Article
Chemistry, Multidisciplinary
Jinsong Qi, Shixun Wang, Arsenii Portniagin, Stephen V. Kershaw, Andrey L. Rogach
Summary: A facile room temperature wet milling method was developed to synthesize lead-free Dion-Jacobson (DJ) phase ODASnBr(4) perovskite microcrystals, with the assistance of primary alcohols. The emission spectra of the microcrystals could be adjusted by introducing different primary alcohols, while maintaining a high photoluminescence quantum yield. This synthetic strategy provides a viable pathway towards strongly emitting and stable lead-free DJ perovskite microcrystals.
Article
Chemistry, Multidisciplinary
Shixun Wang, Jasminka Popovic, Sanja Burazer, Arsenii Portniagin, Fangzhou Liu, Kam-Hung Low, Zonghui Duan, Yanxiu Li, Yuan Xiong, Yuanming Zhu, Stephen V. Kershaw, Aleksandra B. Djurisic, Andrey L. Rogach
Summary: Stable and highly emitting lead-free DJ perovskite materials have been developed using a room-temperature ligand assisted re-precipitation method, with molecular doping to fine-tune the spectral position of emission while maintaining high photoluminescence quantum yields.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Multidisciplinary Sciences
Fei Zhang, So Yeon Park, Canglang Yao, Haipeng Lu, Sean P. Dunfield, Chuanxiao Xiao, Sona Ulicna, Xiaoming Zhao, Linze Du Hill, Xihan Chen, Xiaoming Wang, Laura E. Mundt, Kevin H. Stone, Laura T. Schelhas, Glenn Teeter, Sean Parkin, Erin L. Ratcliff, Yueh-Lin Loo, Joseph J. Berry, Matthew C. Beard, Yanfa Yan, Bryon W. Larson, Kai Zhu
Summary: The performance of 3D perovskite solar cells can be improved by treating the surface with 2D layered perovskites that have efficient charge transport. Adjusting the arrangement of organic molecules enhances hole transport and power conversion efficiency. The use of a stable 2D surface layer also improves the performance and stability of 3D perovskite solar cells.
Article
Nanoscience & Nanotechnology
Yukta, Nishi Parikh, Rohit D. Chavan, Pankaj Yadav, Mohammad Khaja Nazeeruddin, Soumitra Satapathi
Summary: Heterostructures involving 2D/3D perovskites have potential applications in the field of solar cells, combining high efficiency and stability. This study successfully constructed 2D/3D perovskite heterojunction solar cells by introducing modifications to the 3D perovskite active layer and adding a 2D perovskite capping layer, achieving remarkably high photovoltaic performance.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Review
Nanoscience & Nanotechnology
Min Liu, Thierry Pauporte
Summary: Due to their chemical stability and anisotropic characteristics, DJ-layered halide perovskites have attracted increasing attention for solar devices. Their structural and photoelectronic features allow for elimination or reduction of the van der Waals gap. However, defects can occur during the solution process and fast crystal growth of DJ perovskite thin layers. The application of additives can improve crystallization, trap passivation, interface structure, and energetic tuning. This study discusses recent developments in additive engineering for DJ multilayer halide perovskite film production and provides an overview of research developments in additive engineering in the production of DJ-layered halide perovskite solar cells.
NANO-MICRO LETTERS
(2023)
Article
Nanoscience & Nanotechnology
Yukta, Rohit D. Chavan, Daniel Prochowicz, Pankaj Yadav, Mohammad Mahdi Tavakoli, Soumitra Satapathi
Summary: Two-dimensional metal halide perovskites show promise as photovoltaic materials, but their solar cells still have lower efficiency than their three-dimensional counterparts. Introducing organic cations and additives can improve crystallinity and charge transport in perovskites, enhancing solar cell efficiency.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Multidisciplinary
C-H. Angus Li, Pui Kei Ko, Christopher C. S. Chan, Aleksandr Sergeev, Dezhang Chen, Neha Tewari, Kam Sing Wong, Jonathan E. Halpert
Summary: Producing efficient blue and deep blue perovskite LEDs (PeLEDs) is still a challenge in optoelectronics due to problems with color, luminance, and stability. This study proposes a solution by mixing DJ phase precursors into RP phase perovskites, which suppresses unwanted phases and allows for blue shifting. By optimizing the concentration and layers, a stable deep blue PeLED with an external quantum efficiency of 1.5% at 469 nm is achieved.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Cheng Gong, Xihan Chen, Jie Zeng, Huaxin Wang, Haiyun Li, Qingkai Qian, Cong Zhang, Qixin Zhuang, Xuemeng Yu, Shaokuan Gong, Hua Yang, Baomin Xu, Jiangzhao Chen, Zhigang Zang
Summary: By fabricating functional-group-induced single QW Dion-Jacobson (DJ) 2D perovskites, a high-quality 2D/3D perovskite heterostructure is constructed, which improves the stability and carrier transport of the 3D structure. The resulting devices achieve high conversion efficiency and maintain high efficiency under prolonged use and harsh conditions.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Inorganic & Nuclear
Mi-Hee Jung
Summary: The incorporation of 3-(aminomethyl)pyridinium (3API2) cation into FA(Pb0.5Sn0.5)I3 perovskite leads to the development of 2D Dion-Jacobson-phase perovskites with low band gaps and high-quality films, which improve the performance of perovskite solar cells.
