TY - JOUR
T1 - Electrical and optical studies of the organic thin film devices produced by cluster beam deposition methods
AU - Kim, J. Y.
AU - Kim, E. S.
AU - Choi, J. H.
N1 - Funding Information:
We would like to thank Prof. J.I. Jin for providing the polymer samples. J.Y. Kim and E.S. Kim wish to acknowledge support of BK21 fellowships. This work was financially supported by the CRM-KOSEF (2001).
PY - 2001
Y1 - 2001
N2 - The neutral and ionized cluster beam deposition (NCBD and ICBD) methods have been applied to fabricate the new double-layer organic light emitting devices (OLEDs) with the structure of indium-tin-oxide (ITO)-coated glass/spin-coated poly[2-(N-carbazolyl)-5-(2-ethyl-hexyloxy)-1,4-phenylenevinylene] (CzEH-PPV)/8-hydroxyquinoline aluminum (Alq3)/Li:Al. The surface morphology profiles measured by atomic force microscopy (AFM) showed that the cluster beam deposition methods are efficient in producing uniform and smooth film surfaces. Photo- and electro-luminescence (PL, EL) spectroscopies demonstrated that while the new hole transporting medium CzEH-PPV is susceptible to the bombardment of energetic ionized beam, the introduction of the neutral buffer layer significantly improves the device characteristics, i.e., lower threshold and turn-on voltages and higher external quantum efficiency (EQE). In addition, the effect of doping of highly fluorescent dye (DCM) into Alq3 layer showed a complete energy transfer, color-tuning capability and higher EQE compared to the undoped devices.
AB - The neutral and ionized cluster beam deposition (NCBD and ICBD) methods have been applied to fabricate the new double-layer organic light emitting devices (OLEDs) with the structure of indium-tin-oxide (ITO)-coated glass/spin-coated poly[2-(N-carbazolyl)-5-(2-ethyl-hexyloxy)-1,4-phenylenevinylene] (CzEH-PPV)/8-hydroxyquinoline aluminum (Alq3)/Li:Al. The surface morphology profiles measured by atomic force microscopy (AFM) showed that the cluster beam deposition methods are efficient in producing uniform and smooth film surfaces. Photo- and electro-luminescence (PL, EL) spectroscopies demonstrated that while the new hole transporting medium CzEH-PPV is susceptible to the bombardment of energetic ionized beam, the introduction of the neutral buffer layer significantly improves the device characteristics, i.e., lower threshold and turn-on voltages and higher external quantum efficiency (EQE). In addition, the effect of doping of highly fluorescent dye (DCM) into Alq3 layer showed a complete energy transfer, color-tuning capability and higher EQE compared to the undoped devices.
UR - http://www.scopus.com/inward/record.url?scp=0035744575&partnerID=8YFLogxK
U2 - 10.1557/proc-667-g3.12
DO - 10.1557/proc-667-g3.12
M3 - Conference article
AN - SCOPUS:0035744575
VL - 667
SP - G3121-G3126
JO - Materials Research Society Symposium Proceedings
JF - Materials Research Society Symposium Proceedings
SN - 0272-9172
T2 - Luminescent and Lumiescent Materials
Y2 - 17 April 2001 through 19 April 2001
ER -