Low current density driving leads to efficient, bright and stable green electroluminescence

Research output: Contribution to journalArticlepeer-review

Standard

Low current density driving leads to efficient, bright and stable green electroluminescence. / Tordera, Daniel; Frey, Julien; Vonlanthen, David; Constable, Edwin; Pertegás, Antonio; Ortí, Enrique; Bolink, Henk J.; Baranoff, Etienne; Nazeeruddin, M. Khaja.

In: Advanced Energy Materials, Vol. 3, No. 10, 01.10.2013, p. 1338-1343.

Research output: Contribution to journalArticlepeer-review

Harvard

Tordera, D, Frey, J, Vonlanthen, D, Constable, E, Pertegás, A, Ortí, E, Bolink, HJ, Baranoff, E & Nazeeruddin, MK 2013, 'Low current density driving leads to efficient, bright and stable green electroluminescence', Advanced Energy Materials, vol. 3, no. 10, pp. 1338-1343. https://doi.org/10.1002/aenm.201300284

APA

Tordera, D., Frey, J., Vonlanthen, D., Constable, E., Pertegás, A., Ortí, E., Bolink, H. J., Baranoff, E., & Nazeeruddin, M. K. (2013). Low current density driving leads to efficient, bright and stable green electroluminescence. Advanced Energy Materials, 3(10), 1338-1343. https://doi.org/10.1002/aenm.201300284

Vancouver

Tordera D, Frey J, Vonlanthen D, Constable E, Pertegás A, Ortí E et al. Low current density driving leads to efficient, bright and stable green electroluminescence. Advanced Energy Materials. 2013 Oct 1;3(10):1338-1343. https://doi.org/10.1002/aenm.201300284

Author

Tordera, Daniel ; Frey, Julien ; Vonlanthen, David ; Constable, Edwin ; Pertegás, Antonio ; Ortí, Enrique ; Bolink, Henk J. ; Baranoff, Etienne ; Nazeeruddin, M. Khaja. / Low current density driving leads to efficient, bright and stable green electroluminescence. In: Advanced Energy Materials. 2013 ; Vol. 3, No. 10. pp. 1338-1343.

Bibtex

@article{911b6432d3f049518a50843d5f5b3842,
title = "Low current density driving leads to efficient, bright and stable green electroluminescence",
abstract = "Electroluminescent devices have the potential to reshape lighting and display technologies by providing low-energy consuming solutions with great aesthetic features, such as flexibility and transparency. In particular, light-emitting electrochemical cells (LECs) are among the simplest electroluminescent devices. The device operates with air-stable materials and the active layer can be resumed to an ionic phosphorescent emitter. As a consequence, LECs can be assembled using solution-process technologies, which could allow for low-cost and large-area lighting applications in the future. High efficiencies have been reported at rather low luminances (<50 cd m -2) and at very low current densities. Moreover, these efficiencies could be sustained for a brief moment only during operation time. Here, we demonstrate that a pulsed driving mode at low current densities leads to unequalled overall performances with excellent efficiencies throughout the lifetime of the device. The lifetime of the LECs is defined as the time it takes to reach 50% of the peak luminance. Upon optimization of various parameters (frequency, duty cycle and average current density), the green LEC reaches efficacies and power efficiencies of 28.2 cd A-1 and 17.1 lm W -1, respectively, at a luminance above 750 cd m-2 and 98 hours lifetime. The present work also rationalizes why high efficiencies have been obtained only at low current densities so far.",
keywords = "cationic iridium complex, electroluminescence, light-emitting electrochemical cells, pulsed driving, stable emission",
author = "Daniel Tordera and Julien Frey and David Vonlanthen and Edwin Constable and Antonio Perteg{\'a}s and Enrique Ort{\'i} and Bolink, {Henk J.} and Etienne Baranoff and Nazeeruddin, {M. Khaja}",
year = "2013",
month = oct,
day = "1",
doi = "10.1002/aenm.201300284",
language = "English",
volume = "3",
pages = "1338--1343",
journal = "Advanced Energy Materials",
issn = "1614-6832",
publisher = "Wiley-VCH Verlag",
number = "10",

}

RIS

TY - JOUR

T1 - Low current density driving leads to efficient, bright and stable green electroluminescence

AU - Tordera, Daniel

AU - Frey, Julien

AU - Vonlanthen, David

AU - Constable, Edwin

AU - Pertegás, Antonio

AU - Ortí, Enrique

AU - Bolink, Henk J.

AU - Baranoff, Etienne

AU - Nazeeruddin, M. Khaja

PY - 2013/10/1

Y1 - 2013/10/1

N2 - Electroluminescent devices have the potential to reshape lighting and display technologies by providing low-energy consuming solutions with great aesthetic features, such as flexibility and transparency. In particular, light-emitting electrochemical cells (LECs) are among the simplest electroluminescent devices. The device operates with air-stable materials and the active layer can be resumed to an ionic phosphorescent emitter. As a consequence, LECs can be assembled using solution-process technologies, which could allow for low-cost and large-area lighting applications in the future. High efficiencies have been reported at rather low luminances (<50 cd m -2) and at very low current densities. Moreover, these efficiencies could be sustained for a brief moment only during operation time. Here, we demonstrate that a pulsed driving mode at low current densities leads to unequalled overall performances with excellent efficiencies throughout the lifetime of the device. The lifetime of the LECs is defined as the time it takes to reach 50% of the peak luminance. Upon optimization of various parameters (frequency, duty cycle and average current density), the green LEC reaches efficacies and power efficiencies of 28.2 cd A-1 and 17.1 lm W -1, respectively, at a luminance above 750 cd m-2 and 98 hours lifetime. The present work also rationalizes why high efficiencies have been obtained only at low current densities so far.

AB - Electroluminescent devices have the potential to reshape lighting and display technologies by providing low-energy consuming solutions with great aesthetic features, such as flexibility and transparency. In particular, light-emitting electrochemical cells (LECs) are among the simplest electroluminescent devices. The device operates with air-stable materials and the active layer can be resumed to an ionic phosphorescent emitter. As a consequence, LECs can be assembled using solution-process technologies, which could allow for low-cost and large-area lighting applications in the future. High efficiencies have been reported at rather low luminances (<50 cd m -2) and at very low current densities. Moreover, these efficiencies could be sustained for a brief moment only during operation time. Here, we demonstrate that a pulsed driving mode at low current densities leads to unequalled overall performances with excellent efficiencies throughout the lifetime of the device. The lifetime of the LECs is defined as the time it takes to reach 50% of the peak luminance. Upon optimization of various parameters (frequency, duty cycle and average current density), the green LEC reaches efficacies and power efficiencies of 28.2 cd A-1 and 17.1 lm W -1, respectively, at a luminance above 750 cd m-2 and 98 hours lifetime. The present work also rationalizes why high efficiencies have been obtained only at low current densities so far.

KW - cationic iridium complex

KW - electroluminescence

KW - light-emitting electrochemical cells

KW - pulsed driving

KW - stable emission

UR - http://www.scopus.com/inward/record.url?scp=84886088831&partnerID=8YFLogxK

U2 - 10.1002/aenm.201300284

DO - 10.1002/aenm.201300284

M3 - Article

AN - SCOPUS:84886088831

VL - 3

SP - 1338

EP - 1343

JO - Advanced Energy Materials

JF - Advanced Energy Materials

SN - 1614-6832

IS - 10

ER -