Article
Chemistry, Inorganic & Nuclear
Yongsheng Zhu, Jun Zhao, Xueguo Li, Xiumei Xu, Jinshu Huang, Xiaoxu Ji, Gang Yang, Gencai Pan
Summary: Efficient inert shell-modified NaYF4:Yb/Tm@NaYF4 upconversion nanoparticles (UCNPs) and CsPbI3 perovskite quantum dots (PQDs) were successfully synthesized with the assistance of (3-aminopropyl)-triethoxysilane (APTES) for a SiO2 matrix. The composites showed dual-wavelength excitation characteristics and dual-mode anticounterfeiting application, highlighting the potential of perovskite-based multifunctional materials.
INORGANIC CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Dong Zhang, Takuya Okamoto, Vasudevanpillai Biju
Summary: This study demonstrates the controlled growth of high-quality FA/MAPbBr(3) single microcrystals with desired properties through thermodynamic and kinetic methods using N-cyclohexyl-2-pyrrolidone (CHP) concentration. The size, density, and photoluminescence (PL) properties of the crystals were controlled by varying the CHP concentration and temperature. The single crystals obtained at 190℃ and 20% CHP concentration exhibited the highest PL intensity and the longest PL lifetimes.
Article
Nanoscience & Nanotechnology
Guanghui Yu, Ke-Jian Jiang, Wei-Min Gu, Xinning Jiao, Tangyue Xue, Yiqiang Zhang, Yanlin Song
Summary: A cation-exchange approach is used to fabricate high-quality all-inorganic CsPbI3 perovskite solar cells with a power-conversion efficiency of 18.2%.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Chuan-Xin Cui, Jin-Wu Jiang
Summary: In this study, the mechanical properties of different phases of CsPbI3 under finite deformation were investigated using reactive molecular dynamics simulations. Anisotropy in Young's modulus and Poisson's ratio was observed in the linear elastic region. The orthorhombic phase showed lower hardness and higher flexibility compared to the tetragonal and cubic phases, leading to higher susceptibility to stress. The average atomic charge decreased with increasing strain and concentrated at cracks during fracture progression. Additionally, negative Poisson's ratio was found in the xz-direction during finite deformation of the tetragonal and orthorhombic phases, which could be explained by the Pb-I-Pb angle perpendicular to the xy-plane. These findings provide valuable insights into the mechanical behavior and fracture characteristics of CsPbI3 perovskite, with implications for designing perovskite-based devices for various applications.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Multidisciplinary
Mengyun Chen, Tiankai Zhang, Anna Elsukova, Zhangjun Hu, Rui Zhang, Yonghong Wang, Xianjie Liu, Xiaoke Liu, Feng Gao
Summary: Stable CsPbI3 nanoplatelets with lower surface-area-to-volume ratio and improved spectral stability are synthesized by accelerating the crystallization process using kinetic control.
Article
Chemistry, Physical
Zhangben Dai, Junsheng Chen, Bin Yang
Summary: A series of Yb2+-alloyed CsPbI3 perovskite nanocrystals were synthesized, showing pure-red emission with enhanced air and thermal stability, and ultrafast hot-carrier cooling processes, which suggest great potential for high-performance pure-red light-emitting diodes.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Chemistry, Multidisciplinary
Shuo Wang, Ming-Hua Li, Yanyan Zhang, Yan Jiang, Li Xu, Fuyi Wang, Jin-Song Hu
Summary: A surface n-type band bending strategy was developed to mitigate energy losses in inverted CsPbI3 perovskite solar cells. By post-deposition of propylamine hydrochloride, a p to n-type transition was induced, accelerating electron separation and extraction while passivating surface defects. As a result, the inverted CsPbI3 devices achieved record-high power conversion efficiencies of 20.17% (19.67% on average) under 1-sun equivalent illumination and 38.93% under indoor LED light.
ENERGY & ENVIRONMENTAL SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Wanpeng Yang, Haixuan Yu, Letian Dai, Zhiguo Zhang, Anjie Gu, Huaxia Ban, Qiang Sun, Shuangyin Chen, Yan Shen, Mingkui Wang
Summary: This study proposes an effective method using phosphorus pentachloride as an additive to fabricate high-quality and stable CsPbI3 films. The method has great potential in photovoltaic applications.
