PFO-DBT:MEH-PPV:PC71BM Ternary Blend Assisted Platform as a Photodetector

Zafar, Qayyum; Ahmad, Zubair; Sulaiman, Khaulah

doi:10.3390/s150100965

Cited by 17 publications

(5 citation statements)

References 41 publications

(39 reference statements)

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“…(c) The fluorescence and chemiluminescence QYs of SPNs as a function of the energy intervals between the LUMO of 1,2-dioxentanedione and the HOMO of SPs. HOMO: −4.4 (PFPV), −5.0 (PFVA), −5.4 (PFODBT), −5.6 (PFO) and −5.9 ev (PFBT); the LUMO of 1,2-dioxetanedione is −3.2 ev …”

Section: Results and Discussionmentioning

confidence: 99%

Intraparticle Energy Level Alignment of Semiconducting Polymer Nanoparticles to Amplify Chemiluminescence for Ultrasensitive In Vivo Imaging of Reactive Oxygen Species

et al. 2016

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Detection of reactive oxygen species (ROS), a hallmark of many pathological processes, is imperative to understanding, detection and treatment of many life-threatening diseases. However, methods capable of real-time in situ imaging of ROS in living animals are still very limited. We herein report the development and optimization of chemiluminescent semiconducting polymer nanoparticles (SPNs) for ultrasensitive in vivo imaging of hydrogen peroxide (H2O2). The chemiluminescence is amplified by adjusting the energy levels between the luminescence reporter and the chemiluminescence substrate to facilitate intermolecular electron transfer in the process of H2O2-activated luminescence. The optimized SPN can emit chemiluminescence with the quantum yield up to 2.30 × 10(-2) einsteins/mol and detect H2O2 down to 5 nM, which substantially outperforms the previous probes. Further doping of this SPN with a naphthalocyanine dye creates intraparticle chemiluminescence resonance energy transfer (CRET), leading to the near-infrared (NIR) luminescence responding to H2O2. By virtue of high brightness and ideal NIR optical window, SPN-NIR permits ultrasensitive imaging of H2O2 in the mouse models of peritonitis and neuroinflammation with the minute administration quantity. Thus, this study not only provides a category of optical probes that eliminates the need of external light excitation for imaging of H2O2, but also reveals the underlying principle to enhance the brightness of chemiluminescence systems.

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Section: Results and Discussionmentioning

confidence: 99%

Intraparticle Energy Level Alignment of Semiconducting Polymer Nanoparticles to Amplify Chemiluminescence for Ultrasensitive In Vivo Imaging of Reactive Oxygen Species

et al. 2016

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“…To improve this, three semiconducting polymers with different HOMO levels, PFODBT, poly(9,9′‐dioctylfluorenyl‐2,7‐diyl) (PFO), and poly[(9,9′‐dioctylfluorenyl‐2,7‐diyl)‐alt‐(benzo[2,1,3]thiadiazol‐4,7‐diyl)] (PFBT), were combined with CPPO and F127 to synthesize the corresponding nanoprobes and compare their chemiluminescence intensities. The DOD has a LUMO level of −3.2 eV, [ 19 ] while PFODBT, PFO, and PFBT have HOMO levels of −5.4, [ 20 ] −5.6, [ 21 ] and −5.9 eV, [ 22 ] respectively ( Figure 3 a and Figure S11 , Supporting Information). Compared to the PFO CL nanoprobes and PFBT CL nanoprobes, the PFODBT CL nanoprobes showed the highest chemiluminescence intensity at various concentrations of H 2 O 2 (Figure 3b,c ).…”

Section: Resultsmentioning

confidence: 99%

Self‐Illuminating NIR‐II Chemiluminescence Nanosensor for In Vivo Tracking H₂O₂ Fluctuation

et al. 2023

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Chemiluminescence (CL) imaging, as an excitation‐free technique, exhibits a markedly improved signal‐to‐noise ratio (SNR) owing to the absence of an excitation light source and autofluorescence interference. However, conventional chemiluminescence imaging generally focuses on the visible and first near‐infrared (NIR‐I) regions, which hinders high‐performance biological imaging due to strong tissue scattering and absorption. To address the issue, self‐luminescent NIR‐II CL nanoprobes with a second near‐infrared (NIR‐II) luminescence in the presence of hydrogen peroxide are rationally designed. A cascade energy transfer, including chemiluminescence resonance energy transfer (CRET) from the chemiluminescent substrate to NIR‐I organic molecules and Förster resonance energy transfer (FRET) from NIR‐I organic molecules to NIR‐II organic molecules, occurs in the nanoprobes, contributing to NIR‐II light with great efficiency and good tissue penetration depth. Based on excellent selectivity, high sensitivity to hydrogen peroxide, and long‐lasting luminescence performance, the NIR‐II CL nanoprobes are applied to detect inflammation in mice, showing a 7.4‐fold enhancement in SNR compared with that of fluorescence.

