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Sökning: onr:"swepub:oai:DiVA.org:ri-71985" > Efficiency Roll-Off...

LIBRIS Formathandbok  (Information om MARC21)
FältnamnIndikatorerMetadata
00005742naa a2200685 4500
001oai:DiVA.org:ri-71985
003SwePub
008240222s2024 | |||||||||||000 ||eng|
009oai:DiVA.org:umu-220016
0247 a https://urn.kb.se/resolve?urn=urn:nbn:se:ri:diva-719852 URI
0247 a https://doi.org/10.1002/adma.2023101562 DOI
0247 a https://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-2200162 URI
040 a (SwePub)rid (SwePub)umu
041 a engb eng
042 9 SwePub
072 7a ref2 swepub-contenttype
072 7a art2 swepub-publicationtype
1001 a Zhang, Xiaoyingu Umeå universitet,Institutionen för fysik,Umeå University, Sweden4 aut0 (Swepub:umu)xizh0020
2451 0a Efficiency Roll-Off in Light-Emitting Electrochemical Cells
264 1b John Wiley and Sons Inc,c 2024
338 a electronic2 rdacarrier
500 a The authors wish to acknowledge generous financial support from the Swedish Research Council (2019‐02345 and 2021‐04778), the Swedish Energy Agency (50779‐1 and P2021‐00032), “Bertil och Britt Svenssons stiftelse för belysningsteknik,” Kempe Foundations, the Knut and Alice Wallenberg Foundation for a Proof of concept grant (KAW 2022.0381), the Wallenberg Initiative Materials Science for Sustainability (WISE) funded by the Knut and Alice Wallenberg Foundation (WISE‐AP01‐D02), and the European Research Council for an ERC Advanced Grant (project 101096650).
520 a Understanding “efficiency roll-off” (i.e., the drop in emission efficiency with increasing current) is critical if efficient and bright emissive technologies are to be rationally designed. Emerging light-emitting electrochemical cells (LECs) can be cost- and energy-efficiently fabricated by ambient-air printing by virtue of the in situ formation of a p-n junction doping structure. However, this in situ doping transformation renders a meaningful efficiency analysis challenging. Herein, a method for separation and quantification of major LEC loss factors, notably the outcoupling efficiency and exciton quenching, is presented. Specifically, the position of the emissive p-n junction in common singlet-exciton emitting LECs is measured to shift markedly with increasing current, and the influence of this shift on the outcoupling efficiency is quantified. It is further verified that the LEC-characteristic high electrochemical-doping concentration renders singlet-polaron quenching (SPQ) significant already at low drive current density, but also that SPQ increases super-linearly with increasing current, because of increasing polaron density in the p-n junction region. This results in that SPQ dominates singlet-singlet quenching for relevant current densities, and significantly contributes to the efficiency roll-off. This method for deciphering the LEC efficiency roll-off can contribute to a rational realization of all-printed LEC devices that are efficient at highluminance.
650 7a TEKNIK OCH TEKNOLOGIERx Materialteknik0 (SwePub)2052 hsv//swe
650 7a ENGINEERING AND TECHNOLOGYx Materials Engineering0 (SwePub)2052 hsv//eng
650 7a NATURVETENSKAPx Fysikx Atom- och molekylfysik och optik0 (SwePub)103022 hsv//swe
650 7a NATURAL SCIENCESx Physical Sciencesx Atom and Molecular Physics and Optics0 (SwePub)103022 hsv//eng
650 7a NATURVETENSKAPx Kemix Materialkemi0 (SwePub)104032 hsv//swe
650 7a NATURAL SCIENCESx Chemical Sciencesx Materials Chemistry0 (SwePub)104032 hsv//eng
653 a efficiency roll-off
653 a light-emitting electrochemical cell
653 a p-n junction position
653 a singlet-polaron quenching
653 a singlet-singlet quenching
653 a Electrochemical cells
653 a Excitons
653 a Light emission
653 a Polarons
653 a Semiconductor junctions
653 a 'current
653 a Emission efficiencies
653 a IS costs
653 a Out-coupling efficiency
653 a P-n junction
653 a Quenching
7001 a Ràfols-Ribé, Joanu Umeå universitet,Institutionen för fysik,Umeå University, Sweden4 aut0 (Swepub:umu)jorf0001
7001 a Mindemark, J.u Department of Chemistry − Ångström Laboratory, Uppsala University, Uppsala, Sweden4 aut
7001 a Tang, Shiu Umeå universitet,Institutionen för fysik,Umeå University, Sweden4 aut0 (Swepub:umu)shta0002
7001 a Lindh, E Mattias,d 1986-u RISE,Bioraffinaderi och energi,Sustainable Resource Conversion unit, Biorefinery and Energy department, RISE Research Institutes of Sweden AB, Storgatan 65, Umeå, Sweden,Umeå University, Sweden4 aut0 (Swepub:ri)mattiasli@ri.se
7001 a Gracia-Espino, Eduardou Umeå universitet,Institutionen för fysik,Umeå University, Sweden4 aut0 (Swepub:umu)eded0002
7001 a Larsen, Christianu Umeå universitet,Institutionen för fysik,Umeå University, Sweden4 aut0 (Swepub:umu)chla0032
7001 a Edman, Ludvig,d 1967-u Umeå universitet,Institutionen för fysik4 aut0 (Swepub:umu)lued0001
7102 a Umeå universitetb Institutionen för fysik4 org
7730 t Advanced Materialsd : John Wiley and Sons Incg 36:15q 36:15x 0935-9648x 1521-4095
8564 u https://doi.org/10.1002/adma.202310156y Fulltext
8564 u https://ri.diva-portal.org/smash/get/diva2:1840206/FULLTEXT01.pdfx primaryx Raw objecty fulltext:print
8564 u https://umu.diva-portal.org/smash/get/diva2:1832572/FULLTEXT01.pdfx primaryx Raw objecty fulltext:print
8564 8u https://urn.kb.se/resolve?urn=urn:nbn:se:ri:diva-71985
8564 8u https://doi.org/10.1002/adma.202310156
8564 8u https://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-220016

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