Dr. D’Andrade’s expertise is in issues pertaining to electrical and electronic engineering, particularly in microelectronics systems and organic or inorganic semiconductor materials and devices. He has almost a decade of experience in the design, failure analysis, and physics of organic light emitting devices (OLEDs), and his projects included the development of several types of OLEDs including stacked/tandem structures, inverted and transparent devices, optical microcavities, and multiple white architectures for flat panel displays and illumination sources. His expertise in solid-state device operational degradation is based on projects that probed the fundamental physics of device operation and chemical interactions between organic semiconductors and impurities.
Prior to joining Exponent, Dr. D’Andrade was the principal investigator or senior scientist on over 12 small business innovation research (SBIR) and solid-state lighting grants from the U.S. Department of Energy. He successfully managed projects that delivered world-record white OLED power efficacies, and assisted in the development of the DOE multi-year program plan for organic solid-state lighting. His work on these SBIR grants explored novel device architectures, engineered higher external quantum and optical outcoupling efficiencies, reduced device power consumption, and improved white OLED operational longevity.
Additionally, Dr. D’Andrade has expertise in or significant knowledge of solid-state semiconductor characterization, fabrication, processing, and analytical tools, including: ultra-violet photoemission spectroscopy, X-ray photoemission spectroscopy, spectroscopic ellipsometry, time-correlated single photon counting, streak camera temporal spectroscopy, FTIR, cryogenic refrigeration, ultra-high vacuum equipment, organic molecular beam epitaxy, e-beam evaporation, imaging and integrating spheres, sputtering, chemical vapor deposition, organic vapor phase deposition, spectroradiometers, thermal imaging, photoluminescence quantum yield, cyclic voltammetry, encapsulation, and thermal evaporation of organic materials.
Dr. D’Andrade also has processing skills with photolithography, solvent batch cleaning, UV-ozone and plasma cleaners, profilometry, and wet chemistry, which are utilized in the cleaning, patterning, and treating of transparent conductive oxides and other solid-state devices. Besides hands-on experience with operating the instruments listed above, Dr. D’Andrade has worked with data from scanning/tunneling electron microscopy, atomic force microscopy, scanning electron microscopy, inverse photoelectron spectroscopy, and energy dispersive x-ray spectroscopy.
D’Andrade B, Kattamis AZ. Flexible active-matrix organic light emitting displays. Silicon Valley Engineering Council J 2009; 1:18–21.
D’Andrade BW, Esler J, Lin C, Adamovich V, Xia S, Weaver MS, Kwong R, Brown J. White phosphorescent OLEDs. Maximizing the power efficacy lifetime product. Digest of Technical Papers of IMID/IDMC/Asia Display 2008.
D’Andrade BW, Weaver MS, Brown J. The great white organic hope. Photonics Spectra 2008; 42.
Giebink NC, D’Andrade BW, Weaver MS, Mackenzie PB, Brown JJ, Thompson ME, Forrest SR. Intrinsic luminance loss in phosphorescent small-molecule organic light emitting devices due to bimolecular annihilation reactions. J Appl Phys 2008; 103(4):044509-044501.
D’Andrade BW, Weaver MS, Mackenzie PB, Yamamoto H, Brown JJ, Giebink NC, Forrest SR, Thompson ME. Blue phosphorescent organic light emitting device stability analysis. Proceedings SID, Vol. 39, 2008.
D’Andrade BW, Esler J, Lin C, Weaver MS, Brown J. Extremely long lived white phosphorescent organic light emitting device with minimum organic materials. Proceedings SID, Vol. 39, 2008.
D’Andrade BW, Esler J, Lin C, Adamovich V, Xia S, Weaver MS, Kwong R, Brown JJ. Realizing white phosphorescent 100 lm/W OLED efficacy. Proceedings, SPIE, Vol. 7051, 2008.
D’Andrade B, Adamovich V, Weaver M, Lin C, Ma B, Mackenzie PB, Kwong R, Brown JJ. Phosphorescent OLEDs with saturated colors. Proceedings, SPIE, Vol. 6655, pp. 645–647, 2007.
D’Andrade B, Canzler TW, Hack M. PIN OLEDs—Enhanced performance and lifetime by improved structures and materials. Proceedings, IMDC, 2007.
D'Andrade B. White phosphorescent LEDs offer efficient answer. Nat Photonics 2007; 1(1):33–34.
D’Andrade BW, Tsai J-Y, Lin C, Weaver MS, Mackenzie PB, Brown JJ. Efficient white phosphorescent organic light-Emitting devices. Proceedings, SID, Vol. 38, pp. 1026–1029, 2007.
D’Andrade B, Weaver MS, Brown JJ. White phosphorescent organic light emitting devices. Proceedings, SPIE, Vol. 6655, pp. 6332–6334, 2007.
Weaver MS, Adamovich VI, D’Andrade B, Ma B, Kwong RC, Brown JJ. Phosphorescent OLEDs for displays and lighting. Proceedings, IMDC, 2007.
