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| 1 | Highly ordered lead-free double perovskite halides by design显示文摘Lead-free double perovskite halides are emerging optoelectronic materials that are alternatives to leadbased perovskite halides.Recently,single-crystalline double perovskite halides were synthesized,and their intriguing functional properties were demonstrated.Despite such pioneering works,lead-free double perovskite halides with better crystallinity are still in demand for applications to novel optoelectronic devices.Here,we realized highly crystalline Cs2AgBiBr6 single crystals with a well-defined atomic ordering on the microscopic scale.We avoided the formation of Ag vacancies and the subsequent secondary Cs3Bi2Br9 by manipulating the initial chemical environments in hydrothermal synthesis.The suppression of Ag vacancies allows us to reduce the trap density in the as-grown crystals and to enhance the carrier mobility further.Our design strategy is applicable for fabricating other lead-free halide materials with high crystallinity. | Chang Won Ahn Jae Hun Jo Jong Chan Kim Hamid Ullah Sangkyun Ryu Younghun Hwang Jin San Choi Jongmin Lee Sanghan Lee Hyoungjeen Jeen Young-Han Shin Hu Young Jeong Ill Won Kim Tae Heon Kim | 2020 | Journal of Materiomics2020，6，4： | 2 |
| 2 | Optimized 4‐V Spinel Cathode Material with High Energy Density for Li‐Ion Cells Operating at 60 °C显示文摘 | Sanghan Lee Minseul Jeong Jaephil Cho | 2013 | Adv Energy Mater2013，，12： | 1 |
| 3 | Recent progress on nanostructured 4 V cathode materials for Li-ion batteries for mobile electronics显示文摘 | Xiaodong Xu Sanghan Lee Sookyung Jeong | 2013 | Materials Today2013，16，12： | 1 |
| 4 | Causes of sudden death related to sexual activity: results of a medicolegal postmortem study from 2001 to 2005显示文摘 | LEE SANGHAN CHAE JONGMIN CHO YONGKEUN | 2006 | Journal of Korean medical science2006，21，6： | 1 |
| 5 | Carbon-coated single-crystal LiMn2O4 nanoparticle clusters as cathode material for high-energy and high-power Lithium-ion batteries显示文摘 | Lee Sanghan Cho Yonghyun Hyun-Kon | 2012 | An- gew Chem Int Ed2012，51，： | 1 |
| 6 | Carbon-coa- ted single-crystal LiMnzO4 nanoparticle clusters as cath- ode material for high-energy and high-power lithium-ion batteries显示文摘 | Sanghan L Yonghyun C Hyun Kon S | 2012 | Angewandte Chemie International Edition2012，51，35： | 1 |
| 7 | High Performance LiMn204 Cathode Materials Grown with Epitaxial Layered Nanostructure for Li-Ion Batteries显示文摘 | Min-Joon Lee Sanghan Lee Pilgun Oh | 2014 | NanoLett2014，14，2： | 1 |
| 8 | High performance LiMn204 cathode materials grown with epitaxial layered nanostrueture for Li-ion batteries显示文摘 | Min-Joon Lee Sanghan Lee Pilgun Oh | 2014 | Nano Lett2014，14，2： | 1 |
| 9 | Enhancing BiVO_(4)photoanode performance by insertion of an epitaxial BiFeO_(3)ferroelectric layer显示文摘BiVO_(4)(BVO)is a promising material as the photoanode for use in photoelectrochemical applications.However,the high charge recombination and slow charge transfer of the BVO have been obstacles to achieving satisfactory photoelectrochemical performance.To address this,various modifications have been attempted,including the use of ferroelectric materials.Ferroelectric materials can form a permanent polarization within the layer,enhancing the separation and transport of photo-excited electron-hole pairs.In this study,we propose a novel approach by depositing an epitaxial BiFeO_(3)(BFO)thin film underneath the BVO thin film(BVO/BFO)to harness the ferroelectric property of BFO.The self-polarization of the inserted BFO thin film simultaneously functions as a buffer layer to enhance charge transport and a hole-blocking layer to reduce charge recombination.As a result,the BVO/BFO photoanodes showed more than 3.5 times higher photocurrent density(0.65 mA cm^(-2))at 1.23 V_(RHE)under the illumination compared to the bare BVO photoanodes(0.18 m A cm^(-2)),which is consistent with the increase of the applied bias photon-to-current conversion efficiencies(ABPE)and the result of electrochemical impedance spectroscopy(EIS)analysis.These results can be attributed to the self-polarization exhibited by the inserted BFO thin film,which promoted the charge separation and transfer efficiency of the BVO photoanodes. | Haejin Jang Yejoon Kim Hojoong Choi Jiwoong Yang Yoonsung Jung Sungkyun Choi Donghyeon Lee Ho Won Jang Sanghan Lee | 2024 | Journal of Energy Chemistry2024，89，2： | 0 |
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