Article
Chemistry, Multidisciplinary
Tiantian Liu, Jie Zhang, Minchao Qin, Xin Wu, Fengzhu Li, Xinhui Lu, Zonglong Zhu, Alex K-Y Jen
Summary: In order to improve the performance of all-inorganic perovskite solar cells, an ultra-thin 2D perovskite is used to terminate CsPbI3 grain boundaries, enhancing charge-carrier extraction and transport while effectively suppressing nonradiative recombination.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Arup Ghorai, Somnath Mahato, Sudarshan Singh, Shaona Bose, Baidyanath Roy, Unyong Jeong, Samit Kumar Ray
Summary: In this study, degraded alpha-CsPbI3, which is inactive under ambient conditions, is successfully revived using thiol-containing ligands. The effect of different thiols is investigated using optical spectroscopy. The structural reconstruction of degraded alpha-CsPbI3 nanocrystals to cubic crystals in the presence of thiol-containing ligands is demonstrated using transmission electron microscopy and X-ray diffraction analysis. The use of 1-dodecanethiol (DSH) effectively revives degraded CsPbI3, resulting in high resistance to moisture and oxygen, which has not been reported before. DSH facilitates surface defect passivation and etching of degraded Cs4PbI6 phase, leading to enhanced photoluminescence and environmental stability.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Review
Materials Science, Multidisciplinary
Xue Tan, Shubin Wang, Qixian Zhang, Huicong Liu, Weiping Li, Liqun Zhu, Haining Chen
Summary: This review discusses the strategies and progress in stabilizing the CsPbI3 perovskite structure and improving the stability of CsPbI3 perovskite solar cells. It covers topics such as ionic incorporation, regulating surface energy, incorporating low-dimensional perovskites, and surface termination. The challenges and opportunities of all-inorganic CsPbI3 perovskite are also briefly mentioned.
Article
Chemistry, Physical
Sumanta Paul, Anunay Samanta
Summary: By adding NH4I as a precursor, stable and highly luminescent CsPbI3 nanocrystals were successfully synthesized in this study, with significantly suppressed PL blinking. These CsPbI3 nanocrystals can be used as promising materials for single-photon emitters and optoelectronic and solar photovoltaic applications.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Chemistry, Physical
Jibin Zhang, Chunyang Yin, Fei Yang, Yuan Yao, Fanglong Yuan, Hongting Chen, Rongwen Wang, Sai Bai, Guoli Tu, Lintao Hou
Summary: This study introduces stable and highly luminescent black-phase CsPbI3 nanocrystals passivated by novel ligands of sodium dodecyl sulfate (SDS), which exhibit significantly reduced surface defects, enhanced stability, and superior photoluminescence efficiency. Red perovskite light-emitting diodes based on the SDS-CsPbI3 nanocrystals achieve an external quantum efficiency of 8.4%, showing a 4-fold improvement compared to devices using oleic acid-modified CsPbI3 nanocrystals.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Chemistry, Multidisciplinary
Xingtao Wang, Yong Wang, Yuetian Chen, Xiaomin Liu, Yixin Zhao
Summary: This study demonstrates defect compensation in CsPbI3 perovskite through crystal secondary growth induced by a solid-state reaction, resulting in highly efficient inorganic photovoltaics. The secondary growth process involving a bromine salt can heal defects, improve charge dynamics, enhance phase stability, and deliver a solar cell efficiency of 20.04% with excellent operational stability.
ADVANCED MATERIALS
(2021)
Article
Multidisciplinary Sciences
Wei Shen, Jianbin Zhang, Ruimin Dong, Yanfeng Chen, Liu Yang, Shuo Chen, Zhan Su, Yujun Dai, Kun Cao, Lihui Liu, Shufen Chen, Wei Huang
Summary: By doping Ca2+ in alpha-CsPbI3 nanocrystals, the stability and optoelectronic properties of the material have been significantly improved, demonstrating the potential of Ca2+ doping strategy in high-quality CsPbI3 NC LEDs.
Article
Chemistry, Multidisciplinary
Han Wang, Derrick J. Butler, Daniel B. Straus, Nuri Oh, Fengkai Wu, Jiacen Guo, Kun Xue, Jennifer D. Lee, Christopher B. Murray, Cherie R. Kagan
Article
Chemistry, Physical
Daniel B. Straus, Natasha Iotov, Michael R. Gau, Qinghua Zhao, Patrick J. Carroll, Cherie R. Kagan
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2019)
Article
Chemistry, Multidisciplinary
Daniel B. Straus, Sebastian Hurtado Parra, Natasha Iotov, Qinghua Zhao, Michael R. Gau, Patrick J. Carroll, James M. Kikkawa, Cherie R. Kagan
Article
Chemistry, Multidisciplinary
Daniel B. Straus, Shu Guo, A. M. Milinda Abeykoon, Robert J. Cava
ADVANCED MATERIALS
(2020)
Article
Chemistry, Multidisciplinary
Daniel B. Straus, Robert J. Cava
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2020)
Article
Chemistry, Multidisciplinary
Qinghua Zhao, Guillaume Gouget, Jiacen Guo, Shengsong Yang, Tianshuo Zhao, Daniel B. Straus, Chengyang Qian, Nuri Oh, Han Wang, Christopher B. Murray, Cherie R. Kagan
Summary: This study successfully transformed epitaxially connected PbSe nanocrystal thin films into high photoconductance zinc-blende CdSe NC solids through solid-state cation exchange reactions, and further improved the structure and photoconductivity using atomic-layer deposited Al2O3. The fabricated field-effect transistors showed high electron mobilities and on-off ratios after doping, demonstrating the potential for optoelectronic devices with high performance.
