Polymer–perovskite blend light-emitting diodes using a self-compensated heavily doped polymeric anode | Zendy

Antonio Gaetano Ricciardulli | Zendy; Bas van der Zee | Zendy; Kai Philipps | Zendy; GertJan A. H. Wetzelaer | Zendy; RuiQi Png | Zendy; Peter K. H. Ho | Zendy; LayLay Chua | Zendy; Paul W. M. Blom | Zendy

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Polymer–perovskite blend light-emitting diodes using a self-compensated heavily doped polymeric anode

Author(s) -

Antonio Gaetano Ricciardulli,

Bas van der Zee,

Kai Philipps,

GertJan A. H. Wetzelaer,

RuiQi Png,

Peter K. H. Ho,

LayLay Chua,

Paul W. M. Blom

Publication year - 2020

Publication title -

apl materials

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.571

H-Index - 60

ISSN - 2166-532X

DOI - 10.1063/1.5140519

Subject(s) - materials science , pedot:pss , perovskite (structure) , anode , polystyrene sulfonate , optoelectronics , doping , diode , electroluminescence , polymer , light emitting diode , chemical engineering , composite material , electrode , layer (electronics) , chemistry , engineering

Perovskite-based light-emitting diodes (PeLEDs) are drawing great attention due to their remarkable performance and ease of processing. Nevertheless, a critical aspect is the perovskite film formation on top of solution-processed anodes such as poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS). Use of conventional PEDOT:PSS anodes gives rise to high leakage currents that mask the hole transport properties of the perovskite semiconductor. Here, we show a feasible approach to overcome this constraint by implementing a solution-processed, self-compensated, hole-doped triarylamine-fluorene copolymer (p-pTFF-C2F5SIS) with a work function of 5.85 eV as the anode for polymer–perovskite blend LED devices. Highly efficient hole injection was obtained, near that of evaporated MoOx. Hole-only devices reveal that the hole transport in the polymer–perovskite blend is trap-limited. PeLEDs with the ultrahigh-workfunction p-pTFF-C2F5SIS anode show much lower leakage and much better stability in current-voltage and light output characteristics than those with the PEDOT:PSSH anode.

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