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Kim, Jin Young
Next Generation Energy Laboratory
Research Interests
  • Polymer solar cells, QD solar cells, organic-inorganic hybrid solar cells, perovskite solar cells, OLEDs, PeLEDs, organic FETs

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Conjugated Polyelectrolytes as Efficient Hole Transport Layers in Perovskite Light-Emitting Diodes

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Title
Conjugated Polyelectrolytes as Efficient Hole Transport Layers in Perovskite Light-Emitting Diodes
Author
Lee, Bo RamYu, Jae ChulPark, Jong HyunLee, SeungjinMai, Cheng-KangZhao, BaodanWong, Matthew S.Jung, Eui DaeNam, Yun SeokPark, Song YiDi Nuzzo, DanieleKim, Jin YoungStranks, Samuel DBazan, Guillermo C.Choi, HyosungSong, Myoung HoonFriend, Richard H.
Issue Date
201806
Publisher
AMER CHEMICAL SOC
Citation
ACS NANO, v.12, no.6, pp.5826 - 5833
Abstract
Perovskite-based optoelectronic devices have been rapidly developing in the past 5 years. Since the first report the external quantum efficiency (EQE) of perovskite light-emitting diodes (PeLEDs) has increased rapidly through the control of morphology and structure from 0.1% to more than 11%. Here, we report the use of various conjugated polyelectrolytes (CPEs) as the hole injection layer in PeLEDs. In particular, we find that poly[2,6-(4,4-bis-potassium butanylsulfonate)-4H-cyclopenta-[2,1-b;3,4-b′]-dithiophene)] (PCPDT-K) transfers holes effectively, blocks electron transport from the perovskite to the underlying ITO layer and reduces luminescence quenching at the perovskite/PCPDT-K interface. Our optimized PeLEDs with PCPDT-K show enhanced EQE by a factors of approximately 2 compared to control PeLEDs with PEDOT:PSS, reaching EQE values of 1.5%, and exhibit improved device stability.
URI
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DOI
http://dx.doi.org/10.1021/acsnano.8b01715
ISSN
1936-0851
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