How does alkyl chain length modify the properties of triphenylamine-based hole transport materials?

2018 ◽  
Vol 6 (5) ◽  
pp. 960-965 ◽  
Author(s):  
Kun-Han Lin ◽  
Antonio Prlj ◽  
Clémence Corminboeuf
Keyword(s):  
Chain Length ◽  
Organic Materials ◽  
Alkyl Chain ◽  
Perovskite Solar Cells ◽  
Hole Transport ◽  
Alkyl Chain Length ◽  
Multiscale Simulations ◽  
Alkyl Chains ◽  
Systematic Exploration ◽  
Fine Tune

Manipulating the length of alkyl chains is a widely-adopted strategy to fine tune the properties of organic materials. Yet, a systematic exploration of the influence of chain length on those properties most relevant to highly performing hole transport materials in perovskite solar cells is lacking. Multiscale simulations, along with morphological analyses, uncover relationships between alkyl chain length and HTM properties providing important insights for the optimization of future organic materials.

scholarly journals Effect of alkyl chain length on the properties of triphenylamine-based hole transport materials and their performance in perovskite solar cells

2018 ◽  
Vol 20 (2) ◽  
pp. 1252-1260 ◽  
Author(s):  
Rosinda Fuentes Pineda ◽  
Joel Troughton ◽  
Miquel Planells ◽  
Irene Sanchez-Molina Santos ◽  
Farmin Muhith ◽  
...  
Keyword(s):  
Solar Cells ◽  
Chain Length ◽  
Alkyl Chain ◽  
Perovskite Solar Cells ◽  
Hole Transport ◽  
Alkyl Chain Length

Five triarylamine derivatives with different para-alkoxy chains were compared as hole-transport materials in perovskite solar cells.

Untersuchungen der elektrischen Leitfähigkeit homologer 4,4′-Di-n-alkyloxy-azoxybenzole im nematischen Phasenbereich / Investigation of the Electric Conductivity of Homologous 4,4′-Di-n-alkoxyazoxybenzenes in their Nematic Phase

1975 ◽  
Vol 30 (3) ◽  
pp. 316-322 ◽  
Author(s):  
G. Heppke ◽  
F. Schneider
Keyword(s):  
Electric Conductivity ◽  
Chain Length ◽  
Nematic Phase ◽  
Alkyl Chain ◽  
Electrolyte Concentration ◽  
Alkyl Chain Length ◽  
Effect Of Temperature ◽  
Alkyl Chains ◽  
Long Chains

The effect of temperature and concentration of the added electrolyte tetrabutylammoniumpicrate on the electric conductivity of homologous 4,4′-di-n-alkoxyazoxybenzenes (C1 to C8) in their nematic phase is investigated. In general an increase of the alkyl chain length results in a decrease of the ratio of anisotropy x∥/x⊥. At the lowest temperature of the nematic phase values between 1,6 (C2) and 0,45 (C8) are obtained. This behaviour can be explained by the formation of cybotactic groups with a smectic structure. Increasing the electrolyte concentration reduces the ratio of anisotropy for short alkyl chains, whereas for long chains the ratio rapidly increases.

Understanding the effect of alkyl chains of gemini cations on the physicochemical and cellular properties of polyurethane micelles

2018 ◽  
Vol 6 (7) ◽  
pp. 1899-1907 ◽  
Author(s):  
Zhicheng Pan ◽  
Danxuan Fang ◽  
Yuanqing Song ◽  
Nijia Song ◽  
Mingming Ding ◽  
...  
Keyword(s):  
Surface Charge ◽  
Chain Length ◽  
Alkyl Chain ◽  
Alkyl Chain Length ◽  
Absorption Properties ◽  
Protein Absorption ◽  
Alkyl Chains

The alteration of the gemini alkyl chain length could affect the surface charge exposure, stability, and the protein absorption properties of nanocarriers.

scholarly journals Moisture tolerant solar cells by encapsulating 3D perovskite with long-chain alkylammonium cation-based 2D perovskite

2021 ◽  
Vol 2 (1) ◽  
Author(s):  
Bhushan P. Kore ◽  
Wei Zhang ◽  
Billy W. Hoogendoorn ◽  
Majid Safdari ◽  
James M. Gardner
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Chain Length ◽  
Alkyl Chain ◽  
Perovskite Solar Cells ◽  
Open Circuit ◽  
Alkyl Chain Length ◽  
Environmental Stability ◽  
Alkylammonium Cation ◽  
Long Chain

AbstractLong-term stability is an essential requirement for perovskite solar cells to be commercially viable. Encapsulating 3D perovskites with 2D perovskite structures is an effective strategy for improving resistance to moisture. However, long-chain alkylammonium cation-based 2D perovskites have been rarely studied in solar cells. Here, we study three different alkyl chain length organic cation-based 2D perovskite coatings for 3D perovskites. The 2D perovskite incorporated solar cells show significant improvement in solar cell stability with limited compromise in solar cell efficiency, with the longest alkyl chain length sample showing only a 20% drop in power conversion efficiency after 6 months at a relative humidity of 25-80%, and could be completely immersed in water for a few minutes before degradation started. The 2D perovskite coating also mitigated non-radiative recombination in the light-absorbing 3D perovskite, leading to an enhancement in the open circuit voltage. These findings suggest that long-chain alkylammonium cation based 2D perovskites can improve the environmental stability of 3D based perovskites without significant losses to device performance.

