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High Peak Brightness Polymer Light‐Emitting Diodes
Author(s) -
Tessler Nir,
Harrison Nick T.,
Friend Richard H.
Publication year - 1998
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/(sici)1521-4095(199801)10:1<64::aid-adma64>3.0.co;2-g
Subject(s) - materials science , brightness , optoelectronics , light emitting diode , diode , current (fluid) , laser , current density , luminous efficacy , polymer , fabrication , optics , nanotechnology , composite material , layer (electronics) , electrical engineering , physics , medicine , alternative medicine , quantum mechanics , pathology , engineering
Laser action is currently limited by device efficiency , rather than peak current density, is one conclusion drawn from this investigation of optically pumped light‐emitting diodes (LEDs) made of conjugated polymers. The structure of the LEDs has been optimized to allow high current operation using short drive pulses. Unexpectedly high current densities and high luminous efficiencies at these current densities allow a high peak brightness of 5 × 10 6 cd/m 2 ; see also the cover of this issue. The implications of these results for the fabrication of injection lasers are discussed.