Recent Advances of Exciplex-Based White Organic Light-Emitting Diodes

Xiao, Peng; Huang, Junhua; Yu, Yi-Cong; Yuan, Jian; Luo, Dongxiang; Liu, Baiquan

doi:10.3390/app8091449

Cited by 42 publications

(29 citation statements)

References 215 publications

(230 reference statements)

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“…To evaluate whether impurity-doped nanocrystal LEDs can satisfy the demand of real commercialization, other parameters are also required to be considered, such as CE, PE, efficiency droop, operational voltage, luminance, lifetime, and color purity [ 212 , 213 , 214 , 215 , 216 ]. In general, CE is directly proportional to EQE.…”

Section: Strategies To Achieve High-performance Impurity-doped Nanmentioning

confidence: 99%

Emergence of Impurity-Doped Nanocrystal Light-Emitting Diodes

Luo

Wang

Qiu³

et al. 2020

Nanomaterials

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In recent years, impurity-doped nanocrystal light-emitting diodes (LEDs) have aroused both academic and industrial interest since they are highly promising to satisfy the increasing demand of display, lighting, and signaling technologies. Compared with undoped counterparts, impurity-doped nanocrystal LEDs have been demonstrated to possess many extraordinary characteristics including enhanced efficiency, increased luminance, reduced voltage, and prolonged stability. In this review, recent state-of-the-art concepts to achieve high-performance impurity-doped nanocrystal LEDs are summarized. Firstly, the fundamental concepts of impurity-doped nanocrystal LEDs are presented. Then, the strategies to enhance the performance of impurity-doped nanocrystal LEDs via both material design and device engineering are introduced. In particular, the emergence of three types of impurity-doped nanocrystal LEDs is comprehensively highlighted, namely impurity-doped colloidal quantum dot LEDs, impurity-doped perovskite LEDs, and impurity-doped colloidal quantum well LEDs. At last, the challenges and the opportunities to further improve the performance of impurity-doped nanocrystal LEDs are described.

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Section: Strategies To Achieve High-performance Impurity-doped Nanmentioning

confidence: 99%

Emergence of Impurity-Doped Nanocrystal Light-Emitting Diodes

Luo

Wang

Qiu³

et al. 2020

Nanomaterials

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“…According to the above concepts, aside from the consideration of perovskite emitters, the innovation of device engineering is another element to determine the performance of all-inorganic PeLEDs. After the selection of perovskites, the EQE is vitally affected by the charge balance from the perspective of device engineering [136,137,138,139,140,141,142,143,144,145]. This is because the EQE in LEDs is defined as follows [146,147,148,149,150]: EQE=ηout⋅r⋅q⋅γ, where η out represents the outcoupling factor, r represents the fraction of excitons that potentially radiatively decay, q represents the PLQY and γ represents the charge balance.…”

Section: The Device Engineering In All-inorganic Peledsmentioning

confidence: 99%

Device Engineering for All-Inorganic Perovskite Light-Emitting Diodes

Luo

Qiu²,

Zhang

et al. 2019

Nanomaterials

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Recently, all-inorganic perovskite light-emitting diodes (PeLEDs) have attracted both academic and industrial interest thanks to their outstanding properties, such as high efficiency, bright luminance, excellent color purity, low cost and potentially good operational stability. Apart from the design and treatment of all-inorganic emitters, the device engineering is another significant factor to guarantee the high performance. In this review, we have summarized the state-of-the-art concepts for device engineering in all-inorganic PeLEDs, where the charge injection, transport, balance and leakage play a critical role in the performance. First, we have described the fundamental concepts of all-inorganic PeLEDs. Then, we have introduced the enhancement of device engineering in all-inorganic PeLEDs. Particularly, we have comprehensively highlighted the emergence of all-inorganic PeLEDs, strategies to improve the hole injection, approaches to enhance the electron injection, schemes to increase the charge balance and methods to decrease the charge leakage. Finally, we have clarified the issues and ways to further enhance the performance of all-inorganic PeLEDs.

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“…Since these excited state species can be formed with any kind of materials such as fluorescent, or TADF emitters, hosts materials etc. WOLEDs based on exciplex and electroplex have been widely investigated by various research groups [28]. However, WOLEDs based on exciplex or electroplex usually suffers from the disadvantages of low color stability and poor lifetime.…”

Section: Woleds Based On Blending Approach and Exciplex Formationmentioning

confidence: 99%

White light emitting diode based on purely organic fluorescent to modern thermally activated delayed fluorescence (TADF) and perovskite materials

et al. 2019

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White organic/polymer light emitting diode (WOLED/WPLED) processed from solution has attracted significant research interest in recent years due to their low device production cost, device flexibility, easy fabrication over large area including roll to roll and ability to print in various designs and shapes providing enormous design possibilities. Although WOLEDs fabricated using solution process lack their thermally evaporated counterparts in terms of device efficiency, remarkable progress has been made in this regard in recent years by utilizing new materials and device structures. In the present review, we have summarized and extrapolated an excellent association of old and modern concept of cost-effective materials and device structure for realization of white light. In particular, this article demonstrated and focused on design, and development of novel synthesis strategy, mechanistic insights and device engineering for solution process low cost WOLEDs device. Herein, an overview of the prevailing routes towards white light emitting devices (WLEDs) and corresponding materials used, including polymer based WLED, small molecules emitters based thermally activated delayed fluorescence (TADF), perovskite light-emitting diodes (PeLEDs) and hybrid materials based LEDs, color down-converting coatings with corresponding best efficiencies ever realized. We presume that this exhaustive review on WLEDs will offer a broad overview of the latest developments on white SSL and stonework the approach en route for innovations in the immediate future.

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Recent Advances of Exciplex-Based White Organic Light-Emitting Diodes

Cited by 42 publications

References 215 publications

Emergence of Impurity-Doped Nanocrystal Light-Emitting Diodes

Emergence of Impurity-Doped Nanocrystal Light-Emitting Diodes

Device Engineering for All-Inorganic Perovskite Light-Emitting Diodes

White light emitting diode based on purely organic fluorescent to modern thermally activated delayed fluorescence (TADF) and perovskite materials

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