ADVANCED FUNCTIONAL MATERIALS
·
2024
·
IF 18.5
Zhenghao Liu,Yiming Li,Zijing Chen,Chengyu Tan,Xiangjin Du,Fubo Tian,Jiangjian Shi,Huijue Wu,Yanhong Luo,Dongmei Li,Qingbo Meng
Tin oxide (SnO 2 ) based on chemical bath deposition method (CBD-SnO 2 ) is considered as an ideal electron transporting layer for perovskite solar cells (PSCs), however, the research on precise regulation toward CBD-SnO 2 layer is lacking. Here, the study introduces a multifunctional molecule, potassium 2-(N-morpholino)ethanesulfonate (MES-K), on the surface of CBD-SnO 2 layer to synergistically modify the buried interface between the SnO 2 and perovskite. It is found that MES-K introduction can passivate interfacial defects, favor the perovskite crystal growth, and improve carrier transportation. 25.14% efficiency of small-size perovskite solar cells has been achieved with 24.45% efficiency of 1 cm 2 perovskite devices, with negligible hysteresis. Besides, unencapsulated devices based on CBD-SnO 2 can maintain > 95% of its initial efficiency after 2000 h storage at ambient environment, and > 90% after 1000 h LED illumination.
研究领域:
材料科学
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能源技术
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化学工程
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产品关联
DOI
高影响因子
Advanced Energy Materials
·
2025
·
IF 26
Chunjie Huang,Zhenghao Liu,Shiyu Jiang,Xiangjin Du,Chengyu Tan,Xinru Qin,Yuqi Cui,Rui Zhang,Yiming Li,Fubo Tian,Jiangjian Shi,Huijue Wu,Yanhong Luo,Dongmei Li,Qingbo Meng
Large area, dense, and uniform SnO 2 films with fewer defects are essential for high-quality perovskite films and efficient n-i-p typed perovskite modules. In this respect, based on the self-synthesized SnO 2 nanoparticles (NPs) 4,4′-bipyridine is introduced as a multifunctional interface modifier at the SnO 2 /perovskite interface. Both experimental and DFT calculation results reveal that, the incorporation of 4,4′-bipyridine can simultaneously passivate interfacial defects from the SnO 2 surface and perovskite bottom surface. Moreover, it can also facilitate charge carrier transportation. Based on blade-coating technique for large area perovskite modules, this strategy significantly enhances the interfacial quality of large-area SnO 2 films and crystal quality of large-area perovskite layers. As a result, the champion small-area cell (0.076 cm 2 ) presents the efficiency of 25.75% while the minimodule (22.9 cm 2 aperture area) exhibits the efficiency of 23.50% with a certified efficiency of 22.70%. Both small-area devices and modules exhibited excellent operation and thermal stabilities, demonstrating that this interface treatment is a promising approach for large-scale production of high-efficiency perovskite modules.
研究领域:
材料科学
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纳米技术
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光伏技术
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薄膜技术
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表面工程
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产品关联
DOI
高影响因子
ACS Applied Energy Materials
·
2026
·
IF 5.5
Ziming Fu,Lin Liu,Yueqi Zhou,Yin Zhang,Xinao Liu,Lin Luo,Zhenghong Xiong,Yongmei Gao,Chaoyan Ma,Aimin Chang,Yixiong Ji,Pengjun Zhao
The performance of formamidinium lead iodide (FAPbI3) perovskite solar cells is limited by insufficient bulk crystallinity and defect-rich grain boundaries, which drive nonradiative recombination and poor operational stability. Herein, we establish a comparative thiocyanate additive model to reveal how cation volatility governs additive functionality in FAPbI3 perovskites. Two representative additives are investigated: fully volatile NH4SCN and PEASCN, which contain a retainable, interface-active PEA+ component. In both systems, SCN− transiently coordinates with Pb2+, restructures precursor chemistry, and promotes phase-pure crystallization with enlarged grains and improved film quality. Their cationic components, however, follow distinct pathways during annealing. NH4+ is completely removed and therefore mainly enhances bulk crystallization, whereas PEA+ remains preferentially at grain boundaries and surfaces, where it introduces additional interfacial passivation and hydrophobic protection. As a result, NH4SCN- and PEASCN-based devices achieve champion efficiencies of 23.3 and 22.9%, respectively, together with markedly improved stability. This work identifies cation volatility as a key descriptor of thiocyanate additive function and provides a volatility-informed design principle for high-efficiency and durable perovskite solar cells.
