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, Multidisciplinary
Mengyu Guan, Yunlong Xie, Yang Zhang, Zixin Gu, Lei Qiu, Zhuojie He, Bingkun Ye, Ady Suwardi, Zhigao Dai, Guogang Li, Guangwei Hu
Summary: Humidity- and moisture-induced degradation has been a longstanding problem in perovskite materials, but a new type of 2D Dion-Jacobson (DJ) perovskite has leveraged moisture to achieve reversible hydrochromic behaviors, improving their long-term stability. By modulating the hydrogen bonds between organic cations and water molecules, the movement of the organic cations is confined to prevent their escape from crystal lattices. The reversible fluorescent transition of these perovskites shows excellent cyclical properties, offering untapped opportunities for reconfigurable optoelectronic applications.
ADVANCED MATERIALS
(2023)
Review
Materials Science, Multidisciplinary
Huiying Fu
Summary: Hybrid halide perovskites have shown promise as semiconducting materials for low-cost thin film photovoltaics, but their inherent instability hinders industrial-scale production. Two-dimensional perovskite structures offer a solution to this issue, allowing for customizable photophysical properties and high-performance devices. Lately, low-dimensional Dion-Jacobson (DJ) phase perovskites have attracted attention for their stability and potential for high power conversion efficiency in optoelectronic applications.
JOURNAL OF MATERIALS CHEMISTRY C
(2021)
Article
Materials Science, Multidisciplinary
Simon Kahmann, Herman Duim, Alexander J. Rommens, Eelco K. Tekelenburg, Shuyan Shao, Maria A. Loi
Summary: The photophysics of 2D perovskites incorporating PDMA as spacer cations have been studied. Low-temperature studies reveal a time-dependent red shift correlated with grain-specific luminescence spectra, suggesting a relation to local defects. This has important implications for understanding the luminescence of 2D perovskites, especially in regards to the peak splitting of the band edge emission.
ADVANCED OPTICAL MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Masaud Almalki, Algirdas Ducinskas, Loi C. Carbone, Lukas Pfeifer, Laura Piveteau, Weifan Luo, Ethan Lim, Patricia A. Gaina, Pascal A. Schouwink, Shaik M. Zakeeruddin, Jovana Milic, Michael Gratzel
Summary: Layered hybrid perovskites with organic spacers between perovskite slabs were synthesized using arene and perfluoroarene moieties. The resulting materials showed the formation of layered perovskite phases and exhibited nanoscale segregation and enhanced stability in humid environments.
Article
Chemistry, Multidisciplinary
Eugenia S. Vasileiadou, Bin Wang, Ioannis Spanopoulos, Ido Hadar, Alexandra Navrotsky, Mercouri G. Kanatzidis
Summary: This study investigates the thermochemical properties of 2D hybrid organic-inorganic halide perovskites, revealing differences in enthalpy of formation between different series. Additionally, analysis of structural parameters and optical properties provides guiding principles for the targeted design and synthesis of 2D perovskites for efficient solar cell fabrication. Further stability studies on film samples indicate lower extrinsic stability of DJ materials in ambient air.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Chemistry, Physical
Ya-Ru Wang, Alessandro Senocrate, Marko Mladenovic, Algirdas Ducinskas, Gee Yeong Kim, Ursula Rothlisberger, Jovana Milic, Davide Moia, Michael Graetzel, Joachim Maier
Summary: This study analyzes the changes in optical absorption of 2D Dion-Jacobson mixed halide perovskite thin films under constant illumination and reveals the reversible photo-induced phase segregation phenomenon. The authors further investigate the temperature-dependent absorption measurements and provide strategies to address the role of light in the thermodynamic properties of these materials.
ADVANCED ENERGY MATERIALS
(2022)
Article
Chemistry, Physical
Algirdas Ducinskas, Gee Yeong Kim, Davide Moia, Alessandro Senocrate, Ya-Ru Wang, Michael A. Hope, Aditya Mishra, Dominik J. Kubicki, Milosz Siczek, Wojciech Bury, Thomas Schneeberger, Lyndon Emsley, Joachim Maier, Jovana Milic, Michael Gratzel
Summary: While layered hybrid halide perovskites are generally believed to be more stable in humid conditions, this study reveals that the structure of Dion-Jacobson-type perovskites can be disrupted under such conditions. The original structure can be restored through annealing, and the hydration can be suppressed by generating a self-protective layer of PbI2.
