Improvement of Blue Organic Photodiode with Pyrazol-Derivative

Segi, Kazuhiko; Naka, Shigeki; Okada, Hiroyuki

doi:10.2494/photopolymer.27.343

Cited by 7 publications

(5 citation statements)

References 16 publications

(18 reference statements)

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“…As shown in Figure b, after exposing to a blue light-emitting diode (450 nm, 2.2 mW/cm 2 ) for 10 000 s, the device exhibited an excellent reproducible response to periodic intermittent light and there was only a small decrease in the photocurrent of the OPD, indicating a good stability of the PSeN-based OPDs. In addition, the comparison of the performance with previously reported blue-light OPD was provided in the Table S1. − …”

Section: Resultsmentioning

confidence: 99%

Poly(dithiazolfluorene-alt-selenadiazolobenzotriazole)-Based Blue-Light Photodetector and Its Application in Visible-Light Communication

Guo¹,

Wang

Wang³

et al. 2019

ACS Appl. Mater. Interfaces

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Conjugated polymers have attracted broad interest from synthetic chemists and device developers in optoelectronic fields. In this study, we report a blue-light organic photodetector (OPD) based on our low-band and ambipolar PSeN polymer. Besides high stability, the device has excellent color-selective property in the visible-light region. At the bias of −3 V, the ratio of the external quantum efficiency (EQE) in blue to red is more than 10:1. Meanwhile, the device also shows very low dark current density of ∼21 nA/cm2 and high EQE more than 100% for blue light at the bias of −3 V. Then, the mechanism of the high EQE in single-sensitive layer structure devices is analyzed by considering the activation energy of traps and carrier injection. Furthermore, for portable purposes, a flexible blue-light OPD is designed. This OPD shows a great orthogonal light response to blue and orange contents in a white light source and will be a potential candidate in a two-channel visible-light communication system.

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Section: Resultsmentioning

confidence: 99%

Poly(dithiazolfluorene-alt-selenadiazolobenzotriazole)-Based Blue-Light Photodetector and Its Application in Visible-Light Communication

Guo¹,

Wang

Wang³

et al. 2019

ACS Appl. Mater. Interfaces

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“…Segi et al chose to thermally evaporate pyrazol derivative and 2,5-bis(5-tert-butyl-benzoxazol-2-yl) thiophene (BBOT)/bathocuproine to form a planar heterojunction OPD for blue detection. [32] They found that inserting merely 1 nm of Rubrene between the donor and acceptor boosts the photocurrent by 3.4 times while maintaining low dark current density ≈5 × 10 −11 A cm −2 . Exciting as those results are, compared to commercial inorganic PDs, those blue OPDs still lag behind predominantly due to low photocurrent.…”

Section: Introductionmentioning

confidence: 99%

High‐Performance Filterless Blue Narrowband Organic Photodetectors

Zhang,

Winkler,

Wolansky

et al. 2023

Adv Funct Materials

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Modern image sensors necessitate three color‐selective photodetectors: red, green, and blue (RGB) sensing units. Among those, blue light‐specific photodetectors are comparably much less reported. Here, a fully thermal‐evaporated organic photodetector (OPD) with narrowband blue detection based on exploring the dual role of the hole‐transporting layer is elegantly demonstrated. By incorporating a MoO3‐doped underlayer, the narrowband OPD achieves high external quantum efficiency up to 50% at 0 V with thin‐film devices. By adopting an intrinsic underlayer in planar junction configuration along with efficient hole and electron blocking layers, an ultralow dark current (2.46 × 10−12 A cm−2 at −0.1 V) is achieved. The device has a calculated specific detectivity (D*) reaching a record‐high value of 6.35 × 1014 Jones, outperforming commercial silicon photodetectors, and an ultrahigh linear dynamic range of 205 dB. This work paves the way for high‐sensitivity narrowband organic photodetectors in the visible spectral region.

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“…In the previous study, we have investigated unique multifunction diodes with both emission and light sensing function using a pyrazol-derivative. 4,5 Bright emission over 9,000 cd/m 2 and high ratio of photo-and dark-conductivity of 10 4 under reverse bias condition were demonstrated in the pyrazole-derivative based devices. Also, polymer based multifunction diodes were realized by emitter doping dyes such as rubrene or tris(2-phenylpyridinato)iridium (III) (Ir(ppy) 3 ) into poly(3-hexylthophene) (P3HT) and [6,6]-phenyl C61-butyric acid methyl ester (PCBM) blend.…”

Section: Introductionmentioning

confidence: 99%

“…One of the motivations in our research was realization a function of a color sensor. 4,5 A specific color sensing ability and high J SC may have a relation of the trade-off.…”

Section: Ipce (%)mentioning

confidence: 99%

“…Recently, organic optoelectronic devices, such as, organic lightemitting diodes (OLEDs), 1 organic photovoltaic device (OPVs), 2,3 organic photodiodes (OPDs), [4][5][6][7] and organic phototransistor 8 have been actively studied. Because a certain organic material has a characteristic optical property, a new functional device is expected, for example, that has both light-emitting and photo-sensing abilities.…”

Section: Introductionmentioning

confidence: 99%

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Light-emitting Organic Photovoltaic Devices Based on Rubrene/PTCDI-C13 Stack

2017

Self Cite

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Organic multi-function diode with a function of light-emitting, photovoltaic, and color-sensing was demonstrated using a stack of 5,6,11,12-tetraphenylnaphthacene (rubrene) as an emitter/donor and N,N′-ditridecylperylene-3,4,9,10-tetracarboxylic diimide (PTCDI-C13) as an electron transporter/accepter. The device shows electroluminescent properties with a maximum luminance 840 cd/m 2 with yellow emission based on rubrene, photovoltaic properties with power conversion efficiency 0.15% under AM1.5, and green color sensing with high on/off ratio over 10 4 under reverse bias of −1 V.

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Improvement of Blue Organic Photodiode with Pyrazol-Derivative

Cited by 7 publications

References 16 publications

Poly(dithiazolfluorene-alt-selenadiazolobenzotriazole)-Based Blue-Light Photodetector and Its Application in Visible-Light Communication

Poly(dithiazolfluorene-alt-selenadiazolobenzotriazole)-Based Blue-Light Photodetector and Its Application in Visible-Light Communication

High‐Performance Filterless Blue Narrowband Organic Photodetectors

Light-emitting Organic Photovoltaic Devices Based on Rubrene/PTCDI-C13 Stack

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