# Supplementary Material (ESI) for New Journal of Chemistry # This journal is © The Royal Society of Chemistry and # The Centre National de la Recherche Scientifique, 2002 High Efficiency Single Dopant White Electrophosphorescent Light Emitting Diodes Vadim Adamovich1, Jason Brooks1, Arnold Tamayo1, Alex M Alexander1, Peter I Djurovich1, Brian W D’Andrade3, Chihaya Adachi2, Stephen R Forrest3* and Mark E Thompson1* University of Southern California, Department of Chemistry, Los Angeles, CA 90089 Department of Photonics Materials Science, Chitose Institute of Science & Technology, 758-65 Bibi, Chitose 066-8655, Japan Center for Photonics and Optoelectronic Materials (POEM), Princeton Materials Institute (PMI), Department of Electrical Engineering, Princeton University, Princeton, NJ 08544 Supplementary Materials Absorption and emission spectra for CBP N N Emission/absorption Intensity (arb units) CBP 1.0 Absorbance Emission 0.8 Lifetime at 460 nm > second M.A Baldo, and S R Forrest, Phys Rev B, 2000, 62, 10958-10966 0.6 0.4 0.2 0.0 250 300 350 400 450 500 550 Wavelength, nm 600 650 Absorption and emission spectra and luminescent decay curves for mCP N N 1.0 absorbance emission 0.8 luminescence lifetime at 440 nm = seconds 0.6 0.4 0.2 0.0 300 350 400 450 500 550 Wavelength (nm) raw data biexponential fit 100000 Intenstity at 440 nm (# counts) Emission/absorbance Intensity (arb units) mCP Chi^2/DoF = 62479.26432 R^2 = 0.99986 80000 A1 t1 A2 t2 60000 40000 4.1 x 10 1.3 sec 8.5 x 10 8.2 sec 20000 10 20 30 40 Time (seconds) 50 60 N luminescence lifetime at 414 nm = 15 microseconds N Ir absorbance PL at 77 K Irppz 300 400 Wavelength (nm) 500 600 Emission Intensity (a.u.) -1 -1 (Molar Absorbance (10 M cm ) Absorption and emission spectra for Ir(III) fac-tris(1-phenylpyrazole) (Irppz) The photoluminescence spectra for Pt complex doped into CBP The doping levels for each spectrum are indicated in legend to each plot N F O Pt O F FPt4 in CBP PL Emission 5% 11% 15% 20% PL emission 1.0 0.8 0.6 0.4 0.2 0.0 350 400 450 500 550 600 650 700 750 800 Wavelength, nm