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463 results on '"Pang, Shuping"'

11. Oxygen Vacancy Mediation in SnO2 Electron Transport Layers Enables Efficient, Stable, and Scalable Perovskite Solar Cells

Author

Zhao, Qiangqiang, primary, Zhang, Bingqian, additional, Hui, Wei, additional, Su, Zhenhuang, additional, Wang, Han, additional, Zhang, Qi, additional, Gao, Kun, additional, Zhang, Xiaoxu, additional, Li, Bo-han, additional, Gao, Xingyu, additional, Wang, Xiao, additional, De Wolf, Stefaan, additional, Wang, Kai, additional, and Pang, Shuping, additional

Published
2024
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12. Anion Binding Interaction Enhances the Robustness of Iodide for High-Performance Perovskite Solar Cells

Author

Huang, Qi, primary, Zhao, Qiangqiang, additional, Zhang, Bingqian, additional, Du, Xiaofan, additional, Liu, Dachang, additional, Ji, Hongpei, additional, Gao, Caiyun, additional, Sun, Xiuhong, additional, Wei, Yijin, additional, Shao, Zhipeng, additional, Ding, Jianxu, additional, Wang, Xiao, additional, Cui, Guanglei, additional, and Pang, Shuping, additional

Published
2024
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14. Spatial Conformation Engineering of Aromatic Ketones for Highly Efficient and Stable Perovskite Solar Cells

Author

Jiang, Xiaoqing, Zhu, Lina, Zhang, Bingqian, Zheng, Likai, Wang, Linqin, Li, Pingping, Wang, Minhuan, Yang, Guangyue, Dong, Kaiwen, Li, Suying, Liu, Shiwei, Yin, Yanfeng, Wang, Haiyuan, Zakeeruddin, Shaik. M., Pang, Shuping, Sun, Licheng, Grätzel, Michael, and Guo, Xin

Abstract

Carbonyl-containing materials employed in state-of-the-art hybrid lead halide perovskite solar cells (PSCs) exhibit a strong structure-dependent electron donor effect that predominates in defect passivation. However, the impact of the molecular spatial conformation on the efficacy of carbonyl-containing passivators remains ambiguous, hindering the advancement of molecular design for passivating materials. Herein, we show that altering the spatial torsion angle of aromatic ketones from twisted to planar configurations, as seen in benzophenone (BP, 27.2°), anthrone (AR, 15.3°), and 9-fluorenone (FO, 0°), leads to a notable increment of the electron cloud density around the carbonyl group, thus improving the passivation ability for lead-based defects. Consequently, the PSC performance also relies on the torsion angle of the aromatic ketones, with the coplanar FO-based PSC achieving a highest power conversion efficiency (PCE) of 25.13% and retaining 92% of its initial efficiency after 1000 h of operation at the maximum power point under continuous 1-sun illumination (ISOS-L-1I). Moreover, a perovskite mini-module (14.0 cm2) containing FO exhibits a PCE of 20.19%. Our findings highlight the influence of molecular conformation on the passivation effect of the carbonyl group, offering deeper insight into the design and development of aromatic ketones as passivators for highly efficient and stable PSCs.

Published
2024
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16. Chemical Bath Deposition of Planar Nickel Oxide Films for Inverted Perovskite Solar Cells and Mini‐Modules.

Author

Sheng, Hongqing, Zhao, Qiangqiang, Sun, Xiuhong, Zhang, Bingqian, Huang, Qi, Wang, Kai, Wang, Li, and Pang, Shuping

Subjects
CHEMICAL solution deposition, NICKEL films, ENERGY levels (Quantum mechanics), SOLAR cells, NICKEL oxide
Abstract

