Synthesis and n‐Type Semiconducting Properties of Bis(dioxaborin) Compounds Containing a π‐Extended 2,2'‐Bithiophene Structure

AbstractQuasi-two-dimensional (quasi-2D) perovskites have attracted extraordinary attention due to their superior semiconducting properties and have emerged as one of the most promising materials for next-generation light-emitting diodes (LEDs). The outstanding optical properties originate from their structural characteristics. In particular, the inherent quantum-well structure endows them with a large exciton binding energy due to the strong dielectric- and quantum-confinement effects; the corresponding energy transfer among different n-value species thus results in high photoluminescence quantum yields (PLQYs), particularly at low excitation intensities. The review herein presents an overview of the inherent properties of quasi-2D perovskite materials, the corresponding energy transfer and spectral tunability methodologies for thin films, as well as their application in high-performance LEDs. We then summarize the challenges and potential research directions towards developing high-performance and stable quasi-2D PeLEDs. The review thus provides a systematic and timely summary for the community to deepen the understanding of quasi-2D perovskite materials and resulting LED devices.

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Thermal Activation Energy and Semiconducting Properties of Macromolecular Substances

Journal of Polymer Science Part C Polymer Symposia ◽

10.1002/polc.5070220226 ◽

2007 ◽

Vol 22 (2) ◽

pp. 867-879 ◽

Cited By ~ 2

Author(s):

Aleksander Szymański ◽

Marian Kryszewski

Keyword(s):

Activation Energy ◽

Thermal Activation ◽

Thermal Activation Energy ◽

Semiconducting Properties

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Synthesis and Theoretical Investigation Using DFT of 2,3-Diphenylquinoxaline Derivatives for Electronic and Photovoltaic Effects

Journal of Electronic Materials ◽

10.1007/s11664-021-09041-0 ◽

2021 ◽

Author(s):

Dorota Zając ◽

Dariusz Przybylski ◽

Jadwiga Sołoducho

Keyword(s):

Solar Cells ◽

Acrylic Acid ◽

Organic Semiconductors ◽

Organic Solar Cells ◽

Molecular Design ◽

Low Cost ◽

Design Synthesis ◽

Semiconducting Properties ◽

Homo Lumo

AbstractDeveloping effective and low‐cost organic semiconductors is an opportunity for the development of organic solar cells (OPV). Herein, we report the molecular design, synthesis and characterization of two molecules with D–A–D–A configuration: 2-cyano-3-(5-(8-(3,4-ethylenodioxythiophen-5-yl)-2,3-diphenylquinoxalin-5-yl)thiophen-2-yl)acrylic acid (6) and 2-cyano-3-(5-(2,3-diphenyl-8-(thiophen-2-yl)quinoxalin-5-yl)thiophen-2-yl)acrylic acid (7). Moreover, we investigated the structural, theoretical and optical properties. The distribution of HOMO/LUMO orbitals and the values of the ionization potential indicate good semiconducting properties of the compounds and that they can be a bipolar material. Also, the optical study show good absorption in visible light (λabs 380–550 nm). We investigate the theoretical optoelectronic properties of obtained compounds as potential materials for solar cells.

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