ACS ENERGY LETTERS
(2021)
Article
Chemistry, Multidisciplinary
Loreta A. Muscarella, Algirdas Ducinskas, Mathias Dankl, Michal Andrzejewski, Nicola Pietro Maria Casati, Ursula Rothlisberger, Joachim Maier, Michael Graetzel, Bruno Ehrler, Jovana Milic
Summary: Layered Dion-Jacobson (DJ) and Ruddlesden-Popper (RP) hybrid perovskites with modular structure are promising for optoelectronic applications. By using mechanical stimuli, their properties can be controlled without changing the composition. This study investigates the structure-property relationships of DJ and RP 2D perovskites under hydrostatic pressure and reveals the changes in lattice and optical properties. Surprisingly, RP and DJ perovskites behave similarly under pressure despite the different spacer molecules. The manipulation of crystal structure affects the optoelectronic properties, and the reversibility of their response expands future application prospects.
ADVANCED MATERIALS
(2022)
Article
Energy & Fuels
Zhongle Zeng, Xiangyu Chen, Yunfan Yue, Sheng Li, Nianyao Chai, Bo Mai, Jiaqi Meng, Yi-Bing Cheng, Xuewen Wang
Summary: Perovskite solar cells have developed rapidly in the past decade, but their poor stability remains a challenge for commercialization. This study focuses on the changes in the absorption spectra of 2D Dion-Jacobson (D-J) perovskite under continuous light illumination. The results show enhanced absorption intensity near the band edge, indicating the production of additional absorbing species. The study also confirms the transformation of D-J perovskite into 3D alpha-FAPbI(3), delta-FAPbI(3), and PbI2 after illumination, providing insights into the degradation mechanism and stability improvement of 2D D-J perovskite materials.
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
Yue Wu, Cui-Mi Shi, Liang-Jin Xu, Ming Yang, Zhong-Ning Chen
Summary: Doping of photoactive metal ions effectively modulates the photophysical properties of perovskite, leading to enhanced emission peak and red-shifted emission. The reversible luminescent vapochromism of the material was investigated, and a potential application as a DMF sensor with stable and producible luminescent changes was demonstrated.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Chemistry, Multidisciplinary
Weixin He, Yali Yang, Chuanzhao Li, Walter P. D. Wong, Fanica Cimpoesu, Ana Maria Toader, Zhenyue Wu, Xiao Wu, Zexin Lin, Qing-hua Xu, Kai Leng, Alessandro Stroppa, Kian Ping Loh
Summary: It is discovered that the polar axis in ferroelectric 2D Dion-Jacobson (DJ) perovskites can be tuned from the out-of-plane (OOP) to the in-plane (IP) direction by substituting the iodide with bromide in the lead halide layer.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Arnab Mandal, Sanuja Kumar Khuntia, Debayan Mondal, Priya Mahadevan, Sayan Bhattacharyya
Summary: The thickness of the organic spacer layer determines the nature of optical transitions in two-dimensional perovskites, whether they are direct or indirect. The spin-orbit interactions affect the electron spin orientations, leading to both direct and indirect transitions. Shorter chains have a larger direct component, resulting in better optoelectronic performance. The lead-free Sn2+ Dion-Jacobson (DJ) perovskite with the shortest spacer shows superior photodetection parameters compared to those with longer spacers.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Materials Science, Multidisciplinary
Hao Hu, Yingmeng Liu, Zuoxiang Xie, Zewen Xiao, Guangda Niu, Jiang Tang
Summary: In this study, centimeter-sized (BDA)PbI4 single crystals were grown using a modified solvent evaporation method, exhibiting a large Stokes-shifted broadband luminescence. The emission, effectively excited by sub-gap photons, was concluded to be caused by defects-induced shallow traps. Density functional theory calculations suggested that in-plane iodine vacancies contribute to the broadband emission by introducing shallow electron traps in the band gap.
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)
Review
Materials Science, Multidisciplinary
Mingxia Jiao, Arsenii S. Portniagin, Xiliang Luo, Lihong Jing, Buxing Han, Andrey L. Rogach
Summary: Semiconductor nanocrystals emitting in the NIR-II window are promising fluorophores for biomedical applications due to their high brightness, adjustable emission wavelength, and stability. This review summarizes recent advances in the synthesis of NIR-II emitting semiconductor nanocrystals and highlights efforts to improve their emission intensity and photostability. It also provides examples of their applications in biomedical imaging, therapy, and surgery.
ADVANCED OPTICAL 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
Chemistry, Physical
Xue Ma, Yang Fu, Arsenii Portniagin, Ning Yang, Danjun Liu, Andrey L. Rogach, Jian-Guo Dai, Dangyuan Lei
Summary: Passive daytime radiative cooling has been widely studied for its potential in combating energy crisis and global warming. This study demonstrates that introducing fluorescent materials into polymeric coatings can enhance the effective solar reflectance and cooling performance. The findings suggest that using phosphors with smaller Stokes shifts and nanoparticle fillers of appropriate sizes can significantly improve the efficiency of radiative cooling.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
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.