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“…As Φ B has a direct correlation to charge injection, it can be modulated by utilizing photosensitive layers composed of different acceptors. The photoactive layers were composed of a donor, poly [4,8bis(5(2ethylhexyl)thiophen2yl)benzo[1,2b;4,5 b′]dithiophene2,6diylalt(4(2ethylhexyl)3fluorothieno [3,4b] thiophene)2carboxylate26diyl)] (PBDTTTEFT), [34][35][36] and three different acceptors ( [6,6]PhenylC 71 butyric acid methyl ester (PC 71 BM), [37][38][39] 2,2″[ [4,4,9,9tetrakis [40][41][42] and 5,5″[[4,4,9,9 tetrakis(2 ethylhexyl)4,9dihydros indaceno[1,2b:5,6b″]dithiophene2,7diyl]bis(2,1,3benzothiadi azole7,4diylmethylidyne)]bis[3ethyl2thioxo4thiazolidinone] (ehIDTBR)) (Figure 1a), [43][44][45] as a BHJ structure for efficient charge generation. [46][47][48] PC 71 BM is a representative fullerene derivative, and both IEICO4F and ehIDTBR are indacenodith iophene (IDT)based small molecule acceptors.…”

Section: Dark Current Characteristics Of Opd With Diode Architecture ...mentioning

confidence: 99%

Theoretical and Experimental Investigation of Barrier‐Energy‐Dependent Charge Injection Mechanisms in Organic Photodetectors

Jang

Nguyen

Wang

2022

Adv Funct Materials

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Charge injection is known as the major source of dark current under an applied reverse bias, which directly influences the performance of organic photodetectors with diode architecture. However, it is unclear which of various contributions, such as electron flow through the junction, shunt leakage, thermionic emission, and tunnelling, are dominant. This study investigates the thermionic emission and tunneling models to describe the origin of experimentally measured dark current generated in an organic photodetector. To elucidate the dominant mechanism, the barrier energies at anodic contacts are set from 0.6 to 1.0 eV using photosensitive layers composed of different acceptors. A linear relation is found between the natural logarithm of the dark current density under reverse bias and the square root of the barrier height, which strongly suggests direct tunneling as dominant mechanism for dark current injection. This conclusion is strengthened by temperature dependent dark current analysis. Further knowledge of the dominant mechanism by charge injection can help devise an effective strategy to suppress dark current for effective organic photodetector device implementation.

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PFO-DBT:MEH-PPV:PC71BM Ternary Blend Assisted Platform as a Photodetector

Cited by 17 publications

References 41 publications

Intraparticle Energy Level Alignment of Semiconducting Polymer Nanoparticles to Amplify Chemiluminescence for Ultrasensitive In Vivo Imaging of Reactive Oxygen Species

Intraparticle Energy Level Alignment of Semiconducting Polymer Nanoparticles to Amplify Chemiluminescence for Ultrasensitive In Vivo Imaging of Reactive Oxygen Species

Self‐Illuminating NIR‐II Chemiluminescence Nanosensor for In Vivo Tracking H₂O₂ Fluctuation

Theoretical and Experimental Investigation of Barrier‐Energy‐Dependent Charge Injection Mechanisms in Organic Photodetectors

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PFO-DBT:MEH-PPV:PC71BM Ternary Blend Assisted Platform as a Photodetector

Cited by 17 publications

References 41 publications

Intraparticle Energy Level Alignment of Semiconducting Polymer Nanoparticles to Amplify Chemiluminescence for Ultrasensitive In Vivo Imaging of Reactive Oxygen Species

Intraparticle Energy Level Alignment of Semiconducting Polymer Nanoparticles to Amplify Chemiluminescence for Ultrasensitive In Vivo Imaging of Reactive Oxygen Species

Self‐Illuminating NIR‐II Chemiluminescence Nanosensor for In Vivo Tracking H2O2 Fluctuation

Theoretical and Experimental Investigation of Barrier‐Energy‐Dependent Charge Injection Mechanisms in Organic Photodetectors

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Self‐Illuminating NIR‐II Chemiluminescence Nanosensor for In Vivo Tracking H₂O₂ Fluctuation