Indication of current-injection lasing from an organic semiconductor

In this study, we investigate the lasing properties of 4,4'-bis[(N-carbazole)styryl]biphenyl thin films under electrical pumping. The electroluminescent devices incorporate a mixed-order distributed feedback SiO2 grating into an organic light-emitting diode structure and emit blue lasing. The results provide an indication of lasing by direct injection of current into an organic thin film through selection of a high-gain organic semiconductor showing clear separation of the lasing wavelength from significant triplet and polaron absorption and design of a proper feedback structure with low losses at high current densities. This study represents an important advance toward a future organic laser diode technology.

[1]  Richard H. Friend,et al.  Pulsed excitation of low-mobility light-emitting diodes: Implication for organic lasers , 1999 .

[2]  R. Capelli,et al.  Organic light-emitting transistors with an efficiency that outperforms the equivalent light-emitting diodes. , 2010, Nature materials.

[3]  Atula S. D. Sandanayaka,et al.  Quasi‐Continuous‐Wave Organic Thin‐Film Distributed Feedback Laser , 2016 .

[4]  Yue Wang,et al.  Nanoimprinted Organic Semiconductor Laser Pumped by a Light‐Emitting Diode , 2013, Advanced materials.

[5]  Franky So,et al.  A systematic study on efficiency enhancements in phosphorescent green, red and blue microcavity organic light emitting devices , 2013, Light: Science & Applications.

[6]  Thomas Lampe,et al.  Understanding and predicting the orientation of heteroleptic phosphors in organic light-emitting materials. , 2016, Nature materials.

[7]  M. Gather,et al.  Organic Lasers: Recent Developments on Materials, Device Geometries, and Fabrication Techniques. , 2016, Chemical reviews.

[8]  Hidetoshi Yamamoto,et al.  100% fluorescence efficiency of 4,4′-bis[(N-carbazole)styryl]biphenyl in a solid film and the very low amplified spontaneous emission threshold , 2005 .

[9]  E. Namdas,et al.  Nano-alignment in semiconducting polymer films : a path to achieve high current density and brightness in organic light emitting transistors. , 2018 .

[10]  Chihaya Adachi,et al.  High current density in light-emitting transistors of organic single crystals. , 2008, Physical review letters.

[11]  Sebastien Forget,et al.  Recent advances in solid-state organic lasers , 2011, 1111.5688.

[12]  Stephen R. Forrest,et al.  Prospects for electrically pumped organic lasers , 2002 .

[13]  E. Namdas,et al.  How to recognize lasing , 2009 .

[14]  T. Matsushima,et al.  Improvement of the quasi-continuous-wave lasing properties in organic semiconductor lasers using oxygen as triplet quencher , 2016 .

[15]  Chihaya Adachi,et al.  Suppression of roll-off characteristics of organic light-emitting diodes by narrowing current injection/transport area to 50 nm , 2015 .

[16]  D. Bradley,et al.  Improved organic semiconductor lasers based on a mixed-order distributed feedback resonator design , 2007 .

[17]  J. Nunzi,et al.  Tunable circularly polarized lasing emission in reflection distributed feedback dye lasers. , 2008, Optics express.

[18]  A. Heeger,et al.  Control of Efficiency, Brightness, and Recombination Zone in Light‐Emitting Field Effect Transistors , 2012, Advanced materials.

[19]  S. Hotta,et al.  Current‐Confinement Structure and Extremely High Current Density in Organic Light‐Emitting Transistors , 2012, Advanced materials.

[20]  T. Matsushima,et al.  Toward continuous-wave operation of organic semiconductor lasers , 2017, Science Advances.

[21]  H. Sirringhaus,et al.  Highly Efficient Single‐Layer Polymer Ambipolar Light‐Emitting Field‐Effect Transistors , 2012, Advanced materials.

[22]  Daniel Moses,et al.  Low Thresholds in Polymer Lasers on Conductive Substrates by Distributed Feedback Nanoimprinting: Progress Toward Electrically Pumped Plastic Lasers , 2009 .

[23]  Wenping Hu,et al.  Organic Semiconductor Single Crystals for Electronics and Photonics , 2018, Advanced materials.

[24]  M. Muccini.  A bright future for organic field-effect transistors , 2006, Nature materials.

[25]  Ifor D. W. Samuel,et al.  Organic semiconductor lasers. , 2007 .

[26]  Chihaya Adachi,et al.  Suppression of exciton annihilation at high current densities in organic light-emitting diode resulting from energy-level alignments of carrier transport layers , 2008 .

[27]  C. Adachi,et al.  Highly efficient organic light-emitting diodes by delayed fluorescence , 2013 .

[28]  Christof Pflumm,et al.  The influence of annihilation processes on the threshold current density of organic laser diodes , 2007 .