Sustainable Energy & Fuels
·
2025
·
IF 4.1
Guangli Liu,Haoju Li,Changzhong Wang,Yuhang Liang,Cheng Huang,Yaochen Xie,Longxiang Luo,Yannan Qian
Despite the advantages of good thermal stability and low cost, CsPbIxBr3−x all-inorganic carbon-based perovskite solar cells (C-IPSCs) still experience significant non-radiative recombination at the buried interface between the electron transport layer (ETL) and the perovskite, resulting in substantial energy losses that limit the power conversion efficiency (PCE) of C-IPSCs. Herein, a dual-passivation buried interface molecular bridge was constructed between the SnO2 and CsPbIxBr3−x layers by introducing 1-carboxymethyl-3-methylimidazolium chloride (HOOCMIMCl) to minimize interface defects and reduce non-radiative recombination. The results demonstrated the COOH groups and imidazolium cations in HOOCMIMCl can be simultaneously anchored on the surfaces of SnO2 and CsPbIxBr3−x perovskite layers, effectively passivating oxygen vacancies (Vo) on the SnO2 surface and the uncoordinated Pb2+ in the perovskite film. Meanwhile, after introducing dual-passivation buried interface molecular bridges, the energy barrier between the SnO2 and CsPbIxBr3−x layers was reduced, facilitating rapid carrier transport, while the crystallization of the perovskite film was also promoted, resulting in larger grain sizes and smoother films. In addition, the hydrogen bonding formed between the N–H groups and the CsPbIxBr3−x perovskite can suppress I− migration, releasing residual stress and enhancing the stability of the crystal structure. Compared to control CsPbIxBr3−x C-IPSCs with a PCE of 12.89% and Voc of 1.09 V, the champion target C-IPSCs exhibited significantly higher performance, with a PCE of 15.51% and Voc of 1.19 V. The unencapsulated target C-IPSCs can maintain 82% of their initial PCE after 1000 hours in a low-humidity air environment (T = 25 °C, RH = 20–25%), and 83.5% of the initial PCE after aging 200 hours in an N2 atmosphere at T = 85 °C.
研究领域:
光伏技术
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材料科学
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纳米技术
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固体物理
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可再生能源
✓ 已验证
产品关联
DOI
高影响因子
Advanced Energy Materials
·
2022
·Vol. 12
·期 20
·2200417
·
IF 29.698
Yao Dong,Wenjian Shen,Wei Dong,Cong Bai,Juan Zhao,Yecheng Zhou,Fuzhi Huang,Yi-Bing Cheng,Jie Zhong
The interfacial properties for the buried junctions of the perovskite solar cells (PSCs) play a crucial role for the further enhancement of the power conversion efficiency (PCE) and stability of devices. Delicate manipulation of the interface properties such as the defect density, energy alignment, perovskite film quality, etc., guarantees efficient extraction and transport of photogenerated carriers. Herein, chlorobenzenesulfonic potassium salts are presented as a novel multifunctional agent to modify the buried tin oxide (SnO 2 )/perovskite interface for regular PSCs. The increasing number of carbon-chlorine bonds (C Cl) in 2,4,5-trichlorobenzenesulfonic potassium (3Cl-BSAK) exhibit efficient interaction with uncoordinated Sn, effectively filling oxygen vacancies in the SnO 2 surface. Importantly, synergistic effects of the functional group-rich organic anions and the potassium ion are achieved for reduced defect density, carrier recombination, and hysteresis. A champion PCE of 24.27% and the open-circuit voltage ( V OC ) up to 1.191 V for modified devices are obtained. The unencapsulated devices maintain 80% of their initial PCE after aging at 80 °C for 800 h in the atmosphere and 95% after aging for 100 d. With 3Cl-BSAK decoration, a high efficiency semitransparent PSC with a PCE of 12.83% and an average visible light transmittance (AVT) over 27% is also obtained.
研究领域:
光伏技术
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材料科学
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能源材料
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半导体界面
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可再生能源
✓ 已验证
DOI
高影响因子
Nature Photonics
·
2025
·
IF 32.9
Gao Yuping,Liu Hang,Song Zonglong,Chen Yu,Yang Liu,Hu Ziyang,Zou Yu,Chen Yongsheng,Liu Yongsheng
Achieving uniform crystallization across both top and buried interfaces in perovskite films is crucial for unlocking their full photovoltaic potential, yet remains an unresolved challenge. The buried interface, in particular, suffers from poor crystallization relative to the top surface, resulting in suboptimal crystal quality and increased defect densities. Here we propose a one-step strategy to induce the spontaneous formation of near-phase-pure two-dimensional perovskites at the buried interface via the introduction of organic cation halide salts in the perovskite precursor solution. Single-crystal structure analysis highlights the pivotal role of molecular engineering in facilitating the spontaneous formation of buried two-dimensional perovskite phases. The low dipole moments and planar rigidity structures of organic spacers promote their aggregation at perovskite grain boundaries, followed by their migration to the film’s bottom interface. The two-dimensional perovskite layer simultaneously promotes uniform crystallization and efficient defect passivation at the buried interface, leading to a power conversion efficiency of 26.31% (certified 26.02%). Unencapsulated devices retain 95% of their initial power conversion efficiency after 1,000 hours of continuous illumination.
研究领域:
光伏技术
·
材料科学
·
纳米技术
·
半导体器件
·
可再生能源
✓ 已验证
产品关联
DOI
高影响因子
Nature Photonics
·
2025
·
IF 32.9
Zhang Jiakang,Yan Wenjian,Li Zhipeng,Jiang Haokun,Peng Cheng,Lan Mengjiao,Sun He,Yang Jinxian,Wang Yanbo,Li Chongwen,Pang Shuping,Zhou Zhongmin
The commercialization of perovskite photovoltaics faces significant hurdles due to device degradation under environmental stressors, such as illumination, humidity and heat, which represents a core challenge for industrial applications. Here we present a conformational engineering strategy targeting the buried interface of perovskite solar cells and based on the structural evolution of additives—from 1,1-diphenylethylene to 1-octyl-2-(1-phenylvinyl)benzene and diethylamino hydroxybenzoyl hexyl benzoate. We decouple the contributions of the additives, including ultraviolet shielding, strain regulation and chemical passivation. In conjunction with in situ characterization, we reveal that dynamic interfacial strain regulation plays a major role in improving device stability during light–dark cycling. Our devices achieve power conversion efficiencies of 26.47% and 22.67%, for active areas of 0.09 cm 2 and 20.5 cm 2 , respectively. Under maximum power point tracking, small-area devices maintain 96.2% of their initial power conversion efficiency after 1,132 h of testing in ISOS-L-1I (continuous illumination) and 88.8% after 348 h in ISOS-LC-1 (12-h day–night cycling). This research establishes an innovative design paradigm for stable and efficient perovskite solar cells through a multifunctional strategy driven by conformational engineering.
研究领域:
光伏技术
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材料科学
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能源材料
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纳米技术
·
器件物理
✓ 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）