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Organometallic Luminescence - 1st Edition - ISBN: 9780128206324, 9780128209301

Organometallic Luminescence

1st Edition

A Case Study on Alq3, an OLED Reference Material

Author: Giuseppe Baldacchini
eBook ISBN: 9780128209301
Paperback ISBN: 9780128206324
Imprint: Woodhead Publishing
Published Date: 26th October 2020
Page Count: 352
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Table of Contents

  1. Introduction to the Properties of Alq3
    1.1. Optical Properties of Organic Molecules
    1.2. Organic Molecules and Optoelectronics Applications
    1.3. Chemical and Physical Properties of the Alq3 Molecule
    1.4. Preliminary Experiments on Random Alq3 Films
    1.5. Optical Properties on Planned Alq3 Thin Films
  2. Experimental Methods in Alq3 Thin Films Research
    2.1. Samples Preparation, Characterization and Storage
    2.2. Mechanical and Optical Properties
    2.3. Transmission and Absorption Spectra
    2.4. Emission Spectra

  3. Optical Absorption of Alq3 Thin Films
    3.1. Absorption Spectra and Annealin
    3.2. Absorption Spectra and Time Evolution

  4. Experimental Emission of Alq3 Thin Films
    4.1. Emission Spectra During Annealing
    4.2. Emission Spectra During Decay
    4.3. More on Emission Spectra During Decay
    4.4. Emission versus Absorption and Summing Up

  5. Emission Phenomenology up to 10,000 Hours
    5.1. Emission Decay Behavior up to 10,000 Hours
    5.2. Four Components Model and Emission Intensity up to 10,000 Hours
    5.3. Four Components Model and Emission Bands
    5.4. Four Emission Bands
    5.5. Peak Wavelength and Linewidth of the Emission Bands

  6. New Morphology and Phase Transition
    6.1. Emission Band During Annealing
    6.2. Thermally Activated Process and Phase Transition
    6.3. Four Components Model and Emission Band Lineshape
    6.4. Four Components Model and Emission Band Intensity
    6.5. Four Components Model and Structure of Films

  7. Emission Spectra up to 50,000 Hours
    7.1. Emission Spectra and Time Evolution up to 50,000 Hours
    7.2. Four Components Model and Emission Intensity up to 50,000 Hours
    7.3. Singular Behavior of Sample alq64-1

  8. Emission up to 50,000 HHHours and Stretching
    8.1. Emission Intensity and Stretched Exponentials
    8.2. Stretching and Sample alq64-1
    8.3. Photoluminescence Data and Their Experimental Consistency
    8.4. Experimental Data and Four Components Model Theory

  9. Zero and First Order Kinetics
    9.1. Kinetic Approach and Preliminary Analysis
    9.2. Experimental and Kinetic Approach
    9.3. Analysis of the Kinetic Approach
    9.4. Effects of the 0th Order Constant on Photoluminescence

  10. Discussion
    10.1. Preliminary Optical Studies
    10.2. Photoluminescence and Four Components Model
    10.3. Surface Molecules of Component 1
    10.4. Stretched Four Components Model, 0th & 1st Order Kinetics, and Free Radicals
    10.5. Number of Alq3 Molecules and Free Radicals
    10.6. 0th & 1st Order Kinetics at a Glance and Annealing
    10.7. Usefulness, Limitations and Shortcomings of Absorption Measurements
    10.8. Comparison with Literature

  11. Conclusions

Appendix A: Simulation and Statistical Parameters

Appendix B: Cartesian Representations and One and Two Exponential Functions

Appendix C: A New Absorption Analysis


Organometallic Luminescence: A Case Study of Alq3, an OLED Reference Material contains many discoveries on Alq3, an important organometallic material to the optoelectronics community that includes insights that can be applied to other organic compounds. The book contains groundbreaking research from the author’s own investigation into the Alq3 material that is based on years of experiments, the results of which initially escaped any logical explanation. The book describes a simple method based on photoluminescence to observe optical properties in Alq3, also covering the optical properties of absorption and long decay from theoretical and experimental perspectives.

Key Features

  • Considers both theoretical and experimental measurements and an analysis of the optical properties of a key OLED reference material
  • Includes detailed experimental data and a large number of tables and figures
  • Describes and applies the photoluminescence method of considering the optical properties of Alq3 that can be applied to other optoelectronics materials


Early career and advanced researchers focused on the theoretical and experimental aspects of optoelectronics research


No. of pages:
© Woodhead Publishing 2020
26th October 2020
Woodhead Publishing
eBook ISBN:
Paperback ISBN:


"This book is a unique reference book on Alq3 materials. It includes lists of references for further study and loads of graphical data showing the properties obtained for Alq3 under various conditions. Those readers interested in OLED materials, specifically Alq3 OLED materials, would enjoy this book. " --IEEE

Ratings and Reviews

About the Author

Giuseppe Baldacchini

Dr. Giuseppe Baldacchini is a retired researcher formerly affiliated with the Research Center of ENEA at Frascati. His research activities were predominantly based at ENEA, Universities of Berkeley and Salt Lake City. He holds multiple patents and has authored several scientific papers in EPR, NMR, cryogenics, magneto-optics, color centers, solid state, molecular spectroscopy, optoelectronics and luminous processes. He is also involved with historical, archeological, humanistic, and medical studies.

Affiliations and Expertise

Formerly Researcher, Research Center of ENEA, Frascati