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DOI
高影响因子
Advanced Science
·
2025
·Vol. 12
·期 14
·2407401
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IF 14.1
Qianyi Li,Dongyang Li,Zhiqi Li,Qiong Liang,Patrick W. K. Fong,Yu Han,Kuan Liu,Jiangsheng Yu,Peng Bai,Tao Zhu,Yang Bai,Guang Yang,Zhiwei Ren,Gang Li
Hybrid metal halide perovskite solar cells (PSCs) are emerging as highly competitive next-generation photovoltaics due to their excellent performance and low production cost. However, the construction of high-efficiency PSCs typically requires an inert nitrogen environment within a glove box, inadvertently increasing manufacturing costs and hindering the transition from lab-scale to industrial-scale production. In this work, an air ambient fabrication of pure α-phase FAPbI 3 PSCs with high-efficiency and stability, utilizing a dual-functional engineering strategy assisted by 3-Guanidinopropionicacid (3-GuA) is reported. 3-GuA assists in managing excess PbI 2 and promotes the formation of high-quality FAPbI 3 films via intermolecular exchange. Simultaneously, the existence of 3-GuA minimizes the defects and stabilizes the resulting perovskite films. As a result, the ambient-air fabricated PSCs achieve a power conversion efficiency (PCE) of 24.2% with negligible hysteresis and excellent stability. Additionally, these devices demonstrate superior reproducibility, offering valuable guidance for future advancements in this technology.
研究领域:
材料科学
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光伏技术
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产品关联
DOI
PubMed
高影响因子
Nature Communications
·
2026
·
IF 18.1
You Haoyu,Wang Xuemeng,Zhao Denglin,Li Guangyan,Yang Huifang,Bai Jiangxiao,Zou Yatao,Zhang Fei,Debroye Elke,Chen Gaoyu,Xu Weidong
Strong quantum confinement can fundamentally reshape excitonic processes and radiative recombination in perovskite quantum dots (QDs), yet accessing this regime remains challenging in organic-inorganic hybrid FAPbI 3 nanocrystals because of their low crystallization barrier and rapid growth. Here, we report a coordination-mediated cold quenching strategy for synthesizing strongly quantum-confined FAPbI 3 QDs with tunable emission from 696 to 759 nm. The key step involves the injection of a precooled ethyl methacrylate (EMA, –70 °C), which rapidly lowers the reaction temperature while simultaneously retarding precursor conversion and suppressing QD regrowth. Such a strategy enables small QDs with an average size of 6.4 nm and a near-unity photoluminescence quantum yield. Representative light-emitting diodes based on these QDs deliver electroluminescence at 715 nm with a peak external quantum efficiency of 16.3%. This work provides a viable strategy for accessing ultrasmall hybrid perovskite QDs and advances the rational control of quantum confinement in soft ionic semiconductors.
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Tian Hou,Xiaoran Sun,Zhipeng Fu,Zhicheng Wang,Linhu Xiang,Yuelong Huang,Xiaojing Hao,Meng Zhang
Formamidinium lead triiodide (FAPbI 3 ) perovskite materials exhibit tremendous potential for next-generation solar cell applications. However, the fabrication of FAPbI 3 thin films usually requires a quenching treatment with a narrow processing window to achieve the desired morphology. Meanwhile, the use of methylammonium (MA)-containing additives assists the crystallization of FAPbI 3 but raises concerns on the device stability due to the residual MA cation. Here, we present a highly reproducible approach for quenching-free deposition of FAPbI 3 films without using any MA-containing additives. The bifunctional surfactant of benzalkonium chloride is found simultaneously contributing to a more compact multicrystalline films with reduced pinhole density, as well as a dramatically improved moisture stability of the quenching-free FAPbI 3 film. The corresponding FAPbI 3 perovskite solar cell exhibits a decent tolerance to minor pinholes and achieved a power conversion efficiency up to 23.5% under 1 sun illumination, and also presents improved storage and operational stability.
