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Your search keyword '"Yang, Yingguo"' showing total 504 results
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504 results on '"Yang, Yingguo"'

1. A Catalyst‐Like System Enables Efficient Perovskite Solar Cells

Author

Yang, Yuqian, Li, Guodong, Zhao, Lichen, Tan, Pengju, Li, Yu, Li, Shunde, Tan, Lina, Deng, Chunyan, Wang, Shibo, Zhao, Zhenzhu, Yuan, Chengjian, Ding, Honghe, Chen, Liang, Zhu, Junfa, Guan, Yong, Hou, Cheng‐Hung, Tang, Pengyi, Li, Quiyang, Liu, Hong, Yang, Yingguo, Abate, Antonio, Shyue, Jing‐Jong, Wu, Jihuai, Russell, Thomas P, and Hu, Qin

Subjects
Macromolecular and Materials Chemistry, Chemical Sciences, Physical Chemistry, Engineering, Materials Engineering, catalyst‐like system, formation kinetics, homogeneity, multiscale structure, perovskite solar cells, Physical Sciences, Nanoscience & Nanotechnology, Chemical sciences, Physical sciences
Abstract

High-quality perovskite films are essential for achieving high performance of optoelectronic devices; However, solution-processed perovskite films are known to suffer from compositional and structural inhomogeneity due to lack of systematic control over the kinetics during the formation. Here, the microscopic homogeneity of perovskite films is successfully enhanced by modulating the conversion reaction kinetics using a catalyst-like system generated by a foaming agent. The chemical and structural evolution during this catalytic conversion is revealed by a multimodal synchrotron toolkit with spatial resolutions spanning many length scales. Combining these insights with computational investigations, a cyclic conversion pathway model is developed that yields exceptional perovskite homogeneity due to enhanced conversion, having a power conversion efficiency of 24.51% for photovoltaic devices. This work establishes a systematic link between processing of precursor and homogeneity of the perovskite films.

Published
2024

21. Synthesis-on-substrate of quantum dot solids

Author

Jiang, Yuanzhi, Sun, Changjiu, Xu, Jian, Li, Saisai, Cui, Minghuan, Fu, Xinliang, Liu, Yuan, Liu, Yaqi, Wan, Haoyue, Wei, Keyu, Zhou, Tong, Zhang, Wei, Yang, Yingguo, Yang, Jien, Qin, Chaochao, Gao, Shuyan, Pan, Jun, Liu, Yufang, Hoogland, Sjoerd, Sargent, Edward H., Chen, Jun, and Yuan, Mingjian

Published
2022
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22. Covalent bonding strategy to enable non-volatile organic cation perovskite for highly stable and efficient solar cells

Author

Liu, Kai, Rafique, Saqib, Musolino, Stefania F., Cai, Zenghua, Liu, Fengcai, Li, Xiaoguo, Yuan, Yongbo, Bao, Qinye, Yang, Yingguo, Chu, Jiao, Peng, Xinxin, Nie, Cengao, Yuan, Wei, Zhang, Sidi, Wang, Jiao, Pan, Yiyi, Zhang, Haijuan, Cai, Xia, Shi, Zejiao, Li, Chongyuan, Wang, Haoliang, Deng, Liangliang, Hu, Tianxiang, Wang, Yaxin, Wang, Yanyan, Chen, Shiyou, Shi, Lei, Ayala, Paola, Wulff, Jeremy E., Yu, Anran, and Zhan, Yiqiang

Published
2023
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28. Side‐chain symmetry‐breaking strategy on porphyrin donors enables high‐efficiency binary all‐small‐molecule organic solar cells

Author

Zou, Wentao, primary, Zhang, Xu, additional, Shen, Haojiang, additional, Zhang, Wenqing, additional, Jiang, Xinyue, additional, Ni, Liaohui, additional, Shen, Can, additional, Geng, Longlong, additional, Hao, Xiaotao, additional, Yang, Yingguo, additional, Wang, Xunchang, additional, Yang, Renqiang, additional, Sun, Yanna, additional, Kan, Yuanyuan, additional, and Gao, Ke, additional

