Solution-processed quantum dot light-emitting diodes with PANI:PSS hole-transport interlayers

Park, Young Ran; Doh, Ji Hoon; Shin, Keesam; Seo, Young Bong; Kim, Yun Seok; Kim, Soo Young; Choi, Won Kook; Hong, Young June

doi:10.1016/j.orgel.2014.12.030

Cited by 43 publications

(16 citation statements)

References 50 publications

(42 reference statements)

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“…Figure 1f shows the electronic energy level diagram (with respect to the vacuum level) of the layers applied for the QD-LEDs. The www.nature.com/scientificreports/ ionization energy (IE) and the electron affinity (EA) of these layers were estimated from the UV-visible absorption spectra (not shown here) and UPS analysis, which were in good agreement with the previous studies 3, 31,[33][34][35] . The electrical and electroluminescent performances of Cs 1−x FA x PbBr 3 QD-LEDs were examined by measuring the J-V-L characteristic curves.…”

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confidence: 85%

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Self-defect-passivation by Br-enrichment in FA-doped Cs1−xFAxPbBr3 quantum dots: towards high-performance quantum dot light-emitting diodes

Park

Eom

Kim

et al. 2020

Sci Rep

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Halide vacancy defect is one of the major origins of non-radiative recombination in the lead halide perovskite light emitting devices (LEDs). Hence the defect passivation is highly demanded for the high-performance perovskite LEDs. Here, we demonstrated that FA doping led to the enrichment of Br in Cs1−xFAxPbBr3 QDs. Due to the defect passivation by the enriched Br, the trap density in Cs1−xFAxPbBr3 significantly decreased after FA doping, and which improved the optical properties of Cs1−xFAxPbBr3 QDs and their QD-LEDs. PLQY of Cs1–xFAxPbBr3 QDs increased from 76.8% (x = 0) to 85.1% (x = 0.04), and Lmax and CEmax of Cs1–xFAxPbBr3 QD-LEDs were improved from Lmax = 2880 cd m−2 and CEmax = 1.98 cd A−1 (x = 0) to Lmax = 5200 cd m−2 and CEmax = 3.87 cd A−1 (x = 0.04). Cs1–xFAxPbBr3 QD-LED device structure was optimized by using PVK as a HTL and ZnO modified with b-PEI as an ETL. The energy band diagram of Cs1–xFAxPbBr3 QD-LEDs deduced by UPS analyses.

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confidence: 85%

“…Additionally, no notable parasitic emission originated from the PVK layer was observed ( Fig. 1e) 31 . Figure 1f shows the electronic energy level diagram (with respect to the vacuum level) of the layers applied for the QD-LEDs.…”

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confidence: 95%

Self-defect-passivation by Br-enrichment in FA-doped Cs1−xFAxPbBr3 quantum dots: towards high-performance quantum dot light-emitting diodes

Park

Eom

Kim

et al. 2020

Sci Rep

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“…[3,4] Consequently, this material has been widely studied for different applications in many domains such as electrochromic devices, rechargeable batteries, protection of metals against corrosion, [5,6] organic light emitting diodes (OLEDs), [7,8] organic photovoltaic cells (OPVs) [9] and dyesensitized solar cells (DSSCs). [10][11][12] Its reversible redox chemistry allows PANI to have mainly three distinguishable oxidation states.…”

Section: Introductionmentioning

confidence: 99%

Electropolymerized polyaniline: A promising hole selective contact in organic photoelectrochemical cells

Belarb

Blas‐Ferrando

Haro

et al. 2016

Chemical Engineering Science

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“…PANI is an excellent photosensitizer; it acts both as an efficient electron donor and as good hole transporter (Bejbouji et al 2010, Park et al 2015. The presence of PANI in the heterojunction based-photocatalysts improves the catalytic efficiency as well as the kinetics of the degradation reaction of pollutants, due to the incorporated nanostructure and the synergistic effect between the species (Tanwar and Mandal., 2019) 1 ].…”

Section: Photocatalytic Activitymentioning

confidence: 99%

Mixed oxide-polyaniline composite-coated woven cotton fabrics for the visible light catalyzed degradation of hazardous organic pollutants

et al. 2020

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Clean water and sea free of organic pollutants are among the 17 United Nation Sustainable Development Goals (SDGs). In this global concern, the design of efficient, stable and recyclable catalytic materials remains challenging. In this context, we designed a series of mixed oxide-modified cotton fabrics and their related composites and interrogated their propensity to catalyze the degradation of methyl orange (MO) (a model pollutant). More specifically, functional cotton fabrics (CF) coated with RuO 2 -TiO 2 based-photocatalysts were obtained by dip-coating method at neutral pH. A layer of Polyaniline (PANI) was prepared by in situ oxidative polymerization of the aniline monomer on 4-diphenylamine diazonium salt (DPA) modified-RuO 2 -TiO 2 nanoparticles (NPs) coated-CF. The modified CFs catalyzed photodegradation and mineralization of MO under visible light, which depended on polyaniline mass loading. The CF/RuO 2 -TiO 2 /DPA@PANI obtained by in situ polymerization was the best catalyst due to DPA adhesive layer for polyaniline to RuO 2 -TiO 2 , and the strong attraction force between cellulose OH groups and anilinium during polymerization. The photodegradation rate constant was 0.101, 0.0532, 0.0775 and 0.0828 min -1 for RuO 2 -TiO 2 /DPA@PANI, RuO 2 -TiO 2 , RuO 2 -TiO 2 /PANI and RuO 2 -TiO 2 /DPA/PANI coated-CFs, respectively. The catalytic activity is favored by the photoactive species (OH  , 2 − ) which are formed by the excitation of electrons under visible light but also by the electronic exchanges at the RuO 2 //TiO 2 , RuO 2 -TiO 2 //PANI and RuO 2 -TiO 2 /PANI//CF interfaces.CF/RuO 2 -TiO 2 /DPA/PANI photocatalyst was stable under simulated sunlight and reusable three times. A mechanism is proposed to account for the efficient CF catalytic properties.

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Solution-processed quantum dot light-emitting diodes with PANI:PSS hole-transport interlayers

Cited by 43 publications

References 50 publications

Self-defect-passivation by Br-enrichment in FA-doped Cs1−xFAxPbBr3 quantum dots: towards high-performance quantum dot light-emitting diodes

Self-defect-passivation by Br-enrichment in FA-doped Cs1−xFAxPbBr3 quantum dots: towards high-performance quantum dot light-emitting diodes

Electropolymerized polyaniline: A promising hole selective contact in organic photoelectrochemical cells

Mixed oxide-polyaniline composite-coated woven cotton fabrics for the visible light catalyzed degradation of hazardous organic pollutants

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