DALTON TRANSACTIONS
(2023)
Article
Chemistry, Multidisciplinary
Zhiyuan Xu, Di Lu, Xiyue Dong, Mingqian Chen, Qiang Fu, Yongsheng Liu
Summary: The newly developed TTDMA spacer enables 2D DJ perovskite solar cells to achieve high efficiency and long-term stability, with significant advantages in various performance indicators confirmed by experiments.
ADVANCED MATERIALS
(2021)
Article
Energy & Fuels
Jieyi Chen, Boxin Wang, Gaosheng Huang, Qian Cheng, Yanxun Li, Xing Li, Shilin Li, Kang Li, Lina Zhu, Zihao Zhai, Yuan Zhang, Huiqiong Zhou
Summary: Quasi-2D perovskite solar cells (PSCs) offer stability and tunable optoelectronic properties, making them a promising alternative to 3D PSCs. However, the lack of understanding in improving the film quality of 2D perovskites has hindered their power conversion efficiency. This study presents a thermally induced crystallization strategy to process high-quality 2D perovskite films, leading to improved photovoltaic performance through suppressed nonradiative recombination, more efficient charge generation, and restricted interfacial charge accumulation.
Article
Chemistry, Physical
Wenhui Li, Xiaoyu Gu, Chengwei Shan, Xue Lai, Xiao Wei Sun, Aung Ko Ko Kyaw
Summary: The study introduces a localized Dion-Jacobson 2D-3D heterostructure to enhance the efficiency and stability of mesoscopic perovskite solar cells. The structure, with DJ 2D plates partially covering the surface of 3D perovskite, reduces charge transfer impedance and enhances moisture stability, resulting in improved performance of the cells.
Article
Chemistry, Multidisciplinary
Haiyang He, Yifeng Xing, Zhongjie Cui, Shuaitao Qin, Zhuoqi Wen, Dan Yang, Haijiao Xie, Shiliang Mei, Wanlu Zhang, Ruiqian Guo
Summary: This study creates a new type of metal halide perovskite colloidal quantum wells (CMQWs) based on Dion-Jacobson (D-J) structure perovskite by introducing an asymmetric diammonium cation. By regulating phase distribution, pure deep-blue emission at 435 nm is achieved. The D-J structural CMQWs exhibit inherent superior stability, which opens a new direction for fabricating stable perovskite optoelectronics.
Review
Chemistry, Physical
Wei Guo, Zhi Yang, Jialin Dang, Minqiang Wang
Summary: 2D organic-inorganic halide perovskites have gained attention in optoelectronics field for their higher moisture stability and lower ion migration compared to 3D structures. The DJ phase perovskites, with a tighter structure connection due to hydrogen bonding, exhibit higher crystal stability and more favorable charge transfer.
Article
Chemistry, Multidisciplinary
Guangwei Lv, Ling Li, Di Lu, Zhiyuan Xu, Yixin Dong, Qiaohui Li, Zhitao Chang, Wan-Jian Yin, Yongsheng Liu
Summary: A multifluorinated aromatic spacer, 4F-PhDMA, has been developed for 2D DJ perovskites, showing high dissociation energy and improved stability. The optimized 2D DJ device with this spacer achieves a champion efficiency of 16.62%, higher than control devices, highlighting the importance of noncovalent interactions in achieving high efficiencies and stabilities in 2D DJ perovskite solar cells.
