Review
Chemistry, Multidisciplinary
Shaomin Peng, Zhuoying Yang, Ming Sun, Lin Yu, Yanguang Li
Summary: Metal halide perovskites are promising photocatalyst materials for solar fuel production due to their excellent photophysical properties. However, their structural instability poses a challenge for their practical applications. This review discusses the origin of the instability issue, analyzes design rules for robust structures, and presents different material design strategies for stability enhancement. Future research directions for stable and efficient metal halide perovskite photocatalysts are also outlined.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Lidia Romani, Andrea Speltini, Francesco Ambrosio, Edoardo Mosconi, Antonella Profumo, Marcello Marelli, Serena Margadonna, Antonella Milella, Francesco Fracassi, Andrea Listorti, Filippo De Angelis, Lorenzo Malavasi
Summary: This study presents a water-stable metal halide perovskite and demonstrates its application in promoting photocatalysis in aqueous medium, leading to impressive hydrogen evolution rate. The composite with g-C3N4 shows synergistic activity and efficient photocatalytic performance in water, paving the way for a new class of light-driven catalysts.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Materials Science, Multidisciplinary
Jungan Wang, Hongzhuang Ma, Aifei Wang, Zihao Li, Jingjin Dong, You Liu, Song Gao, Suhao Yan, Xianglin Chen, Ya Li, Zichao Wu, Wenxin Xu, Fang Liu, Fangfang Wang, Wei Huang, Tianshi Qin
Summary: We propose an ion-pairing passivating agent that can convert the surface of perovskite solar cells into water-resistant compositions. This agent reduces defect density and improves photovoltage and efficiency. Additionally, it has waterproof features that significantly enhance the stability of the device.
Review
Energy & Fuels
Mu Xiao, Yurou Zhang, Jiakang You, Zhiliang Wang, Jun-Ho Yun, Muxina Konarova, Gang Liu, Lianzhou Wang
Summary: Artificial photosynthesis has the potential to address the exhaustion of fossil fuels and the greenhouse effect by converting solar energy into renewable fuels. Metal halide perovskites, with their superior optoelectronic properties, are promising candidates for efficient solar-to-fuel conversion. However, stability issues have hindered their application in photocatalysis.
JOURNAL OF PHYSICS-ENERGY
(2022)
Article
Chemistry, Multidisciplinary
Tianrui Li, Tao Zhu, Xiyao Zhang, Haorui Tang, Kai Zhang, Xing Zhu, Shaoyuan Li, Wenhui Ma, Jie Yu
Summary: An n-type organic molecule is introduced to enhance the efficiency and stability of perovskite solar cells. The organic molecule forms hydrogen bonds with perovskites, suppressing ion migration and passivating traps in the perovskite layer. The treated perovskite films demonstrate high power conversion efficiency, fill factor, and long-term stability.
Article
Materials Science, Multidisciplinary
Esma Ugur, Erkan Aydin, Michele De Bastiani, George T. Harrison, Bumin K. Yildirim, Sam Teale, Bin Chen, Jiang Liu, Mingcong Wang, Akmaral Seitkhan, Maxime Babics, Anand S. Subbiah, Ahmed Ali Said, Randi Azmi, Atteq Ur Rehman, Thomas G. Allen, Philip Schulz, Edward H. Sargent, Frederic Laquai, Stefaan De Wolf
Summary: By tuninging the dimensionality of 2D perovskites, an improved passivation at the interface and enhanced hole extraction can be achieved, resulting in improved performance and higher photocurrent in perovskite solar cells.
Article
Multidisciplinary Sciences
Mubai Li, Riming Sun, Jingxi Chang, Jingjin Dong, Qiushuang Tian, Hongze Wang, Zihao Li, Pinghui Yang, Haokun Shi, Chao Yang, Zichao Wu, Renzhi Li, Yingguo Yang, Aifei Wang, Shitong Zhang, Fangfang Wang, Wei Huang, Tianshi Qin
Summary: Incorporating mixed ion is a commonly used strategy to stabilize black-phase formamidinium lead iodide perovskite for high-efficiency solar cells. However, these devices commonly suffer from photoinduced phase segregation and humidity instability. The research found that the mixed halide perovskites generally fail to grow into a homogenous and high-crystalline film due to multiple pathways of crystal nucleation. To address this issue, a multifunctional fluorinated additive was designed to restrain the intermediate phases and promote oriented crystallization of the a-phase of perovskite. The polymerized additives in the perovskite film formation formed a hydrogen-bonded network to stabilize the a-phase and imparted a strongly hydrophobic effect to the film against liquid water.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Hanyu Wang, Wenjing Zou, Yukun Ouyang, Xingchong Liu, Haimin Li, Hu Luo, Xiaopeng Zhao
Summary: The addition of oxamic acid potassium salt (OAPS) as a bifunctional additive to perovskite film effectively reduces nonradiative recombination loss, inhibits the formation of iodide Frenkel defects and I- ion migration, leading to enhanced power conversion efficiency and improved device stability.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Qifan Feng, Xiaofeng Huang, Ziheng Tang, Yaolin Hou, Qing Chang, Siqing Nie, Fang Cao, Xiaoying Niu, Jun Yin, Jing Li, Nanfeng Zheng, Binghui Wu
Summary: This study proposes a strategy using PbI6 octahedra-governing with functional synergism of cations and anions to protect unstable PbI6 octahedral frameworks in perovskite-photovoltaic applications. The strategy effectively passivates defects and stabilizes the octahedral structure, leading to high power conversion efficiency and stable continuous output in the modified modules. The anchoring-polymerization protection strategy also shows potential for building stable and practical perovskite photovoltaics.
