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An indenocarbazole-based host material for solution processable green phosphorescent organic light emitting diodes

We designed and synthesized a new host material with a highly soluble and thermally stable indenocarbazole derivative (7,7-dimethyl-5-phenyl-2-(9-phenyl-9H-carbazol-3-yl)-5,7-dihydro-indeno[2,1-b]carbazole) that can make green phosphorescent organic light-emitting diodes (PHOLEDs) in a solution proc...

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Autores principales: Park, Eun Young, Lee, Da Hwan, Le, Thi Na, Shin, Chol-Min, Lee, Jihoon, Suh, Min Chul
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society of Chemistry 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9040653/
https://www.ncbi.nlm.nih.gov/pubmed/35492068
http://dx.doi.org/10.1039/d1ra04855d
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author Park, Eun Young
Lee, Da Hwan
Le, Thi Na
Shin, Chol-Min
Lee, Jihoon
Suh, Min Chul
author_facet Park, Eun Young
Lee, Da Hwan
Le, Thi Na
Shin, Chol-Min
Lee, Jihoon
Suh, Min Chul
author_sort Park, Eun Young
collection PubMed
description We designed and synthesized a new host material with a highly soluble and thermally stable indenocarbazole derivative (7,7-dimethyl-5-phenyl-2-(9-phenyl-9H-carbazol-3-yl)-5,7-dihydro-indeno[2,1-b]carbazole) that can make green phosphorescent organic light-emitting diodes (PHOLEDs) in a solution process. In particular, these are used in a blue common layer structure in which green and red-emitting layers are formed by a solution process and blue common layers are thermally evaporated. The new host material possesses excellent hole transport capability and high triplet energy (T(1)). Mainly we designed the hole dominant material to keep the exciton forming area away from the hole transport layer (HTL) and emitting layer (EML) interface, an interfacial mixing area to improve device performance. As a result, the greatest lifetime of 1300 hours was achieved and a high current efficiency of up to 66.3 cd A(−1) was recorded when we used the optimized device structure of a 5 nm thick bipolar exciton blocking layer (B-EBL). It may be a good agreement of exciton confinement and reduced electron accumulation at the HTL and EML interface.
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spelling pubmed-90406532022-04-26 An indenocarbazole-based host material for solution processable green phosphorescent organic light emitting diodes Park, Eun Young Lee, Da Hwan Le, Thi Na Shin, Chol-Min Lee, Jihoon Suh, Min Chul RSC Adv Chemistry We designed and synthesized a new host material with a highly soluble and thermally stable indenocarbazole derivative (7,7-dimethyl-5-phenyl-2-(9-phenyl-9H-carbazol-3-yl)-5,7-dihydro-indeno[2,1-b]carbazole) that can make green phosphorescent organic light-emitting diodes (PHOLEDs) in a solution process. In particular, these are used in a blue common layer structure in which green and red-emitting layers are formed by a solution process and blue common layers are thermally evaporated. The new host material possesses excellent hole transport capability and high triplet energy (T(1)). Mainly we designed the hole dominant material to keep the exciton forming area away from the hole transport layer (HTL) and emitting layer (EML) interface, an interfacial mixing area to improve device performance. As a result, the greatest lifetime of 1300 hours was achieved and a high current efficiency of up to 66.3 cd A(−1) was recorded when we used the optimized device structure of a 5 nm thick bipolar exciton blocking layer (B-EBL). It may be a good agreement of exciton confinement and reduced electron accumulation at the HTL and EML interface. The Royal Society of Chemistry 2021-09-01 /pmc/articles/PMC9040653/ /pubmed/35492068 http://dx.doi.org/10.1039/d1ra04855d Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by-nc/3.0/
spellingShingle Chemistry
Park, Eun Young
Lee, Da Hwan
Le, Thi Na
Shin, Chol-Min
Lee, Jihoon
Suh, Min Chul
An indenocarbazole-based host material for solution processable green phosphorescent organic light emitting diodes
title An indenocarbazole-based host material for solution processable green phosphorescent organic light emitting diodes
title_full An indenocarbazole-based host material for solution processable green phosphorescent organic light emitting diodes
title_fullStr An indenocarbazole-based host material for solution processable green phosphorescent organic light emitting diodes
title_full_unstemmed An indenocarbazole-based host material for solution processable green phosphorescent organic light emitting diodes
title_short An indenocarbazole-based host material for solution processable green phosphorescent organic light emitting diodes
title_sort indenocarbazole-based host material for solution processable green phosphorescent organic light emitting diodes
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9040653/
https://www.ncbi.nlm.nih.gov/pubmed/35492068
http://dx.doi.org/10.1039/d1ra04855d
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