Realizing high-performance color-tunable WOLED by adjusting the recombination zone and energy distribution in the emitting layer

Autor:	Zhiqi Kou, Baiqian Wang, Lijun Wang, Xu Sun, Juan Zhou, Xiang Chen, Zixuan Zheng
Rok vydání:	2021
Předmět:	Energy distribution Materials science Acoustics and Ultrasonics business.industry Optoelectronics Condensed Matter Physics business Layer (electronics) Recombination Surfaces Coatings and Films Electronic Optical and Magnetic Materials
Zdroj:	Journal of Physics D: Applied Physics. 54:265107
ISSN:	1361-6463 0022-3727
DOI:	10.1088/1361-6463/abf258
Popis:	Color-tunable white organic light-emitting diodes (CT-WOLEDs) having daylight chromaticity and a wide correlated color temperature (CCT) span can mimic our circadian cycle and realize application for lighting or decoration. The effects of the recombination zone and energy distribution on the electro-optical properties and color span are investigated in this paper. We find that it is beneficial to expand the CCT span by increasing the distance between the red ultrathin phosphorescent emissive layer and the center of the recombination zone. By increasing the concentration (y) of mCP in mixed host material in the emitting layer and the thickness (z nm) of the red ultrathin phosphorescent emissive layer, the CCT spans can be expanded towards high CCT and low CCT, respectively. The widest CCT span reaches 4032 K (2391–6423 K) in a simple all-phosphorescent CT-WOLED with a maximum luminance and power efficiency of 9249 cd m−2 and 15.35 lm W−1, respectively.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::9edf818cbe49ca4d71d844f9669df726 https://doi.org/10.1088/1361-6463/abf258 Zobrazit plný text záznamu