72010410 NIP & Digital Fabrication Conference nip digi fabric conf 2169-4451 Society of Imaging Science and Technology 7003 Kilworth Lane, Springfield, VA 22151, USA 10.2352/ISSN.2169-4451.1999.15.1.art00095_2 2169-4451(19990101)1999:2L.747;1- nip_v1999n2/splitsection95.xml /ist/nipdf/1999/00001999/00000002/art00095 Articles OLED Performance and the Use of a Hole Transport Molecule Dissolved in a High Tg Host Polymer Santerre F. Dodelet J.P. Sun Y. Hlil A. R. Hay A. S. D'Iorio M. 01 01 1999 1999 2 747 750 1999

TPD has been dissolved in A435, a high Tg host polymer, in order to inhibit the crystallization of the hole transport molecule. Solid solutions of TPD have been obtained for a TPD content, x, ranging from 25 to 90 wt%. A435 + x TPD films coated onto ITO are stable during at least 72h at 150°C, for TPD contents of 50 wt% and below. OLEDs having the structure: ITO / A435 + x TPD/ Alq3 /Mg have been prepared and measured. Maximum luminances of about 2000 cd/m2 are obtained for x ≥ 50 wt% TPD. The maximum quantum yield of these devices is 1.4%.