机制。测试结果表明,基于NbTaOx界面修饰层的PSC光电转换效率由19.14%提升至21.51%。NbTaOx不仅可以提升电子传输能力,减少载流子在界面处的复合,且有利于钙钛矿层的沉积,提高钙钛矿薄膜的结晶质量。 相似文献
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铅基钙钛矿太阳电池的优异器件性能归因于其显著的光学和电子性质,其能量转换效率已从最初的约3.8%大幅提高到25%以上。尽管铅基钙钛矿太阳电池得到了快速的发展,但由于铅原子的毒性及其在热、光和湿度等条件下的不稳定性,阻碍了该类型钙钛矿光伏技术的实际应用。因此,寻找无铅、无毒和环保的卤化物钙钛矿来取代铅基材料在实际中的应用至关重要。无铅卤化物钙钛矿的研究是目前的研究热点之一。本文综述了无铅双钙钛矿Cs2AgBiBr6在钙钛矿太阳电池中的应用,介绍了Cs2AgBiBr6的结构与材料制备的方法,讨论了钙钛矿太阳电池的器件性能,分析了提高该类型光伏器件性能的相关策略,探讨了无铅钙钛矿面临的挑战以及发展方向。 相似文献
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碘化铅(PbI2)是两步法制备钙钛矿薄膜最常使用的金属卤化物前驱体,精确控制PbI2在钙钛矿薄膜中的含量和空间分布以及优化PbI2薄膜的形貌结构对于制备高效稳定的太阳电池具有重要意义。探索了PbI2的浓度和退火方式对钙钛矿薄膜及太阳电池性能的影响。研究发现,PbI2溶液的浓度不仅决定钙钛矿薄膜中PbI2的含量,也影响钙钛矿的晶粒尺寸、取向及光学吸收等性质,从而导致器件性能的改变,当钙钛矿薄膜表面分布约45%的PbI2时器件性能更佳。此外,PbI2的形貌、结晶性和孔隙度受退火方式的影响显著,与溶剂退火相比,通过短暂的1 min热退火制备的PbI2薄膜更有利于减少钙钛矿表界面缺陷,提升器件的开路电压,最终使器件的基础光电转换效率(PCE)可以提升至20.89%。上述研究结果有助于进一步优化钙钛矿太阳电池制备工艺,提升器件性能。 相似文献
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阴极材料对有机太阳电池性能的影响 总被引：1，自引：1，他引：0
分别用Al、LiF/Al和Ca/Al制备了三种不同阴极材料的体相异质结有机太阳电池.对其光电特性进行了表征,分析了不同阴极材料对电池性能的影响机制.结果表明:所制备的有机太阳电池在10-1 W/cm2辐照度的光照下,开路电压分别为0.419 3,0.565 0和0.591 1 V,能量转换效率分别为1.17％、2.06％和1.91％;采用LiF/Al层状阴极制备的有机太阳电池具有更高的能量转换效率;功函数愈低的材料做阴极,有机太阳电池的能量转换效率也愈高. 相似文献
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Hongling Guan Wenjun Zhang Jiwei Liang Chen Wang Xuzhi Hu Dexing Pu Lishuai Huang Yansong Ge Hongsheng Cui Yuanrong Zou Guojia Fang Weijun Ke 《Advanced functional materials》2023,33(30):2300860
Wide-bandgap (WBG) perovskite solar cells (PSCs) have garnered significant attention for their potential applications in tandem solar cells. However, their large open-circuit voltage (VOC) deficit and serious photo-induced halide segregation remain the main challenges that impede their applications. Herein, a post-treatment strategy without thermal annealing is presented to form a 2D top layer of 2-thiopheneethylammonium lead halide (n = 1) on WBG perovskites. This thermal annealing-free post-treatment method can more effectively passivate the defects of WBG methylamine (MA)-free formamidinium/cesium lead iodide/bromide perovskite films and suppress photo-induced perovskite phase segregation, as compared with the thermal annealing method that yields multi-2D phases. The resulting opaque and semi-transparent 1.66 eV-bandgap perovskite solar cells deliver maximum power conversion efficiencies of 21.47% (a small VOC deficit of 0.43 V) and 19.11%, respectively, both of which are among the highest reports for inverted MA-free WBG PSCs. Consequently, four-terminal all-perovskite tandem cells realize a remarkable efficiency of 26.64%, showing great promise for their applications in efficient multi-junction tandem solar cells. 相似文献
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Here, we introduced acetamidine (C2H3N2H3, Aa)-based salt as an additive in the fabrication of perovskite (CH3NH3PbI3) layer for perovskite solar cells. It was found that as an amidine-based salt, this additive successfully enhanced the crystallinity of CH3NH3PbI3 and helped to form smooth and uniform films with comparable grain size and full coverage. Besides, perovskite film with additive showed a much longer carrier lifetime and an obviously enhanced open-circuit voltage in the corresponding devices, indicating that the acetamidine-based salt can reduce the carrier recombination in both the film and device. We further demonstrate a promising perovskite device based on acetamidine salt by using a configuration of ITO/TiO2/Perovskite/Spiro-OMeTAD/Au under <150℃ fabrication condition. A power conversion efficiency (PCE) of 16.54% was achieved, which is much higher than the control device without acetamidine salt. These results present a simple method for film quality optimization of perovskite to further improve photovoltaic performances of perovskite solar cells, which may also benefit the exploration of A cation in perovskite materials. 相似文献
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Giles E. Eperon Victor M. Burlakov Pablo Docampo Alain Goriely Henry J. Snaith 《Advanced functional materials》2014,24(1):151-157