Published
2024
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29. Interface Dipole Management of D‐A‐Type Molecules for Efficient Perovskite Solar Cells

Author

Wang, Hongze, primary, Wang, Junbo, additional, He, Qingyun, additional, Chang, Jingxi, additional, Chen, Shaoyu, additional, Zhong, Chongyu, additional, Wu, Mengyang, additional, Zhao, Xiangru, additional, Chen, Haoyu, additional, Tian, Qiushuang, additional, Li, Mubai, additional, Lai, Jingya, additional, Yang, Yingguo, additional, Li, Renzhi, additional, Wu, Bo, additional, Huang, Wei, additional, Qin, Tianshi, additional, and Wang, Fangfang, additional

Published
2024
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30. Dualistic insulator states in 1T-TaS2 crystals

Author

Wang, Yihao, primary, Li, Zhihao, additional, Luo, Xuan, additional, Gao, Jingjing, additional, Han, Yuyan, additional, Jiang, Jialiang, additional, Tang, Jin, additional, Ju, Huanxin, additional, Li, Tongrui, additional, Lv, Run, additional, Cui, Shengtao, additional, Yang, Yingguo, additional, Sun, Yuping, additional, Zhu, Junfa, additional, Gao, Xingyu, additional, Lu, Wenjian, additional, Sun, Zhe, additional, Xu, Hai, additional, Xiong, Yimin, additional, and Cao, Liang, additional

Published
2024
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31. Atomic-resolved hierarchical structure of elastic π-conjugated molecular crystal for flexible organic photonics

Author

Wei, Chuanxin, Bai, Lubing, An, Xiang, Xu, Man, Liu, Wei, Zhang, Weizhe, Singh, Manjeet, Shen, Kang, Han, Yamin, Sun, Lili, Lin, Jinyi, Zhao, Qiang, Zhang, Yujian, Yang, Yingguo, Yu, Mengna, Li, Yinxiang, Sun, Ning, Han, Yufeng, Xie, Linghai, Ou, Changjin, Sun, Bo, Ding, Xuehua, Xu, Chunxiang, An, Zhongfu, Chen, Runfeng, Ling, Haifeng, Li, Wen, Wang, Jianpu, and Huang, Wei

Published
2022
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33. Stabilization of highly efficient perovskite solar cells with a tailored supramolecular interface.

Author

Zhao, Chenxu, Zhou, Zhiwen, Almalki, Masaud, Hope, Michael A., Zhao, Jiashang, Gallet, Thibaut, Krishna, Anurag, Mishra, Aditya, Eickemeyer, Felix T., Xu, Jia, Yang, Yingguo, Zakeeruddin, Shaik M., Redinger, Alex, Savenije, Tom J., Emsley, Lyndon, Yao, Jianxi, Zhang, Hong, and Grätzel, Michael

Subjects
SOLAR cells, NUCLEAR magnetic resonance spectroscopy, PEROVSKITE, AMMONIUM salts, BUSINESS hours
Abstract

The presence of defects at the interface between the perovskite film and the carrier transport layer poses significant challenges to the performance and stability of perovskite solar cells (PSCs). Addressing this issue, we introduce a dual host-guest (DHG) complexation strategy to modulate both the bulk and interfacial properties of FAPbI3-rich PSCs. Through NMR spectroscopy, a synergistic effect of the dual treatment is observed. Additionally, electro-optical characterizations demonstrate that the DHG strategy not only passivates defects but also enhances carrier extraction and transport. Remarkably, employing the DHG strategy yields PSCs with power conversion efficiencies (PCE) of 25.89% (certified at 25.53%). Furthermore, these DHG-modified PSCs exhibit enhanced operational stability, retaining over 96.6% of their initial PCE of 25.55% after 1050 hours of continuous operation under one-sun illumination, which was the highest initial value in the recently reported articles. This work establishes a promising pathway for stabilizing high-efficiency perovskite photovoltaics through supramolecular engineering, marking a significant advancement in the field. The defects at the perovskite/carrier transport layer interface pose significant challenges to the performance of perovskite solar cells. Here, the authors introduce a dual host-guest complexation strategy with Cs-crown-ether and ammonium salt, achieving a high PCE of 25.9% with superior stability. [ABSTRACT FROM AUTHOR]

Published
2024
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34. Highly Oriented FAPbI3 via 2D Ruddlesden Popper Perovskite Template Growth.

