ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Yanyan Li,Wei Li,Yalun Xu,Ruiming Li,Tian Yu,Qianqian Lin
Perovskite solar cells are one of the most promising thin-film photovoltaic techniques, which have an unprecedented progress in the last decade. It is well-recognized in the perovskite community that nonradiative recombination losses and the open-circuit voltage deficit are the dominant limiting factors to further improve the device efficiency. Recently, multiple groups have reported that lead iodide can effectively passivate both perovskite grain boundaries and the interfaces between perovskite and charge transport layers. However, most of the excess PbI2 was processed with solution methods and formed PbI2 grains, which cannot cover perovskite layers completely. It is also very challenging to spin-coat PbI2 layers directly on perovskites, which requires orthogonal solvents. In this work, we deposit additional PbI2 thin layers directly on perovskite thin films via thermal evaporation. The impact of PbI2 layers on the perovskite thin films and devices is systematically investigated. It was found that the evaporated PbI2 thin films can effectively reduce the nonradiative recombination and enhance the device performance. The optimized thickness of the PbI2 layer was determined to be around 10 nm, which results in a relatively high Voc of 1.18 V and power conversion efficiency of 21.52%.
研究领域:
材料科学
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光伏技术
·
界面工程
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产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2016
·
IF 3.15
Jiajia Jiang,Hai jun Tao,Shanlong Chen,Bin Tan,Ning Zhou,Lumin Zhu,Yuan Zhao,Yuqiao Wang,Jie Tao
Sequential spin-coating procedure is a widely adopted strategy to prepare CH 3 NH 3 PbI 3 on mesostructured TiO 2 electrode for organolead halide perovskite-based solar cells. However, this method suffers from the rough surface and excessively residual PbI 2 in the resulting perovskite film, deteriorating the device performance seriously. Herein, a facial modified sequential solution deposition method, by introducing an as-prepared CH 3 NH 3 PbI 3 and PbI 2 film before the traditional two-step process, was proposed to fabricate the perovskite-based solar cell with smooth morphology and trace amount of remaining PbI 2 . The optimal as-prepared film introduced improves the efficiency of CH 3 NH 3 PbI 3 solar cells from 9.11% to 11.16%. The enhancement of device performance can be attributed to the increased light absorption ability and decreased recombination rate of carriers in CH 3 NH 3 PbI 3 absorber.
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
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2026
·
IF 9.6
Jinming Jiang,Qian Zhang,Zhu Ma,Xiaojiao Xiang,Zetao Du,Zhuo Lv,Bo Chen,Zhengduo Xia,Jixin Nie,Yunmeng He,Chengxin Han,Xialing Sun,Yan Xiang,Cheng Huang,Zedong Lin,Yu Hu,Ding Zheng,Junsheng Yu,Kuan Sun
The bisamide ligand of 4Cl-PA is introduced into the PbI 2 precursor to enable multimodal coordination strategy. • Macroporous PbI₂ template with large grains is obtained, facilitating organic cation infiltration and conversion. • The optimized PSCs achieves a champion PCE of 22.73% and Jsc of 25.75 mA cm −2 . Sequential deposition is widely used in perovskite/silicon tandem solar cells and perovskite PV modules for its flexibility in composition tuning and film quality control. However, owing to its CdI 2 -type layered structure, PbI 2 easily forms dense films, which impede organic cation infiltration and reaction, resulting in poor perovskite film quality. Herein, the dual-modal molecule 4Cl-PA was introduced into the PbI 2 precursor solution. It was found that the unique conformation of the two adjacent amide groups enables dual-mode synergistic coordination to PbI 2 , thereby effectively suppressing the tight stacking of PbI 2 . Moreover, the Cl atom enhances the molecular dipole moment, facilitating anchoring at polar sites on PbI 2 nuclei, while π-π stacking of the benzene rings improves film moisture resistance. This dual-mode coordination induces a loose PbI 2 template with macroporous structure, optimizes the subsequent reaction with organic cations, and then affords high-quality perovskite films. TRPL measurements showed that the carrier lifetime increased to 161 ns, which indicates improved charge transport and suppressed non-radiative recombination within the perovskite films. As a result, the perovskite solar cells regulated by 4Cl-PA achieved a champion PCE of 22.73% and a J sc of 25.75 mA cm −2 . This work provides a practical strategy for tailoring the pore structure of PbI 2 films to facilitate complete organic cation infiltration in sequential deposition. Download: Download high-res image (97KB) Download: Download full-size image
