Surface morphological, structural, electrical and optical properties of annealed vanadyl tetra tert-butyl 2, 3 naphthalocyanine thin films

Dhanya, I.; Menon, C. S.

doi:10.1016/j.vacuum.2011.11.016

Cited by 10 publications

(8 citation statements)

References 14 publications

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“…This is the characteristic behavior of direct transitions in nanocrystalline NC film. This type of transition is in agreement with those published by Dhanya and Menon [1,16] and Farag et al [6].…”

Section: Optical Absorption Characterizationsupporting

confidence: 93%

“…It can also be noticed that this band shows the characteristic splitting (Davidov splitting) in all samples which has a value of 0.17 eV in agreement with other napthalocyanine molecules [9,14]. These characteristic excitations generally can be interpreted in terms of p-p* transitions between bonding and antibonding molecular orbitals [1]. Previous work on NC has identified these peaks as originating from naphthalocyanine and its derivatives absorption [1,7,9].…”

Section: Optical Absorption Characterizationsupporting

confidence: 69%

“…These characteristic excitations generally can be interpreted in terms of p-p* transitions between bonding and antibonding molecular orbitals [1]. Previous work on NC has identified these peaks as originating from naphthalocyanine and its derivatives absorption [1,7,9]. The optical band gap of NC can be determined from the analysis of the spectral dependence of the absorption near the fundamental absorption edges.…”

Section: Optical Absorption Characterizationmentioning

confidence: 99%

“…Organic semiconductors such as naphthalocyanines have been of wide interest due to the facility for application in communication, image processing, optical storage and other applications such as optoelectronic and electronic devices for solar cells due to their excellent chemical stability, low heat conduction, diversity of optical properties and their process ability to be cast as thin films by vacuum sublimation [1,2].…”

Section: Introductionmentioning

confidence: 99%

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Nano-flower 2,3-naphthalocyanine heterojunction for optoelectronic applications

et al. 2015

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Section: Optical Absorption Characterizationsupporting

confidence: 93%

Section: Optical Absorption Characterizationsupporting

confidence: 69%

Section: Optical Absorption Characterizationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Nano-flower 2,3-naphthalocyanine heterojunction for optoelectronic applications

et al. 2015

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“…It was observed that VTTBNc exhibits two broad peaks at B-band (333 nm) and Q-band region (761 nm and 810 nm). These absorption peaks are similar to the absorption spectra reported by Dhanya and Menon (2012) [20]. The absorption peak at the B-band correlates to the excitation of localized ππ* transition that occurred between the bonding and anti-bonding molecules.…”

Section: Absorption Characteristicssupporting

confidence: 85%

Naphthalocyanine-Based NIR Organic Photodiode: Understanding the Role of Different Types of Fullerenes

et al. 2021

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In this work, we presented experimental observation on solution-processed bulk heterojunction organic photodiode using vanadyl 2,11,20,29-tetra tert-butyl 2,3 naphthalocyanine (VTTBNc) as a p-type material. VTTBNc is blended with two different acceptors, which are PC61BM and PC71BM, to offer further understanding in evaluating the performance in organic photodiode (OPD). The blend film of VTTBNc:PC71BM with a volumetric ratio of 1:1 exhibits optimized performance in the VTTBNc blend structure with 2.31 × 109 Jones detectivity and 26.11 mA/W responsivity at a −1 V bias. The response and recovery time of VTTBNc:PC71BM were recorded as 241 ms and 310 ms, respectively. The light absorption measurement demonstrated that VTTBNc could extend the light absorption to the near-infrared (NIR) region. The detail of the enhancement of the performance by adding VTTBNc to the blend was further explained in the discussion section.

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Controllable Self‐Assembly of V═O Metalloradical Complex with Intramolecular Charge Transfer for Enhanced NIR‐II Fluorescence Imaging‐Guided Photothermal Therapy

Bao,

Li,

Wang

et al. 2024

Adv Healthcare Materials

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Near‐infrared second region (NIR‐II) fluorescence imaging provides enhanced tissue penetration, achieving efficient NIR‐II fluorescence and photoacoustic imaging (PA)‐guided photothermal therapy (PTT) all in one material remains a challenging yet promising approach in cancer treatment. Herein, open‐shell V═O metalloradical complex (VONc) is self‐assembled into VONc nanospheres (VONc NPs). VONc NPs exhibit light absorption from 300 to 1400 nm, fluorescence spectra ranging from 900 to 1400 nm, and a distinct fluorescence signal even at 1550 nm. Moreover, VONc NPs exhibit outstanding photostability and a higher photothermal conversion efficiency of 46.6% than that of closed‐shell zinc naphthalocyanine nanorods (ZnNc NRs). V═O centered metalloradical serves as transient electron‐withdrawing groups to facilitate charge transfer (CT), introducing additional nonradiative energy dissipation pathways and enhancing efficient heat generation. In vitro experiments of VONc NPs indicate that a highly effective photothermal action causes harm to both mitochondria and lysosomes, resulting in the death of tumor cells, closed‐shell ZnNc NPs exhibit almost no cell killing as contrast. In vivo anti‐tumor therapy results of VONc NPs demonstrate excellent NIR‐II fluorescence imaging‐guided PTT against tumors with a favorable biosafety profile. “Centered metalloradical boosting CT” toward open‐shell metal complexes provides significant insight for developing single‐material integrated nanosystems for diagnostic and therapeutic applications.

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Surface morphological, structural, electrical and optical properties of annealed vanadyl tetra tert-butyl 2, 3 naphthalocyanine thin films

Cited by 10 publications

References 14 publications

Nano-flower 2,3-naphthalocyanine heterojunction for optoelectronic applications

Nano-flower 2,3-naphthalocyanine heterojunction for optoelectronic applications

Naphthalocyanine-Based NIR Organic Photodiode: Understanding the Role of Different Types of Fullerenes

Controllable Self‐Assembly of V═O Metalloradical Complex with Intramolecular Charge Transfer for Enhanced NIR‐II Fluorescence Imaging‐Guided Photothermal Therapy

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