Dendron engineering in self-host blue iridium dendrimers towards low-voltage-driving and power-efficient nondoped electrophosphorescent devices

2017 ◽  
Vol 53 (1) ◽  
pp. 180-183 ◽  
Author(s):  
Yang Wang ◽  
Shumeng Wang ◽  
Junqiao Ding ◽  
Lixiang Wang ◽  
Xiabin Jing ◽  
...  
Keyword(s):  
Energy Level ◽  
Low Voltage ◽  
Hole Injection ◽  
Homo Energy ◽  
Power Efficient ◽  
Homo Energy Level

Low-voltage-driving and power-efficient nondoped electrophosphorescent devices have been realized by increasing the dendron's HOMO energy level to favor effective hole injection and promote exciton formation.

Radical Cation and Neutral Radical of Aza-thia[7]helicene with SOMO–HOMO Energy Level Inversion

2016 ◽  
Vol 138 (23) ◽  
pp. 7298-7304 ◽  
Author(s):  
Ying Wang ◽  
Hui Zhang ◽  
Maren Pink ◽  
Arnon Olankitwanit ◽  
Suchada Rajca ◽  
...  
Keyword(s):  
Energy Level ◽  
Radical Cation ◽  
Homo Energy ◽  
Neutral Radical ◽  
Level Inversion ◽  
Homo Energy Level

Syntheses of PCDTBT containing tetrafluorobenzene as electron-withdrawing group with deep HOMO energy level and applications for photovoltaics

Polymer ◽  
2016 ◽  
Vol 102 ◽  
pp. 84-91 ◽  
Author(s):  
Juae Kim ◽  
Nam Hee Kim ◽  
Seyeong Song ◽  
Song Yi Park ◽  
Sangmin Chae ◽  
...  
Keyword(s):  
Energy Level ◽  
Homo Energy ◽  
Electron Withdrawing Group ◽  
Homo Energy Level

Flat conjugated polymers combining a relatively low HOMO energy level and band gap: polyselenophenes versus polythiophenes

2012 ◽  
Vol 22 (29) ◽  
pp. 14645 ◽  
Author(s):  
Elena Poverenov ◽  
Yana Sheynin ◽  
Natalia Zamoshchik ◽  
Asit Patra ◽  
Gregory Leitus ◽  
...  
Keyword(s):  
Energy Level ◽  
Conjugated Polymers ◽  
Band Gap ◽  
Homo Energy ◽  
Homo Energy Level

Ladder-like conjugated polymers used as hole-transporting materials for high-efficiency perovskite solar cells

2019 ◽  
Vol 7 (24) ◽  
pp. 14473-14477 ◽  
Author(s):  
Liren Zhang ◽  
Jionghua Wu ◽  
Dongmei Li ◽  
Wenhua Li ◽  
Qingbo Meng ◽  
...  
Keyword(s):  
Solar Cells ◽  
Energy Level ◽  
Conjugated Polymers ◽  
High Efficiency ◽  
Perovskite Solar Cells ◽  
Hole Mobility ◽  
Homo Energy ◽  
Hole Transporting ◽  
Hole Transporting Materials ◽  
Homo Energy Level

Intramolecular S–O interactions were adopted for designing HTMs with high hole mobility and a suitable HOMO energy level in PVSK.

The effect of alkylthio side chains in oligothiophene-based donor materials for organic solar cells

2018 ◽  
Vol 3 (1) ◽  
pp. 131-141 ◽  
Author(s):  
Yan Zou ◽  
Yue Wu ◽  
Hang Yang ◽  
Yingying Dong ◽  
Chaohua Cui ◽  
...  
Keyword(s):  
Absorption Spectrum ◽  
Solar Cells ◽  
Energy Level ◽  
Small Molecules ◽  
Organic Solar Cells ◽  
Side Chains ◽  
Homo Energy ◽  
Backbone Conformation ◽  
Molecular Backbone ◽  
Homo Energy Level

The engineering of alkylthio side chains in the molecular conjugated backbone of small molecules is in favor of achieving a linear molecular backbone conformation, slightly red-shifting the absorption spectrum, and down-shifting the HOMO energy level of the resulting molecule.

