Spectrum change of blue phosphorescent organic light emitting diodes with CBP and firpic

Chan Jae Lee, Do Yeol Yoon, Dae Gyu Moon, Duck Kyun Choi, Jeong In Han

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

In the blue phosphorescent organic light emitting devices (phOLEDs) with CBP:FIrpic, the relative intensity change of two peak, 465nm and 495nm were analyzed as degradation. As device is maintained on state, peak of 500nm is relatively increased than 465nm. It seems that these phenomena are induced by microcavity effect due to recombination region shift. As device is continuously driven, carrier blocking property of BCP is deteriorated and then recombination region is changed. Also the low triplet blocking property due to degradation of BCP let the EL spectrum to shift toward long wavelength and broaden.

Original languageEnglish
Title of host publicationECS Transactions - Physics and Chemistry of Luminescent Materials, Including the 4th Symposium on Persistent Phosphors
PublisherElectrochemical Society Inc.
Pages17-22
Number of pages6
Edition31
ISBN (Print)9781615673056
DOIs
StatePublished - 2009
EventPhysics and Chemistry of Luminescent Materials, Including the 4th Symposium on Persistent Phosphors - 214th ECS Meeting - Honolulu, HI, United States
Duration: 12 Oct 200817 Oct 2008

Publication series

NameECS Transactions
Number31
Volume16
ISSN (Print)1938-5862
ISSN (Electronic)1938-6737

Conference

ConferencePhysics and Chemistry of Luminescent Materials, Including the 4th Symposium on Persistent Phosphors - 214th ECS Meeting
Country/TerritoryUnited States
CityHonolulu, HI
Period12/10/0817/10/08

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