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
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
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
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
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
Materials Science, Multidisciplinary
Wen Ting Sun, Zengshan Xing, Aleksandr Sergeev, Yanling He, Alan Man Ching Ng, Kam Sing Wong, Lidija Molcanov, Jasminka Popovic, Aleksandra B. B. Djurisic
Summary: Investigated the stability of a tin bromide perovskite and found that the optical properties were influenced by humidity rather than the Sn2+/Sn4+ ratio. Increase in luminescence was attributed to the hydrated 1D phase, while degradation occurred after 40 hours of exposure to humidity. Additives extended the lifetime of the samples, which was attributed to changes in phase composition rather than suppression of Sn2+ oxidation.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Nanoscience & Nanotechnology
Xinshun Qin, Yanling He, Chun Ki Tao, Aleksandr Sergeev, Kam Sing Wong, Zhilin Ren, Qiong Liang, Tik Lun Leung, Gang Li, Jasminka Popovic, Alan Man Ching Ng, Aleksandra B. Djurisic
Summary: We investigated the influence of two passivating molecules containing a P=O group on the performance of quasi-2D Dion-Jacobson halide perovskite light-emitting diodes. Our findings showed that both passivating molecules led to increased efficiency compared to control devices, with TPPO decreasing the device lifetime while TSPO1 increased it. The differences in energy-level alignment, electron injection, film morphology, crystallinity, and ion migration during operation accounted for the varying effects of the two molecules.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Nanoscience & Nanotechnology
Jingyang Lin, Yantao Wang, Abdul Khaleed, Ali Asgher Syed, Yanling He, Christopher C. S. Chan, Yin Li, Kuan Liu, Gang Li, Kam Sing Wong, Jasminka Popovic, Jing Fan, Alan Man Ching Ng, Aleksandra B. Djurisic
Summary: Phosphonic acid based self-assembled monolayers (SAMs) are commonly used for interface modifications in inverted perovskite solar cells to enhance hole extraction and power conversion efficiency. Ethanolamine surface modification combined with [2-(9H-carbazol-9-yl)ethyl]-phosphonic acid (2PACz) significantly improves device stability and extends the T-80 lifetime under simulated solar illumination in ambient by more than 15 times, compared to devices with 2PACz modification only.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Inorganic & Nuclear
Ana Lozancic, Sanja Renka, Dario Barisic, Sanja Burazer, Kresimir Molcanov, Damir Pajic, Marijana Juric
Summary: Two heterometallic coordination polymers with two-dimensional oxalate-bridged anionic layers and hydrogen-bonded templating cations were obtained and showed remarkable humidity-sensing properties, high proton conductivity, and long-range antiferromagnetic order. The better proton transport in one of the polymers can be attributed to the higher hydrophilicity of its cations. The layered structure facilitated water uptake, enhancing the proton conductivity at high relative humidity.
INORGANIC CHEMISTRY
(2023)
Article
Pharmacology & Pharmacy
Si Nga Wong, Kam-Hung Low, Yi Lam Poon, Xinyue Zhang, Ho Wan Chan, Shing Fung Chow
Summary: This study successfully synthesized a cocrystal of remdesivir (RDV) with salicylic acid (SA) through liquid-assisted grinding and thermal annealing. The molecular structure of RDV-SA was resolved through powder X-ray analysis. RDV-SA was further developed as inhaled dry powders for potential COVID-19 therapy, displaying improved release in simulated lung fluid compared to raw RDV.
INTERNATIONAL JOURNAL OF PHARMACEUTICS
(2023)
Article
Chemistry, Inorganic & Nuclear
Chen Wu, Kam-Hung Low, Vonika Ka-Man Au
Summary: A class of alkaline earth metal-based metal-organic frameworks (MOFs) named NDCMOF(Ca) and NDCMOF(Sr) were synthesized using 2,6-naphthalenedicarboxylic acid (NDC) as the linker. These MOFs were able to remove copper(II) ions (Cu2+) from aqueous systems and exhibited comparable adsorption capacities to other related MOFs and porous materials. Additionally, they displayed blue luminescence in the solid state at room temperature upon UV light excitation, which could be quenched after the adsorption of Cu2+ ions, making them versatile adsorbents and sensors for Cu2+ in water.
JOURNAL OF SOLID STATE CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Xiaoyong Mo, Yulin Deng, Samuel Kin-Man Lai, Xutao Gao, Hung-Ling Yu, Kam-Hung Low, Zhengxiao Guo, Heng-Liang Wu, Ho Yu Au-Yeung, Edmund C. M. Tse
Summary: Efficient O2 reduction reaction (ORR) for selective H2O generation can be achieved by introducing the concept of mechanical interlocking to Cu complexes. These interlocked catenane ligands can control O2 binding mode, promote electron transfer, and enhance the selectivity and activity of ORR.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Applied
Dongyang Li, Yulan Huang, Zhiwei Ren, Abbas Amini, Aleksandra B. Djurisic, Chun Cheng, Gang Li
Summary: In recent years, inverted perovskite solar cells (IPSCs) have gained significant attention for their low-temperature and cost-effective fabrication processes, hysteresis-free properties, excellent stability, and wide application. The efficiency gap between IPSCs and regular structures has narrowed down to less than 1%. Recent improvements in the efficiency of IPSCs, including interface engineering and novel film production techniques, are reviewed, along with tandem and integrated applications of IPSCs. Prospects for further development of IPSCs, such as the development of new materials, methods, and device structures, are discussed to meet the requirements of commercialization.
