Pub Date : 2021-09-30DOI: 10.31613/ceramist.2021.24.3.07
Ho-yong Lee
Crystallographically engineered Relaxor-PT single crystals, specifically PMN-PT (Generation I) and PIN-PMN-PT/PMN-PZT (Generation II), offer much higher piezoelectric and electromechanical coupling coefficients (d33>1,500 pC/N, k33>0.9), when compared to polycrystalline PZT-5H ceramics (d33>600 pC/N, k33>0.75). Recently Ceracomp Co., Ltd. (www.ceracomp.com) has developed the solid-state single crystal growth (SSCG) technique and successfully fabricated Gen III PMN-PZT single crystals modified with acceptors or donors. The piezoelectric constants (d33) of (001) Gen III PMN-PZT single crystals were measured to be higher than 4,000 pC/N and thus about two times higher than those of PMN-PT/PZN-PT (Gen I) and PIN-PMN-PT/PMN-PZT (Gen II) single crystals. The Gen III PMN-PZT single crystals have been firstly applied to single crystal-epoxy composites, ultrasonic transducers, piezoelectric sensors, and piezoelectric actuators. In this paper we introduce the development of Gen III PMN-PZT single crystals, piezoelectric composites and multilayer single crystal actuators.
{"title":"“Generation III” Piezoelectric Single Crystals Developed by Solid-State Single Crystal Growth Method","authors":"Ho-yong Lee","doi":"10.31613/ceramist.2021.24.3.07","DOIUrl":"https://doi.org/10.31613/ceramist.2021.24.3.07","url":null,"abstract":"Crystallographically engineered Relaxor-PT single crystals, specifically PMN-PT (Generation I) and PIN-PMN-PT/PMN-PZT (Generation II), offer much higher piezoelectric and electromechanical coupling coefficients (d33>1,500 pC/N, k33>0.9), when compared to polycrystalline PZT-5H ceramics (d33>600 pC/N, k33>0.75). Recently Ceracomp Co., Ltd. (www.ceracomp.com) has developed the solid-state single crystal growth (SSCG) technique and successfully fabricated Gen III PMN-PZT single crystals modified with acceptors or donors. The piezoelectric constants (d33) of (001) Gen III PMN-PZT single crystals were measured to be higher than 4,000 pC/N and thus about two times higher than those of PMN-PT/PZN-PT (Gen I) and PIN-PMN-PT/PMN-PZT (Gen II) single crystals. The Gen III PMN-PZT single crystals have been firstly applied to single crystal-epoxy composites, ultrasonic transducers, piezoelectric sensors, and piezoelectric actuators. In this paper we introduce the development of Gen III PMN-PZT single crystals, piezoelectric composites and multilayer single crystal actuators.","PeriodicalId":9738,"journal":{"name":"Ceramist","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90920699","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-09-30DOI: 10.31613/ceramist.2021.24.3.01
H. Yeo
Advance in the growth and characterization of multiferroic thin film promises new device application such as next generation memory, nanoelectronics and energy harvesting. In this review, we provide a brief overview of recent progress in the growth, characterization and understanding of thin-film multiferroics. Driven by the development of thin film growth techniques, the ability to produce high quality multiferroic thin films offers researchers access to new phase and understanding of these materials. We discuss that epitaxial strain and atomic-level engineering of chemistry determine the muliferroic thin film properties. We then discuss the new structures and properties of non-equilibrium phases which is stabilized by strain engineering.