ENERGY & ENVIRONMENTAL SCIENCE
(2022)
Article
Multidisciplinary Sciences
Zaiwei Wang, Lewei Zeng, Tong Zhu, Hao Chen, Bin Chen, Dominik J. Kubicki, Adam Balvanz, Chongwen Li, Aidan Maxwell, Esma Ugur, Roberto dos Reis, Matthew Cheng, Guang Yang, Biwas Subedi, Deying Luo, Juntao Hu, Junke Wang, Sam Teale, Suhas Mahesh, Sasa Wang, Shuangyan Hu, Eui Dae Jung, Mingyang Wei, So Min Park, Luke Grater, Erkan Aydin, Zhaoning Song, Nikolas J. Podraza, Zheng-Hong Lu, Jinsong Huang, Vinayak P. Dravid, Stefaan De Wolf, Yanfa Yan, Michael Gratzel, Merx G. Kanatzidis, Edward H. Sargent
Summary: Researchers have discovered that lattice distortion in iodide/bromide mixed perovskites can suppress phase segregation, leading to increased ion-migration energy barrier. By using an approximately 2.0-electron-volt rubidium/caesium mixed-cation inorganic perovskite with large lattice distortion, they achieved an efficiency of 24.3% in all-perovskite triple-junction solar cells. This is the first reported certified efficiency for perovskite-based triple-junction solar cells.
Article
Chemistry, Multidisciplinary
Hong Wang, Jian-Xin Wang, Xin Song, Tengyue He, Yang Zhou, Osama Shekhah, Luis Gutierrez-Arzaluz, Mehmet Bayindir, Mohamed Eddaoudi, Osman M. Bakr, Omar F. Mohammed
Summary: Lead-free organic metal halide scintillators with low-dimensional electronic structures have shown great potential in X-ray detection and imaging. The organic copper halide CNCI was successfully used to fabricate X-ray scintillators with high sensitivity and resolution. By using a silicon template, the spatial imaging resolution of the CNCI scintillator was further improved.
ACS CENTRAL SCIENCE
(2023)
Article
Multidisciplinary Sciences
Matteo Degani, Qingzhi An, Miguel Albaladejo-Siguan, Yvonne J. Hofstetter, Changsoon Cho, Fabian Paulus, Giulia Grancini, Yana Vaynzof
Summary: This study presents a dual interfacial modification approach by incorporating large organic cations at both the bottom and top interfaces of the perovskite active layer, leading to simultaneous improvement in both open-circuit voltage and fill factor of the devices, reaching a champion device efficiency of 23.7%. This dual interfacial modification is fully compatible with bulk modification of the perovskite active layer by ionic liquids, resulting in efficient and stable inverted architecture devices.
Review
Chemistry, Multidisciplinary
Xiao Wu, Guoqing Xiong, Ziyao Yue, Ziyao Dong, Yuanhang Cheng
Summary: This review article discusses the defects in wide-bandgap mixed-halide perovskite solar cells and their detrimental effects on material and device performance. Various device engineering strategies for defect passivation are summarized, providing insights for future development of wide-bandgap mixed-halide perovskite solar cells.
MATERIALS CHEMISTRY FRONTIERS
(2023)
Article
Chemistry, Multidisciplinary
Yanrui Zhang, Lixia Ren, Peng Zhai, Jingjing Xin, Jiarong Wu, Qi Zhang, Xin Chen, Kui Zhao, Lu Zhang, Shengzhong (Frank) Liu
Summary: This study investigates the fabrication process of perovskite using water instead of toxic organic solvents. The high surface tension of water is overcome by designing a long-alkyl chain anionic surfactant, potassium oleate (PO), which reduces the surface tension and enables the production of high-quality, pinhole-free perovskite films. The use of PO also improves the formation kinetics of perovskite, resulting in a high power conversion efficiency (PCE) of 24.14% for PSCs.