JOURNAL OF ENERGY CHEMISTRY
(2023)
Article
Materials Science, Multidisciplinary
Shien-Ping Feng, Yuanhang Cheng, Hin-Lap Yip, Yufei Zhong, Patrick W. K. Fong, Gang Li, Annie Ng, Cong Chen, Luigi Angelo Castriotta, Fabio Matteocci, Luigi Vesce, Danila Saranin, Aldo Di Carlo, Puqun Wang, Jian Wei Ho, Yi Hou, Fen Lin, Armin G. Aberle, Zhaoning Song, Yanfa Yan, Xu Chen, Yang (Michael) Yang, Ali Asgher Syed, Ishaq Ahmad, Tiklun Leung, Yantao Wang, JingYang Lin, Alan Man Ching Ng, Yin Li, Firouzeh Ebadi, Wolfgang Tress, Giles Richardson, Chuangye Ge, Hanlin Hu, Masoud Karimipour, Fanny Baumann, Kenedy Tabah, Carlos Pereyra, Sonia R. Raga, Haibing Xie, Monica Lira-Cantu, Mark Khenkin, Iris Visoly-Fisher, Eugene A. Katz, Yana Vaynzof, Rosario Vidal, Guicheng Yu, Haoran Lin, Shuchen Weng, Shifeng Wang, Aleksandra B. Djurisic
Summary: Perovskite solar cells (PSCs) are highly promising in terms of power conversion efficiency, but commercialization still faces unresolved problems and obstacles. This article provides a concise summary of outstanding issues, challenges, and progress made in addressing them, offering expert viewpoints across various topics related to PSC commercialization. It aims to serve as a valuable resource for researchers in the field and facilitate discussions to overcome the outstanding challenges in this fast-developing area.
JOURNAL OF PHYSICS-MATERIALS
(2023)
Article
Polymer Science
Natasa Sijakovic Vujicic, Janja Makarevic, Jasminka Popovic, Zoran Stefanic, Mladen Zinic
Summary: The gelation capacities of (N-Alkyloxalamido)-amino acid amides 9-12 towards lipophilic solvents and commercial fuels have been investigated. Among them, gelator 10 exhibits the highest gelation capacity towards petrol and diesel with very low minimum gelation concentration values. The self-assembly motif of 10 has been determined and confirmed by various experimental techniques. The gelation properties and phase-selective gelation ability of 10 have potential applications in oil spill recovery, wastewater treatment, and fuel storage and transport technologies.
Article
Materials Science, Multidisciplinary
Juraj Ovcar, Luca Grisanti, Bruno Mladineo, Aleksandra B. Djurisic, Jasminka Popovic, Ivor Loncaric
Summary: Two-dimensional lead halide perovskites hold great promise for optoelectronics, and their properties can be tuned by the number of lead halide layers and the choice of an organic spacer. Understanding the crystal structure is crucial for the rational design of materials. However, the preparation of two-dimensional lead halide perovskites in the form of films complicates the experimental determination of structure. In order to enable theoretical studies and high-throughput virtual screening, we have developed an algorithm for predicting the crystal structure of lead halide perovskites, which provides fast access to a structure suitable for further first-principles studies.
Article
Chemistry, Inorganic & Nuclear
Takeshi Nakagawa, Yang Ding, Kejun Bu, Xujie Lu, Haozhe Liu, Anna Moliterni, Jasminka Popovicc, Marian Mihalik, Zvonko Jaglicic, Matus Mihalik, Martina Vrankic
Summary: This study reveals the flexible physical and photophysical behaviors of a hybrid organic-inorganic ferroelectric material under high pressure. The pressure-induced structural distortion leads to band gap modulation and piezochromic effect. In addition, pressure enhances the material's photoluminescence.
INORGANIC CHEMISTRY
(2023)
Article
Materials Science, Multidisciplinary
Wen Ting Sun, Yanling He, Muhammad Umair Ali, Qiye Liu, Hongbo Mo, Sijia Wang, Alan Man Ching Ng, Aleksandra B. Djurisic
Summary: This study investigates the performance improvement of sky-blue perovskite light-emitting diodes through optimization of perovskite composition and device architecture. By adjusting the perovskite composition and inserting a specific layer at the hole transport layer-perovskite interface, significant enhancement in device efficiency is achieved.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Chemistry, Physical
Damir Aidarkhanov, Zhuldyz Yelzhanova, Zhiwei Ren, Gaukhar Nigmetova, Shu Ping Lau, Mannix P. Balanay, Hanlin Hu, Charles Surya, Aleksandra B. Djurisic, Annie Ng
Summary: Interfacial engineering using black phosphorus nanoflakes improves the power conversion efficiency and stability of perovskite solar cells. The nanoflakes optimize critical parameters, such as enhancing perovskite crystallization and reducing defect density, resulting in improved device performance.
SURFACES AND INTERFACES
(2023)