Results 21 to 28 of about 30 (28)

Self‐Heating in Light‐Emitting Electrochemical Cells

Advanced Functional Materials, Volume 30, Issue 33, August 12, 2020., 2020
A systematic study of self‐heating in light‐emitting electrochemical cells (LECs) is presented. It shows that the LEC performance is significantly affected by the operating temperature and that this self‐heating can be alleviated by a rational design of the device structure.
Joan Ràfols‐Ribé, Nathaniel D. Robinson, Christian Larsen, Shi Tang, Michiel Top, Andreas Sandström, Ludvig Edman   +6 more
wiley   +1 more source

Capping Ligand Engineering of Cadmium‐Free AIZS Quantum Dots Toward Bright Electroluminescent Light‐Emitting Diodes by All‐Solution Process

Advanced Materials Interfaces, Volume 11, Issue 31, November 5, 2024.
Short‐chain 1‐octanethiol is employed for cadmium‐free AgInZnS quantum dots (AIZS QDs) as capping ligand, which enhanced PLQY, improved film‐forming ability, and increased conductivity of the resultant QDs. As a result, the QD based electroluminescent LEDs demonstrated enhanced luminance and current efficiency, reaching 515 cd m−2 and 0.4 cd A−1 ...
Yongfeng Liu, Xinyi Wang, Zhaoju Gao, Wenbin Yu, Jinpeng Yang, Feng Xu, Wei Pei, Jia Wang, Min Zhou   +8 more
wiley   +1 more source

Efficiency Roll‐Off in Light‐Emitting Electrochemical Cells

Advanced Materials, Volume 36, Issue 15, April 11, 2024.
The dynamic doping operation of light‐emitting electrochemical cells (LECs) renders the understanding of the efficiency roll‐off challenging. Herein, a method for quantification of major LEC loss factors, notably the outcoupling efficiency and exciton quenching, is presented.
Xiaoying Zhang, Joan Ràfols‐Ribé, Jonas Mindemark, Shi Tang, Mattias Lindh, Eduardo Gracia‐Espino, Christian Larsen, Ludvig Edman   +7 more
wiley   +1 more source

Mild and Efficient Extraction of Fluorescent Chlorophyll a from Spinach Leaves for Application as the Sustainable Emitter in Light‐Emitting Electrochemical Cells

ChemElectroChem, Volume 11, Issue 5, March 1, 2024.
A rapid and scalable extraction and isolation method of chlorophyll a from spinach was developed. The isolated pigment was used to fabricate a light‐emitting electrochemical cell (LEC) based on chlorophyll a as the guest‐emitter dispersed in a blend‐host matrix in a concentration of 2.5 or 5 mass%. The 2.5‐mass% LEC exhibited combined red:blue emission
Krzysztof Kotewicz, Shi Tang, Ludvig Edman, Ergang Wang   +3 more
wiley   +1 more source

Hydrophilic Conjugated Polymers for Sustainable Fabrication of Deep‐Red Light‐Emitting Electrochemical Cells

Advanced Materials Technologies, Volume 9, Issue 3, February 5, 2024.
Two cost‐efficient and hydrophilic conjugated polymers with oligo(ethylene glycol) side chains, TQ‐OEG and TQ2F‐OEG, are synthesized. They are used as emitters in light‐emitting electrochemical cells processed from a water:ethanol solvent mixture. The optimized device delivers an emission peak at 670 nm with a radiance of 185 µW m−2 at 2.3 V, thus ...
Tadele T. Filate, Shi Tang, Zewdneh Genene, Ludvig Edman, Wendimagegn Mammo, Ergang Wang   +5 more
wiley   +1 more source

Biomaterial-based random lasers achieved from peanut kernel doped with birch leaf-derived carbon dots. [PDF]

Nanophotonics
Huang Z, Opoku H, Liu J, Wu Z, Ren J, Zhang W, Wang J.   +6 more
europepmc   +1 more source

White light-emitting electrochemical cells based on metal-free TADF emitters. [PDF]

Nat Commun
Tang S, Tsuchiya Y, Wang J, Adachi C, Edman L.   +4 more
europepmc   +1 more source

Synchronized Photoluminescence and Electrical Mobility Enhancement in 2D WS₂ through Sequence-Specific Chemical Passivation. [PDF]

J Am Chem Soc
Li Z, Nameirakpam H, Berggren E, Noumbe U, Kimura T, Asakura E, Gray V, Thakur D, Edvinsson T, Lindblad A, Kohda M, Araujo RB, Rao A, Kamalakar MV.   +13 more
europepmc   +1 more source