Discotic liquid crystals of transition metal complexes, 55: Novel chlorine-substituted phthalocyanine derivatives showing mesomorphism and low HOMO energy level

2018 ◽  
Vol 22 (01n03) ◽  
pp. 32-45 ◽  
Author(s):  
Masashi Yatabe ◽  
Akio Kajitani ◽  
Mikio Yasutake ◽  
Kazuchika Ohta
Keyword(s):  
Energy Level ◽  
Near Infrared ◽  
Infrared Region ◽  
Optical Microscope ◽  
The Other ◽  
Homo Energy ◽  
Chlorine Atoms ◽  
Other Hand ◽  
Temperature Variable ◽  
Homo Energy Level

We have synthesized a series of novel phthalocyaninato copper(II) (abbreviated as PcCu) compounds, 1,4,8,11,15,18,22,25-octakisalkoxy-2,3,9,10,16,17,23,24-octachloro-phthalocyaninato copper(II) (abbreviated as ([Formula: see text]-C[Formula: see text]O)[Formula: see text]-Cl)[Formula: see text]PcCu (4a–4d): [Formula: see text] 6 (a), 8 (b), 10 (c) and 12 (d)) and, for comparison, another series of PcCu compounds, 1,4,8,11,15,18,22,25-octakisalkoxyphthalocyaninato copper(II) (abbreviated as ([Formula: see text]-C[Formula: see text]O)[Formula: see text]PcCu (1a–1d)). The PcCu derivatives 1a–1d are substituted by alkoxy chains only at the [Formula: see text] positions (1,4,8,11,15,18,22,25). On the other hand, the PcCu derivatives 4a–4d are substituted by alkoxy chains at the [Formula: see text] positions and chlorine atoms at the [Formula: see text] positions (2,3,9,10,16,17,23,24). We have investigated the influence of chlorine atoms substituted at the [Formula: see text] positions of the Pc ring on mesomorphism, spectroscopic and electronic properties for these two series of PcCu derivatives 1 and 4 by using a polarizing optical microscope, DSC, temperature-variable small angle X-ray diffractometer, a UV-Vis spectrophotometer and cyclic voltammetry. Each of the derivatives 1a–1d is crystalline without showing mesomorphism. On the other hand, each of the chlorine-substituted PcCu derivatives 4a–4d shows plural phase transitions, and the longer chain-substituted PcCu derivatives 4c–4d show a rectangular ordered columnar [Col[Formula: see text](P2m)] mesophase. Furthermore, we have revealed that each of the PcCu derivatives 4a–4d shows a Q-band in the near-infrared region and a lower HOMO energy level than conventional phthalocyanine derivatives.

Cyclization of TEMPO Radicals Bound to Metalladithiolene Induced by SOMO–HOMO Energy-Level Conversion

2010 ◽  
Vol 122 (3) ◽  
pp. 539-541 ◽  
Author(s):  
Tetsuro Kusamoto ◽  
Shoko Kume ◽  
Hiroshi Nishihara
Keyword(s):  
Energy Level ◽  
Homo Energy ◽  
Homo Energy Level

Replacing 2,1,3-benzothiadiazole with 2,1,3-naphthothiadiazole in PCDTBT: towards a low bandgap polymer with deep HOMO energy level

2012 ◽  
Vol 3 (12) ◽  
pp. 3276 ◽  
Author(s):  
Jonggi Kim ◽  
Myoung Hee Yun ◽  
Gi-Hwan Kim ◽  
Jin Young Kim ◽  
Changduk Yang
Keyword(s):  
Energy Level ◽  
Homo Energy ◽  
Low Bandgap ◽  
Homo Energy Level

Energy-level modulation of coumarin-based molecular donors for efficient all small molecule fullerene-free organic solar cells

2021 ◽  
Author(s):  
Rashmirekha Pradhan ◽  
Hemraj Dahiya ◽  
Bhawani Prasad Bag ◽  
Mukhamed L. Keshtov ◽  
Rahul Singhal ◽  
...  
Keyword(s):  
Solar Cells ◽  
Energy Level ◽  
Small Molecule ◽  
Organic Solar Cells ◽  
Power Conversion ◽  
Homo Energy ◽  
Conversion Efficiencies ◽  
Homo Energy Level

Despite their minimal HOMO energy level offset promising power conversion efficiencies up to 13.54% have been recorded for ternary organic solar cells using coumarin-based molecular donors and fullerene-free acceptors.

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