{"title":"Review of Single-Phase Magnetoelectric Multiferroic Thin Film and Process","authors":"H. Yeo","doi":"10.31613/ceramist.2021.24.3.01","DOIUrl":"https://doi.org/10.31613/ceramist.2021.24.3.01","url":null,"abstract":"Advance in the growth and characterization of multiferroic thin film promises new device application such as next generation memory, nanoelectronics and energy harvesting. In this review, we provide a brief overview of recent progress in the growth, characterization and understanding of thin-film multiferroics. Driven by the development of thin film growth techniques, the ability to produce high quality multiferroic thin films offers researchers access to new phase and understanding of these materials. We discuss that epitaxial strain and atomic-level engineering of chemistry determine the muliferroic thin film properties. We then discuss the new structures and properties of non-equilibrium phases which is stabilized by strain engineering.","PeriodicalId":9738,"journal":{"name":"Ceramist","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74034106","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-09-30DOI: 10.31613/ceramist.2021.24.3.08
S. Park, J. W. Lee, K. Cho, Y. Min, C. Ahn
In this manuscript, an interesting phenomenon is reported. It has been reported that the growth of single crystals is observed in donor-doped (K,Na)NbO3 (KNN)-based ceramics. It is very interesting that the growth happens without the addition of a seed. The growth of huge grains (single crystal, approximately 30 mm,) occurs due to the abnormal grain growth (AGG) in KNN-based ceramics. In the AGG compositions, moreover, the seed plates can be synthesized by not topochemical reaction but simple molten salt synthesis (SMSS) which is a simple-and-cheap process. They can be a good candidate for the seeds at reactive templated grain growth (RTGG) or templated grain growth (TGG) process.
{"title":"Giant Grain Growth in (K,Na)NbO3 Ceramics","authors":"S. Park, J. W. Lee, K. Cho, Y. Min, C. Ahn","doi":"10.31613/ceramist.2021.24.3.08","DOIUrl":"https://doi.org/10.31613/ceramist.2021.24.3.08","url":null,"abstract":"In this manuscript, an interesting phenomenon is reported. It has been reported that the growth of single crystals is observed in donor-doped (K,Na)NbO3 (KNN)-based ceramics. It is very interesting that the growth happens without the addition of a seed. The growth of huge grains (single crystal, approximately 30 mm,) occurs due to the abnormal grain growth (AGG) in KNN-based ceramics. In the AGG compositions, moreover, the seed plates can be synthesized by not topochemical reaction but simple molten salt synthesis (SMSS) which is a simple-and-cheap process. They can be a good candidate for the seeds at reactive templated grain growth (RTGG) or templated grain growth (TGG) process.","PeriodicalId":9738,"journal":{"name":"Ceramist","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87546787","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-09-30DOI: 10.31613/ceramist.2021.24.3.05
Sunghoon Hur, Hyun Soo Kim, H. Song
Wireless energy transfer (WET) is the transmission of electric power without any physical connections such as wires. Currently, inductive coupling mediated by electromagnetic (EM) waves is the most common method of WET and is widely used to charge portable devices such as smartphones, Bluetooth earphones, electric shavers, and visual prostheses. However, its application is still limited due to a number of issues including low efficiency, short charging distance, heating problem, and limited choice of transmission medium. Due to these issues, EM-based WET cannot be applied to implantable medical devices, marine cable operation sensors, and electronic devices with electromagnetic interference shielding. Recently, as an alternative to EM-based WET, acoustic energy transfer mediated by sound waves becomes more attractive. Ultrasound offers advantages for transmission in dense media such as liquids or solids and is regardless of electromagnetic shielding. In this review, we investigate recent progress in acoustic power transfer technology in terms of acoustic energy conversion mechanism and provide the future research direction of acoustic power transfer technology.
{"title":"Ultrasound Mediated Wireless Power Transfer Technology","authors":"Sunghoon Hur, Hyun Soo Kim, H. Song","doi":"10.31613/ceramist.2021.24.3.05","DOIUrl":"https://doi.org/10.31613/ceramist.2021.24.3.05","url":null,"abstract":"Wireless energy transfer (WET) is the transmission of electric power without any physical connections such as wires. Currently, inductive coupling mediated by electromagnetic (EM) waves is the most common method of WET and is widely used to charge portable devices such as smartphones, Bluetooth earphones, electric shavers, and visual prostheses. However, its application is still limited due to a number of issues including low efficiency, short charging distance, heating problem, and limited choice of transmission medium. Due to these issues, EM-based WET cannot be applied to implantable medical devices, marine cable operation sensors, and electronic devices with electromagnetic interference shielding. Recently, as an alternative to EM-based WET, acoustic energy transfer mediated by sound waves becomes more attractive. Ultrasound offers advantages for transmission in dense media such as liquids or solids and is regardless of electromagnetic shielding. In this review, we investigate recent progress in acoustic power transfer technology in terms of acoustic energy conversion mechanism and provide the future research direction of acoustic power transfer technology.","PeriodicalId":9738,"journal":{"name":"Ceramist","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80432022","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-09-30DOI: 10.31613/ceramist.2021.24.3.02
Geon‐Tae Hwang, J. Ryu, W. Yoon
Magneto-mechano-electric (MME) conversion composites composed of distinctive magnetostrictive and piezoelectric materials derive interfacial coupling of magnetoelectric conversion between magnetic and electric properties, thus enabling energy harvesting and magnetic sensing. To demonstrate high-performance MME composites and their applications, various research teams have studied tailoring device structures, enhancing material properties, and developing MME application system. This article reviews the recent research progress of MME composites for energy harvesting and magnetic sensing.