Article
Chemistry, Inorganic & Nuclear
Daniel B. Straus, Hillary E. Mitchell Warden, Robert J. Cava
Summary: This study presents a unique organic-inorganic hybrid material with square pyramidal coordination of lead ions, expanding the potential realm of lead halide materials. The presence of Pb2+ lone pair as a ligand-like behavior in lead halide compounds offers new possibilities for extended solids with nonoctahedral coordination environments.
INORGANIC CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Daniel B. Straus, Robert J. Cava
Summary: The study presents the spontaneous chiral self-assembly of C-70 and a mixture of C-60 and C-70 with SnI4, resulting in macroscopic single crystals with a specific formula. The results show that nonspherical particles and polydispersity do not hinder the growth of chiral crystals from high-symmetry achiral precursors, providing a method to assemble achiral particles into chiral materials without external templates or forces.
Article
Materials Science, Multidisciplinary
Lun Jin, Danrui Ni, Xin Gui, Daniel B. Straus, Qiang Zhang, Robert J. Cava
Summary: We report two solid solutions based on the magnetic ion doping of the double perovskite oxide Sr2GaSbO6: Sr2Ga1-xCrxSbO6 (0.1 <= x <= 0.4) and Sr2Ga1-xFexSbO6 (0.1 <= x <= 0.4). The Cr- and Fe-doped phases exhibit dominant antiferromagnetic coupling among the dopant magnetic moments and decreasing band gaps with increasing substitution level.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
Article
Nanoscience & Nanotechnology
Daniel B. Straus, Robert J. Cava
Summary: By using solid-state synthesis, the band gap of halide perovskite CsPbBr3 can be continuously widened through homovalent substitution, allowing its optical properties to be tailored for absorptive and emissive applications.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Inorganic & Nuclear
Teresa Lee, Daniel B. Straus, Kasey P. Devlin, Xin Gui, Pria Louka, Weiwei Xie, Robert J. Cava
Summary: This study synthesizes and characterizes the magnetic and thermodynamic properties of quasi one-dimensional organic-inorganic hybrid ANiCl3 compounds and reports the crystal structure of (CH3)2NH2NiCl3. The magnetic coupling within chains can be predicted by the value of the Ni-Cl-Ni angle.
INORGANIC CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Sebastian Hurtado Parra, Daniel B. Straus, Bryan T. Fichera, Natasha Iotov, Cherie R. Kagan, James M. Kikkawa
Summary: In this study, evidence for the formation and relaxation of large exciton polarons in 2D organic-inorganic hybrid perovskites was found. It was demonstrated that the structural differences among materials strongly influenced the exciton polaron relaxation process.
Article
Chemistry, Physical
Daniel B. Straus, Tomasz Klimczuk, Xianghan Xu, Robert J. Cava
Summary: Bulk CsEuBr3 and CsEuCl3 are magnetic semiconductors that order antiferromagnetically at Neel temperatures of 2.0 K and 1.0 K, respectively. Our observation of antiferromagnetic ordering in CsEuBr3 and CsEuCl3 expands the possible applications of halide perovskites to include spintronic devices, where both ferromagnetic and antiferromagnetic devices can be fabricated from a single material. Density-functional theory calculations support the use of CsEuCl3 as a switchable magnetic material.
CHEMISTRY OF MATERIALS
(2022)
Article
Chemistry, Physical
Teresa Lee, Daniel B. Straus, Xianghan Xu, Weiwei Xie, Robert J. Cava
Summary: Magnetically active atomic distances can directly or indirectly impact the magnetic ordering in a given system. We synthesized three novel quasi-one-dimensional organic-inorganic hybrid cobalt chloride chain compounds and characterized their magnetic and thermodynamic properties. These compounds exhibit anti-ferromagnetic intrachain coupling and the strength of correlations is comparable across the three materials. The interchain Co-Co distance, which is determined by the size of the organic cation, is directly related to the temperature of long-range magnetic ordering.
CHEMISTRY OF MATERIALS
(2023)
