Optimizing the performance of P3HT-based photodetector by tuning the composition of OXCBA

Hisamuddin, Syaza Nafisah; Abdullah, Shahino Mah; Alwi, Siiti Anis Khairani; Majid, S.R.; Anuar, Afiq; Sulaiman, Khaulah; Tunmee, Sarayut; Chanlek, Narong; Bawazeer, Tahani M.; Alsoufi, Mohammad S.; Alsenany, Nourah; Supangat, Azzuliani

doi:10.1016/j.synthmet.2020.116506

Cited by 10 publications

(4 citation statements)

References 45 publications

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“…The peak found at ∼1086 cm −1 was not from the P 3 HT molecules; therefore, this vibration peak may have corresponded to interactions of the P 3 HT molecules and the Sb 2 S 3 NCs. The peak located at ∼1378 cm −1 was associated with the asymmetric vibrations of C=C skeletal stretching deformation, and the peak appearing at∼1518 cm −1 corresponded to stretching vibrations from the P 3 HT, which agrees with a previous study [ 24 ]. A higher intensity peak at ∼1442 cm −1 was related to the high P 3 HT structural order [ 25 ].…”

Section: Resultssupporting

confidence: 92%

Optimization of Sb2S3 Nanocrystal Concentrations in P3HT: PCBM Layers to Improve the Performance of Polymer Solar Cells

et al. 2021

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In this study, polymer solar cells were synthesized by adding Sb2S3 nanocrystals (NCs) to thin blended films with polymer poly(3-hexylthiophene)(P3HT) and [6,6]-phenyl-C61-butyric-acid-methyl-ester (PCBM) as the p-type material prepared via the spin-coating method. The purpose of this study is to investigate the dependence of polymer solar cells’ performance on the concentration of Sb2S3 nanocrystals. The effect of the Sb2S3 nanocrystal concentrations (0.01, 0.02, 0.03, and 0.04 mg/mL) in the polymer’s active layer was determined using different characterization techniques. X-ray diffraction (XRD) displayed doped ratio dependences of P3HT crystallite orientations of P3HT crystallites inside a block polymer film. Introducing Sb2S3 NCs increased the light harvesting and regulated the energy levels, improving the electronic parameters. Considerable photoluminescence quenching was observed due to additional excited electron pathways through the Sb2S3 NCs. A UV–visible absorption spectra measurement showed the relationship between the optoelectronic properties and improved surface morphology, and this enhancement was detected by a red shift in the absorption spectrum. The absorber layer’s doping concentration played a definitive role in improving the device’s performance. Using a 0.04 mg/mL doping concentration, a solar cell device with a glass /ITO/PEDOT:PSS/P3HT-PCBM: Sb2S3:NC/MoO3/Ag structure achieved a maximum power conversion efficiency of 2.72%. These Sb2S3 NCs obtained by solvothermal fabrication blended with a P3HT: PCBM polymer, would pave the way for a more effective design of organic photovoltaic devices.

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Section: Resultssupporting

confidence: 92%

Optimization of Sb2S3 Nanocrystal Concentrations in P3HT: PCBM Layers to Improve the Performance of Polymer Solar Cells

et al. 2021

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“…The values of the A and B parameters for all applied models are similar. The determined values of Eg have been confirmed in other works [30,34]. The determination of optical Eg is not possible through the application of Lorentz oscillators.…”

Section: Resultssupporting

confidence: 78%

The Determination of the Electronic Parameters of Thin Amorphous Organic Films by Ellipsometric and Spectrophotometric Study

et al. 2020

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The aim of this work was the determination of the basic optical parameters and electronic structure of conjugated polymer films by two commonly used techniques—spectrophotometry and ellipsometry. Poly(3-hexylthiophene (P3HT) and poly(3-octylthiophene (P3OT) conductive polymers films deposited on a glass substrate by the spin-coating technique showed very comparable surface structures composed of grains of similar sizes and shapes. X-ray tests confirmed that the polythiophene layers are amorphous, which confirmed the correctness of the choice of the optical models used. Selected optical models (Lorentz, Tauc–Lorentz and Cody–Lorentz) have been applied in order to determine the thickness, and optical parameters such as refractive index and extinction coefficient, absolute absorption and electronic parameters (energy gap Eg, amplitude A and broadening B). Spectral absorption determined from spectrophotometric measurement is similar to the absorption spectrum obtained from the ellipsometry method with the application of oscillator models.

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“…After evaporation of HTL films, the RMS surface roughness kept at a superior level. The results indicated that the original surface morphology has not been damaged by the introduction of NPB, and the reduced cracks provided a better contact interface for holes collection [25][26][27].…”

Section: Resultsmentioning

confidence: 99%

Performance enhancement of an organic photodetector enabled by NPB modified hole transport layer

Liu¹,

Liu²,

Xiao³

et al. 2022

J. Phys. D: Appl. Phys.

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Transport layers are extremely important for organic photodetectors (OPDs) due to their effective role in improving the charge selectivity at the contacts, thus leading to high photoresponse and low dark current. The quintessential hole transport layer (HTL), e.g. MoO3, is suffering from the work function instability caused by the preparation process and the evolution in external environment. In this paper, we introduce an N,N'-bis-(1-naphthyl)-N,N'-diphenyl-1,1'-biphenyl-4,4'-diamine (NPB) interfacial layer to modify MoO3 HTL. At an optimized NPB thickness of 20 nm, the photocurrent density of the device increases by 19%, thus the responsivity and external quantum efficiency are raised to 0.44 A W−1 and 75% at 725 nm. Besides, owing to the suppressed dark current, the optimized device showcases an enhanced specific detectivity of over 1011 Jones in the range of 460-750 nm (under negative bias). This achievement is assigned to the improvement in transport and collection efficiency of holes. The study provides a feasible method of HTL modification to improve the performance of OPDs.

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Optimizing the performance of P3HT-based photodetector by tuning the composition of OXCBA

Cited by 10 publications

References 45 publications

Optimization of Sb2S3 Nanocrystal Concentrations in P3HT: PCBM Layers to Improve the Performance of Polymer Solar Cells

Optimization of Sb2S3 Nanocrystal Concentrations in P3HT: PCBM Layers to Improve the Performance of Polymer Solar Cells

The Determination of the Electronic Parameters of Thin Amorphous Organic Films by Ellipsometric and Spectrophotometric Study

Performance enhancement of an organic photodetector enabled by NPB modified hole transport layer

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