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DOI
高影响因子
Solar RRL
·
2025
·
IF 4.7
Peng Gao,Jianxin Xu,Zhanfei Zhang,Lijie Sun,Wenhua Li,Yonggang Guo,Kai Wang,Dayong Qiao,Binghe Ma,Weizheng Yuan,Tao Ye
Perovskite-silicon tandem solar cells (PSTSCs) represent one of the most promising candidates for next-generation photovoltaics, offering the potential to surpass the Shockley–Queisser efficiency limit of single-junction devices due to their tunable bandgap and strong light absorption. However, residual PbI 2 formed from incomplete crystallization in the perovskite top subcell introduces nonradiative recombination centers, structural inhomogeneity, and interfacial instability, thereby limiting device performance. In this work, we proposed a chemical polishing strategy based on a dimethyl sulfoxide and chlorobenzene mixed solvent system that selectively removes surface PbI 2 without disrupting the perovskite lattice. This approach effectively reduces trap-state density, promotes grain boundary fusion, enhances photoluminescence intensity, and extends carrier lifetime. As a result, the fabricated PSTSCs achieve a certified power conversion efficiency of 31.71%, accompanied by an increase in open-circuit voltage from 1.821 V to 1.839 V and a marked suppression of interface-related recombination losses. This study highlights a facile yet effective interfacial engineering strategy that mitigates residual PbI 2 and supports the development of high-efficiency, stable perovskite-silicon tandem photovoltaics.
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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化学工程
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产品关联
DOI
高影响因子
Chinese Physics B
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2018
·Vol. 27
·期 3
·038402
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IF 1.321
Wei-Kang Xu,Feng-Xiang Chen,Gong-Hui Cao,Jia-Qi Wang,Li-Sheng Wang
To date, many efforts have been made to improve the performance of paintable carbon-based (PC-based) perovskite solar cells (PSCs). Though great progress has been achieved, their power conversion efficiencies are still relatively low compared with hole-transport-materials-based PSCs. General research on influencing factors of performance in PC-based PSCs is still insufficient. In this work, PC-based PSCs were fabricated in ambient air and four groups of controlled experiments were performed in which the PbI2 layers were prepared with or without antisolvent extraction treatment. These four groups of experiments were designed to find out the effect of different influencing factors on PC-based PSCs performance, for example, PbI2 residual, the surface morphology of the perovskite film, the surface roughness of the perovskite film, and the contact status of the perovskite/carbon electrode interface. With a systematic analysis, we demonstrated that the contact status of the perovskite/carbon electrode interface played a vital role in PC-based PSCs, and a flat, smooth perovskite surface could help to improve this contact status significantly. Besides, on the precondition of a poor contact interface, no PbI2 residual and a good surface morphology only brought limited benefits to the performances of PC-based PSCs.
研究领域:
材料科学
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能源科学
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产品关联
DOI
高影响因子
Sustainable Energy & Fuels
·
2017
·Vol. 1
·期 6
·1358-1365
·
IF 0
Li Xiao,Jia Xu,Jing Chen,Jicheng Luan,Yi Yang,Bing Zhang,Jianxi Yao,Songyuan Dai
The remnant PbI2 at the mesoporous-TiO2 (m-TiO2)/CH3NH3PbI3 interface can act as an interface modification layer for high-efficiency perovskite solar cells (PSCs). In this study, we adopted Pb(CH3COO)2·3H2O (PbAc2) to control the amount of remnant PbI2 at the m-TiO2/CH3NH3PbI3 interface. The characterization results demonstrate that the amount of remnant PbI2 could be controlled by the concentration of PbAc2 solution without influencing the crystallographic textures of CH3NH3PbI3 films. By adjusting the PbAc2 solution concentration, the optimized PSC can achieve a 15% enhancement of PCE in the case of using a two-step method for CH3NH3PbI3 preparation. Under the circumstances of using an anti-solution method, it still displayed a 10% enhancement of the average PCE for 10 individual PSCs with PbAc2 (13.6% to 15.0%). The steady-state photoluminescence (PL), time-resolved photoluminescence (TR-PL) and open-circuit voltage decay results demonstrated that the remnant PbI2 could reduce carrier recombination at the m-TiO2/CH3NH3PbI3 interface. Meanwhile, the enhancement of the open-circuit voltage was achieved for PSCs with PbAc2.
