Combinational Approach To Realize Highly Efficient Light-Emitting Electrochemical Cells

ACS Applied Materials & Interfaces
Rong-Huei YiHai-Ching Su

Abstract

Light-emitting electrochemical cells (LECs) show high technical potential for display and lighting utilizations owing to the superior properties of solution processability, low operation voltage, and employing inert cathodes. For maximizing the device efficiency, three approaches including development of efficient emissive materials, optimizing the carrier balance, and maximizing the light extraction have been reported. However, most reported works focused on only one of the three optimization approaches. In this work, a combinational approach is demonstrated to optimize the device efficiency of LECs. A sophisticatedly designed yellow complex exhibiting a superior steric hindrance and a good carrier balance is proposed as the emissive material of light-emitting electrochemical cells and thus the external quantum efficiency (EQE) is up to 13.6%. With an improved carrier balance and reduced self-quenching by employing the host-guest strategy, the device EQE can be enhanced to 16.9%. Finally, a diffusive layer embedded between the glass substrate and the indium-tin-oxide layer is utilized to scatter the light trapped in the layered device structure, and consequently, a high EQE of 23.7% can be obtained. Such an EQE is impressive a...Continue Reading

References

Jun 6, 2003·Journal of the American Chemical Society·Gregory KalyuzhnyAllen J Bard
Mar 5, 2004·Journal of the American Chemical Society·Jason D SlinkerGeorge G Malliaras
Aug 25, 1995·Science·Q PeiA J Heeger
Sep 24, 2008·Inorganic Chemistry·Henk J BolinkEnrique Ortí
Dec 6, 2008·Chemical Communications : Chem Comm·Zachary B HillGlenn P Bartholomew
Dec 22, 2010·Nano Letters·Amanda J Norell BaderJanelle M Leger
Dec 3, 2011·Physical Chemistry Chemical Physics : PCCP·Chih-Teng LiaoKen-Tsung Wong
Jun 12, 2012·Physical Chemistry Chemical Physics : PCCP·Chih-Teng LiaoKen-Tsung Wong
Aug 7, 2012·Journal of the American Chemical Society·Shi TangLudvig Edman
Aug 14, 2012·Angewandte Chemie·Rubén D CostaNicola Armaroli
Jan 29, 2014·ACS Applied Materials & Interfaces·Nikolai KaihovirtaLudvig Edman
Nov 6, 2014·ACS Applied Materials & Interfaces·Cristina Roldán-CarmonaHenk J Bolink
Nov 20, 2014·Dalton Transactions : an International Journal of Inorganic Chemistry·Hai-Ching Su, Jia-Hong Hsu
Aug 31, 2016·Topics in Current Chemistry·Shi Tang, Ludvig Edman
Nov 22, 2016·Advanced Materials·Dongxin MaLian Duan
Jun 29, 2018·ACS Applied Materials & Interfaces·Matthew D MooreJonathan L Sessler

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.