CHEMICAL ENGINEERING JOURNAL
·
2020
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IF 10.652
Shanshan Yu,Hongli Liu,Shirong Wang,Hongwei Zhu,Xiaofei Dong,Xianggao Li
FAPbI 3 has been greatly developed in Perovskite solar cells (PSCs) profiting from their narrow bandgap, high panchromatic absorption and long carrier diffusion length. Unfortunately, the phase instability of FAPbI 3 -based perovskite restricts its further development in PSCs. Here, hydrazinium cation (HA + : NH 2 NH 3 + ) is incorporated into FAPbI 3 -based perovskite to obtain novel 1D/3D hybrid dimension structure with stable α -FAPbI 3 for the first time. The strong hydrogen bonding of HA + increases the crystallinity and grain size of perovskite. Furthermore, SEM and TEM reveal that the new HA based 1D-phase (1D-HA-phase) exists like “rivet” passivating among the grain boundary of 3D perovskite, forming 1D/3D hybrid dimension structure contributing to the stability of FAPbI 3 -based perovskite. Confocal fluorescence microscopy, time-resolved photoluminescence spectroscopy and Kelvin probe force microscope measurements reveal that the trap state can be effectively restrained and the non-radiative recombination is largely suppressed in HA + mixed FAPbI 3 -based perovskite film with 1D-HA-phase. Finally, stable α -FAPbI 3 -based perovskite and its film with high crystallinity, smooth surface morphology, excellent photovoltaic performance and few defects are obtained. PSC using (FAMACs) 0.85 HA 0.15 perovskite achieves a power conversion efficiency of 21.20% which can retain 90% at room temperature in ambient environment for 2520 h.
研究领域:
材料科学
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能源科学
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光伏技术
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
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IF 8.2
Yumeng Zhang,Kexin Zhang,Ruikai Zhang,Xinbo Shi,Guofu Zhou,Jun-Ming Liu,Yue Jiang,Zhen Wang,Jinwei Gao
Formamidinium lead iodide (FAPbI3)-based perovskites are promising photoabsorber materials owing to their optimal bandgap and excellent photothermal stability. However, their complex crystallization behavior during blade-coating presents challenges for scalable fabrication, leading to poor perovskite film morphology and uniformity, which adversely affect the performance and stability of perovskite solar cells (PSCs). Herein, a two-dimensional (2D) perovskite seed layer was introduced onto the SnO2 electron transport layer within a conventional n-i-p device architecture. This seed layer was employed to provide heterogeneous nucleation sites for and to induce the bottom-up-oriented growth of [PbI6]4– octahedra, thereby facilitating the formation of the photoactive α-FAPbI3 phase with enhanced crystallinity and film uniformity. As a result, PSCs with an active area of 2.5 × 2.5 cm2 were fabricated, achieving a power conversion efficiency (PCE) of 22.03% and an open-circuit voltage (VOC) of 1.10 V. Furthermore, over 80% of the initial efficiency was retained after 2000 h of ambient storage (relative humidity ≈ 5%, temperature ≈ 25 °C) without encapsulation, indicating excellent long-term stability. Through this approach, a viable and scalable pathway has been established for the fabrication of high-quality α-FAPbI3 films, offering significant potential for the advancement of efficient and stable PSCs.
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产品关联
DOI
PubMed
高影响因子
Nano-Micro Letters
·
2025
·Vol. 18
·期 1
·14
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IF 36.3
Huang Yu-Hua,Zou Su-Yan,Sheng Cong-Yi,Fang Yu-Chuang,Wang Xu-Dong,Wei Wei,Li Wen-Guang,Kuang Dai-Bin
A lattice-anchoring strategy using low-dimensional perovskite addresses structural instability in α-formamidinium lead iodide (FAPbI 3 ) by matching crystal lattice, mitigating residual stress and tensile strain.
Enhanced Pb-I bonding strength and reduced lattice strain improve structural stability and carrier mobility-lifetime product, enabling efficient charge transport.
Optimized X-ray detectors achieve high sensitivity (1.83 × 10 5 μC Gy air –1 cm –2 ), low detection limit (27.6 nGy air s –1 ), and stable performance under prolonged irradiation.
研究领域:
材料科学
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凝聚态物理
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半导体器件
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辐射探测
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纳米科技
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Laser & Photonics Reviews
·
2025
·
IF 10
Namatullah Nizamani,Xin Chen,Yan-Hui Lou,Run-Jun Jin,Kai-Li Wang,Chun-Hao Chen,Jing Chen,Yu Xia,Lei Huang,Zhao-Kui Wang
In the pursuit of high-performance FAPbI 3 -based perovskite solar cells, the two-step sequential deposition method has garnered significant attention due to its superior control over film crystallization dynamics, critical for achieving uniform, and compact perovskite layers. However, the rapid reaction between PbI 2 and FAI often results in residual PbI 2 clusters, which accelerate the degradation of perovskite solar cells (PSCs). Herein, the dual-site molecular additive 1-aminonaphthalene-6-sulfonic acid (ANSA) is introduced to achieve fast nucleation and slow crystallization, thereby enabling the formation of high-quality FAPbI 3 perovskite films. ANSA coordinates with both PbI 2 and DMSO, facilitating the formation of an improved PbI 2 (DMSO) intermediate phase, enabling a more uniform and complete conversion of PbI 2 into the perovskite phase. Additionally, the amino and sulfonic acid functional groups of ANSA contribute to the passivation of undercoordinated Pb 2+ ions, thereby perovskite films with lower trap densities and larger grain sizes are achieved. Consequently, the power conversion efficiency (PCE) increases from 23.27% in the pristine device to 25.79% for the ANSA-treated device. Furthermore, device stability is significantly improved with the modified device retaining 95% of its original PCE after 1500 h of storage.
研究领域:
材料科学
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光伏技术
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纳米材料
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表面化学
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能源材料
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）