Organic–inorganic hybrid perovskite quantum dot light-emitting diodes using a graphene electrode and modified PEDOT:PSS

Zhang, Qing; Yu, Hongtao; Liu, Ziwei; Lu, Yunxiang; Ye, Danqing; Qian, Jie; Wu, Ying; Gu, Wei; Ma, Ben; Zhang, Liuquan; Duan, Yu; Liu, Lihui; Cao, Kun; Chen, Shufen; Huang, Wei

doi:10.1039/c9ra02730k

Cited by 8 publications

(6 citation statements)

References 53 publications

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“…[62] (b) energy band structure of the PeLED; [62] (c) diagram of the QDs PeLED fabricated on graphene. [63] The active area of PeLEDs is defined by the overlapping zone between the transparent anode and metal cathode layers. Limited by the conductivity of the transparent anode, the injected charges from the edge of the PeLEDs have difficulties in diffusing into its central region as the size of device is amplified.…”

Section: Technologies For Fabricating Large-area Perovskite Layermentioning

confidence: 99%

“…6(c)), in which PEDOT:PSS was modified by Triton X-100 and DMSO. [63] In recent years, great progress is made on the basis of graphene, but there still exist some problems. For example, when it is prepared by chemical methods, graphene oxide cannot be fully reduced due to the limitation of the sub-088502-6…”

Section: Technologies For Fabricating Large-area Perovskite Layermentioning

confidence: 99%

“…6. (a) Device structure of PeLED with graphene electrode and MAPbBr 3 emitter;[62] (b) energy band structure of the PeLED;[62] (c) diagram of the QDs PeLED fabricated on graphene [63].…”

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confidence: 99%

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Large-area fabrication: The next target of perovskite light-emitting diodes*

Su¹,

Zhu²,

Qin³

et al. 2021

Chinese Phys. B

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Perovskite materials show exciting potential for light-emitting diodes (LEDs) owing to their intrinsically high photoluminescence efficiency and color purity. The research focusing on perovskite light-emitting diodes (PeLEDs) has experienced an exponential growth in the past six years. The maximum external quantum efficiency of red, green, and blue PeLEDs has surpassed 20%, 20%, and 10%, respectively. Nevertheless, the current PeLEDs are still in the laboratory stage, and the key for further development of PeLEDs is large-area fabrication. In this paper, we briefly discuss the similarities and differences between manufacturing high-quality and large-area PeLEDs and perovskite solar cells. Especially, the general technologies for fabricating large-area perovskite films are also introduced. The effect of charge transport layers and electrodes on large-area devices are discussed as well. Most importantly, we summarize the advances of large-area (active area ≥ 30 mm2) PeLEDs reported since 2017, and describe the methods for optimizing large-area PeLEDs reported in the literature. Finally, the development perspective of PeLEDs is presented for the goal of highly efficient and large-area PeLED fabrication. It is of great significance for the application of PeLEDs in future display and lighting.

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Section: Technologies For Fabricating Large-area Perovskite Layermentioning

confidence: 99%

Section: Technologies For Fabricating Large-area Perovskite Layermentioning

confidence: 99%

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Large-area fabrication: The next target of perovskite light-emitting diodes*

Su¹,

Zhu²,

Qin³

et al. 2021

Chinese Phys. B

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show abstract

“…In detail, 2D materials are expected to enhance the performance of PeLEDs through functionalizing as anode, HIL, HTL, EIL and dopant in these functional layers. However, there are only a few reports about their application in PeLEDs [64][65][66]. The device parameters of PeLEDs based on 2D materials were summarized in Table 4.…”

Section: Two-dimensional Materials In Perovskite Light Emitting Diodementioning

confidence: 99%

“…It can be attributed to the reduced exciton quenching by using the chemically inert graphene anode, as shown in Figure 9c. Zhang reported perovskite quantum dot (PQD) and nanocrystal (NC) LEDs with a two-layer graphene/PEDOT:PSS conductive film, in which monolayer graphene is an anode and PEDOT:PSS is a HTL, as shown in Figure 9d [65,66]. The graphene-based PQD device with MAPbBr 3 QDs EML exhibited the maximum CE of 2.12 cd/A and EQE of 0.67%, which are comparable with the values of 3.0 cd/A and 0.96% observed in the ITO device.…”

Section: Two-dimensional Materials In Perovskite Light Emitting Diodementioning

confidence: 99%

Improved Charge Injection and Transport of Light-Emitting Diodes Based on Two-Dimensional Materials

et al. 2019

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Light-emitting diodes (LEDs) are considered to be the most promising energy-saving technology for future lighting and display. Two-dimensional (2D) materials, a class of materials comprised of monolayer or few layers of atoms (or unit cells), have attracted much attention in recent years, due to their unique physical and chemical properties. Here, we summarize the recent advances on the applications of 2D materials for improving the performance of LEDs, including organic light emitting diodes (OLEDs), quantum dot light emitting diodes (QLEDs) and perovskite light emitting diodes (PeLEDs), using organic films, quantum dots and perovskite films as emission layers (EMLs), respectively. Two dimensional materials, including graphene and its derivatives and transition metal dichalcogenides (TMDs), can be employed as interlayers and dopant in composite functional layers for high-efficiency LEDs, suggesting the extensive application in LEDs. The functions of 2D materials used in LEDs include the improved work function, effective electron blocking, suppressed exciton quenching and reduced surface roughness. The potential application of 2D materials in PeLEDs is also presented and analyzed.

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Enhancement of Strain‐Sensing Performance through Gas Phase Incorporation of Siloxane into Thermoplastic Polyurethane‐Conducting Polymer Composite

Losaria

Yim

2020

Macro Chemistry & Physics

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In this study, thermoplastic polyurethane (TPU)‐conducting polymer (CP)–SiO2 hybrid strain sensors are fabricated via the simultaneous co‐vaporization of a CP monomer with tetraethyl orthosilicate (TEOS). Poly(3,4‐ethylenedioxythiophene) (PEDOT) and polypyrrole (PPy) hybrids prepared using the oxidant, iron (III) p‐toluenesulfonate hexahydrate (FTS) with TPU as the substrate are explored along with the effect of hybridization on their sensing performance and mechanical properties. The SiO2 is mostly formed on the surface and the CP is successfully polymerized within the TPU matrix. The sensor can be stretched further by up to 290% more than the pristine counterpart. Moreover, stretch‐release cycles show an increase in the relative resistance of the sensor by up to 89%, thereby improving its sensitivity. The sensors can detect motion at various strain levels, different speeds, and continuous deformation at different strains. The sensor’s reliability is tested by up to 1000 cycles at 10% strain, as well as other kinds of distortion such as bending and twisting. The created organic‐inorganic hybrid sensor exhibits a synergistic enhancement of both its mechanical properties and electromechanical performance. Furthermore, the processability of the elastomer and the versatility of the incorporated siloxane component have allowed the homogeneous distribution of the active elements (PEDOT, PPy).

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Organic–inorganic hybrid perovskite quantum dot light-emitting diodes using a graphene electrode and modified PEDOT:PSS

Abstract: A graphene electrode together with modified PEDOT:PSS was first applied into perovskite quantum dot light-emitting diodes to improve the device performance.

Cited by 8 publications

References 53 publications

Large-area fabrication: The next target of perovskite light-emitting diodes*

Large-area fabrication: The next target of perovskite light-emitting diodes*

Improved Charge Injection and Transport of Light-Emitting Diodes Based on Two-Dimensional Materials

Enhancement of Strain‐Sensing Performance through Gas Phase Incorporation of Siloxane into Thermoplastic Polyurethane‐Conducting Polymer Composite

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