A near infrared organic photodiode with gain at low bias voltage

Journal Article · Thu Jan 01 00:00:00 EST 2009 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.3279133· OSTI ID:972052

Campbell, Ian H ^[1]; Crone, Brian K ^[1]

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1. Los Alamos National Laboratory

We demonstrate an organic photodiode with near infrared optical response out to about 1100 run with a gain of {approx}10 at 1000 run under 5V reverse bias. The diodes employ a soluble naphthalocyanine with a peak absorption coefficient of {approx}10{sup 5} cm{sup -1} at 1000 nm. In contrast to most organic photodiodes, no exciton dissociating material is used. At zero bias, the diodes are inefficient with an external quantum efficiency of {approx} 10{sup -2}. In reverse bias, large gain occurs and is linear with bias voltage above 4V. The observed gain is consistent with a photoconductive gain mechanism.

• Research Organization: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC52-06NA25396
• OSTI ID: 972052
• Report Number(s): LA-UR-09-06513; LA-UR-09-6513; APPLAB; TRN: US201005%%154
• Journal Information: Applied Physics Letters, Journal Name: Applied Physics Letters; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ABSORPTION
EXCITONS
PHOTODIODES
QUANTUM EFFICIENCY