Author

Wang, Yaxin, Shi, Zejiao, Wang, Yanyan, Zhang, Juan, Zhang, Xin, Li, Xiaoguo, Wang, Haoliang, Li, Chongyuan, Wang, Jiao, Zhang, Hao, Yang, Yingguo, Zhang, Jia, Yu, Anran, and Zhan, Yiqiang

Subjects
PHASE transitions, SOLAR cell efficiency, PEROVSKITE, PHASE modulation, SOLAR cells
Abstract

2D perovskites are demonstrated as the growth template for the modulation of phase transition and crystallization of formamidinium lead triiodide (FAPbI3). However, it is challenging to obtain highly oriented α‐FAPbI3 and regulate crystallization at the bottom of the FAPbI3 film. Here, a 2D (BA)2PbI4 layer with preferred orientation is introduced to perform as the bottom template for the quasi‐epitaxial growth of FAPbI3, which triggers the α‐FAPbI3 perovskite formation. Owing to the assembly of [PbI6]4− octahedral on the 2D template, the highly (100) oriented FAPbI3 perovskites from the bottom to the top are attained. At the optimum concentration, 2D perovskites gradually vanish due to the extrusion of BA+ cation from the template, which guarantees the charge transport at the bottom. Consequently, the strategy effectively promotes film quality and suppresses non‐radiative recombination. The efficiency of perovskite solar cells (PSCs) is promoted from 23.06% to 24.78%. [ABSTRACT FROM AUTHOR]

Published
2024
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37. Two Completely Non‐Fused Ring Acceptors Working in an Alloy‐Like Model for Efficient and Stable Organic Solar Cells

Author

Han, Chenyang, primary, Gao, Huanhuan, additional, Kan, Yuanyuan, additional, Zhang, Xu, additional, Jiang, Xinyue, additional, Shen, Can, additional, Ni, Liaohui, additional, Lv, Zekun, additional, Zhang, Zhan, additional, Wang, Lei, additional, Zapien, Juan Antonio, additional, Yang, Yingguo, additional, Sun, Yanna, additional, and Gao, Ke, additional

Published
2024
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39. High-Performance Blue Perovskite Light-Emitting Diodes Enabled by Synergistic Effect of Additives

Author

Zhang, Fujun, primary, Yang, Yingguo, additional, Gao, Yanbo, additional, Wang, Dingdi, additional, Dong, Weinan, additional, Lu, Po, additional, Wang, Xue, additional, Lu, Min, additional, Wu, Yanjie, additional, Chen, Ping, additional, Hu, Junhua, additional, Yang, Xuyong, additional, Zhou, Donglei, additional, Liu, Dali, additional, Xu, Lin, additional, Dong, Biao, additional, Wu, Zhennan, additional, Zhang, Yu, additional, Song, Hongwei, additional, and Bai, Xue, additional

Published
2024
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40. Polydentate Ligand Reinforced Chelating to Stabilize Buried Interface toward High‐Performance Perovskite Solar Cells

Author

Liu, Baibai, primary, Zhou, Qian, additional, Li, Yong, additional, Chen, Yu, additional, He, Dongmei, additional, Ma, Danqing, additional, Han, Xiao, additional, Li, Ru, additional, Yang, Ke, additional, Yang, Yingguo, additional, Lu, Shirong, additional, Ren, Xiaodong, additional, Zhang, Zhengfu, additional, Ding, Liming, additional, Feng, Jing, additional, Yi, Jianhong, additional, and Chen, Jiangzhao, additional