Article
Chemistry, Multidisciplinary
Shixun Wang, Jasminka Popovic, Sanja Burazer, Arsenii Portniagin, Fangzhou Liu, Kam-Hung Low, Zonghui Duan, Yanxiu Li, Yuan Xiong, Yuanming Zhu, Stephen V. Kershaw, Aleksandra B. Djurisic, Andrey L. Rogach
Summary: Stable and highly emitting lead-free DJ perovskite materials have been developed using a room-temperature ligand assisted re-precipitation method, with molecular doping to fine-tune the spectral position of emission while maintaining high photoluminescence quantum yields.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Chemistry, Physical
Zonghui Duan, Shixun Wang, Jinsong Qi, Arsenii S. Portniagin, Aaron Doering, Stephen Kershaw, Andrey L. Rogach
Summary: A facile approach was developed to fabricate highly luminescent and stable quasi-two-dimensional/three-dimensional perovskite films, which exhibited strong luminescence and stability in water for several tens of minutes without encapsulation. The high photoluminescence quantum yield of 91% was attributed to the efficient energy funneling between two-dimensional and three-dimensional perovskite phases and the passivation effect of the organic additive.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Materials Science, Multidisciplinary
Fangzhou Liu, Xinshun Qin, Bing Han, Christopher C. S. Chan, Chao Ma, Tik Lun Leung, Wei Chen, Yanling He, Ivor Loncaric, Luca Grisanti, Juraj Ovcar, Zeljko Skoko, Yingli Shi, Francis Chi Chung Ling, Md Rashedul Huqe, Juan Antonio Zapien, Shixun Wang, Chun-Jen Su, U-Ser Jeng, Kam Sing Wong, Alan Man Ching Ng, Meng Gu, Jasminka Popovic, Aleksandra B. Djurisic
Summary: The performance of quasi-2D perovskite light emitting diodes (LEDs) is significantly affected by the ratio of mixed small cations cesium and formamidinium (FA), with the best devices achieved at a Cs:FA ratio of 1:1. This ratio leads to improved photoluminescence quantum yield, enhanced crystallization of the perovskite, and a reduction in trap density, resulting in a substantial improvement in light-emitting performance.
ADVANCED OPTICAL MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Jinyang Zhu, Junhua Hu, Qiang Hu, Xiaoyu Zhang, Elena Ushakova, Kaikai Liu, Shixun Wang, Xu Chen, Chongxin Shan, Andrey L. Rogach, Xue Bai
Summary: This study demonstrates the realization of white-light room-temperature long-lived afterglow emission from CD powder, with a synergy between the phosphorescence of the carbon core and the delayed fluorescence associated with surface C(sic)N moieties. By matching the singlet state of the surface groups of CDs with the long-lived triplet state of the carbon core, an efficient energy transfer is achieved.
Article
Chemistry, Physical
Juraj Ovcar, Tik Lun Leung, Luca Grisanti, Zeljko Skoko, Martina Vrankic, Kam-Hung Low, Shixun Wang, Pei-Ying You, Hyeyoung Ahn, Ivor Loncaric, Aleksandra B. Djurisic, Jasminka Popovic
Summary: This study investigates the influence of spacer cations on the structure of two-dimensional perovskites. The results show that the branched tert-butyl ammonium spacer cation can form a stable Ruddlesden-Popper structure when the inorganic pocket is designed appropriately.
CHEMISTRY OF MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Arsenii S. Portniagin, Jiajia Ning, Shixun Wang, Zhuo Li, Aleksander A. Sergeev, Stephen Kershaw, Xiaoyan Zhong, Andrey L. Rogach
Summary: This study successfully achieved the synthesis of core/shell CuInS2/CdS dot-in-rod nanoheterostructures with precise control over morphology and strong emission in the near-infrared range. The use of seeded growth approach allowed for tuning the dimension of the resulting core/shell nanorods, while alloying of the CuInS2 cores with Zn improved the photoluminescence quantum yield.
ADVANCED OPTICAL MATERIALS
(2022)
Article
Chemistry, Physical
Xinliang Li, Shixun Wang, Tairan Wang, Zonghui Duan, Zhaodong Huang, Guojin Liang, Jun Fan, Cheng Yang, Andrey L. Rogach, Chunyi Zhi
Summary: This study proposes the use of bis-ammonium salts as electrodes to address the drawbacks of elemental halogens as promising electrodes for energy storage. The research demonstrates the superior redox kinetics and cycle durability achieved through enhanced chemisorption interaction between the bis-ammonium host and halide ion guests. The results show close-to-theoretical capacities and long service life for aqueous Zn ion batteries.
Article
Chemistry, Multidisciplinary
Kunnathodi Vighnesh, Shixun Wang, Haochen Liu, Andrey L. Rogach
Summary: This article provides a comprehensive hot-injection synthesis protocol for CsPbBr3 nanocrystals, outlining various factors that affect its reproducibility and highlighting the steps for fabricating high-quality green-emitting material.