研究领域:
材料科学
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能源技术
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2026
·
IF 7.8
Yueli Liu,Zhijie Zheng,Jianeng Tao,Lizhi Wang,Wen Chen
Conventional ligand exchange strategies for FAPbI3 quantum dots (QDs) rely on polar solvents, which compromise colloidal stability and device performance. Herein, a ligand-mediated defect passivation strategy is proposed, in which 4-(trifluoromethyl)aniline (4-ATFB) is incorporated into the toluene-based solvent system during the purification of FAPbI3 QDs. The amino group of 4-ATFB coordinates with undercoordinated Pb2+ sites to passivate defects and optimize FA+ charge distribution, while outward-oriented trifluoromethyl group forms a barrier against moisture. The dual functionality stabilizes the lattice and suppresses defects during the purification process. Moreover, the carrier dynamics are significantly improved with 4-ATFB treatment, attributed to reduced defect density and suppressed trap-mediated losses, leading to enhanced radiative recombination. Consequently, the fabricated FAPbI3 QDs solar cells with 4-ATFB treatment exhibit a champion power conversion efficiency of 16.33%, representing a significant improvement over the control device (14.99%), together with exceptional operational stability that retains over 80% of the initial efficiency after 25 days of storage in an ambient atmosphere without encapsulation.
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DOI
PubMed
高影响因子
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
·
2026
·
IF 5.2
Guoqiang Zhang,Hao Hu,Jianping Yang,Junfeng Chen,Jiaxuan Hao,Ping Lin,Tiantian Liu,Lingbo Xu,Peng Wang,Xiaoping Wu,Can Cui
Perovskite photodetectors have attracted considerable attention due to their excellent optoelectronic properties and low-cost solution processability. However, the practical application of formamidinium lead iodide (CH(NH 2 ) 2 PbI 3 , FAPbI 3 ) based devices is severely hindered by high defect densities, phase instability, and non-radiative recombination losses. Herein, we demonstrate a simple and effective strategy to simultaneously address these challenges by incorporating polyethylene glycol (PEG) as a multifunctional additive into the FAPbI 3 precursor solution. Systematic optimization reveals that an optimal PEG concentration (2 mg/mL) significantly improves film crystallinity, enlarges grain size and reduces trap density, as evidenced by XRD, SEM, and SCLC analyses. The synergistic interaction mechanism was investigated by combining XPS and FTIR spectroscopy. Consequently, the optimized PEG-2 photodetector exhibits a ∼30% reduction in dark current, a ∼750% enhancement in photocurrent, and a ∼13-fold increase in on/off ratio compared to the pristine device. Both responsivity and detectivity are substantially improved across the visible spectrum, achieving a responsivity of 3.8 mA/W and a specific detectivity of 9.76 × 10 10 Jones. This work establishes PEG as a low-cost, multifunctional additive for defect passivation and morphology control in FAPbI 3 perovskites, offering a simple strategy toward high-performance, stable photodetectors and molecular guidance for rational polymer design.
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DOI
高影响因子
JOURNAL OF CRYSTAL GROWTH
·
2026
·
IF 2.5
Huaxing Gou,Yuzhe Zhang,Xu Liang,Yan Zhu,Haoyan Ye,Jianing Hu,Siyu Han,Jinkun Liu,Run Xu
The feature of metastable α -phase for FAPbI 3 at room temperature results in a relatively high growth temperature required for a pure α -phase FAPbI 3 single crystal. Here, we demonstrate a general strategy to selectively control the α - and δ -phase formation of FAPbI 3 single crystals over a wide temperature range (from 70 to 110 ℃) via inverse temperature crystallization. Phase selection is governed by solution saturation and seed type, while the introduction of formic acid can further lower the crystallization temperature without affecting this seed-mediated control. For improved stability during characterization, most structural and optoelectronic measurements were performed on FA 0.93 Cs 0.07 PbI 3 single crystals, while control experiments on undoped FAPbI 3 showed the same overall phase-selection trend. The resulting α -phase crystals exhibit good crystallinity (XRC FWHM = 0.041°) and long average carrier lifetimes (∼10 μs), demonstrating that the proposed strategy enables stable phase-selective growth and low-temperature single-crystal growth in the present system.
