Ultrathin Reduced Graphene Oxide Films as Transparent Top‐Contacts for Light Switchable Solid‐State Molecular Junctions

Li, Tao; Jevric, Martyn; Hauptmann, Jonas Rahlf; Hviid, Rune; Wei, Zhongming; Wang, Rui; Reeler, Nini E. A.; Thyrhaug, Erling; Petersen, Susanne; Meyer, Jakob A. S.; Bovet, N.; Vosch, Tom; Nygård, Jesper; Qiu, Xiaohui; Hu, Wenping; Liu, Yunqi; Solomon, Gemma C.; Kjaergaard, Henrik G.; Bjørnholm, Thomas; Nielsen, Mogens Brøndsted; Laursen, Bo W.; Nørgaard, Kasper

doi:10.1002/adma.201300607

Cited by 78 publications

(77 citation statements)

References 65 publications

(33 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Functionalization of position 2 on the DHA skeleton has been most extensively explored. 5,6,[9][10][11][12][13][14][15][16][17][22][23][24][25][26][27][28] Aromatic groups are the substituents most widely incorporated, but few examples with methyl group on C-2 or cyclopentyl between C-2/C-3 have also been reported. 22 As described in the introduction (Scheme 3), the syntheses have followed either: (i) the [8+2] cycloaddition protocol, (ii) the route via nucleophilic addition of acetophenones to tropylium, followed by a Knoevenagel condensation with malononitrile, or (iii) an initial Knoevenagel condensation followed by reaction with tropylium species.…”

Section: Reactivity and Functionalization Of The Five-membered Ring Omentioning

confidence: 99%

Synthetic protocols for the key functionalizations of the photochromic dihydroazulene scaffold

Cacciarini¹,

Broman²,

Nielsen³

2014

Arkivoc

View full text Add to dashboard Cite

1,8a-Dihydroazulene-1,1-dicarbonitrile (DHA) is a photochromic molecule which upon irradiation undergoes ring-opening to a vinylheptafulvene (VHF). The system has many possible sites for functionalization and hence for tuning of its properties. In this account we summarize different synthetic protocols for attaching substituents at the ring carbon atoms of DHA as well as for replacing the cyano groups at position 1. In particular, positions 2 and 7 are most easily accessed, the latter from DHA by a regioselective bromination-elimination protocol.

show abstract

Section: Reactivity and Functionalization Of The Five-membered Ring Omentioning

confidence: 99%

Synthetic protocols for the key functionalizations of the photochromic dihydroazulene scaffold

Cacciarini¹,

Broman²,

Nielsen³

2014

Arkivoc

View full text Add to dashboard Cite

show abstract

“…[33][34][35][36] Herein, we demonstrate an experimental study on the heterostructure assembled by few-layered n-type MoS 2 and solution-processed p-type rGO. A more signifi cant photoluminescence (PL) shift (about 20 meV) was observed in the MoS 2 /rGO heterostructures compared to the PL peak position of individual MoS 2 .…”

Section: Introductionmentioning

confidence: 99%

Gate‐Tunable Ultrahigh Photoresponsivity of 2D Heterostructures Based on Few Layer MoS₂ and Solution‐Processed rGO

Yang

Huo

et al. 2015

Adv Elect Materials

Self Cite

View full text Add to dashboard Cite

2D materials heterostructures are built by vertical stacking of solution‐processed reduced graphene oxide (rGO) film and few‐layer MoS2. The Raman and photoluminescence of the MoS2/rGO heterostructures show more significant peak shift compared to individual MoS2 or rGO film. The field‐effect transistors (FETs) based on such MoS2/rGO heterostructures show ambipolar behavior in the dark but n‐type behavior under illumination. This phenomenon provides a way to investigate the charge transport in valence band of MoS2. Due to charge separation caused by built‐in potential at MoS2/rGO interface, the recombination of photoexcited electron–hole pairs is effectively suppressed, leading to high photoresponsivity (≈2.4 × 104 A W−1) and photogain (≈4.7 × 104) of the MoS2/rGO heterostructures in ambient air with modulation of gate bias and drain–source bias.

show abstract

“…Thus, ring-opening is associated with an increase in dipole moment and a change in color from yellow (DHA) to intense red (VHF). 8,9 We became interested to elucidate if this difference in properties could give rise to reversible, photochemically induced phase transitions.…”

Section: Introductionmentioning

confidence: 99%

Liquid crystalline dihydroazulene photoswitches

et al. 2015

Self Cite

View full text Add to dashboard Cite

A large selection of photochromic dihydroazulene (DHA) molecules incorporating various substituents at position 2 of the DHA core was prepared and investigated for their ability to form liquid crystalline phases. Incorporation of an octyloxy-substituted biphenyl substituent resulted in nematic phase behavior and it was possible to convert one such compound partly into its vinylheptafulvene (VHF) isomer upon irradiation with light when in the liquid crystalline phase. This conversion resulted in an increase in the molecular alignment of the phase. In time, the meta-stable VHF returns to the DHA where the alignment is maintained. The systematic structural variation has revealed that a biaryl spacer between the DHA and the alkyl chain is needed for liquid crystallinity and that the one aromatic ring in the spacer cannot be substituted by a triazole. This work presents an important step towards employing the dihydroazulenevinylheptafulvene photo/thermoswitch in photoactive liquid crystalline materials.

show abstract

Ultrathin Reduced Graphene Oxide Films as Transparent Top‐Contacts for Light Switchable Solid‐State Molecular Junctions

Cited by 78 publications

References 65 publications

Synthetic protocols for the key functionalizations of the photochromic dihydroazulene scaffold

Synthetic protocols for the key functionalizations of the photochromic dihydroazulene scaffold

Gate‐Tunable Ultrahigh Photoresponsivity of 2D Heterostructures Based on Few Layer MoS₂ and Solution‐Processed rGO

Liquid crystalline dihydroazulene photoswitches

Contact Info

Product

Resources

About

Ultrathin Reduced Graphene Oxide Films as Transparent Top‐Contacts for Light Switchable Solid‐State Molecular Junctions

Cited by 78 publications

References 65 publications

Synthetic protocols for the key functionalizations of the photochromic dihydroazulene scaffold

Synthetic protocols for the key functionalizations of the photochromic dihydroazulene scaffold

Gate‐Tunable Ultrahigh Photoresponsivity of 2D Heterostructures Based on Few Layer MoS2 and Solution‐Processed rGO

Liquid crystalline dihydroazulene photoswitches

Contact Info

Product

Resources

About

Gate‐Tunable Ultrahigh Photoresponsivity of 2D Heterostructures Based on Few Layer MoS₂ and Solution‐Processed rGO