Journal of Semiconductors, Volume. 43, Issue 9, 092302(2022)
Organic bulk heterojunction enabled with nanocapsules of hydrate vanadium pentaoxide layer for high responsivity self-powered photodetector
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Fig. 1. (Color online) Schematic architecture of organic photodetector and the image of fabricated device.
Fig. 3. (Color online) One-step method of synthesis of HVO nanocapsules.
Fig. 5. (a) SEM image of HVO thin film on the scale of 1µm and (b) 25 nm respectively on ITO coated substrate.
Fig. 6. (a, b) HR-TEM image (scale 20nm). (c) SAED pattern of HVO nano capsule.
Fig. 7. (Color online) (a) Absorption spectra of PBDB-T-2Cl and PC71BM. (b) Transmittance and absorption spectra of HVO and PBDB-T-2Cl: PC71BM blend.
Fig. 8. (Color online) Cyclic voltammetry of (a) HVO, (b) PC71BM, and (c) PBDB-T-2Cl. (d) HOMO-LUMO energy level of polymers and charge transfer in the active layer.
Fig. 9. (Color online)I–V characteristics of OPD under dark and illumination
Fig. 10. (Color online) Current time response of the photodetector.
Fig. 11. (Color online) The charge transport mechanism of photodetector.
Table 0. Comparison table of various self-powered organic based photodetectors.
View tableView in ArticleTable 0. Comparison table of various self-powered organic based photodetectors.
Entity Ref. [ 44 ]Ref. [ 45 ]Ref. [ 30 ]Ref. [ 46 ]Ref. [ 38 ]This article Junction – PBDTT-ffQ: PC71BM P3HT:PC71BM PNTT-H: PC71BM PQT-12: PC61BM PBDB-T-2Cl and PC71BM Transportationlayer ETL:Zr–TiOx – HTL:PEDOT:PSS HTL:PEDOT:PSS ETL:ZnO QDs HTL:HVO nano capsules Device structure ITO/PEDOT:PSS/CH3NH3PbIxCl3−x/PC60BM/Zr–TiOx/Al PET/PBDTT-ffQ:PC71BM/Au ITO/PEDOT:PSS/P3HT:PC71BM /Al ITO/PEDOT:PSS/PNTT-H:PC71BM/Ca/Al ZnO QDs/PQT-12:PC61BM/MoOx Glass/ITO/HVO/PBDB-T-2Cl and PC71BM/Al Self-powered Yes Yes Yes Yes Yes Maximum temp used in fabrication (ºC) 130–150 ~30 100 100–150 200 100 Operating bias (V) –0.1 – –10 –0.1 0 0 Rise time (µs) 0.29 0.0889 – 32 0.07 0.03 Delay time (µs) 0.27 0.0667 – 29 0.1 0.04 Wavelength (nm) 525 365 650 760 515 550 Responsivity (A/W) 0.380 0.115 0.255 0.360 0.1675 6.25 Power density ( ) 1 mW/cm2 = 1 Sun – 2 – 0.057 1 mW/cm2 = 1 Sun EQE (%) – – 49 (at 520 nm, –10 V)& 53500 (at 620 nm, –60 V) 59.45 41.6 1400 (at 550 nm,0 V) NEP (W/( )) – – – – – 2 × 10–11 Detectivity (1011 Jones) 137 6.19 1.3 139 4 40 (0 V, 550 nm)
Table 0. Optical and electrochemical characteristics of polymers.
View tableView in ArticleTable 0. Optical and electrochemical characteristics of polymers.
Polymer λmax (s)(nm) λmax (f)(nm) EHOMO(eV) ELUMO(eV) Egech(eV) Egopt(eV) PBDB-T-2CL 606 621 −5.32 −3.57 1.75 1.85 PC71BM 373, 460 325 −5.90 −3.90 2 2.13
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Hemraj Dahiya, Anupam Agrawal, Ganesh D. Sharma, Abhishek Kumar Singh. Organic bulk heterojunction enabled with nanocapsules of hydrate vanadium pentaoxide layer for high responsivity self-powered photodetector[J]. Journal of Semiconductors, 2022, 43(9): 092302
Paper Information
Category: Articles
Received: Feb. 26, 2022
Accepted: --
Published Online: Nov. 17, 2022
The Author Email: Singh Abhishek Kumar (aks@rgipt.ac.in)
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