ENERGY & ENVIRONMENTAL SCIENCE
(2023)
Article
Chemistry, Physical
Chunhua Wang, Haowei Huang, Bo Weng, Davy Verhaeghe, Masoumeh Keshavarz, Handong Jin, Biao Liu, Haipeng Xie, Yang Ding, Yujie Gao, Haifeng Yuan, Julian A. Steele, Johan Hofkens, Maarten B. J. Roeffaers
Summary: By constructing a NiOx/CsPbBr3/TiO2 structure, the photoactivity and stability of CsPbBr3 have been improved, with trace amounts of water found to enhance photoactivity.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Chemistry, Multidisciplinary
Hongki Kim, Ryeong Myeong Kim, Seok Daniel Namgung, Nam Heon Cho, Jung Bae Son, Kijoon Bang, Mansoo Choi, Seong Keun Kim, Ki Tae Nam, Jong Woo Lee, Joon Hak Oh
Summary: Chiral organic ligand-incorporated low-dimensional metal-halide perovskites with chiral plasmonic gold nanoparticles demonstrate remarkable chirality in the near-infrared region and high sensitivity for self-powered NIR detection.
Article
Nanoscience & Nanotechnology
Florian Spreyer, Jungho Mun, Hyeohn Kim, Ryeong Myeong Kim, Ki Tae Nam, Junsuk Rho, Thomas Zentgraf
Summary: The study found that helicoid-III nanoparticles exhibit strong chiroptical responses in both the linear and nonlinear optical regime, and these responses can be quantified through calculations. The results demonstrate that the chirality of the helicoid-III nanoparticles is significantly enhanced in the nonlinear regime.
Article
Materials Science, Multidisciplinary
Jung Sug Hong, Hee Jung Kim, Chang Hwun Sohn, Oh Yeong Gong, Jin Hyuk Choi, Kang Hee Cho, Gill Sang Han, Ki Tae Nam, Hyun Suk Jung
Summary: This study reports a novel synthesis of whitlockite and its application as a high-performing Pb2+ absorbent. The synthesized biomineral exhibits excellent Pb2+ absorption capacity and the absorbed Pb2+ ions can be recycled for the fabrication of perovskite solar cells.
ENERGY & ENVIRONMENTAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Jeong Hyun Han, Yae-Chan Lim, Ryeong Myeong Kim, Jiawei Lv, Nam Heon Cho, Hyeohn Kim, Seok Daniel Namgung, Sang Won Im, Ki Tae Nam
Summary: In this study, a deep learning algorithmic methodology was developed to predict and optimize the chiroptical response of chiral plasmonic sensors for precise determination of concentration and chirality. The neural networks designed and trained based on the understanding of the plasmonic nanodimer successfully predicted the chiroptical properties and inversely designed the plasmonic structure for achieving the desired circular dichroism. This research provides a general platform for the development of ultrasensitive chiral plasmonic sensors.
Article
Chemistry, Multidisciplinary
Onno van der Heijden, Sunghak Park, Jordy J. J. Eggebeen, Marc T. M. Koper
Summary: A wide range of nickel-based catalysts have been studied for the oxygen evolution reaction (OER) in alkaline media, but their activity and Tafel slope values vary greatly. To understand this variation, we investigated Ni80Fe20OOH catalysts with different loadings under various conditions. We found that the Tafel slope value of Ni80Fe20OOH is around 30 mV dec(-1) at low current density (<5 mA cm(-2)), but increases with higher polarization and is affected by rotation rate, loading, hydroxide concentration, and sonication. These Tafel slope values are influenced by non-kinetic effects such as bubbles, potential-dependent changes in ohmic resistance, and (internal) OH- gradients. It is recommended to plot Tafel slopes against current or potential to distinguish kinetic and non-kinetic effects.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Minju Kim, Jiweon Kim, Hyun Jeong Lee, Hyeohn Kim, Ki Tae Nam, Dong Ha Kim
Summary: In this study, a general approach to fabricate chiral metal oxide nanostructures with tunable magneto-chiral effects using block copolymer inverse micelle and R/S-mandelic acid was reported. The study found that diverse chiral metal oxide nanostructures can be prepared by selective incorporation of precursors within micellar cores followed by the oxidation process, exhibiting intense chiroptical properties. This approach can also be used for mass production of chiral nanostructures with tunable architectures and optical activities.