Chemical bath deposition (CBD) is an economical method for the large‐scale preparation of high‐quality inorganic transport layers. In the field of the n–i–p perovskite solar cells (PSCs), the devices based on n‐type CBD–SnO2/CBD–TiO2 structures demonstrate significant advantages in efficiency and stability. However, using CBD method to deposit high‐quality planar p‐type NiOx is challenging due to the anisotropic growth of nickel‐based intermediate phase. Herein, NH4Cl additive is introduced to modulate the intermediate phase by adjusting the concentration of [Ni(H2O)x(NH3)6−x]2+ cations. As a result, dense and uniform NiOx films are finally obtained after thermal annealing. Simultaneously, the energy level and hole conductivity of NiOx materials are carefully controlled by adjusting the annealing temperature. Benefited from the excellent electronic properties of CBD–NiOx hole‐transport layer, the inverted PSCs based on MAPbI3, (FA0.98MA0.02)0.95Cs0.05Pb(I0.95Br0.05)3 achieve the power conversion efficiency of 19.75% and 23.30%, respectively. Furthermore, the unencapsulated devices maintain over 90% of their initial efficiency after continuous operation for 700 h. Scaling up this novel intermediate phase regulation CBD method yields a mini‐module with an active area of 14 cm2, achieving an efficiency of 19.36%. [ABSTRACT FROM AUTHOR]

Published
2024
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17. Tailored Supramolecular Interactions in Host–Guest Complexation for Efficient and Stable Perovskite Solar Cells and Modules.

Author

Yang, Guangyue, Liu, Xin, Wang, Linqin, Dong, Kaiwen, Zhang, Bingqian, Jiang, Xiaoqing, Yin, Yanfeng, Wang, Minhuan, Niu, Wenzhe, Zheng, Likai, Yu, Shitao, Liu, Shiwei, Zakeeruddin, Shaik M., Guo, Xin, Pang, Shuping, Sun, Licheng, Grätzel, Michael, and Wei, Mingyang

Subjects
SOLAR cells, DIPOLE moments, SURFACE defects, PEROVSKITE, PASSIVATION
Abstract

Host‐guest complexation offers a promising approach for mitigating surface defects in perovskite solar cells (PSCs). Crown ethers are the most widely used macrocyclic hosts for complexing perovskite surfaces, yet their supramolecular interactions and functional implications require further understanding. Here we show that the dipole moment of crown ethers serves as an indicator of supramolecular interactions with both perovskites and precursor salts. A larger dipole moment, achieved through the substitution of heteroatoms, correlates with enhanced coordination with lead cations. Perovskite films incorporating aza‐crown ethers as additives exhibited improved morphology, reduced defect densities, and better energy‐level alignment compared to those using native crown ethers. We report power‐conversion efficiencies (PCEs) exceeding 25 % for PSCs, which show enhanced long‐term stability, and a record PCE of 21.5 % for host–guest complexation‐based perovskite solar modules with an active area of 14.0 cm2. [ABSTRACT FROM AUTHOR]

Published
2024
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20. Interfacial Rivet to Fill Structural Defects: A Spacer Engineering Gift for 3D Solar Cells

Author

Jia, Wei, primary, Zhao, Qiangqiang, additional, Zhuang, Yan, additional, Wei, Yulin, additional, Tian, Juanhua, additional, Wang, Chenyun, additional, Qiao, Jingyuan, additional, Shi, Guangchao, additional, Shang, Jingzhi, additional, Cheng, Qi, additional, Pang, Shuping, additional, Wang, Kai, additional, Rong, Zi‐Qiang, additional, and Huang, Wei, additional

Published
2024
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30. Surface reconstruction via In doping towards high-efficiency CZTSSe solar cells

Author

Cui, Changcheng, primary, Fu, Junjie, additional, Kou, Dongxing, additional, Li, Yimeng, additional, Wei, Hao, additional, Wu, Zucheng, additional, Zhou, Wenhui, additional, Zhou, Zhengji, additional, Yuan, Shengjie, additional, Qi, Yafang, additional, Pang, Shuping, additional, Shao, Zhipeng, additional, Wu, Sixin, additional, and Cui, Guanglei, additional

Published
2023
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31. VOC of Inverted Perovskite Solar Cells Based on N‐Doped PCBM Exceeds 1.2 V: Interface Energy Alignment and Synergistic Passivation