Published
2024
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41. Pseudo-halide anion engineering for [alpha]-FAPbI.sub.3 perovskite solar cells

Author

Jeong, Jaeki, Kim, Minjin, Seo, Jongdeuk, Lu, Haizhou, Ahlawat, Paramvir, Mishra, Aditya, and Yang, Yingguo

Subjects
Perovskite -- Usage, Anions -- Usage, Amidines -- Chemical properties, Solar batteries -- Materials -- Energy use, Solar cells -- Materials -- Energy use, Halides -- Atomic properties, Environmental issues, Science and technology, Zoology and wildlife conservation
Abstract

Metal halide perovskites of the general formula ABX.sub.3--where A is a monovalent cation such as caesium, methylammonium or formamidinium; B is divalent lead, tin or germanium; and X is a halide anion--have shown great potential as light harvesters for thin-film photovoltaics.sup.1-5. Among a large number of compositions investigated, the cubic [alpha]-phase of formamidinium lead triiodide (FAPbI.sub.3) has emerged as the most promising semiconductor for highly efficient and stable perovskite solar cells.sup.6-9, and maximizing the performance of this material in such devices is of vital importance for the perovskite research community. Here we introduce an anion engineering concept that uses the pseudo-halide anion formate (HCOO.sup.-) to suppress anion-vacancy defects that are present at grain boundaries and at the surface of the perovskite films and to augment the crystallinity of the films. The resulting solar cell devices attain a power conversion efficiency of 25.6 per cent (certified 25.2 per cent), have long-term operational stability (450 hours) and show intense electroluminescence with external quantum efficiencies of more than 10 per cent. Our findings provide a direct route to eliminate the most abundant and deleterious lattice defects present in metal halide perovskites, providing a facile access to solution-processable films with improved optoelectronic performance. Incorporation of the pseudo-halide anion formate during the fabrication of [alpha]-FAPbI.sub.3 perovskite films eliminates deleterious iodide vacancies, yielding solar cell devices with a certified power conversion efficiency of 25.21 per cent and long-term operational stability., Author(s): Jaeki Jeong [sup.1] [sup.2] [sup.3] , Minjin Kim [sup.4] , Jongdeuk Seo [sup.1] , Haizhou Lu [sup.2] [sup.3] , Paramvir Ahlawat [sup.5] , Aditya Mishra [sup.6] , Yingguo Yang [...]

Published
2021
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43. Efficient All-Inorganic Perovskite Light-Emitting Diodes Enabled by Simultaneous Growth Regulation and Defect Passivation

Author

Xu, Chunyang, Zhang, Kun, Gong, Yingqun, Yang, Yingguo, Wang, Lin, Zhang, Chengxi, and Yang, Xuyong

Abstract

Metal-halide perovskites(MHPs) have attracted widespread attention as the next-generation luminescent materials due to their excellent emission characteristics, such as narrowband emission and tunable color. Compared with hybrid perovskites, all-inorganic perovskites have better thermal and chemical stability and can therefore provide the basis for high-performance light-emitting diodes (LEDs) with reasonable operating stability. However, due to the large grain size and relatively poor surface quality of inorganic perovskites, the radiation recombination efficiency is inefficient, leading to a reduced efficiency of LED devices. Here, we employed the additive [2-(9H-carbazol-9-yl)ethyl]phosphonic acid (2PACz) for a straightforward in situ reaction with three-dimensional (3-D) inorganic perovskite. 2PACz forms a covalent bond with under-coordinated lead atoms on the perovskite surface, effectively passivating surface defects and enhancing radiative recombination efficiency. Simultaneously, crystal growth was controlled to obtain high-quality inorganic perovskite thin films with a smooth surface and small grain size. This approach not only reduces trap density in the perovskite but also maintains excellent charge transport characteristics of 3-D perovskite. Consequently, we fabricated a perovskite light-emitting diode (PeLED) with a maximum brightness of 13 192 cd m−2, an external quantum efficiency (EQE) of up to 20.87%, and a half-lifetime of 479 h (at 100 cd m−2).

