scholarly journals Lasing of Tamm states in highly efficient organic devices based on small-molecule organic semiconductors

2014 ◽  
Vol 174 ◽  
pp. 183-201 ◽  
Author(s):  
R. Brückner ◽  
V. G. Lyssenko ◽  
S. Hofmann ◽  
K. Leo
Keyword(s):  
Organic Semiconductors ◽  
Organic Light Emitting Diodes ◽  
Lasing Threshold ◽  
Metal Contacts ◽  
Light Emitting ◽  
Organic Light ◽  
Cavity Modes ◽  
Light Loss ◽  
Plasmon Polariton ◽  
Organic Devices

We discuss approaches to increase the light outcoupling efficiency in organic microcavity (MC) lasers and organic light-emitting diodes (OLEDs). We find that the introduction of metals into the cavities leads to additional Tamm-plasmon polariton modes, while the corrugation of metal contacts, such as perforated μ-size holes or a periodic array of metal stripes, leads to 2D confinement of the cavity modes, which in turn reduces the lasing threshold in MCs. Furthermore, we elucidate light loss mechanisms in OLEDs and reveal how external dielectric layers and periodic gratings can be used to enhance outcoupling from the OLED cavity.

Acene-based organic semiconductors for organic light-emitting diodes and perovskite solar cells

2018 ◽  
Vol 6 (33) ◽  
pp. 9017-9029 ◽  
Author(s):  
Hong Duc Pham ◽  
Hongwei Hu ◽  
Fu-Lung Wong ◽  
Chun-Sing Lee ◽  
Wen-Cheng Chen ◽  
...  
Keyword(s):  
Solar Cells ◽  
Small Molecules ◽  
Organic Semiconductors ◽  
Light Emitting Diodes ◽  
Perovskite Solar Cells ◽  
Organic Light Emitting Diodes ◽  
Strong Electron ◽  
Light Emitting ◽  
Organic Light

A series of strong electron-rich small molecules based on acenes were designed and synthesized for application in green/blue organic light-emitting diodes and perovskite solar cells.

Use of silane-functionalized graphene oxide in organic photovoltaic cells and organic light-emitting diodes

2015 ◽  
Vol 17 (14) ◽  
pp. 9369-9374 ◽  
Author(s):  
Chang Yeong Lee ◽  
Quyet Van Le ◽  
Cheolmin Kim ◽  
Soo Young Kim
Keyword(s):  
Graphene Oxide ◽  
Interfacial Layer ◽  
Photovoltaic Cells ◽  
Organic Light Emitting Diodes ◽  
Organic Photovoltaic ◽  
Functionalized Graphene ◽  
Functionalized Graphene Oxide ◽  
Light Emitting ◽  
Organic Light ◽  
Organic Devices

The silane-functionalized graphene oxide could be used as an interfacial layer in organic devices.

scholarly journals Structural Geometry Variation of 1,4-Naphthalene-Based Co-Polymers to Tune the Device Performance of PVK-Host-Based OLEDs

Polymers ◽  
2021 ◽  
Vol 13 (17) ◽  
pp. 2914
Author(s):  
Qian Liu ◽  
Dhanashree Moghe ◽  
Gopa Sardar ◽  
Sergei Manzhos ◽  
Steven E. Bottle ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Organic Semiconductors ◽  
High Thermal Stability ◽  
Organic Light Emitting Diodes ◽  
Device Performance ◽  
Blue Color ◽  
Structural Geometry ◽  
Light Emitting ◽  
Organic Light ◽  
Coupling Polymerization

Blue-color-emitting organic semiconductors are of significance for organic light-emitting diodes (OLEDs). In this study, through Suzuki coupling polymerization, three 1,4-naphthalene-based copolymers—namely, PNP(1,4)-PT, PNP(1,4)-TF, and PNP(1,4)-ANT—were designed and synthesized. The variation of comonomers, phenothiazine (PT), triphenylamine substituted fluorene (TF), and anthanthrene (ANT), effectively tuned the emitting color and device performance of poly(9-vinyl carbazole) (PVK)-based OLEDs. Especially, the polymer PNP(1,4)-TF, bearing perpendicular aryl side groups, showed a most twisted structural geometry, which enabled an ultra-high thermal stability and a best performance with blue emitting in PVK-host-based OLEDs. Overall, in this work, we demonstrate a promising blue-color-emitting polymer through structural geometry manipulation.

scholarly journals Organic semiconductors for visible light communications

2020 ◽  
Vol 378 (2169) ◽  
pp. 20190186 ◽  
Author(s):  
Pavlos P. Manousiadis ◽  
Kou Yoshida ◽  
Graham A. Turnbull ◽  
Ifor D. W. Samuel
Keyword(s):  
Visible Light ◽  
Organic Semiconductors ◽  
Organic Solar Cells ◽  
Organic Light Emitting Diodes ◽  
Large Field ◽  
Visible Light Communications ◽  
Optical Wireless ◽  
Light Emitting ◽  
Flexible Films ◽  
Organic Light

Organic semiconductors are an important class of optoelectronic material that are widely studied because of the scope for tuning their properties by tuning their chemical structure, and simple fabrication to make flexible films and devices. Although most effort has focused on developing displays and lighting from these materials, their distinctive properties also make them of interest for visible light communications (VLCs). This article explains how their properties make them suitable for VLC and reviews the main uses that have been explored. On the transmitter side, record white VLC communication has been achieved by using organic semiconductors as colour converters, while direct modulation of organic light-emitting diodes is also possible and could be of interest for display-to-display communication. On the receiver side, organic solar cells can be used to harvest power and data simultaneously, and fluorescent antennas enable fast and sensitive receivers with large field of view. This article is part of the theme issue ‘Optical wireless communication’.

Organic Electronics: Successes in Organic Light Emitting Diodes and Display Technology

2012 ◽  
Vol 736 ◽  
pp. 241-249 ◽  
Author(s):  
Deepak
Keyword(s):  
Organic Semiconductors ◽  
Light Emitting Diodes ◽  
Single Crystal Silicon ◽  
Organic Light Emitting Diodes ◽  
Crystal Silicon ◽  
Active Matrix ◽  
Light Emitting ◽  
Organic Light ◽  
Active Matrix Displays ◽  
Display Technology

Whereas single crystal silicon limited to 300 mm in diameter dominates the bulk of electronic devices, when electronics is required on a larger scale we have to rely on either amorphous or multi-crystalline materials. In this category, the organic semiconductors have made rapid in-roads. Among their applications, most notable successes are organic light emitting diodes (OLEDs) based displays. But, these OLEDs could also be made to emit in ultraviolet (UV) as shown through polysilanes devices. Two materials that we have investigated emit in UV or near UV. The emission spectrum could be manipulated by modifying the side groups on the main Si chain. Further discussed in the paper are full colour passive matrix displays we have made and development of thin films transistor for moving towards active matrix displays.

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