TY - JOUR
T1 - Effect of Carrier Balance on Device Degradation of Organic Light-Emitting Diodes Based on Thermally Activated Delayed Fluorescence Emitters
AU - Tanaka, Masaki
AU - Noda, Hiroki
AU - Nakanotani, Hajime
AU - Adachi, Chihaya
N1 - Funding Information:
This work was supported financially by the Program for Building Regional Innovation Ecosystems of the Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan. The authors thank Keiko Kusuhara and Nozomi Nakamura of Kyushu University for providing the chemicals for the OLEDs, and Dr. Chin-Yiu Chan and Dr. Yoichi Tsuchiya of Kyushu University for their support in performing the cyclic voltammetry measurements and the HOD/EOD tests, respectively. All authors took part in the conception of this research. M. Tanaka designed the experiments, fabricated all samples and measured their performances. The project was supervised by C. Adachi. All authors discussed the results and contributed to the writing of the article.
Publisher Copyright:
© 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
PY - 2019/5
Y1 - 2019/5
N2 - The relatively short device lifetime of blue organic light-emitting diodes (OLEDs) when compared with the lifetimes of green and red OLEDs is one of the crucial problems that must be overcome to enable practical application of these devices to full-color OLED displays. This work focuses on the degradation phenomena of OLEDs that are based on sky-blue thermally activated delayed fluorescence emitters and clarifies the degradation mechanisms based on spectral change of the electroluminescence, which indicates the formation of electromer emission from an electron transport layer. Additionally, it is determined that the change in the carrier balance that occurs during this degradation process can be ascribed to the formation of electron traps.
AB - The relatively short device lifetime of blue organic light-emitting diodes (OLEDs) when compared with the lifetimes of green and red OLEDs is one of the crucial problems that must be overcome to enable practical application of these devices to full-color OLED displays. This work focuses on the degradation phenomena of OLEDs that are based on sky-blue thermally activated delayed fluorescence emitters and clarifies the degradation mechanisms based on spectral change of the electroluminescence, which indicates the formation of electromer emission from an electron transport layer. Additionally, it is determined that the change in the carrier balance that occurs during this degradation process can be ascribed to the formation of electron traps.
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U2 - 10.1002/aelm.201800708
DO - 10.1002/aelm.201800708
M3 - Article
AN - SCOPUS:85061272652
SN - 2199-160X
VL - 5
JO - Advanced Electronic Materials
JF - Advanced Electronic Materials
IS - 5
M1 - 1800708
ER -