Author

Sun, Xiuhong, primary, Li, Yonghai, additional, Liu, Dachang, additional, Liu, Ruichen, additional, Zhang, Bingqian, additional, Tian, Qingyong, additional, Fan, Bin, additional, Wang, Xianzhao, additional, Li, Zhipeng, additional, Shao, Zhipeng, additional, Wang, Xiao, additional, Cui, Guanglei, additional, and Pang, Shuping, additional

Published
2023
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32. Oxygen Vacancy Mediation in SnO2Electron Transport Layers Enables Efficient, Stable, and Scalable Perovskite Solar Cells

Author

Zhao, Qiangqiang, Zhang, Bingqian, Hui, Wei, Su, Zhenhuang, Wang, Han, Zhang, Qi, Gao, Kun, Zhang, Xiaoxu, Li, Bo-han, Gao, Xingyu, Wang, Xiao, De Wolf, Stefaan, Wang, Kai, and Pang, Shuping

Abstract

Previous findings have suggested a close association between oxygen vacancies in SnO2and charge carrier recombination as well as perovskite decomposition at the perovskite/SnO2interface. Underlying the fundamental mechanism holds great significance in achieving a more favorable balance between the efficiency and stability. In this study, we prepared three SnO2samples with different oxygen vacancy concentrations and observed that a low oxygen vacancy concentration is conducive to long-term device stability. Iodide ions were observed to easily diffuse into regions with high oxygen vacancies, thereby speeding up the deprotonation of FAI, as made evident by the detection of the decomposition product formamide. In contrast, a high oxygen vacancy concentration in SnO2could prevent hole injection, leading to a decrease in interfacial recombination losses. To suppress this decomposition reaction and address the trade-off, we designed a bilayer SnO2structure to ensure highly efficient carrier transport still while maintaining a chemically inert surface. As a result, an enhanced efficiency of 25.06% (certified at 24.55% with an active area of 0.09 cm2under fast scan) was achieved, and the extended operational stability maintained 90% of their original efficiency (24.52%) after continuous operation for nearly 2000 h. Additionally, perovskite submodules with an active area of 14 cm2were successfully assembled with a PCE of up to 22.96% (20.09% with an aperture area).

Published
2024
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38. VOC of Inverted Perovskite Solar Cells Based on N‐Doped PCBM Exceeds 1.2 V: Interface Energy Alignment and Synergistic Passivation.

Author

Sun, Xiuhong, Li, Yonghai, Liu, Dachang, Liu, Ruichen, Zhang, Bingqian, Tian, Qingyong, Fan, Bin, Wang, Xianzhao, Li, Zhipeng, Shao, Zhipeng, Wang, Xiao, Cui, Guanglei, and Pang, Shuping

Subjects
SOLAR cells, PASSIVATION, PHOTOVOLTAIC power systems, DOPING agents (Chemistry), PEROVSKITE, ELECTRON mobility, ELECTRON donors
Abstract

Phenyl‐C61‐butyric acid methyl ester (PCBM) remains the most commonly used electron transport layer in inverted perovskite solar cells (IPSCs). However, its insufficient electrical properties and passivation ability limit the device's performance. In this study, it is demonstrated that introducing an appropriate amount of n‐type polymer N2200 into the PCBM can simultaneously enhance the electrical properties of PCBM and passivate the defects distributed on perovskite surface. This modification of PCBM leads to improved band alignment and enhanced electron mobility. Simultaneously, N2200 polymer contains electron donors such as O, S involved in passivating uncoordinated Pb2+ defects. The PCBM@N2200‐based IPSCs exhibit an enhanced open‐circuit voltage (VOC) of 1.20 V with the minimum 0.36 V voltage loss and reach the champion power conversion efficiency (PCE) of 24.53% (certified PCE is 24.05%) with narrow distribution. Impressively, the corresponding module achieves an efficiency of 20.30% (11.19 cm2). Moreover, the PCBM@N2200‐based IPSCs maintain 96% of their initial efficiency after operating at the maximum power point for 500 h, thanks to the interfacial passivation, improved uniformity, and increased hydrophobicity resulting from N2200 doping. [ABSTRACT FROM AUTHOR]

