TY  - THES
A1  - Bunzmann, Nikolai Eberhard
T1  - Excited State Pathways in 3rd Generation Organic Light-Emitting Diodes
T1  - Pfade angeregter Zustände in Organischen Leuchtdioden dritter Generation
N2  - This work revealed spin states that are involved in the light generation of organic light-emitting diodes (OLEDs) that are based on thermally activated delayed fluorescence (TADF). First, several donor:acceptor-based TADF systems forming exciplex states were investigated. Afterwards, a TADF emitter that shows intramolecular charge transfer states but also forms exciplex states with a proper donor molecule was studied. The primary experimental technique was electron paramagnetic resonance (EPR), in particular the advanced methods electroluminescence detected magnetic resonance (ELDMR), photoluminescence detected magnetic resonance (PLDMR) and electrically detected magnetic resonance (EDMR). Additional information was gathered from time-resolved and continuous wave photoluminescence measurements.
N2  - In dieser Arbeit wurden Spinzustände identifiziert, die an der Lichterzeugung von organischen Leuchtdioden beteiligt sind, welche auf thermisch aktivierter verzögerter Fluoreszenz (engl. TADF) basieren. Zuerst wurden mehrere Donor:Akzeptor basierte TADF Systeme untersucht. Danach wurde ein TADF Emitter studiert, welcher intramolekulare Ladungstransfer Zustände (engl. CT states) zeigt, aber auch Exziplex Zustände mit einem geeigneten Donor Molekül bildet. In erster Linie wurde die experimentelle Methode der Elektronenspinresonanz (ESR) genutzt, insbesondere die erweiterten Techniken Elektrolumineszenz detektierte Magnetresonanz (ELDMR), Photolumineszenz detektierte Magnetresonanz (PLDMR) und elektrisch detektierte Magnetresonanz (EDMR). Zusätzliche Informationen wurden aus zeitaufgelösten und dauerstrich Photolumineszenz Messungen gewonnen.
KW  - Elektronenspinresonanz
KW  - Technische Optik
KW  - Nanometerbereich
KW  - OLEDs
Y1  - 2021
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-220786
ER  - 
TY  - JOUR
A1  - Huang, Zhenguo
A1  - Wang, Suning
A1  - Dewhurst, Rian D.
A1  - Ignat'ev, Nikolai V.
A1  - Finze, Maik
A1  - Braunschweig, Holger
T1  - Boron: Its Role in Energy‐Related Processes and Applications
JF  - Angewandte Chemie International Edition
N2  - Boron's unique position in the Periodic Table, that is, at the apex of the line separating metals and nonmetals, makes it highly versatile in chemical reactions and applications. Contemporary demand for renewable and clean energy as well as energy‐efficient products has seen boron playing key roles in energy‐related research, such as 1) activating and synthesizing energy‐rich small molecules, 2) storing chemical and electrical energy, and 3) converting electrical energy into light. These applications are fundamentally associated with boron's unique characteristics, such as its electron‐deficiency and the availability of an unoccupied p orbital, which allow the formation of a myriad of compounds with a wide range of chemical and physical properties. For example, boron's ability to achieve a full octet of electrons with four covalent bonds and a negative charge has led to the synthesis of a wide variety of borate anions of high chemical and electrochemical stability—in particular, weakly coordinating anions. This Review summarizes recent advances in the study of boron compounds for energy‐related processes and applications.
KW  - boron
KW  - electrolytes
KW  - hydrogen
KW  - OLEDs
KW  - small-molecule activation
Y1  - 2020
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-218514
VL  - 59
IS  - 23
SP  - 8800
EP  - 8816
ER  -