Förster resonance energy transfer and morphology optimization for high-performance ternary organic photodetectors

Wang, Fei; Yang, Xiaoyu; Niu, Meng-Si; Feng, Lin; Hao, Xiaotao

doi:10.1016/j.orgel.2019.01.020

Cited by 18 publications

(10 citation statements)

References 44 publications

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“…Förster resonance energy transfer (FRET) is one of the most popular methods in organic electronics to increase the efficiency of electroactive parts. − The Förster theory is based on the concept of treating a fluorophore as an oscillating dipole, which can nonradiatively transfer excitation energy to another dipole with a similar resonance frequency through the long-range dipole–dipole coupling and is a distance-dependent phenomenon (depends on the sixth power of donor–acceptor separation) . The theory is applicable for the media in which the molecules are either stationary or the molecular diffusion and energy migration is sufficiently low.…”

Section: Introductionmentioning

confidence: 99%

Effect of Diffusion on Photo-Induced Excited-State Energy Transfer between Fluorescent Semiconducting Molecules: Tris-(8-hydroxyquinoline) Aluminum and 6,13-Bis (Triisopropylsilylethynyl) Pentacene

et al. 2021

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In the present work, the effect of diffusion on photo-induced excitation energy transfer between fluorescent organic semiconducting molecules tris-(8hydroxyquinoline) aluminum (AlQ 3 , n-type donor) and 6,13-bis (triisopropylsilylethynyl) pentacene (TIPS-P, p-type acceptor) at a concentration range of 10 −4 to 10 −6 M in chloroform solution was studied by steady-state and time-domain fluorescence measurements. The donor−donor interaction strength is significantly weaker than the donor−acceptor strength (the ratio of donor−donor to donor−acceptor interaction strengths is 1.55 × 10 3 ) in chloroform solution. Considerable overlap between donor emission and acceptor absorption and high interaction parameters favors direct Forster energy transfer and exciplex (D*A) formation. Excitation energy migration does not take place between donor molecules. However, material diffusion appears to influence the donor decay dynamics by forming charge-transfer exciplex complexes and modulating the excitation energy transfer rate from the metal-to-ligand chargetransfer (MLCT) state of the donor to vibronic states of the acceptor at a low acceptor concentration. At high acceptor concentrations, energy transfer from the excited donor to acceptor occurs through the exchange mechanism along with Forster long-range dipole−dipole interactions, and the corresponding critical transfer distance is found to be ∼42 Å. A blue-shift in AlQ 3 emission, a red-shift in the 0−0 vibronic peak of TIPS-P, and quenching of exciplex decay following Stern−Volmer quenching are observed, with the increase in acceptor concentration. No evidence of excimer formation is observed in acceptor molecules.

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Section: Introductionmentioning

confidence: 99%

Effect of Diffusion on Photo-Induced Excited-State Energy Transfer between Fluorescent Semiconducting Molecules: Tris-(8-hydroxyquinoline) Aluminum and 6,13-Bis (Triisopropylsilylethynyl) Pentacene

et al. 2021

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“…3a, when excited by 500 nm light, the neat P3HT and ITIC films exhibit PL peaks at 640 nm and 760 nm, respectively. Compared with neat P3HT film, the PL intensity of P3HT is greatly quenched in P3HT:ITIC film, which indicates the existence of an energy transfer between P3HT and ITIC [22]. Similarly, the PL emission of P3HT is greatly quenched by doping with PC 71 BM in the P3HT:PC 71 BM film, which indicates analogical efficient energy transfer between P3HT and PC 71 BM.…”