Review
Chemistry, Multidisciplinary
Seungwoo Choi, Won Il Choi, Jun-Seo Lee, Chang Hyun Lee, Mani Balamurugan, Andrew D. Schwarz, Zung Sun Choi, Hyacinthe Randriamahazaka, Ki Tae Nam
Summary: Chloride oxidation is a crucial electrochemical process in chlorine-based chemical production and water treatment. Dimensionally stable anodes (DSAs) comprising RuO2- and IrO2-based mixed-metal oxides have been successfully commercialized. Efforts have been made to develop earth-abundant-metal-based electrocatalysts for sustainable supply of anode materials. This review discusses the history of commercial DSA fabrication, strategies to improve efficiency and stability, electrocatalytic performance, and progress in designing noble-metal-free anode materials.
ADVANCED MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Sang Won Im, Eunjeong Jo, Ryeong Myeong Kim, Jeong Hyun Han, Ki Tae Nam
Summary: The symmetry of gold nanoparticles is closely related to their chiroptical responses. By inducing single or multiple twin planes in seed nanoparticles, the symmetry of gold nanoparticles can be modulated. 32-symmetric chiral gold nanoplates, referred to as 32 helicoids, are successfully synthesized and their growth mechanism is analyzed. This investigation provides an important insight into symmetry control in chiral plasmonic applications.
ADVANCED OPTICAL MATERIALS
(2023)
Editorial Material
Chemistry, Multidisciplinary
Ki Tae Nam, Hyuck Choo, Deoksin Kil, Chul-Hong Kim, Cheolmin Park, Woon-Ryeol Yu
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Sunghak Park, Luhao Liu, Cayan Demirkir, Onno van der Heijden, Detlef Lohse, Dominik Krug, Marc T. M. Koper
Summary: Understanding and manipulating gas bubble evolution during electrochemical water splitting is crucial for optimizing the electrode/electrolyte/gas bubble interface. The study investigates gas bubble dynamics during the hydrogen evolution reaction on a platinum microelectrode by varying the electrolyte composition. The results reveal that the efficiency of microbubble coalescence follows the Hofmeister series of anions in the electrolyte, leading to different types of H-2 gas bubble evolution in different electrolytes.
Article
Materials Science, Multidisciplinary
Hyeohn Kim, Eunji Im, Ryeong Myeong Kim, Nam Heon Cho, Jeong Hyun Han, Hyo-Yong Ahn, Ji-Hyeok Huh, SeokJae Yoo, Seungwoo Lee, Ki Tae Nam
Summary: Large-area metal-insulator-metal (MIM) resonators are demonstrated using non-lithographically assembled chiral gold nanoparticles (helicoids) and subsequent gold layer deposition, proving their boosted chiroptical responses at the visible regime. The strength of capacitive coupling can be precisely tuned by the thickness of the topcoat Au and the dielectric gap. Numerical analysis supports that the optimally tuned capacitive coupling in the chiral MIM structure enhances both electric and magnetic dipolar resonances and brings their spectral positions closer.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Won Il Choi, Seungwoo Choi, Mani Balamurugan, Sunghak Park, Kang Hee Cho, Hongmin Seo, Heonjin Ha, Ki Tae Nam
Summary: This study reports the synthesis of Co3O4 nanoparticle (NP) catalysts by a hydrothermal method. Ru was successfully incorporated into the Co3O4 NPs for improved catalytic performance in chlorine generation. The addition of Ru enhanced structural disorder and changed the electronic state, resulting in additional exposed active sites. The Ru0.09Co2.91O4 NP electrode exhibited outstanding stability, showing its commercial viability for active chlorine generation even at high current densities.
Article
Chemistry, Multidisciplinary
Sunghak Park, Taehwan Jang, Seungwoo Choi, Yoon Ho Lee, Kang Hee Cho, Moo Young Lee, Hongmin Seo, Hyung Kyu Lim, Yujeong Kim, Jinseok Ryu, Sang Won Im, Min Gyu Kim, Ji-Sang Park, Miyoung Kim, Kyoungsuk Jin, Sun Hee Kim, Gyeong-Su Park, Hyungjun Kim, Ki Tae Nam
Summary: In this study, a crystallographically distorted Mn-oxide nanocatalyst with Ir atoms breaking the space group symmetry was reported. The presence of a small amount of Ir was found to facilitate the charge accumulation of Mn atoms.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Jia Bin Yeo, Jun Ho Jang, Young In Jo, Jeong Woo Koo, Ki Tae Nam
Summary: Utilizing CO2-derived formaldehyde derivatives for fuel additive or polymer synthesis can greatly reduce net carbon dioxide emissions. This study proposes a new electrochemical approach to simultaneously generate formaldehyde derivatives at both electrodes by partially oxidizing methanol and directly reducing CO2. The activation and stabilization of formic acid and formaldehyde in methanol solvent enable the generation of formaldehyde derivatives at the cathode alongside the anode.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
