Tissa Sajoto
University of Southern California
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Publication
Featured researches published by Tissa Sajoto.
Applied Physics Letters | 2005
Russell J. Holmes; Stephen R. Forrest; Tissa Sajoto; Arnold Tamayo; Peter I. Djurovich; Mark E. Thompson; Jason Brooks; Yeh-Jiun Tung; B. W. D’Andrade; Michael S. Weaver; Raymond Kwong; Julie J. Brown
We demonstrate saturated, deep blue organic electrophosphorescence using the facial- and meridianal- isomers of the fluorine-free emitter tris(phenyl-methyl-benzimidazolyl)iridium(III)(f-Ir(pmb)3 and m-Ir(pmb)3, respectively) doped into the wide energy gap host, p-bis(triphenylsilyly)benzene (UGH2). The highest energy electrophosphorescent transition occurs at a wavelength of λ=389nm for the fac- isomer and λ=395nm for the mer- isomer. The emission chromaticity is characterized by Commission Internationale de l’Eclairage coordinates of (x=0.17,y=0.06) for both isomers. Peak quantum and power efficiencies of (2.6±0.3)% and (0.5±0.1)lm∕W and (5.8±0.6)% and (1.7±0.2)lm∕W are obtained using f-Ir(pmb)3 andm-Ir(pmb)3 respectively. This work represents a departure from previously explored, fluorinated blue phosphors, and demonstrates an efficient deep blue/near ultraviolet electrophosphorescent device.
SID Symposium Digest of Technical Papers | 2005
Mark E. Thompson; Jian Li; Arnold Tamayo; Tissa Sajoto; Peter I. Djurovich; Stephen R. Forrest; Russell J. Holmes; Julie J. Brown; Jason Brooks
In this paper, we describe different strategies for achieving efficient blue electrophosphorescence. The first approach involves the use of ancillary ligand tuning of emission. The emissive unit is an organometallic Ir fragment, whose triplet energy is tuned by the choice of ancillary ligand. This approach is useful for making blue emitters, but luminance efficiency drops when the energy is shifted to saturated blue. The second approach described here is to shift the cyclometallated ligand from phenyl-pyridine to either a phenyl-pyrrazole or phenyl-imidazole. Both complexes emit strongly in the near UV, however, only the imidazole complex (carbene ligand) emits strongly at room temperature.
conference on lasers and electro optics | 2005
Mark E. Thompson; Arnold Tamayo; Tissa Sajoto; Peter I. Djurovich; Stephen R. Forrest; Russell J. Holmes; Julie J. Brown; Jason Brooks
In this paper, we describe several new Ir complexes for achieving efficient blue electrophosphorescence. The approach described here for achieving blue phosphorescence is to shift the cyclometallated ligand from phenyl-pyridine to either a phenyl pyrrazole or phenyl-imidazole. Both complexes emit strongly in the near UV, however, only the imidazole complex (carbene ligand) emits strongly at room temperature.
Inorganic Chemistry | 2005
Tissa Sajoto; Peter I. Djurovich; Arnold Tamayo; Muhammed Yousufuddin; Robert Bau; Mark E. Thompson; Russell J. Holmes; Stephen R. Forrest
Inorganic Chemistry | 2005
Arnold Tamayo; Simona Garon; Tissa Sajoto; Peter I. Djurovich; Irina Tsyba; and Robert Bau; Mark E. Thompson
Journal of the American Chemical Society | 2009
Tissa Sajoto; Peter I. Djurovich; Arnold Tamayo; Jonas Oxgaard; William A. Goddard; Mark E. Thompson
Archive | 2004
Mark E. Thompson; Arnold Tamayo; Peter I. Djurovich; Tissa Sajoto
Archive | 2005
Chun Lin; Jui-Yi Tsai; Jason Brooks; Bert Alleyne; Mark E. Thompson; Peter I. Djurovich; Arnold Tamayo; Tissa Sajoto; Robert W. Walters
Organic Electronics | 2006
Russell J. Holmes; Stephen R. Forrest; Tissa Sajoto; Arnold Tamayo; Peter I. Djurovich; Mark E. Thompson
Frontiers in Optics 2007/Laser Science XXIII/Organic Materials and Devices for Displays and Energy Conversion (2007), paper OTuC1 | 2007
Mark E. Thompson; Stephen R. Forrest; Julie J. Brown; Tissa Sajoto; Peter I. Djurovich; Carsten Borek; Dolores Perez; Yiru Sun; Jason Brooks