{"title":"Recent Reports of Magneto-Mechano-Electric Conversion Composites","authors":"Geon‐Tae Hwang, J. Ryu, W. Yoon","doi":"10.31613/ceramist.2021.24.3.02","DOIUrl":"https://doi.org/10.31613/ceramist.2021.24.3.02","url":null,"abstract":"Magneto-mechano-electric (MME) conversion composites composed of distinctive magnetostrictive and piezoelectric materials derive interfacial coupling of magnetoelectric conversion between magnetic and electric properties, thus enabling energy harvesting and magnetic sensing. To demonstrate high-performance MME composites and their applications, various research teams have studied tailoring device structures, enhancing material properties, and developing MME application system. This article reviews the recent research progress of MME composites for energy harvesting and magnetic sensing.","PeriodicalId":9738,"journal":{"name":"Ceramist","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78674968","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-09-30DOI: 10.31613/ceramist.2021.24.3.03
Jae-Hyeon Cho, W. Jo
Magnetoelectric (ME) multiferroics manifesting the coexistence and the coupling of ferromagnetic and ferroelectric order are appealing widespread interest owing to their fascinating physical behaviors and possible novel applications. In this review, we highlight the progress in single-phase ME multiferroic oxides research in terms of the classification depending on the physical origins of ferroic properties and the corresponding examples for each case, i.e., material by material, along with their ME multiferroic properties including saturation magnetization, spontaneous polarization, (anti)ferromagnetic/ferroelectric transition temperature, and ME coefficient. The magnetoelectrically-active applications of high expectancy are presented by citing the representative examples such as magnetoelectric random-access-memory and multiferroic photovoltaics. Furthermore, we discuss how the development of ME multiferroic oxides should proceed by considering the current research status in terms of developed materials and designed applications. We believe that this short review will provide a basic introduction for the researchers new to this field.
{"title":"Progress in the Development of Single-Phase Magnetoelectric Multiferroic Oxides","authors":"Jae-Hyeon Cho, W. Jo","doi":"10.31613/ceramist.2021.24.3.03","DOIUrl":"https://doi.org/10.31613/ceramist.2021.24.3.03","url":null,"abstract":"Magnetoelectric (ME) multiferroics manifesting the coexistence and the coupling of ferromagnetic and ferroelectric order are appealing widespread interest owing to their fascinating physical behaviors and possible novel applications. In this review, we highlight the progress in single-phase ME multiferroic oxides research in terms of the classification depending on the physical origins of ferroic properties and the corresponding examples for each case, i.e., material by material, along with their ME multiferroic properties including saturation magnetization, spontaneous polarization, (anti)ferromagnetic/ferroelectric transition temperature, and ME coefficient. The magnetoelectrically-active applications of high expectancy are presented by citing the representative examples such as magnetoelectric random-access-memory and multiferroic photovoltaics. Furthermore, we discuss how the development of ME multiferroic oxides should proceed by considering the current research status in terms of developed materials and designed applications. We believe that this short review will provide a basic introduction for the researchers new to this field.","PeriodicalId":9738,"journal":{"name":"Ceramist","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77561237","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-06-30DOI: 10.31613/ceramist.2021.24.2.06
W. Nam, J. Cho
s To solve the global energy problems, investigating renewable and environmentally friendly energy resources has considerable significance. Thermoelectric materials and modules have gained considerable attention because they can directly convert waste heat into electric power while leaving no environmental pollution. The performance of the thermoelectric materials can be determined using the dimensionless figure of merit, ZT. However, trade-off relationships between the thermoelectric parameters (electrical conductivity, Seebeck coefficient, and thermal conductivity) have hindered significant improvement of ZT over the decades. Therefore, independent control of the charge and phonon transports is of great importance. In this respect, CoSb3–based skutterudites showing PGEC (phonon-glass electron-crystal) properties are considered to be promising thermoelectric materials for mid-temperature power generation. In this paper, we review the current status of research in the fields of CoSb3-based thermoelectric materials and modularization techniques.
