TY - JOUR
T1 - Carrier density and quantum efficiency measurements in conjugated polymers
T2 - The Asia-Pacific Symposium on Organic Electroluminescent Materials and Devices
AU - Moses, Daniel
AU - Dogariu, Arthur
AU - Heeger, Alan J.
N1 - Funding Information:
We are grateful to Prof E.W. Van Stryland and Dr D. McBranch for providing us with AgGaSe 2 crystals, and to Jian Wang for assistance with sample preparation. Dr D. McBranch pointed out the importance of the different time scales observed for carrier decay and exciton decay. This research was supported by the Air Force Office of Scientific Research (Charles Lee, Program Officer) under F49620-99-1-0031.
PY - 2000/3/1
Y1 - 2000/3/1
N2 - Ultrafast measurements of transient excited-state absorption in the spectral region spanning the infrared active vibrational active (IRAV) modes in the prototypical luminescent polymers, poly(phenylene vinylene), PPV, and poly[2-methoxy-5-(2-ethyl-hexyloxy)-(phenylene-vinylene)], MEH-PPV, reveal charge carrier generation within 100 fs after photoexcitation. The relatively large photocarrier quantum efficiency in MEH-PPV, φ0≈0.1 in zero applied electric field, implies primary photogeneration of charge carriers. Comparison of the recombination dynamics in MEH-PPV and PPV indicates that the carrier recombination rate is sensitive to the strength of the inter-chain interaction.
AB - Ultrafast measurements of transient excited-state absorption in the spectral region spanning the infrared active vibrational active (IRAV) modes in the prototypical luminescent polymers, poly(phenylene vinylene), PPV, and poly[2-methoxy-5-(2-ethyl-hexyloxy)-(phenylene-vinylene)], MEH-PPV, reveal charge carrier generation within 100 fs after photoexcitation. The relatively large photocarrier quantum efficiency in MEH-PPV, φ0≈0.1 in zero applied electric field, implies primary photogeneration of charge carriers. Comparison of the recombination dynamics in MEH-PPV and PPV indicates that the carrier recombination rate is sensitive to the strength of the inter-chain interaction.
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U2 - 10.1016/S0040-6090(99)00993-1
DO - 10.1016/S0040-6090(99)00993-1
M3 - Conference article
AN - SCOPUS:0033895046
SN - 0040-6090
VL - 363
SP - 68
EP - 71
JO - Thin Solid Films
JF - Thin Solid Films
IS - 1
Y2 - 8 June 1999 through 11 June 1999
ER -