Efficient Cyclometalated Platinum(II) Complex with Superior Operational Stability

Zhu, Zhi; Klimes, Kody; Holloway, S. M.; Li, Jian

doi:10.1002/adma.201605002

Cited by 85 publications

(61 citation statements)

References 55 publications

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“…Further modification of the structure of complex 33 resulted in the related compound 35 that showed a more intense (PLQY = 0.63) and orange-red emission band with the maximum centered at 582 nm and an excited state lifetime of 7.3 μs in CH 2 Cl 2 at room temperature [82]. EL performances were investigated in a charge balanced OLED device, with bi-layer EML architecture comprising two different dopant concentrations in order to shift exciton formation zone deeper into the emissive layer (device configuration: ITO/HATCN/NPD/TrisPCz/compound 35 20 wt %:CBP/compound 35 6 wt %:CBP/BAlq/BPyTP/LiF/Al).…”

Section: Reviewmentioning

confidence: 99%

Recent advances in phosphorescent platinum complexes for organic light-emitting diodes

Cebrián

Mauro

2018

Beilstein J. Org. Chem.

150

114

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Phosphorescent organometallic compounds based on heavy transition metal complexes (TMCs) are an appealing research topic of enormous current interest. Amongst all different fields in which they found valuable application, development of emitting materials based on TMCs have become crucial for electroluminescent devices such as phosphorescent organic light-emitting diodes (PhOLEDs) and light-emitting electrochemical cells (LEECs). This interest is driven by the fact that luminescent TMCs with long-lived excited state lifetimes are able to efficiently harvest both singlet and triplet electro-generated excitons, thus opening the possibility to achieve theoretically 100% internal quantum efficiency in such devices. In the recent past, various classes of compounds have been reported, possessing a beautiful structural variety that allowed to nicely obtain efficient photo- and electroluminescence with high colour purity in the red, green and blue (RGB) portions of the visible spectrum. In addition, achievement of efficient emission beyond such range towards ultraviolet (UV) and near infrared (NIR) regions was also challenged. By employing TMCs as triplet emitters in OLEDs, remarkably high device performances were demonstrated, with square planar platinum(II) complexes bearing π-conjugated chromophoric ligands playing a key role in such respect. In this contribution, the most recent and promising trends in the field of phosphorescent platinum complexes will be reviewed and discussed. In particular, the importance of proper molecular design that underpins the successful achievement of improved photophysical features and enhanced device performances will be highlighted. Special emphasis will be devoted to those recent systems that have been employed as triplet emitters in efficient PhOLEDs.

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Section: Reviewmentioning

confidence: 99%

Recent advances in phosphorescent platinum complexes for organic light-emitting diodes

Cebrián

Mauro

2018

Beilstein J. Org. Chem.

150

114

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“…Especially, the device performance of blue PeLEDs urgently needs to be improved. In addition, the operational stability of PeLEDs (half‐lifetime of over 250 h at an initial luminance of 100 cd m −2 ) is still much inferior to the stability of OLEDs (half‐lifetime of over 500 000 h at an initial luminance of 1000 cd m −2 ) and QLEDs (half‐lifetime about 300 000 h at an initial luminance of at 100 cd m −2 ) . Moreover, eventual elimination of toxic lead through the development of alternative perovskites also needs to be addressed.…”

Section: Discussionmentioning

confidence: 99%

Metal Halide Perovskite Light‐Emitting Devices: Promising Technology for Next‐Generation Displays

Zhang

Wang

et al. 2019

Adv Funct Materials

355

292

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As the requirements and expectation for displays in society are growing, higher standards of the display technology are proposed, including wider color gamut, higher color purity, and higher resolution. The recent emergence of light-emitting halide perovskites has come with numerous advantages, such as high charge-carrier mobility, tunable emission wavelength, narrow emission linewidth, and intrinsically high photoluminescence quantum yield. Recent advancement of perovskite-based light-emitting diodes (PeLEDs) as a promising technology for next-generation displays is reviewed. Here, how the attractive optical and electrical properties of perovskite materials can be translated into high PeLED performance are discussed, and working mechanisms and optimization approaches of both perovskite materials and the respective devices are analyzed. On the material side this includes the control of size and composition of perovskites grains and nanocrystals, surface and interface passivation, doping and alloying, while on the device side this includes the interfacial engineering and energy level adjustments, and photon emission enhancement. Several challenges such as performance of blue PeLEDs, the environmental and operational stability of PeLEDs, and the toxicity issues of lead halide perovskites are discussed, and perspectives on future developments of perovskite materials and PeLEDs for the display technology are offered.

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“…For instance, the EQE has exceeded 40% for both OLEDs and QLEDs, but the highest EQE for perovskite NC LEDs just reached 21.3%. The operational stability of perovskite NC LEDs is still much inferior to those of OLEDs (half‐lifetime over 500 000 hour at a luminance of 1000 cd m −2 ) and QLEDs (half‐lifetime about 300 000 hour at a luminance of at 100 cd m −2 ) …”

Section: Optoelectronic Applications Of Perovskite Ncsmentioning

confidence: 99%

Metal halide perovskite nanocrystals and their applications in optoelectronic devices

Wang

et al. 2019

InfoMat

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In recent years, metal halide perovskite nanocrystals (NCs) have been favored by many researchers due to their unique properties including long carrier diffusion length, high carrier mobility, tunable emission wavelength, and narrow full width at half maximum, making them great application potentials in optoelectronic devices. The photoluminescence quantum yields of perovskite NCs are nearly 100%, and the device efficiency of perovskite NC‐based light‐emitting diodes (LEDs) has been improved significantly from below 0.1% to over 20%. In addition, perovskite NC‐based solar cells and photodetectors have also developed rapidly in recent years. Here, we summarize the synthesis and the basic optoelectronic properties of metal halide perovskite NCs and introduce their applications in LEDs, solar cells, and photodetectors.

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Efficient Cyclometalated Platinum(II) Complex with Superior Operational Stability

Cited by 85 publications

References 55 publications

Recent advances in phosphorescent platinum complexes for organic light-emitting diodes

Recent advances in phosphorescent platinum complexes for organic light-emitting diodes

Metal Halide Perovskite Light‐Emitting Devices: Promising Technology for Next‐Generation Displays

Metal halide perovskite nanocrystals and their applications in optoelectronic devices

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