Section: Resultsmentioning

confidence: 99%

High-Performance Organic Photodetectors by Introducing a Non-Fullerene Acceptor to Broaden Long Wavelength Detective Spectrum

et al. 2019

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We demonstrate the broadband visible organic photodetectors (OPDs) by introducing a non-fullerene acceptor of 3,9-bis(2-methylene-(3-(1,1dicyanomethylene)-indanone))-5,5,11,11-tetrakis(4-hexylphenyl)-dithieno[2,3d:2,3′-d′]-s-indaceno[1,2-b:5,6-b′]dithiophene (ITIC) into the bulk heterojunction (BHJ) based on a conventional system of poly(3-hexylthiophene-2,5-diyl) (P3HT):[6,6]-phenyl C71-butyric acid methyl ester (PC 71 BM) .The resultant OPDs exhibit a specific detectivity beyond 10 12 Jones in the whole visible region ranged from 380 nm to 760 nm, and the highest detectivity reaches 2.67 × 10 12 Jones at 710 nm. UV-Vis absorption spectrum, steady-state photoluminescence, atomic force microscopy, and space-charge-limited current property were applied to analyze the film characteristics of obtained OPDs. Owing to the long-wavelength absorption band of ITIC, the spectral photodetection range has been broadened effectively, and better film morphology, more effective energy transfer, and the reduced electron mobility in the active layer are responsible for the excellent photodetection capability. The proposed scheme provides a reliable strategy for implementing high-performance broadband visible OPDs.

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“…FRET between fluorescent organic semiconductor donor−acceptor systems thus plays a vital role in increasing the efficiency of devices, including organic photovoltaic (OPV), organic lightemitting diodes (OLED), solar cell, etc. [6][7][8][9]21,22 EET between different fluorescent organic semiconducting polymers or molecules is reported in the literature to explain the performance and characterization of various electronic devices. 1−4 FRET pair of [poly(9,9-dioctylfluorene-alcoholbenzothiadiazole] (F8BT) and P3HT (poly-3-hexylthiophene) in a blend film show that singlet excitons of F8BT transfer their excitation energy very fast within a picosecond to P3HT polymer.…”

Section: Introductionmentioning

confidence: 99%

Förster Resonance Energy Transfer between Fluorescent Organic Semiconductors: Poly(9,9-dioctylfluorene-alt-benzothiadiazole) and 6,13-Bis(triisopropylsilylethynyl)pentacene

et al. 2022

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In the present study, an investigation of the electronic excitation energy transfer between two p-type fluorescent semiconductors, F8BT [poly(9,9-dioctylfluorene-alcohol-benzothiadiazole] and TIPS-P [6,13-bis(triisopropylsilylethynyl)pentacene], has been carried out in a chloroform solution using steady-state and time-domain fluorescence techniques. The spectral overlap integral between donor (F8BT) emission and acceptor (TIPS-P) absorption is 2.04 × 1015 nm4/(M cm), and the corresponding critical transfer distance is 53.12 Å. In donor decay dynamics, at the lower acceptor concentrations, the observed results deviate from the Förster theory due to the combined effect of diffusion and energy migration. However, it does not exhibit energy migration and distribution for higher acceptor concentrations, and the system follows the Förster model of resonance excitation energy transfer (FRET). The higher value of the donor–acceptor interaction strength than self-interaction (donor–donor interaction) appears to be responsible for this behavior. Further, in acceptor decay, the appearance of the rise time and its decrease with the acceptor concentration confirms FRET from F8BT to TIPS-P.

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Förster resonance energy transfer and morphology optimization for high-performance ternary organic photodetectors

Cited by 18 publications

References 44 publications

Effect of Diffusion on Photo-Induced Excited-State Energy Transfer between Fluorescent Semiconducting Molecules: Tris-(8-hydroxyquinoline) Aluminum and 6,13-Bis (Triisopropylsilylethynyl) Pentacene

Effect of Diffusion on Photo-Induced Excited-State Energy Transfer between Fluorescent Semiconducting Molecules: Tris-(8-hydroxyquinoline) Aluminum and 6,13-Bis (Triisopropylsilylethynyl) Pentacene

High-Performance Organic Photodetectors by Introducing a Non-Fullerene Acceptor to Broaden Long Wavelength Detective Spectrum

Förster Resonance Energy Transfer between Fluorescent Organic Semiconductors: Poly(9,9-dioctylfluorene-alt-benzothiadiazole) and 6,13-Bis(triisopropylsilylethynyl)pentacene

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