Optimized electron-transport material based on m-terphenyl-diphenylphosphine oxide with the harmonious compatibility of high E<sub>T</sub> and electron mobility for highly efficient OLEDs

Zhang, Qing; Wang, Bo; Tan, Jianghong; Mu, Guangyuan; Yi, Wei; Lv, Xialei; Zhuang, Shaoqing; Liu, Wei; Wang, Lei

doi:10.1039/c7tc02459b

Cited by 35 publications

(23 citation statements)

References 48 publications

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“…The m e values of TPBi are also in line with those in the literature. 55 We consider that BBIA is a good ETM due to its high thermal stability and high electron mobility. The LED devices were fabricated using colloidal perovskite nanocrystals as the emission layer (EML).…”

Section: Resultsmentioning

confidence: 99%

Efficient perovskite nanocrystal light-emitting diodes using a benzimidazole-substituted anthracene derivative as the electron transport material

et al. 2019

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Section: Resultsmentioning

confidence: 99%

Efficient perovskite nanocrystal light-emitting diodes using a benzimidazole-substituted anthracene derivative as the electron transport material

et al. 2019

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“…Fig. 2 shows the simulated mobility vs. experimental data from Zhang, et al (2). For the simulation based on the accurate energy model (orange) we find a very good match to experimental data and the Gaussian disorder model (blue) underestimating the mobility by a factor of four while reproducing the experimental trend.…”

Section: Resultsmentioning

confidence: 66%

22‐3: Tuning ETL Mobility by Disorder Passivation

Kaiser

Symalla

Wehl

et al. 2021

Symp Digest of Tech Papers

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In organic electronics (OE) application a high degree of control of material parameters such as transport levels and charge carrier mobilities is required to build a balanced device. We demonstrate that electron mobility of the prototypical electron transport material TPBi can be tuned freely by mixing it with a secondary electron transport inert material. We can in particular increase electron mobility in TPBi by up to a factor of 10 by diluting TPBi. This increase is due to a reduced electrostatic disorder in the mixed morphology. Using our predictive ab‐initio based modeling tools we can find the optimal mixture to maximize or pinpoint electron mobility in TPBi.

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“…The HTL of PVK in the LEDs device structure plays an important role, so the 5% NaBr‐modified CsPbBr 3 NPs LED device with different thickness of PVK are fabricated to explore it (Figure S14, Supporting Information). It is found that the performance is the worst without PVK because of the exciton quenching of CsPbBr 3 NPs by NiO x and charge imbalance from that low electron mobility of TPBi miss match with high hole mobility of NiO x , and it gets better and then gets worse with the increase of PVK thickness. When the PVK film is spin coated from 8 mg mL −1 chlorobenzene (CB) solution, the LEDs device possesses the best performance.…”

Section: Resultsmentioning

confidence: 99%

Sodium Ion Modifying In Situ Fabricated CsPbBr₃ Nanoparticles for Efficient Perovskite Light Emitting Diodes

Chen

Fan

Zhang

et al. 2019

Advanced Optical Materials

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All‐inorganic perovskite has attracted much attention because of the higher stability. Many organic additives such as alkyl chain ammonium and polymers are usually introduced into perovskite to improve their performance. However, the long chain ammonium cations in perovskite may restrain the carrier transfer ability and ultimately deteriorate the performance of light‐emitting diodes (LEDs). In this work, the CsPbBr3 nanoparticles (NPs) are in situ fabricated by the synergistic effect of poly(ethylene oxide) and phenethylammonium bromide (PEABr). Particularly, sodium bromide (NaBr) with better conductivity is successfully introduced into CsPbBr3 NPs to substitute PEA partially, ultimately to passivate the defect and promote the carrier transfer ability. Besides, the addition of NaBr results in a better promotion for electron mobility than for hole mobility leading to a more balanced charge transport in devices. It enables NaBr based CsPbBr3 NPs green LEDs to exhibit a maximum external quantum efficiency (EQEmax) of 17.4%, which presents obvious enhancement compared to the LEDs without NaBr (EQEmax = 12%). Further, NaBr based CsPbBr3 NPs LEDs with a large area of 108 mm2 still show a high maximum EQE of 10.2%. Above all, this work provides a feasible way of adding metal additive in perovskite films to improve the performance of perovskite LEDs.

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Optimized electron-transport material based on m-terphenyl-diphenylphosphine oxide with the harmonious compatibility of high E_T and electron mobility for highly efficient OLEDs

Abstract: Harmonious compatibility of high ET and electron mobility for highly efficient OLEDs.

Cited by 35 publications

References 48 publications

Efficient perovskite nanocrystal light-emitting diodes using a benzimidazole-substituted anthracene derivative as the electron transport material

Efficient perovskite nanocrystal light-emitting diodes using a benzimidazole-substituted anthracene derivative as the electron transport material

22‐3: Tuning ETL Mobility by Disorder Passivation

Sodium Ion Modifying In Situ Fabricated CsPbBr₃ Nanoparticles for Efficient Perovskite Light Emitting Diodes

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Optimized electron-transport material based on m-terphenyl-diphenylphosphine oxide with the harmonious compatibility of high ET and electron mobility for highly efficient OLEDs

Abstract: Harmonious compatibility of high ET and electron mobility for highly efficient OLEDs.

Cited by 35 publications

References 48 publications

Efficient perovskite nanocrystal light-emitting diodes using a benzimidazole-substituted anthracene derivative as the electron transport material

Efficient perovskite nanocrystal light-emitting diodes using a benzimidazole-substituted anthracene derivative as the electron transport material

22‐3: Tuning ETL Mobility by Disorder Passivation

Sodium Ion Modifying In Situ Fabricated CsPbBr3 Nanoparticles for Efficient Perovskite Light Emitting Diodes

Contact Info

Product

Resources

About

Optimized electron-transport material based on m-terphenyl-diphenylphosphine oxide with the harmonious compatibility of high E_T and electron mobility for highly efficient OLEDs

Sodium Ion Modifying In Situ Fabricated CsPbBr₃ Nanoparticles for Efficient Perovskite Light Emitting Diodes