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DOI
高影响因子
Nature Communications
·
2026
·
IF 15.7
He Qingyun,Wang Junbo,Wu Mengyang,Zhong Chongyu,Li Lei,Zhao Xiangru,Ding Mengzhu,Yang Pinghui,Li Renzhi,Huang Wei,Qin Tianshi,Wang Fangfang
Formamidinium lead iodide (FAPbI 3 ) perovskite is a leading candidate for high-efficiency solar cells, but its application is hindered by the kinetic instability of its α-phase crystallization. Here, a highly effective strategy for directing the ordered crystallization of α-FAPbI 3 in the n-i-p architecture is developed by incorporating a self-assembled molecule (SAM) into the anti-solvent, unlike conventional phosphate-based SAMs requiring polar protic solvents, the -SCN SAM are processed from non-polar, aprotic solvents compatible with perovskite surfaces. An in-situ formed, self-assembled layer acts as a dynamic template, guiding the top-down crystallization process to yield highly ordered α-phase films. Through a series of in-situ measurements, it is rigorously demonstrated that this SAM treatment suppresses undesirable intermediate phases, accelerates the δ-to-α transition, and strategically slows crystal growth, promoting highly ordered films. This meticulously designed strategy culminates in high-quality perovskite films, enabling single-junction devices with a champion power conversion efficiency (PCE) of 26.18% (certified at 25.67%) and mini-modules with a PCE of 21.70%. These results underscore the power of directed self-assembly in fabricating highly efficient and stable n-i-p perovskite solar cells.
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DOI
PubMed
高影响因子
Materials Futures
·
2025
·
IF 10.8
Jiajia Du,Yilin Chang,Le Liu,Zhibin Yu,Qinglin Du,Wenfeng Yang,Yuan Qiu,Fushen Lu,Tonggang Jiu,Huanqi Cao
The disordered crystal growth and undesired degradation of perovskite films limit the further improvement of perovskite solar cells (PSCs) performance and their commercialization. Herein, an in situ modulation strategy is proposed for preparing high-quality and stable perovskite film through adjustment of phase transformation kinetics. Benefiting from the in situ reaction between chloroformamidinium hydrochloride (ClFACl) and FA cations, the impurity intermediate phase in the perovskite film is inhibited and the α-FAPbI3 phase is induced to grow along a preferred (001) orientation. Furthermore, the introduction of ClFACl and in situ formation of guanidinium salts (FA-Gua) strengthen the intermolecular interactions in the interior of crystals, which restrains the α-phase degradation of the as-prepared perovskite films under humid and thermal treatments. With crystal orientation optimization and defects reduction, the PSCs with in situ formed FA-Gua yield a champion efficiency of 25.85% and demonstrate excellent phase stability under long-term thermal and humid ageing conditions. This in situ chemical modulation strategy expands the avenue toward optimization of crystallization orientation and α-phase stabilization, promoting the development of PSCs with enhanced performance and stability.
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Xuanling Liu,Han Zhong,Xuanyu Wang,Jianfei Yang,Ziling Zhang,Jianhua Han,Dan Oron,Hong Lin
Regulating strain in perovskite films via utilizing the crystal structure relationship between solid-phase materials (SPMs) and perovskite is an effective method to achieve high-performance perovskite solar cells. It is crucial to investigate and manipulate the heterointerfaces between perovskites and SPMs since the mismatched crystal structure and energy band structure of SPMs will bring recombination sites to the heterointerfaces. In this work, CdS-modified PbS nanosheets (CPS) were prepared through cation exchange with (200)-preferred PbS nanosheets. The wide-band gap CdS charge-blocking layer of CPS nanosheets distributed at the grain boundaries effectively passivates the heterointerfaces in FAPbI3-CPS heterostructures (FAPI-CPS). Further, it potentially blocks carrier transportation and suppresses carrier recombination at grain boundaries and in FAPbI3-PbS nanosheet heterointerfaces. Attributed to the CdS layer, the FAPI-CPS devices achieve an enhanced power conversion efficiency. CPS nanosheets with an interplanar spacing slightly smaller than that of α-FAPbI3 could provide compressive strain to FAPbI3 at the FAPI-CPS heterointerfaces, leading to significantly improved device stability. The unencapsulated FAPI-CPS solar cells maintained 92% of their initial PCE after being stored at 20 ± 5 °C, 20 ± 5% RH for 2500 h.
研究领域:
材料科学
·
能源技术
·
物理化学
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DOI
高影响因子
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