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P‐207: Late‐News Poster: Efficient Emitter Aggregation Management Using High‐Entropy Non‐crystallizable Hosts
Author(s) -
Chakraborty Rajarshi,
Molaire Mike F.,
Weiss David S.,
Yu Tianhao,
Rothberg Lewis J.
Publication year - 2018
Publication title -
sid symposium digest of technical papers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.351
H-Index - 44
eISSN - 2168-0159
pISSN - 0097-966X
DOI - 10.1002/sdtp.12468
Subject(s) - common emitter , phosphorescence , oled , materials science , biphenyl , annihilation , optoelectronics , nanotechnology , chemistry , optics , physics , organic chemistry , layer (electronics) , quantum mechanics , fluorescence
Molecular Glasses Inc. has developed a new class of high‐entropy non‐crystallizable OLED hosts that can be deposited by both vacuum/thermal evaporation and solution‐based processes such as inkjet printing. Benchmark testing demonstrated a 4‐15 times improvement in OLED lifetime using these hosts instead of conventional host 3, 3‐di(9H‐carbazol‐9‐yl) biphenyl (mCBP). Time resolved photoemission spectroscopy on a yellow phosphorescent emitter in a non‐crystallizable host – OLEDIQ TM HT‐1700 vs. standard mCBP host shows that aggregation quenching is higher in mCBP. Triplet‐triplet annihilation (TTA) in these hosts is also explored.