Photoluminescence of PPV (poly(p-phenylene vinylene)) layers under steady state and pulsed excitation

Waclaw Bala; L. Kreja; Zbigniew Lukasiak; P. Czarnowski; P. Dalasinski

doi:10.1117/12.519742

22 October 2003 Photoluminescence of PPV (poly(p-phenylene vinylene)) layers under steady state and pulsed excitation

Waclaw Bala, L. Kreja, Zbigniew Lukasiak, P. Czarnowski, P. Dalasinski

Proceedings Volume 5136, Solid State Crystals 2002: Crystalline Materials for Optoelectronics; (2003) https://doi.org/10.1117/12.519742
Event: 2003 Chapter books, 2003, Bellingham, WA, United States

Abstract

We have studied the temperature dependence (10K-325K) of the photoluminescence emission spectra (PL) under pulsed and continuous excitation and photoluminescence excitation spectra (PLE) under steady-state conditions of PPV (poly(p-phenylene vinylene)) layers fabricated by spin-coated deposition onto comercial indium tin oxide (ITO) coated glass and other substrates. The PPV organic polymer has an optical energy band gap about 2.5 eV and exhibits strong luminescence at all mentioned range of temperature and for different energy of excitation. PLE is wide and structureless in comparison to PL. PL spectra of PPV samples contain few peaks of vibronic origin in visible region. Position of peaks on energy scale depends on the temperature. We have observed red-shift of peaks with decreasing the temperature that results from changing of conjugation lengths in PPV molecular structure connected mainly with tensions between PPV layer and substrate.

Citation Download Citation

Waclaw Bala, L. Kreja, Zbigniew Lukasiak, P. Czarnowski, and P. Dalasinski "Photoluminescence of PPV (poly(p-phenylene vinylene)) layers under steady state and pulsed excitation", Proc. SPIE 5136, Solid State Crystals 2002: Crystalline Materials for Optoelectronics, (22 October 2003); https://doi.org/10.1117/12.519742

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