{"title":"A Brief Review of CoSb3-based Thermoelectric Materials and Modules for Mid-Temperature Power Generation","authors":"W. Nam, J. Cho","doi":"10.31613/ceramist.2021.24.2.06","DOIUrl":"https://doi.org/10.31613/ceramist.2021.24.2.06","url":null,"abstract":"s To solve the global energy problems, investigating renewable and environmentally friendly energy resources has considerable significance. Thermoelectric materials and modules have gained considerable attention because they can directly convert waste heat into electric power while leaving no environmental pollution. The performance of the thermoelectric materials can be determined using the dimensionless figure of merit, ZT. However, trade-off relationships between the thermoelectric parameters (electrical conductivity, Seebeck coefficient, and thermal conductivity) have hindered significant improvement of ZT over the decades. Therefore, independent control of the charge and phonon transports is of great importance. In this respect, CoSb3–based skutterudites showing PGEC (phonon-glass electron-crystal) properties are considered to be promising thermoelectric materials for mid-temperature power generation. In this paper, we review the current status of research in the fields of CoSb3-based thermoelectric materials and modularization techniques.","PeriodicalId":9738,"journal":{"name":"Ceramist","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85032140","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-06-30DOI: 10.31613/ceramist.2021.24.2.03
J. Lim, Hye-jung Cho, Yonghan Jung, J. Roh, W. Shin
s With the development of electric devices such as smart phones or electric vehicles, energy storage systems with high energy/power density and stable operation need to be developed together. The supercapacitors using aqueous electrolyte have great potential for electrochemical energy storage system due to their high power densities and long cyclic performances. The state-of-the-art materials for supercapacitors are carbon based porous materials having high specific surface areas and electrical conductivities. However, they have relatively low energy density that still need to enhance specific capacitance by using the nanostructure of transition metal oxide (TMO) materials. The TMOs store charge through redox reactions like battery systems and their rates are comparable to those of conventional electrochemical double-layer capacitors. In this review, we describe the fundamental principle of TMO based supercapacitors and the recent progress for realizing high performance of TMO based supercapacitors. In addition, we categorize the TMO system as single cation and mixed cations and suggest the prospects for electrochemical energy storage fields.
