Carborane-Based Optoelectronically Active Organic Molecules: Wide Band Gap Host Materials for Blue Phosphorescence
DC Field | Value | Language |
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dc.contributor.author | Wee, Kyung-Ryang | - |
dc.contributor.author | Cho, Yang-Jin | - |
dc.contributor.author | Jeong, Soyeong | - |
dc.contributor.author | Kwon, Soonnam | - |
dc.contributor.author | Lee, Jong-Dae | - |
dc.contributor.author | Suh, Il-Hwan | - |
dc.contributor.author | Kang, Sang Ook | - |
dc.date.accessioned | 2021-09-06T14:07:27Z | - |
dc.date.available | 2021-09-06T14:07:27Z | - |
dc.date.created | 2021-06-15 | - |
dc.date.issued | 2012-10-31 | - |
dc.identifier.issn | 0002-7863 | - |
dc.identifier.uri | https://scholar.korea.ac.kr/handle/2021.sw.korea/107168 | - |
dc.description.abstract | Carborane-based host materials were prepared to fabricate deep blue phosphorescence organic light-emitting diodes (PHOLEDs), which constituted three distinctive geometrical structures stemming from the corresponding three different isomeric forms of carboranes, namely, ortho-, meta-, and para-carboranes. These materials consist of two carbazolyl phenyl (CzPh) groups as photoactive units on each side of the carborane carbons to be bis[4-(N-carbazolyl)phenyl]carboranes, o-Cb, m-Cb, and p-Cb. To elaborate on the role of the carboranes, comparative analogous benzene series (o-Bz, m-Bz, and p-Bz) were prepared, and their photophysical properties were compared to show that advantageous photophysical properties were originated from the carborane structures: high triplet energy. Unlike m-Bz and p-Bz, carborane-based m-Cb and p-Cb showed an unconjugated nature between two CzPh units, which is essential for the blue phosphorescent materials. Also, the carborane hosts showed high glass transition temperatures (T-g) of 132 and 164 C for m-Cb and p-Cb, respectively. Albeit p-Cb exhibited slightly lower hole mobility when compared to p-Bz, it still lies at the high end hole mobility with a value of 1.1 X 10(-3) cm(2)/(V s) at an electric field of 5 x 10(5) V/cm. Density functional theory (DFT) calculations revealed that triplet wave functions were effectively confined and mostly located at either side of the carbazolyl units for m-Cb and p-Cb. Low-temperature PL spectra indeed provided unequivocal data with higher triplet energy (T-1) of 3.1 eV for both m-Cb and p-Cb. p-Cb was successfully used as a host in deep blue PHOLEDs to provide a high external quantum efficiency of 15.3% and commission internationale de l'elcairage (CIE) coordinates of (0.15, 0.24). | - |
dc.language | English | - |
dc.language.iso | en | - |
dc.publisher | AMER CHEMICAL SOC | - |
dc.subject | LIGHT-EMITTING-DIODES | - |
dc.subject | THERMODYNAMIC PARAMETERS | - |
dc.subject | THERMAL-STABILITY | - |
dc.subject | DYE GLASSES | - |
dc.subject | EMISSION | - |
dc.subject | OLEDS | - |
dc.subject | ELECTROLUMINESCENCE | - |
dc.subject | SUBSTITUTION | - |
dc.subject | TRANSPORT | - |
dc.subject | DESIGN | - |
dc.title | Carborane-Based Optoelectronically Active Organic Molecules: Wide Band Gap Host Materials for Blue Phosphorescence | - |
dc.type | Article | - |
dc.contributor.affiliatedAuthor | Kang, Sang Ook | - |
dc.identifier.doi | 10.1021/ja3066623 | - |
dc.identifier.scopusid | 2-s2.0-84868091776 | - |
dc.identifier.wosid | 000310483500027 | - |
dc.identifier.bibliographicCitation | JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, v.134, no.43, pp.17982 - 17990 | - |
dc.relation.isPartOf | JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | - |
dc.citation.title | JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | - |
dc.citation.volume | 134 | - |
dc.citation.number | 43 | - |
dc.citation.startPage | 17982 | - |
dc.citation.endPage | 17990 | - |
dc.type.rims | ART | - |
dc.type.docType | Article | - |
dc.description.journalClass | 1 | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Chemistry | - |
dc.relation.journalWebOfScienceCategory | Chemistry, Multidisciplinary | - |
dc.subject.keywordPlus | LIGHT-EMITTING-DIODES | - |
dc.subject.keywordPlus | THERMODYNAMIC PARAMETERS | - |
dc.subject.keywordPlus | THERMAL-STABILITY | - |
dc.subject.keywordPlus | DYE GLASSES | - |
dc.subject.keywordPlus | EMISSION | - |
dc.subject.keywordPlus | OLEDS | - |
dc.subject.keywordPlus | ELECTROLUMINESCENCE | - |
dc.subject.keywordPlus | SUBSTITUTION | - |
dc.subject.keywordPlus | TRANSPORT | - |
dc.subject.keywordPlus | DESIGN | - |
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