研究领域:
材料科学
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光伏技术
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物理化学
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产品关联
DOI
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Zhang Qian,Li Yixian,Ma Zhu,Du Hao,Song Mingyu,Gou Fuchun,Lv Zhuo,Xiang Dengqian,Chen Bo,Liu Kai,Mao Maozhu,Cheng Can,Du Zhuowei,Chen Yi,You Wei,Yang Junbo,Chen Leyi,Yin Qiaohuan,Huang Cheng,Xiang Yan,Yu Jian,Sun Kuan,Chen Jiangzhao,Feng Wenyong,Lin Zedong
The sequential preparation of perovskite solar cells (PSCs) has received widespread concern for its use in large-scale perovskite modules and perovskite/silicon tandem solar cells. However, the instability of the PbI 2 precursor solution and the incomplete reaction of ammonium salts hinder the industrialization of PSCs. Here, by introducing phthalamide (PA) into PbI 2 solution, the carbonyl oxygen of PA molecules undergoes a bidentate coordination reaction with Pb 2+ to form an octahedral coordination structure, and the nitrogen atom in the -NH 2 group exhibits weakly acidic properties due to the conjugation effect. These dual mechanisms synergistically suppress the hydrolysis of PbI 2 . This dual-functional modulation strategy not only inhibits aging of the PbI 2 precursor solution, but also promotes thorough reaction between PbI 2 and organic ammonium salts. Moreover, carbonyl (C=O) and amino (−NH 2 ) groups generate van der Waals forces through dipole-dipole interactions, promoting intermolecular interactions within the precursor solution, which facilitates the formation and growth of crystal nuclei. π-electrons in benzene ring further contribute to van der Waals forces via π-π stacking, improving the smoothness and coverage of the perovskite film. Notably, the fabricated PSCs achieved a current density ( J SC ) of 26.70 mA cm −2 , and devices retained 95 % of its initial PCE after 1000 h of nitrogen exposure. Aging-resistant PbI 2 precursor tactic enable reproducible, high-efficiency, and low-cost perovskite solar cells.
研究领域:
材料科学
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光伏技术
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可再生能源
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无机化学
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薄膜技术
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产品关联
DOI
高影响因子
IEEE SENSORS JOURNAL
·
2026
·
IF 4.5
Jia-Qi Wang,Qi-Zhi Cai,Ben Li,Hua-Long Du,Na-Na Du,Yun-He Zhang,Jia-Jun Diao,Qi Wang
This work proposes a U-shaped fiber-optic sensor with a structure of an Au film / PbI2 & Au nanoparticles (AuNPs). This is an applicable example of using AuNPs-modified PbI2 in surface plasmon resonance (SPR) sensors, as studies have shown that this nanohybrid material has excellent optical properties. Finite element method (FEM) simulations verify that the presence of PbI2 could potentially enhance the evanescent wave electric field, leading to amplified resonance signals and improved sensitivity. Results show that Au/PbI2 structure brings about a sensitivity increase of 2.39 times compared to pure Au film structure. Subsequent experimental studies introduced AuNPs-modified PbI2 to induce SPR & local surface plasmon resonance (LSPR) coupling mechanisms. The sensor exhibits an exceptionally high sensitivity of 22666.39 nm/RIU within the narrow refractive index (RI) range of 1.36772–1.37673, while maintaining a sensitivity of 4835.61 nm/RIU in the wider range of 1.33139–1.35775. The sensor possesses good temperature stability. The relative standard deviation (RSD) of resonance wavelength under identical RI condition is 1.048% and the temperature response is about 0.661 nm/°C within 23-51°C. Repeatability test results indicate that the sensor exhibits good repeatability. RSDs of resonance wavelengths are 0.997%, 0.686%, 0.942%, 0.587%, 0.521%, and 0.949% within the RI range of 1.33139–1.37673. It is evident that the proposed sensor holds promise in the field of biomass measurement, thereby signifying that AuNPs-modified PbI2 possesses considerable application prospects in future optoelectronic devices.