Correlating alkyl chain length with defect passivation efficacy in perovskite solar cells

2020 ◽  
Vol 56 (37) ◽  
pp. 5006-5009 ◽  
Author(s):  
Wenhuai Feng ◽  
Chengxi Zhang ◽  
Jun-Xing Zhong ◽  
Liming Ding ◽  
Wu-Qiang Wu
Keyword(s):  
Solar Cells ◽  
Chain Length ◽  
Alkyl Chain ◽  
Perovskite Solar Cells ◽  
Charge Recombination ◽  
Alkyl Chain Length ◽  
Defect Passivation ◽  
Amine Ligands ◽  
Chain Lengths

Anchoring of amine ligands with different alkyl chain lengths on perovskites mitigates non-radiative charge recombination in perovskite solar cells.

Biological Activity of New N-Oxides of Tertiary Amines

2006 ◽  
Vol 61 (9-10) ◽  
pp. 715-720 ◽  
Author(s):  
Halina Kleszczyńska ◽  
Krzysztof Bielecki ◽  
Janusz Sarapuk ◽  
Dorota Bonarska-Kujawa ◽  
Hanna Pruchnik ◽  
...  
Keyword(s):  
Membrane Potential ◽  
Chain Length ◽  
Alkyl Chain ◽  
Alkyl Chain Length ◽  
Resting Membrane Potential ◽  
Tertiary Amines ◽  
Alkyl Chains ◽  
Main Transition ◽  
Chain Compounds ◽  
Potassium Leakage

AbstractPotential biological properties of newly synthesized single and double alkyl chain N-oxides of tertiary amines (NTA) were studied. Individual compounds in each of the series had alkyl chains of different length. Various experiments were performed to determine a mechanism of the interaction between NTA and model and biological membranes. These were measurements of hemolytic efficiencies of NTA (pig erythrocytes), their influence on the transition temperatures (DPPC liposomes), on potassium leakage from cucumber, its growth and chlorophyll content (Cucumis sativus cv. Krak F1), and on the resting membrane potential in alga cells (Nitellopsis obtusa). Also, prevention of erythrocyte membrane lipid oxidation induced by UV irradiation was studied. Potential antioxidative properties of NTA were additionally tested in radical chromogen (ABTS●+) experiments in which antioxidative efficiencies of NTA were compared to that of the standard antioxidant Trolox. It was found that NTA readily interacted with erythrocyte membranes. Their hemolyzing efficiency increased with the alkyl chain length. Slightly more intensive interaction was found for double alkyl chain compounds. Similar results were obtained in DSC experiments, where incorporation of NTA into liposomal membranes shifted the main transition temperatures and caused a broadening of the main transition peaks depending on the alkyl chain length. Double alkyl chain compounds were also found more efficiently influencing the growth of cucumber. Influence of NTA on the resting membrane potential of algae cells was not quite following the alkyl chain length rule found in erythrocyte and liposome experiments. Also potassium leakage and chlorophyll content determined in physiological experiments were not following the increase of lipophilicity of compounds. Most efficiently influencing those parameters were NTA having shorter alkyl chains, and efficiencies of single alkyl chain compounds were evidently stronger. Both methods used to test the antioxidative properties of NTA showed that they depended on the alkyl chain lengths of compounds within each series, but double alkyl chain ones exhibited markedly greater efficiency.

Aggregation behavior of zwitterionic surface active ionic liquids with different counterions, cations, and alkyl chains

RSC Advances ◽  
2016 ◽  
Vol 6 (33) ◽  
pp. 27370-27377 ◽  
Author(s):  
Panpan Sun ◽  
Lijuan Shi ◽  
Fei Lu ◽  
Liqiang Zheng
Keyword(s):  
Ionic Liquids ◽  
Chain Length ◽  
Self Assembly ◽  
Alkyl Chain ◽  
Alkyl Chain Length ◽  
Aggregation Behavior ◽  
The Self ◽  
Alkyl Chains ◽  
Surface Active

The effects of anionic type, cationic structure and alkyl chain length are illustrated to regulate the self-assembly of zwitterionic SAILs.

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