{"title":"Recent Development of Transition Metal Oxide Based Aqueous Supercapacitor Electrode Materials","authors":"J. Lim, Hye-jung Cho, Yonghan Jung, J. Roh, W. Shin","doi":"10.31613/ceramist.2021.24.2.03","DOIUrl":"https://doi.org/10.31613/ceramist.2021.24.2.03","url":null,"abstract":"s With the development of electric devices such as smart phones or electric vehicles, energy storage systems with high energy/power density and stable operation need to be developed together. The supercapacitors using aqueous electrolyte have great potential for electrochemical energy storage system due to their high power densities and long cyclic performances. The state-of-the-art materials for supercapacitors are carbon based porous materials having high specific surface areas and electrical conductivities. However, they have relatively low energy density that still need to enhance specific capacitance by using the nanostructure of transition metal oxide (TMO) materials. The TMOs store charge through redox reactions like battery systems and their rates are comparable to those of conventional electrochemical double-layer capacitors. In this review, we describe the fundamental principle of TMO based supercapacitors and the recent progress for realizing high performance of TMO based supercapacitors. In addition, we categorize the TMO system as single cation and mixed cations and suggest the prospects for electrochemical energy storage fields.","PeriodicalId":9738,"journal":{"name":"Ceramist","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81162496","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-06-30DOI: 10.31613/ceramist.2021.24.2.02
Seo-jeong Park, C. Ahn, J. W. Lee, Y. Min
s As a new class of novel technologies for fabrication of piezoceramics, the templated grain growth (TGG) has been gaining tremendous attention due to the ability to align ferroelectric domains and thus improve piezoelectric properties, which are similar with the ones of single crystal. Towards the realization of textured grains in a specific direction, two-dimensional template materials should be preferentially needed with some specific conditions such as small lattice mismatch, similar crystal structure and composition compared to those of matrix piezoelectric ceramic powders. This mini review presents recent progress on TGG to provide highperformance textured (K,Na)NbO3 ceramics as an ideal lead-free to lead-based piezoceramics with a focus on the fabrication fundamentals and underlying mechanism. Additionally, some parameters related to the fabrication of green body during a tape casting are surveyed. Finally, we provide an insight into challenges and future directions in the TGG-based piezoceramics.
{"title":"Templated Grain Growth for High-Performance Lead-Free Piezoceramics","authors":"Seo-jeong Park, C. Ahn, J. W. Lee, Y. Min","doi":"10.31613/ceramist.2021.24.2.02","DOIUrl":"https://doi.org/10.31613/ceramist.2021.24.2.02","url":null,"abstract":"s As a new class of novel technologies for fabrication of piezoceramics, the templated grain growth (TGG) has been gaining tremendous attention due to the ability to align ferroelectric domains and thus improve piezoelectric properties, which are similar with the ones of single crystal. Towards the realization of textured grains in a specific direction, two-dimensional template materials should be preferentially needed with some specific conditions such as small lattice mismatch, similar crystal structure and composition compared to those of matrix piezoelectric ceramic powders. This mini review presents recent progress on TGG to provide highperformance textured (K,Na)NbO3 ceramics as an ideal lead-free to lead-based piezoceramics with a focus on the fabrication fundamentals and underlying mechanism. Additionally, some parameters related to the fabrication of green body during a tape casting are surveyed. Finally, we provide an insight into challenges and future directions in the TGG-based piezoceramics.","PeriodicalId":9738,"journal":{"name":"Ceramist","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87049605","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-06-30DOI: 10.31613/ceramist.2021.24.2.07
Sungchul Baek
s Metal-halide perovskite nanocrystals have attracted great scientific attention in the field of light-emitting diode (LED) due to their excellent optical and electrical properties such as narrow emission linewidth, photoluminescence quantum yield approaching unity, high charge carrier mobility, and halogen anion composition-dependent tunable bandgap. Over the last few years, considerable progress has been achieved on red and green perovskite LEDs (external quantum efficiencies exceeding 20%), however, the performance of blue LEDs still lags far behind that of red and green counterparts. In this review, overall background of perovskite nanocrystal and research progress of perovskite nanocrystal-based blue LEDs are summarized.
{"title":"A Mini-Review on Blue Light-Emitting Diodes Based on Metal-Halide Perovskite Nanocrystals","authors":"Sungchul Baek","doi":"10.31613/ceramist.2021.24.2.07","DOIUrl":"https://doi.org/10.31613/ceramist.2021.24.2.07","url":null,"abstract":"s Metal-halide perovskite nanocrystals have attracted great scientific attention in the field of light-emitting diode (LED) due to their excellent optical and electrical properties such as narrow emission linewidth, photoluminescence quantum yield approaching unity, high charge carrier mobility, and halogen anion composition-dependent tunable bandgap. Over the last few years, considerable progress has been achieved on red and green perovskite LEDs (external quantum efficiencies exceeding 20%), however, the performance of blue LEDs still lags far behind that of red and green counterparts. In this review, overall background of perovskite nanocrystal and research progress of perovskite nanocrystal-based blue LEDs are summarized.","PeriodicalId":9738,"journal":{"name":"Ceramist","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91456988","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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