Time-Resolved Response of Polymer Bulk-Heterojunction Photodetectors

Author

Salamandra, Luigi ; Susanna, Gianpaolo ; Penna, Stefano ; Brunetti, Francesca ; Reale, Andrea

Author_Institution

Dept. of Electron. Eng., Univ. of Rome Tor Vergata, Rome, Italy

Volume

23

Issue

12

fYear

2011

fDate

6/15/2011 12:00:00 AM

Firstpage

780

Lastpage

782

Abstract

We have fabricated a polymer bulk-heterojunction photodetector from a (1:0.7) blend solution of poly(3-hexyl-thiophene) (P3HT) and 1-(3-methoxy-carbonyl)propyl-1-phenyl-(6, 6)C-61 (PCBM) in o-dichlorobenzene. Absorption spectrum, external quantum efficiency and current-voltage (I-V) curves, both in dark condition and under illumination of a narrowband green light-emitting diode (green-LED) with λ_em,peak center at 525 nm, were measured to characterize the photodiode behavior. Moreover, the time-resolved response under the green-LED stimulus modulated at 200 KHz has been measured. This result suggests the application of our device as organic photodetector for all-organic optical data link in low-cost plastic-optical-fiber-based systems.

Keywords

light emitting diodes; optical fibre fabrication; optical polymers; photodetectors; photodiodes; time resolved spectra; 1-(3-methoxy-carbonyl)propyl-1-phenyl-(6, 6)C-61; P3HT; PCBM; absorption spectrum; all-organic optical data link; blend solution; current-voltage curves; external quantum efficiency; frequency 200 kHz; low-cost plastic-optical-fiber; narrowband green light-emitting diode; o-dichlorobenzene; organic photodetector; photodiode behavior; poly(3-hexyl-thiophene); polymer bulk-heterojunction photodetectors; time-resolved response; Frequency modulation; Optical device fabrication; Optical fiber communication; Optical fibers; Optical imaging; Optical modulation; Polymers; Bulk-heterojunction (BHJ); optical data link; organic photodetector (OPD);

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2011.2124451

Filename

5727909