Article
Chemistry, Physical
Shixun Wang, Zhaodong Huang, Bing Tang, Xinliang Li, Xin Zhao, Ze Chen, Chunyi Zhi, Andrey L. L. Rogach
Summary: In this study, MXDA(2)SnI(6) perovskite microcrystals are proposed as conversion-type cathode materials for aqueous Zn-I-2 batteries, which effectively alleviate the undesired shuttle effect of iodine. The study demonstrates the feasibility of using ionic perovskites to develop high-performance cathodes for metal-I-2 batteries.
ADVANCED ENERGY MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Bing Tang, Shixun Wang, Haochen Liu, Nanli Mou, Arsenii S. Portniagin, Peigang Chen, Ye Wu, Xiaoqing Gao, Dangyuan Lei, Andrey L. Rogach
Summary: Due to their attractive optical and chiroptical properties, chiral metal halide perovskites have gained increasing attention for their potential applications in various fields. Recent studies have reported the presence of either intrinsic or extrinsic chirality in metal halide perovskite nanocrystals, and the interaction between these two types of chirality remains to be explored. This study investigates the inversion and modulation of excitonic optical activity in intrinsically chiral perovskite nanoplatelets, revealing the role of structural chirality and surface chiral ligands in inducing these effects. These findings contribute to a better understanding of the modulation of excitonic optical activity in chiral perovskites and can inform the design and synthesis of novel chiral materials.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Chemistry, Physical
Xin Zhao, Xuerong Zheng, Qi Lu, Ying Li, Fengping Xiao, Bing Tang, Shixun Wang, Denis Y. W. Yu, Andrey L. Rogach
Summary: Decorating single atoms of transition metals on MXenes enhances the electrocatalytic properties of the resulting composites. In this study, cobalt single atoms were anchored onto several commonly used MXene substrates, and the electrocatalytic behavior and mechanisms were systematically studied. The Co@V2CTx composite showed lower overpotentials for oxygen and hydrogen evolution reactions compared to other composites, making it comparable to commercial noble metal electrocatalysts. The enhanced catalytic performance of Co@V2CTx was attributed to optimized electronic structure and accelerated catalytic kinetics. This study sheds light on the origins and guidelines for designing efficient MXene-based electrocatalysts.
Article
Chemistry, Multidisciplinary
Shixun Wang, Ran Shi, Bing Tang, Yuan Xiong, Arsenii Portniagin, Xin Zhao, Stephen Kershaw, Run Long, Andrey L. Rogach
Summary: Co-doping of double perovskites with Bi3+ and Te4+ ions improves their stability and enhances photoluminescence quantum yield. The introduction of Te4+ ions promotes the radiative recombination of self-trapped excitons in Cs2AgInCl6 nanocrystals. Excess use of the TeO2 precursor leads to the generation of residual TeO2, Te2O3Cl2, R2TeO, which improves coordination with surface oleic acid ligands. The co-doped Cs2AgInCl6 nanocrystals with 1% Bi and 8% Te exhibit a high photoluminescence quantum yield of 34% and excellent stability, retaining over 70% of their original emission intensity after storage for more than 1 month.
Article
Nanoscience & Nanotechnology
Shixun Wang, Jinsong Qi, Stephen V. Kershaw, Andrey L. Rogach
Summary: This study improves the crystallinity and photoluminescence quantum yield (PL QY) of Cs2AgInCl6 nanocrystals (NCs) by co-doping Ce3+ and Bi3+. The co-doping strategy eliminates uncoordinated chloride ions and silver vacancies, resulting in adjustable PL emission peaks. Ce3+ doping promotes the localization of self-trapped excitons to prevent PL quenching and enhances the radiative recombination of self-trapped excitons.
ACS NANOSCIENCE AU
(2022)
Article
Nanoscience & Nanotechnology
Zonghui Duan, Guangren Na, Shixun Wang, Jiajia Ning, Bangyu Xing, Fei Huang, Arsenii S. Portniagin, Stephen Kershaw, Lijun Zhang, Andrey L. Rogach
Summary: This study demonstrates a proton transfer process between the organic moiety and the introduced aliphatic alkylamines in 3D methylammonium lead halide perovskite, providing a foundation for fabricating hybrid 3D/2D perovskites and purely 2D Ruddlesden-Popper (RP) perovskite phases. By adjusting the concentration of alkylamine-containing antisolvents, the ratio between the 3D and 2D phases can be controlled. Longer-chain aliphatic alkylamines have the ability to slice 3D perovskite into layered perovskites with efficient green emission. Above a certain concentration threshold, the 3D perovskite can be completely transformed into 2D RP perovskite phases with a specific crystalline orientation.