Published
2024
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46. Self‐Polymerized Spiro‐Type Interfacial Molecule toward Efficient and Stable Perovskite Solar Cells.

Author

Tian, Qiushuang, Chang, Jingxi, Wang, Junbo, He, Qingyun, Chen, Shaoyu, Yang, Pinghui, Wang, Hongze, Lai, Jingya, Wu, Mengyang, Zhao, Xiangru, Zhong, Chongyu, Li, Renzhi, Huang, Wei, Wang, Fangfang, Yang, Yingguo, and Qin, Tianshi

Subjects
SOLAR cells, VINYL polymers, OPEN-circuit voltage, HOLE mobility, INTERMOLECULAR interactions, PEROVSKITE
Abstract

In the pursuit of highly efficient perovskite solar cells, spiro‐OMeTAD has demonstrated recorded power conversion efficiencies (PCEs), however, the stability issue remains one of the bottlenecks constraining its commercial development. In this study, we successfully synthesize a novel self‐polymerized spiro‐type interfacial molecule, termed v‐spiro. The linearly arranged molecule exhibits stronger intermolecular interactions and higher intrinsic hole mobility compared to spiro‐OMeTAD. Importantly, the vinyl groups in v‐spiro enable in situ polymerization, forming a polymeric protective layer on the perovskite film surface, which proves highly effective in suppressing moisture degradation and ion migration. Utilizing these advantages, poly‐v‐spiro‐based device achieves an outstanding efficiency of 24.54 %, with an enhanced open‐circuit voltage of 1.173 V and a fill factor of 81.11 %, owing to the reduced defect density, energy level alignment and efficient interfacial hole extraction. Furthermore, the operational stability of unencapsulated devices is significantly enhanced, maintaining initial efficiencies above 90 % even after 2000 hours under approximately 60 % humidity or 1250 hours under continuous AM 1.5G sunlight exposure. This work presents a comprehensive approach to achieving both high efficiency and long‐term stability in PSCs through innovative interfacial design. [ABSTRACT FROM AUTHOR]

Published
2024
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48. Dualistic insulator states in 1T-TaS2 crystals.

Author

Wang, Yihao, Li, Zhihao, Luo, Xuan, Gao, Jingjing, Han, Yuyan, Jiang, Jialiang, Tang, Jin, Ju, Huanxin, Li, Tongrui, Lv, Run, Cui, Shengtao, Yang, Yingguo, Sun, Yuping, Zhu, Junfa, Gao, Xingyu, Lu, Wenjian, Sun, Zhe, Xu, Hai, Xiong, Yimin, and Cao, Liang

Subjects
CRYSTALS, DEGREES of freedom, BAND gaps, CRYSTAL structure, MONOMOLECULAR films, ELECTRIC current rectifiers
Abstract

While the monolayer sheet is well-established as a Mott-insulator with a finite energy gap, the insulating nature of bulk 1T-TaS2 crystals remains ambiguous due to their varying dimensionalities and alterable interlayer coupling. In this study, we present a unique approach to unlock the intertwined two-dimensional Mott-insulator and three-dimensional band-insulator states in bulk 1T-TaS2 crystals by structuring a laddering stack along the out-of-plane direction. Through modulating the interlayer coupling, the insulating nature can be switched between band-insulator and Mott-insulator mechanisms. Our findings demonstrate the duality of insulating nature in 1T-TaS2 crystals. By manipulating the translational degree of freedom in layered crystals, our discovery presents a promising strategy for exploring fascinating physics, independent of their dimensionality, thereby offering a "three-dimensional" control for the era of slidetronics. While monolayer of 1T-TaS2 is considered to be a Mott insulator, the nature of the bulk insulating state is debated. Here the authors introduce a ladder-type structures with fractional misalignment of adjacent layers, showing that it becomes a Mott insulator due to decoupling between the layers. [ABSTRACT FROM AUTHOR]

Published
2024
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