Weaver MS, Tung YJ, D’Andrade B, Esler J, Brown JJ, Lin C, Mackenzie PB, Walters RW, Tsai JY, Brown CS, Forrest SR, Thompson ME. Invited paper, Advances in blue phosphorescent organic light-emitting devices. Proceedings, SID, Vol. 37, pp. 127–130, 2006.
Canzler TW, Burghart M, Murano S, Blochwitz-Nimoth J, D’Andrade B, Hack M, Brown JJ. Highly power efficient organic light-emitting devices enabled by phosphorescent and p-i-n technologies. Proceedings, SPIE, Vol. 6333, pp. 633311, 2006.
D’Andrade BW, Brown JJ. Organic light-emitting device luminaire for illumination applications. Appl Phys Lett 2006; 88(19):192908.
D’Andrade B, Alleyne B, Hack M, Hewitt R, Brown JJ. White phosphorescent organic light emitting devices for lighting applications. Proceedings, SPIE, Vol. 6333, pp. 63330, 2006.
D’Andrade B, Brown JJ. White phosphorescent organic light emitting devices for display applications. Proceedings, SPIE, Vol. 6225, pp. 622514, 2006.
D’Andrade BW, Esler J, Brown JJ. Organic light-emitting device operational stability at cryogenic temperatures. Synth Met 2006; 156(5–6):405–408.
D’Andrade BW, Datta S, Forrest SR, Djurovich P, Polikarpov E, Thompson ME. Relationship between the ionization and oxidation potentials of molecular organic semiconductors. Org Electron 2005; 6(1):11–20.
Holmes RJ, Forrest SR, Sajoto T, Tamayo A, Djurovich PI, Thompson ME, Brooks J, Tung YJ, D’Andrade BW, Weaver MS, Kwong RC, Brown JJ. Saturated deep blue organic electrophosphorescence using a fluorine-free emitter. Appl Phys Lett 2005; 87(24):243507.
D’Andrade B, Adamovich V, Hewitt R, Hack M, Brown JJ. Phosphorescent organic light-emitting devices for solid-state lighting. Proceedings, SPIE, Vol. 5937, pp. 1–7, 2005.
D’Andrade B, Holmes R, Forrest S, Li J, Thompson M. Triple-doped white organic light-emitting devices grown in vacuum. Proceedings, SPIE, Vol. 5530, pp. 17–25, 2004.
D’Andrade BW, Forrest SR. White organic light-emitting devices for solid-state lighting. Adv Mater 2004; 16(18):1585–1595.
D’Andrade BW, Holmes RJ, Forrest SR. Efficient organic electrophosphorescent white-light-emitting device with a triple doped emissive layer. Adv Mater 2004; 16(7):624–628, 2004.
Brooks JJ, Kwong RC, Tung Y-J, Weaver MS, D’Andrade B, Adamovich V, Thompson ME, Forrest SR, Brown JJ. Comparison of blue-emitting phosphorescent dopants: Effect of molecular energy levels on device efficiency. Proceedings, SPIE, Vol. 5519, pp. 35–41, 2004.
D’Andrade B, Forrest SR. Effects of exciton and charge confinement on the performance of white organic p-i-n electrophosphorescent emissive excimer devices. J Appl Phys 2003; 94(5):3101–3109.
D’Andrade BW, Forrest SR, Chwang AB. Operational stability of electrophosphorescent devices containing p and n doped transport layers. Appl Phys Lett 2003; 83(19):3858–3860.
D’Andrade B, Forrest SR. Formation of triplet excimers and dimers in amorphous organic thin films and light emitting devices. Chem Phys 2003; 286(2–3):321–335.
Adamovich VI, Cordero SR, Djurovich PI, Tamayo A, Thompson ME, D’Andrade BW, Forrest SR. New charge-carrier blocking materials for high efficiency OLEDs. Org Electron 2003; 4(2–3):77–87.
Holmes RJ, D’Andrade BW, Forrest SR, Ren X, Li J, Thompson ME. Efficient, deep-blue organic electrophosphorescence by guest charge trapping. Appl Phys Lett 2003; 83(18):3818–3820.
D’Andrade BW, Thompson ME, Forrest SR. Controlling exciton diffusion in multilayer white phosphorescent organic light emitting devices. Adv Mater 2002; 14(2):147–151.
D’Andrade BW, Brooks J, Adamovich V, Thompson ME, Forrest SR. White light emission using triplet excimers in electrophosphorescent organic light-emitting devices. Adv Mater 2002; 14(15):1032–1036.
Adamovich V, Brooks J, Tamayo A, Alexander AM, Djurovich PI, D’Andrade BW, Adachi C, Forrest SR, Thompson ME. High efficiency single dopant white electrophosphorescent light emitting diodes. New J Chem 2002; 26(9):1171–1178.
D’Andrade BW, Baldo MA, Adachi C, Brooks J, Thompson ME, Forrest SR. High-efficiency yellow double-doped organic light-emitting devices based on phosphor-sensitized fluorescence. Appl Phys Lett 2001; 79(7):1045–1047.
Klauk H, D’Andrade B, Jackson TN. All-organic integrated emissive pixels. Annual Device Research Conference Digest 1999; 162–163.