Organometal trihalide perovskite based solar cells have exhibited the highest efficiencies to‐date when incorporated into mesostructured composites. However, thin solid films of a perovskite absorber should be capable of operating at the highest efficiency in a simple planar heterojunction configuration. Here, it is shown that film morphology is a critical issue in planar heterojunction CH3NH3PbI3‐xClx solar cells. The morphology is carefully controlled by varying processing conditions, and it is demonstrated that the highest photocurrents are attainable only with the highest perovskite surface coverages. With optimized solution based film formation, power conversion efficiencies of up to 11.4% are achieved, the first report of efficiencies above 10% in fully thin‐film solution processed perovskite solar cells with no mesoporous layer. 相似文献
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Yu Han Huan Zhao Chenyang Duan Shaomin Yang Zhou Yang Zhike Liu Shengzhong Liu 《Advanced functional materials》2020,30(12)
Cesium‐based inorganic perovskites, such as CsPbI2Br, are promising candidates for photovoltaic applications owing to their exceptional optoelectronic properties and outstanding thermal stability. However, the power conversion efficiency of CsPbI2Br perovskite solar cells (PSCs) is still lower than those of hybrid PSCs and inorganic CsPbI3 PSCs. In this work, passivation and n‐type doping by adding CaCl2 to CsPbI2Br is demonstrated. The crystallinity of the CsPbI2Br perovskite film is enhanced, and the trap density is suppressed after adding CaCl2. In addition, the Fermi level of the CsPbI2Br is changed by the added CaCl2 to show heavy n‐type doping. As a result, the optimized CsPbI2Br PSC shows a highest open circuit voltage of 1.32 V and a record efficiency of 16.79%. Meanwhile, high air stability is demonstrated for a CsPbI2Br PSC with 90% of the initial efficiency remaining after more than 1000 h aging in air. 相似文献
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Yuan Cai Jian Cui Ming Chen Miaomiao Zhang Yu Han Fang Qian Huan Zhao Shaomin Yang Zhou Yang Hongtao Bian Tao Wang Kunpeng Guo Molang Cai Songyuan Dai Zhike Liu Shengzhong Liu 《Advanced functional materials》2021,31(7):2005776
With a certified efficiency as high as 25.2%, perovskite has taken the crown as the highest efficiency thin film solar cell material. Unfortunately, serious instability issues must be resolved before perovskite solar cells (PSCs) are commercialized. Aided by theoretical calculation, an appropriate multifunctional molecule, 2,2-difluoropropanediamide (DFPDA), is selected to ameliorate all the instability issues. Specifically, the carbonyl groups in DFPDA form chemical bonds with Pb2+ and passivate under-coordinated Pb2+ defects. Consequently, the perovskite crystallization rate is reduced and high-quality films are produced with fewer defects. The amino groups not only bind with iodide to suppress ion migration but also increase the electron density on the carbonyl groups to further enhance their passivation effect. Furthermore, the fluorine groups in DFPDA form both an effective barrier on the perovskite to improve its moisture stability and a bridge between the perovskite and HTL for effective charge transport. In addition, they show an effective doping effect in the HTL to improve its carrier mobility. With the help of the combined effects of these groups in DFPDA, the PSCs with DFPDA additive achieve a champion efficiency of 22.21% and a substantially improved stability against moisture, heat, and light. 相似文献
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Liangang Xiao Xing Wu Guoxing Ren Matthew A. Kolaczkowski Guang Huang Wanyi Tan Lin Ma Yidong Liu Xiaobin Peng Yonggang Min Yi Liu 《Advanced functional materials》2021,31(41):2105304
Introducing a third component into organic bulk heterojunction solar cells has become an effective strategy to improve photovoltaic performance. Meanwhile, the rapid development of non-fullerene acceptors (NFAs) has pushed the power conversion efficiency (PCE) of organic solar cells (OSCs) to a higher standard. Herein, a series of fullerene-free ternary solar cells are fabricated based on a wide bandgap acceptor, IDTT-M, together with a wide bandgap donor polymer PM6 and a narrow bandgap NFA Y6. Insights from the morphological and electronic characterizations reveal that IDTT-M has been incorporated into Y6 domains without disrupting its molecular packing and sacrificing its electron mobility and work synergistically with Y6 to regulate the packing pattern of PM6, leading to enhanced hole mobility and suppressed recombination. IDTT-M further functions as an energy-level mediator that increases open-circuit voltage (VOC) in ternary devices. In addition, efficient Förster resonance energy transfer (FRET) between IDTT-M and Y6 provides a non-radiative pathway for facilitating exciton dissociation and charge collection. As a result, the optimized ternary device features a significantly improved PCE up to 16.63% with simultaneously enhanced short-circuit current (JSC), VOC, and fill factor (FF). 相似文献
