P‐207: Late‐News Poster: Efficient Emitter Aggregation Management Using High‐Entropy Non‐crystallizable Hosts

• DOI: 10.1002/sdtp.12468
• Publication Date: 2018-06-01T00:48:19Z
• Authors: Rajarshi Chakraborty; Mike F. Molaire; David S. Weiss; Tianhao Yu; Lewis J. Rothberg
• Keywords: 0103 physical sciences; 01 natural sciences

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 – OLEDIQTM HT‐1700 vs. standard mCBP host shows that aggregation quenching is higher in mCBP. Triplet‐triplet annihilation (TTA) in these hosts is also explored.