Transparent organic photodiodes with high quantum efficiency

摘要

We demonstrate organic photodiodes with a transparency of u000480% throughout the visible spectrumnand with up to u000480% external quantum efficiency u0002EQEu0003 in the near infrared under reverse bias.nThe diodes use thin films of soluble naphthalocyanine u0002Ncu0003 molecules prepared by spin casting, withnor without thermal annealing. Annealing of the naphthalocyanine layer preferentially orients thenplanar Nc molecules parallel to the substrate surface. Annealed diodes have improved EQE at zeronbias and photoconductive gain at small reverse bias. © 2010 American Institute of Physics.nu0005doi:10.1063/1.3464967