Jina Lee, Yeonju Jeong, Sunhee Lee, Yi Sak Lee, Bubae Park, Taekyung Kim and Won-Sik Han
{"title":"邻碳硼烷衍生物的光物理特性调制及其在白色有机发光二极管器件中的应用†。","authors":"Jina Lee, Yeonju Jeong, Sunhee Lee, Yi Sak Lee, Bubae Park, Taekyung Kim and Won-Sik Han","doi":"10.1039/D4TC03085K","DOIUrl":null,"url":null,"abstract":"<p >Two derivatives of <em>o</em>-carborane (<em>o</em>-Cb) were synthesized, enabling effective modulation of their photophysical properties by varying the substituents on the carbon atom within the <em>o</em>-Cb cage. <strong>CAPCb</strong> incorporates phenyl groups into the carbazole–anthracene motif, demonstrating weak dual emissions in solution due to efficient charge transfer (CT) from the carbazole to the <em>o</em>-Cb groups. In contrast, its methyl analog (<strong>CAMCb</strong>) primarily emits from a locally excited (LE) state in solution. The most notable characteristics were revealed in their solid-state photochemistry. <strong>CAMCb</strong> displayed multiple photoemissions in the film state, featuring strong LE emission at 450 nm and slightly weaker CT emission at 640 nm. In comparison, <strong>CAPCb</strong> exhibited weaker LE emission at 430 nm and stronger CT emission at 620 nm. This indicates that the CT states can be selectively activated or deactivated based on the substituents on the <em>o</em>-Cb and the phase. Minor modifications in molecular geometries through changes in the substituents at the <em>o</em>-Cb cage significantly influence their excited-state properties and emission characteristics. The distinct properties of <strong>CAPCb</strong> and <strong>CAMCb</strong> were utilized in the fabrication of white OLED devices, which demonstrated cool white emission with Commission Internationale de L’Eclairage (CIE) coordinates of (0.37, 0.30) and a correlated color temperature (CCT) of 3556 K measured at 500 cd m<small><sup>−2</sup></small>.</p>","PeriodicalId":84,"journal":{"name":"Journal of Materials Chemistry C","volume":" 43","pages":" 17554-17562"},"PeriodicalIF":5.7000,"publicationDate":"2024-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Modulation of photophysical properties in o-carborane derivatives and their application in white organic light-emitting diode devices†\",\"authors\":\"Jina Lee, Yeonju Jeong, Sunhee Lee, Yi Sak Lee, Bubae Park, Taekyung Kim and Won-Sik Han\",\"doi\":\"10.1039/D4TC03085K\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p >Two derivatives of <em>o</em>-carborane (<em>o</em>-Cb) were synthesized, enabling effective modulation of their photophysical properties by varying the substituents on the carbon atom within the <em>o</em>-Cb cage. <strong>CAPCb</strong> incorporates phenyl groups into the carbazole–anthracene motif, demonstrating weak dual emissions in solution due to efficient charge transfer (CT) from the carbazole to the <em>o</em>-Cb groups. In contrast, its methyl analog (<strong>CAMCb</strong>) primarily emits from a locally excited (LE) state in solution. The most notable characteristics were revealed in their solid-state photochemistry. <strong>CAMCb</strong> displayed multiple photoemissions in the film state, featuring strong LE emission at 450 nm and slightly weaker CT emission at 640 nm. In comparison, <strong>CAPCb</strong> exhibited weaker LE emission at 430 nm and stronger CT emission at 620 nm. This indicates that the CT states can be selectively activated or deactivated based on the substituents on the <em>o</em>-Cb and the phase. Minor modifications in molecular geometries through changes in the substituents at the <em>o</em>-Cb cage significantly influence their excited-state properties and emission characteristics. 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Modulation of photophysical properties in o-carborane derivatives and their application in white organic light-emitting diode devices†
Two derivatives of o-carborane (o-Cb) were synthesized, enabling effective modulation of their photophysical properties by varying the substituents on the carbon atom within the o-Cb cage. CAPCb incorporates phenyl groups into the carbazole–anthracene motif, demonstrating weak dual emissions in solution due to efficient charge transfer (CT) from the carbazole to the o-Cb groups. In contrast, its methyl analog (CAMCb) primarily emits from a locally excited (LE) state in solution. The most notable characteristics were revealed in their solid-state photochemistry. CAMCb displayed multiple photoemissions in the film state, featuring strong LE emission at 450 nm and slightly weaker CT emission at 640 nm. In comparison, CAPCb exhibited weaker LE emission at 430 nm and stronger CT emission at 620 nm. This indicates that the CT states can be selectively activated or deactivated based on the substituents on the o-Cb and the phase. Minor modifications in molecular geometries through changes in the substituents at the o-Cb cage significantly influence their excited-state properties and emission characteristics. The distinct properties of CAPCb and CAMCb were utilized in the fabrication of white OLED devices, which demonstrated cool white emission with Commission Internationale de L’Eclairage (CIE) coordinates of (0.37, 0.30) and a correlated color temperature (CCT) of 3556 K measured at 500 cd m−2.
期刊介绍:
The Journal of Materials Chemistry is divided into three distinct sections, A, B, and C, each catering to specific applications of the materials under study:
Journal of Materials Chemistry A focuses primarily on materials intended for applications in energy and sustainability.
Journal of Materials Chemistry B specializes in materials designed for applications in biology and medicine.
Journal of Materials Chemistry C is dedicated to materials suitable for applications in optical, magnetic, and electronic devices.
Example topic areas within the scope of Journal of Materials Chemistry C are listed below. This list is neither exhaustive nor exclusive.
Bioelectronics
Conductors
Detectors
Dielectrics
Displays
Ferroelectrics
Lasers
LEDs
Lighting
Liquid crystals
Memory
Metamaterials
Multiferroics
Photonics
Photovoltaics
Semiconductors
Sensors
Single molecule conductors
Spintronics
Superconductors
Thermoelectrics
Topological insulators
Transistors