Homoleptic platinum(ii) complexes with pyridyltriazole ligands: excimer-forming phosphorescent emitters for solution-processed OLEDs

Two new homoleptic platinum(ii) complexes are reported that feature aryl-appended 5-(2-pyridyl)-1,2,4-triazole chelates acting as N^N− ligating ions, PtL12 and PtL22. They have been used to prepare high-efficiency OLEDs, in which unimolecular and bimolecular excited states contribute green and red emission respectively.

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New hole transport styrene polymers bearing highly π-extended conjugated side-chain moieties for high-performance solution-processable thermally activated delayed fluorescence OLEDs

Polymer Chemistry ◽

10.1039/d1py00026h ◽

2021 ◽

Vol 12 (11) ◽

pp. 1692-1699

Author(s):

Ji Hye Lee ◽

Jinhyo Hwang ◽

Chai Won Kim ◽

Amit Kumar Harit ◽

Han Young Woo ◽

...

Keyword(s):

High Performance ◽

High Efficiency ◽

Delayed Fluorescence ◽

Hole Transport ◽

Side Chain ◽

Solution Processed ◽

Thermally Activated Delayed Fluorescence ◽

Thermally Activated ◽

Turn On ◽

Solution Processable

New polystyrene-based polymers with high π-extended hole transport pendants were synthesized to obtain a low turn-on voltage and high efficiency in solution-processed green TADF-OLEDs.

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On the role of solution-processed bathocuproine in high-efficiency inverted perovskite solar cells

Solar Energy ◽

10.1016/j.solener.2021.02.047 ◽

2021 ◽

Vol 218 ◽

pp. 142-149

Author(s):

Shou-En Chiang ◽

Anjali Chandel ◽

Diksha Thakur ◽

Yan-Ta Chen ◽

Pei-Chen Lin ◽

...

Keyword(s):

Solar Cells ◽

High Efficiency ◽

Perovskite Solar Cells ◽

Solution Processed

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Solution-Processed Transparent Conducting Electrodes for Flexible Organic Solar Cells with 16.61% Efficiency

Nano-Micro Letters ◽

10.1007/s40820-020-00566-3 ◽

2021 ◽

Vol 13 (1) ◽

Author(s):

Juanyong Wan ◽

Yonggao Xia ◽

Junfeng Fang ◽

Zhiguo Zhang ◽

Bingang Xu ◽

...

Keyword(s):

Solar Cells ◽

Work Function ◽

Organic Solar Cells ◽

High Performance ◽

High Efficiency ◽

Electrical Stability ◽

Solution Processed ◽

Good Thermal Stability ◽

Transparent Conducting ◽

High Flexibility

AbstractNonfullerene organic solar cells (OSCs) have achieved breakthrough with pushing the efficiency exceeding 17%. While this shed light on OSC commercialization, high-performance flexible OSCs should be pursued through solution manufacturing. Herein, we report a solution-processed flexible OSC based on a transparent conducting PEDOT:PSS anode doped with trifluoromethanesulfonic acid (CF3SO3H). Through a low-concentration and low-temperature CF3SO3H doping, the conducting polymer anodes exhibited a main sheet resistance of 35 Ω sq−1 (minimum value: 32 Ω sq−1), a raised work function (≈ 5.0 eV), a superior wettability, and a high electrical stability. The high work function minimized the energy level mismatch among the anodes, hole-transporting layers and electron-donors of the active layers, thereby leading to an enhanced carrier extraction. The solution-processed flexible OSCs yielded a record-high efficiency of 16.41% (maximum value: 16.61%). Besides, the flexible OSCs afforded the 1000 cyclic bending tests at the radius of 1.5 mm and the long-time thermal treatments at 85 °C, demonstrating a high flexibility and a good thermal stability.

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