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Ahmed Farag Paul Fassl Hang Hu Thomas Feeney Aina Quintilla Marco A. Ruiz-Preciado Wolfram Hempel Dominik Bagrowski Philipp Noack Bianca Wattenberg Torsten Dippell Ulrich W. Paetzold 《Advanced functional materials》2023,33(3):2210758
The recent development of solution-processed perovskite thin films over micrometer-sized textured silicon bottom solar cells enables tandem solar cells with power conversion efficiencies > 30%. Next to improved light harvesting, textured silicon wafers are the industrial standard. To achieve high performance, the open-circuit voltage losses that occur when fabricating perovskite solar cells over such textures need to be mitigated. This study provides a practical guideline to discriminate and address the voltage losses at the interfaces as well as in the bulk of solution-processed double cation perovskite thin films using photoluminescence quantum yield measurements. Furthermore, the origin of these losses is investigated via morphological, microstructural, and compositional analysis and present possible mitigation strategies. The guideline will be beneficial for scientists working on randomly textured surfaces and provides a deeper understanding on this timely research topic. 相似文献
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Riming Sun Qiushuang Tian Mubai Li Hongze Wang Jingxi Chang Wenxin Xu Zihao Li Yuyu Pan Fangfang Wang Tianshi Qin 《Advanced functional materials》2023,33(6):2210071
Recently, organic–inorganic metal halide perovskite solar cells (PSCs) have achieved rapid improvement, however, the efficiencies are still behind the Shockley–Queisser theory mainly due to their high energy loss (ELOSS) in open-circuit voltage (VOC). Due to the polycrystalline nature of the solution-prepared perovskite films, defects at the grain boundaries as the non-radiative recombination centers greatly affect the VOC and limit the device efficiency. Herein, poly(vinylidene fluoride) (PVDF) is introduced as polymer-templates in the perovskite film, where the fluorine atoms in the PVDF network can form strong hydrogen-bonds with organic cations and coordinate bonds with Pb2+. The strong interaction between PVDF and perovksite enables slow crystal growth and efficient defect passivation, which effectively reduce non-radiation recombination and minimize ELOSS of VOC. PVDF-based PSCs achieve a champion efficiency of 24.21% with a excellent voltage of 1.22 V, which is one of the highest VOC values reported for FAMAPb(I/Br)3-based PSCs. Furthermore, the strong hydrophobic fluorine atoms in PVDF endow the device with excellent humidity stability, the unencapsulated solar cell maintain the initial efficiency of >90% for 2500 h under air ambient of ≈50% humid and a consistently high VOC of 1.20 V. 相似文献
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Chang Liu Luozheng Zhang Xianyong Zhou Jishu Gao Wei Chen Xingzhu Wang Baomin Xu 《Advanced functional materials》2019,29(47)
Perovskite solar cells (PSCs) are one of the most promising solar energy conversion technologies owing to their rapidly developing power conversion efficiency (PCE). Low‐temperature solution processing of the perovskite layer enables the fabrication of flexible devices. However, their application has been greatly hindered due to the lack of strategies to fabricate high‐quality electron transport layers (ETLs) at the low temperatures (≈100 °C) that most flexible plastic substrates can withstand, leading to poor performances for flexible PSCs. In this work, through combining the spin‐coating process with a hydrothermal treatment method, ligand‐free and highly crystalline SnO2 ETLs are successfully fabricated at low temperature. The flexible PSCs based on this SnO2 ETL exhibit an excellent PCE of 18.1% (certified 17.3%). The flexible PSCs maintained 85% of the initial PCE after 1000 bending cycles and over 90% of the initial PCE after being stored in ambient air for 30 days without encapsulation. The investigation reveals that hydrothermal treatment not only promotes the complete removal of organic surfactants coated onto the surface of the SnO2 nanoparticles by hot water vapor but also enhances crystallization through the high vapor pressure of water, leading to the formation of high‐quality SnO2 ETLs. 相似文献