Published
2023
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41. PbI6 Octahedra Stabilization Strategy Based on π‐π Stacking Small Molecule Toward Highly Efficient and Stable Perovskite Solar Cells

Author

Wang, Xianzhao, primary, Liu, Dachang, additional, Liu, Ruichen, additional, Du, Xiaofan, additional, Zhang, Bingqian, additional, Sun, Xiuhong, additional, Chen, Chen, additional, Li, Zhipeng, additional, Zhao, Qiangqiang, additional, Shao, Zhipeng, additional, Wang, Xiao, additional, Cui, Guanglei, additional, and Pang, Shuping, additional

Published
2023
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43. Boric acid improves the stability of perovskite solar cell precursor solution

Author

Zhipeng Li, Qiangqiang Zhao, Bingqian Zhang, Cui Guanglei, Li Wang, Dachang Liu, Fan Yingping, Zhipeng Shao, Pang Shuping, and Xiao Wang

Subjects
Boric acid, chemistry.chemical_compound, Materials science, chemistry, Chemical engineering, General Chemical Engineering, Materials Chemistry, Perovskite solar cell, General Chemistry, Biochemistry
Published
2021
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45. Thermally Crosslinked Hole Conductor Enables Stable Inverted Perovskite Solar Cells with 23.9% Efficiency

Author

Zhang, Cuiping, primary, Liao, Qiaogan, additional, Chen, Jinyu, additional, Li, Bolin, additional, Xu, Chaoying, additional, Wei, Kun, additional, Du, Guozheng, additional, Wang, Yang, additional, Liu, Dachang, additional, Deng, Jidong, additional, Luo, Zhide, additional, Pang, Shuping, additional, Yang, Ye, additional, Li, Jingrui, additional, Yang, Li, additional, Guo, Xugang, additional, and Zhang, Jinbao, additional

Published
2023
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46. Improved performance and stability of perovskite solar cells by iodine-immobilizing with small and flexible bis(amide) molecule

Author

Wang, Xianzhao, primary, Zhao, Qiangqiang, additional, Li, Zhipeng, additional, Liu, Dachang, additional, Chen, Chen, additional, Zhang, Bingqian, additional, Sun, Xiuhong, additional, Du, Xiaofan, additional, Hao, Lianzheng, additional, Gao, Caiyun, additional, Li, Yimeng, additional, Mao, Sui, additional, Shao, Zhipeng, additional, Wang, Xiao, additional, Cui, Guanglei, additional, and Pang, Shuping, additional

Published
2023
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48. A Multifunctional Polymer as an Interfacial Layer for Efficient and Stable Perovskite Solar Cells

Author

Zhang, Bingqian, primary, Chen, Chen, additional, Wang, Xianzhao, additional, Du, Xiaofan, additional, Liu, Dachang, additional, Sun, Xiuhong, additional, Li, Zhipeng, additional, Hao, Lianzheng, additional, Gao, Caiyun, additional, Li, Yimeng, additional, Shao, Zhipeng, additional, Wang, Xiao, additional, Cui, Guanglei, additional, and Pang, Shuping, additional

Published
2022
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49. UAV aided fruit picking strategy for emergency harvesting

Author

Pang, Shuping, Yang, Jun, Lu, Guilu, Wang, Xuan, Wang, Yunpeng, Geng, Junhao, and Bi, Huibo

Abstract

The COVID-19 pandemic has introduced a new type of emergency situation which features the long lasting nature and rigid restrictions in human activities. In agriculture, the pandemic has severely restricted the fruit harvesting activities due to their labour-intensive characteristic. Hence, in this paper, we proposes an unmanned aerial vehicles aided approach to speed up the fruit picking process in both normal and emergency situations (such as the current COVID-19 pandemic or extreme weather conditions). The fruit picking process is modelled as an assignment problem and the time cost in both travelling and picking actions is taken into consideration. The simulation results show that the proposed algorithm remarkably improves the efficiency of the fruit picking process.

Published
2024
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