Polymer Diode Structures: LEDs and PDs Basic diode characteristics: J V A: Dark response B: Light response J (mA/cm 2 ) (i) B A V (V) (i): Quadrant of interest for OLEDs (Dark) (ii): Quadrant of interest for Solar Cells (Light) (iii): Quadrant of interest for photodetectors (Light) (iii) (ii) • Polymer light emitting diodes under study for displays and lighting • Polymer photodiodes under study for: Solar energy conversion Photodetection: UV detectors; Fast detectors for data links; Optical scanners/imaging Direct competition with Si devices: Similar QE (~ 50%), responsivity (~ 0.3 A/W) and limit of detection (~ 10 -13 - 10 -14 W) but slower rise time (µs vs ns). Spectral selectivity without requirement for colour filters.
MV Fluidic Technology Platform Organic devices integrated on-chip: • Organic LEDs & Photodetectors: Discrete, array, variable size, selectable spectral characteristics • Simple, low-cost deposition procedures compatible with planar microfluidic chip structures: Coating and printing • Matched molecular light sources & photodetectors • Quantitative analysis at a throw-away cost Channel wall photodetector light Channel wall light pLED “Polymer Detection System” J.C. De Mello, A.J. De Mello, D.D.C. Bradley; UK Patent Application 0028482.8 (22/11/00); Granted as GB 2369428B; US 6,995,348; EP 1336089; JP 2002-544636; HK 1045190