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DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2026
·
IF 19.9
Jingxian Zhong,Zijian Gao,Yifan Fu,Xiaoxiao Yang,Guangjie Gu,Zhen Li,Xiaoran Gong,Meng Nie,Kuibo Yin,Ning Wei,Litao Sun
Mechanical strain provides an effective route to modulate the properties of two-dimensional(2D) materials, yet its intrinsic coupling to optical and electronic responses remains poorly quantified due to the difficulty of the experimental platform. Here, an in situ growth-location-measurement approach based on a flexible selection rod is developed, enabling precise uniaxial straining of freestanding 2D nanosheets together with correlated mechanical, optical, and electrical measurements on the same specimen. We identify an intrinsically ultralow in-plane Young's modulus in PbI 2 nanosheets (≈20 GPa), establishing an experimental benchmark for mechanically flexible 2D materials. Correlated in situ strained Raman spectroscopy, photoluminescence, and electrical transport measurements reveal a pronounced mechano-optoelectronic coupling, in which lattice vibrations, electronic structure, and carrier transport are coherently modulated by tensile strain. The optoelectronic response becomes ultra-highly strain-tunable, with the photoresponsivity enhanced by nearly 20-fold to values exceeding 3 A/W under moderate strain. This work establishes a general experimental paradigm for investigating strain-engineered optoelectronic phenomena in low-dimensional materials.
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DOI
高影响因子
PROGRESS IN PHOTOVOLTAICS
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2017
·Vol. 25
·期 12
·1022-1033
·
IF 6.726
Jie Xu,Ziyang Hu,Like Huang,Xiaokun Huang,Xianyu Jia,Jing Zhang,Jianjun Zhang,Yuejin Zhu
The development of organometal halide perovskite solar cells has grown rapidly and the highest efficiency of the devices has recently surpassed 22%. Because these solar cells contain toxic lead, a sustainable strategy is required to prevent environmental pollution and avoid healthy hazard caused by possible lead outflow. Here, in situ recycling PbI 2 from thermal decomposition CH 3 NH 3 PbI 3 perovskite films for efficient perovskite solar cells was developed. The thermal behavior of CH 3 NH 3 PbI 3 perovskite and its individual components were examined by thermogravimetric analysis. By optimizing the process of thermal decomposition CH 3 NH 3 PbI 3 film, the complete conversion from CH 3 NH 3 PbI 3 to pure PbI 2 layer with a mesoporous scaffold was achieved. The mesoporous structure readily promotes the conversion efficiency of perovskite and consequently results in high-performance device. A perovskite crystal growth mechanism on the mesoporous PbI 2 structure was proposed. These results suggest that in situ recycled PbI 2 scaffolds can be a new route in manipulating the morphology of the perovskite active layer, providing new possibilities for high performance. Meanwhile, the risk of lead outflow can be released, and the saving-energy fabrication of efficient solar cells can be realized.
研究领域:
材料科学
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环境科学
·
能源技术
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2015
·
IF 2.711
Ying Zhao,Jian Liu,Xinrong Lu,Yandong Gao,Xiaozeng You,Xiangxing Xu
Perovskite-structured organic–inorganic materials such as CH 3 NH 3 PbI 3 are attracting much interest in the scientific community because of their abilities to function as revolutionary light harvesters and charge transfer materials for solar cells. To achieve high power conversion efficiency (PCE), it is critical to optimize the perovskite film layer. This paper reports the temperature and concentration controls on the two-step solution process. A diffusion-controlled growth mechanism is proposed for this process in tuning the morphology and purity of the perovskite film, which are proven to be important factors contributing to the photovoltaic performance. The highest PCE of 11.92% is achieved with an optimized perovskite crystal size of ∼150 nm and an appropriate amount of residual PbI 2 . This study sheds light on the design and fabrication of highly efficient, low-cost, solution-processed perovskite solar cells.
研究领域:
材料科学
·
太阳能电池技术
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DOI
高影响因子
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
·
2019
·Vol. 125
·期 5
·287
·
IF 1.784
Ding Simin,Xiao Xuling,Liu Shuhua,Wu Jie,Huang Zongyu,Qi Xiang,Li Jun
In this paper, MoS 2 /PbI 2 heterostructures were synthesized via a two-step synthesis method using vapor deposition and direct water bath heating. Raman spectroscopy and Atomic Force Microscope were used to characterize the MoS 2 /PbI 2 heterostructures. The Kelvin probe force microscope was characterized the surface potential of MoS 2 /PbI 2 heterostructures. It has shown that the surface potential has undergone a significant change transfer in the interlayer between MoS 2 and PbI 2 , which means that at the interface charge transfer occurs and the electrons transfer from MoS 2 to PbI 2 . These results provide a theoretical basis for further understanding of the electrical properties of MoS 2 /PbI 2 heterostructures.
研究领域:
材料科学
·
纳米技术
·
凝聚态物理
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DOI
高影响因子
危险品化学品经营许可证（带存储）